Rheological context of emplacement of the Dori,
Gorom-Gorom and Touka Bayèl granitic plutons
(northeast Burkina Faso, West African Craton)

Adama Ouédraogo Yaméogo, Pascal Ouiya, Abraham Seydoux Traoré, Saga Sawadogo, Séta Naba, Sonia Rousse, Mélina Macouin

► To cite this version:

Adama Ouédraogo Yaméogo, Pascal Ouiya, Abraham Seydoux Traoré, Saga Sawadogo, Séta Naba, et al.. Rheological context of emplacement of the Dori, Gorom-Gorom and Touka Bayèl granitic plutons (northeast Burkina Faso, West African Craton). Journal of African Earth Sciences, 2023, 208, pp.105081. 10.1016/j.jafrearsci.2023.105081. insu-04453240

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Rheological context of emplacement of the Dori, Gorom-Gorom and Touka Bayèl granitic plutons (northeast Burkina Faso, West African Craton)

Adama Ouédraogo Yameogo, Pascal Ouiya, Abraham Seydoux Traore, Saga Sawadogo, Séta Naba, Sonia Rousse, Mélina Macouin

PII: S1464-343X(23)00254-6

DOI: https://doi.org/10.1016/j.jafrearsci.2023.105081

Reference: AES 105081

To appear in: *Journal of African Earth Sciences*

Received Date: 19 June 2023

Revised Date: 18 September 2023

Accepted Date: 2 October 2023

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Please cite this article as: Yameogo, Adama.Oué., Ouiya, P., Traore, A.S., Sawadogo, S., Naba, Sé., Rousse, S., Macouin, Mé., Rheological context of emplacement of the Dori, Gorom-Gorom and Touka Bayèl granitic plutons (northeast Burkina Faso, West African Craton), *Journal of African Earth Sciences* (2023), doi: https://doi.org/10.1016/j.jafrearsci.2023.105081.

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© 2023 Published by Elsevier Ltd.
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Rheological context of emplacement of the Dori, Gorom-Gorom and Touka Bayèl granitic plutons (northeast Burkina Faso, West African Craton)

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Authors: **Adama Ouédraogo YAMEOGO**<sup>a*,b</sup>, **Pascal OUIYA**<sup>b,c</sup>, **Abraham Seydoux TRAORE**<sup>b</sup>, ** Saga SAWADOGO**<sup>b</sup>, ** Séta NABA**<sup>b</sup>, ** Sonia ROUSSE**<sup>d</sup>, **Mélina MACOUIN**<sup>d</sup>

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<sup>a</sup> : Université Norbert ZONGO, Département des Sciences de la Vie et de la Terre, Unité de Formation et de Recherche en Sciences et Technologies, BP 376 Koudougou, Burkina Faso

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<sup>b</sup> : Laboratoire Géosciences et Environnement (LaGE), Université Joseph KI-ZERBO, Département des sciences de la Terre, Unité de Formation et de Recherche en Sciences de la Vie et de la Terre, 03 BP 7021 Ouaga 03, Burkina Faso

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<sup>c</sup> : Ecole Normale Supérieure (ENS)/Institut Sciences et Technologies (IST), 01 BP 1757 Ouaga 01, Burkina Faso

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<sup>d</sup> : Laboratoire Géosciences Environnement Toulouse UMR 5563 & UR 234 IRD, Université Paul Sabatier, Avenue Edouard Belin 14, 31400 Toulouse, France.

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* **Correspondances:** Adama Ouédraogo YAMEOGO<sup>a*,b</sup>: ayameogofr@yahoo.fr, Téléphone : +22672473292

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**Abstract**

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The reconstitution of the geodynamic processes of the Eburnean orogeny in the time span around 2.1 Ga in Dori area is here carried out through the examination of the internal structures and microstructures of the Dori, Gorom-Gorom and Touka Bayèl granitic plutons. The radiometric ages of these plutons vary between 2164 Ma and 2148 Ma. The internal structures have been evidenced using the Anisotropy of Magnetic Susceptibility (AMS) method and the examination of microstructures through thin sections under optical microscope.

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The organization of the internal fabrics strongly suggests a diapiric emplacement for the Dori and the Touka Bayèl plutons in a still soften crust. The pluton of Gorom-Gorom seems to be constituted of four small plutons. Three of them, coalescent in the southern part, are emplaced by the diapirism and the fourth in the northern part can be interpreted as emplaced in a tension gash.
28 The overall disposition of the fabrics lets suggest a synchronous emplacement in accordance
29 with the dextral sense of the Tiébélé-Dori-Markoye (TDM) shear zone in a regional E-W
30 shortening context responsible of a crustal thickening.

31 The two emplacement mechanisms (diapirism and tension gash) identified through the internal
32 fabrics testify a rheological contrast of the crust during this early period of the Eburnean
33 Orogeny.

34 **Key words:** Burkina Faso, Paleoproterozoic/Eburnean, Plutons, magnetic fabrics,
35 microstructures, rheology

36 **1. Introduction**

37 The paleoproterozoic domain of the Man/Léo shield in the southern part of the West African
38 Craton is constituted of more or less narrow greenstones belts crosscut by granitoids' plutons
39 during the Eburnean orogeny. The magmatic and orogenic accretion processes seem to spread
40 out with some diachronism in this domain also called the Baoulé-Mossi domain (Grenholm et
41 al., 2019). The reconstitution of the geodynamic processes that prevailed during the Eburnean
42 orogeny and priorly is a subject of debate (Doumbia et al., 1998; Vidal et al., 2009; Lompo,
43 2010; Wane et al., 2018; Grenholm et al., 2019; Chardon et al., 2020; Traoré et al., 2022).

44 In all cases, the radiometric ages and the isotopic signatures of rocks confirm the juvenile
45 character of the Paleoproterozoic/birimian crust (Abouchami et al., 1990; Boher et al., 1992
46 Liégeois et al., 1991; Taylor et al., 1992; Doumbia et al., 1998; Gasquet et al., 2003; Pawlig et
47 al., 2006; Tapsoba et al., 2013; Para-Avila et al., 2016; Eglinger et al., 2017; Mériaud et al.,
48 2020). However, some segments of reworked pre-birimian crusts have been mentioned in the
49 centre of Côte d'Ivoire and in Ghana and are probably related to the genesis of certain granitoids
50 (Gasquet et al., 2003; Block et al., 2016; Petersson et al., 2016).

51 Granitoids are known to occupy an important volume in the Baoulé-Mossi domain. This
52 justifies the numerous studies with the aim to carry out their petrologic and geochemical
53 characters (Hirdes et al., 1996; Doumbia et al., 1998; Egal et al., 2002; Pawlig et al., 2006;
54 Tapsoba et al., 2013; Eglinger et al., 2017; Yaméogo et al., 2020). Granitoids are known to be
55 good markers of the crustal deformation and following this argument, other studies have been
56 focused on the characterization of the internal fabrics (foliations, lineations) in order to
57 reconstitute their emplacement mechanisms (Pons et al., 1992; Pons et al., 1995; Lompo et
al., 1995; Vidal et al., 1996; Naba et al., 2004; Vegas et al., 2008; Traoré et al., 2011; Sawadogo et al., 2018).

Since it is known that granitoids with the same geochemical characteristics can be emplaced
in different geodynamic contexts (Nédelec and Bouchez, 2011), highlighting the internal
structures of plutons is the best alternative to characterize the context at the time of their
emplacement.

The present study deal with the rheological context and emplacement mechanisms of the Dori,
Gorom-Gorom and Touka Bayèl granitic plutons (Fig. 1), through the analysis of internal
structures and microstructures. These granitoids, according to Tshibubudze et al. (2015), were
emplaced between 2164 and 2148 Ma, and are prior to the local D1 phase of the Eburnean
Orogeny.

The Baoulé-Mossi domain is known for his huge potential of gold mineralization and so the
majority of geological studies were first focused on the relationships between the gold
mineralization and the main phases of deformation of the Eburnean orogeny (Milesi et al., 1991;
Feybesse et al., 2006; Baratoux et al., 2015; Amponsah et al., 2016; Ouiya et al., 2016;
Tshibubudze and Hein, 2016; Woodman et al., 2016; Sawadogo et al., 2018 and references
therein). In many cases, gold mineralization occurs after the first phase of deformation namely
D1 (Milesi et al., 1989; Feybesse et al., 2006; Grenholm et al., 2019 and references therein).
Thus, the characterization of geodynamic context of the Baoulé-Mossi domain in term of
deformation during the period prior to the D1 event haven't been sufficiently discussed by the
previous studies. The recent radiometric ages on the rocks from the Oudalan-Gorouol belt and
the neighboring granitoids (Tshibubudze et al., 2015) shows that the emplacement age of the
Dori batholith is prior to D1 event in this locality.

The aim of the present study is to use the measurements of the Anisotropy of Magnetic Susceptibility coupled with the microstructures examinations in order established the geodynamical context of emplacement of these plutons and so participate to well characterized the style of deformation during the period which preceded D1 or Tangaean event after Hein, 2010 and Tshibubudze et al. (2013).

2. Regional geological setting
The studied area is located in the northeastern part of Burkina Faso in the Man/Leo shield (Fig. 2). In accordance with main lithologies of the Man/Leo shield, the studied area is constituted of granitoid that intruded metavolcanic and metasedimentary rocks. The metavolcanic and metasedimentary rocks constitute what is traditionally called Birimian greenstones belts and metasedimentary basins (Hirdes et al., 1996; Baratoux et al., 2011). The metavolcanics rocks with various natures are mainly metabasalts, metaandesits, metadacites, metarhydodacites and metarhyolites (Castaing et al., 2003; Lompo, 2010; Tapsoba et al., 2013). In the metasedimentary basins, the main rocks are shales, metapelites, metagreywackes with some intercalations of calk-alkaline metavolcanics rocks (Hirdes et al., 1996; Béziat et al., 2000 and references therein).

For the lithostratigraphic succession of the birimian series, it is now established that the bottom is occupied by the dominant métavolcanic unit while, the top is constituted by the dominant metasedimentary unit. The birimian series are overlain by the sediments from Tarkwaian group (Perrouty et al., 2012, Tshibubudze et al., 2015; Wane et al., 2018 and references therein).

Regarding to the geodynamical context of emplacement of the volcanic units some of the authors (Sylvester and Attoh, 1992; Ama Salah et al., 1996; Beziat et al., 2000; Soumaila et al., 2004; Dampare et al., 2008) propose an environment similar to those of present island arcs while the others (Abouchami et al., 1990; Boher et al., 1992; Pouclet et al., 1996; Lompo, 2009) propose an environment of oceanic plateaus with active mantle plumes.

The birimian greenstones belts and metasedimentary basins are crosscut by plutons of granitoids with various natures.

The emplacement of the granitoids is spread over a time interval of 68 Ma (2165 Ma to 2097 Ma) during the Eburnean Orogeny (Hirdes et al., 1996; Doumbia et al., 1998; Castaing et al., 2003; Tapsoba et al., 2013; Tshibubudze et al., 2013; Tshibubudze et al., 2015). According to Castaing et al. (2003); Naba et al. (2004); Yaméogo et al. (2020), two generations of granitoids have been distinguished. The first generation has some affinities with Archean TTG. At field scale, these granitoids are commonly foliated with iron-bearing silicates such as amphibole and biotite. The second generation is composed of apparently isotropic calc-alkaline to alkaline granitoid that content, according to Naba et al. (2004), only biotite as iron-bearing silicates.

As describe at many places in the Man/Leo shield, the Eburnean orogeny is characterized by regional metamorphism into the greenschist facies (Castaing et al., 2003; Feybesse et al., 2006; Baratoux et al., 2011 and references therein). Locally, the amphibolite facies is mentioned at
the contact of certain plutons (Debat et al., 2003; Soumaila et Garba, 2006) or along shear zones
(Chevremont et al., 2003). Using chemical analysis data on minerals and thermodynamic
models, Ganne et al. (2011) have shown that minerals such as chlorite and phengite from
Paleoproterozoic rocks of eastern Burkina Faso, Western Niger and the Kédougou-Kéniéba
inlier were formed at high pressures of 10–12 kbar, low temperatures of 400–450°C and under
a geothermal gradient of 10–12°C km⁻¹ and therefore are the marks of a modern-style plate
tectonics at this period.

Regarding the phases of deformations, the three main phases defined by Milési et al. (1989);
Feybesse et Milési (1994) and Feybesse et al. (2006) for the Eburnean orogeny, seem to not be
representative for the whole Baoulé-Mossi domain. A synthesis of available data from the
whole domain (Grenholm et al., 2019) shows that the orientations of the stresses, the ages and
the styles of deformation vary from one area to another.

In the northern region of Burkina Faso, Hein (2010) defined for the Goren belt the first phase
of deformation (D1) also called Tangaean event characterized by NE-SW compression which
is responsible of folding, reverse-dextral shear zones with NW to NNW trends and a penetrative
schistosity.

In the Oudalan-Gorouol belt, Tshibubudze et al. (2015) described the Tangaean event as
responsible of formation of certain branches of the Markoye shear zone. Western more, in the
Djibo belt, McCuaig et al. (2016) describe the D1 phase NNE-SSW oriented as responsible of
ESE fabric which is correlable with the Tangaean event of Hein (2010).

The Dori and Gorom-Gorom plutons, respectively of about 1092 km² and 1200 km², are
composed of biotite granite. The small pluton of Touka Bayèl, located south of the Gorom-
Gorom pluton with the same composition as the latter, seems to be an apophysis.

Through the petrographic and geochemical characterization of the Dori and Gorom-Gorom
plutons, Yameogo et al. (2020) shown that they have the same characters concerning their
macroscopic habitus and their majors, traces and rare earth elements contents. They are
metalumineous to peralumineous and highly potassic. According to the geotectonic diagrams,
the Dori and Gorom-Gorom plutons were emplaced in an active tectonic context which has the
same characteristic with nowadays subduction zones. The transcurrent shearing which controls
gold mineralization in the area (case of Essakane deposit) took place later after the emplacement
of these plutons.
150 Airborne geophysical data (BUMIGEB, 2015) and particularly the image of the analytical
151 signal of the total magnetic intensity shaded at 45° NW of the study area (Fig. 3) allow to
152 specify the cartographic limits of the plutons (Touka Bayèl, Dori and Gorom-Gorom). The
153 same image also allows to interpret all the major shears zones, faults and dykes that run
154 through the study area. Thus, between the Gorom-Gorom and Dori plutons, some of these
155 major shear zones, showing NNE-SSW to NE-SW orientation, are branches of the Tiébélé-
156 Dori-Markoye (TDM) shear zone also locally call the Markoye shear zone.

157 Some structures less longer than the major shear zone with mean NE strike seem to be
158 precocious and are largely disturbed (folded) near the northern contact of the Dori pluton. This
159 disturbance is probably due to the thermal effect related to emplacement of this pluton (Fig.
160 3). Late doleritic dykes, NW-SE oriented (Baratoux et al., 2019), that crosscut all petrographic
161 units are underlined by yellow on the Fig. 3.

162 **3. Methodology**

163 The fabric of the granitoids here studied was highlighted by measurements of the Anisotropy
164 of Magnetic Susceptibility (AMS) parameters. For these measurements, core sampling was
165 carried out using a portable drilling machine following a grid of 2 km x 2 km. On each
166 sampling station, at least, two cores with fifth to ten centimetres in length and spaced two to
167 ten meters are drilled. A total of 448 sampling stations have been performed in this study:
168 282 stations in granitic plutons (145 stations in Dori pluton, 136 stations in Gorom-Gorom
169 pluton and 34 stations in Touka Bayèl pluton) and 133 stations in the country rocks. The
170 sampling stations in the country rocks have been performed near the limits of the plutons in
171 order to appreciate the geometrical relationships between pluton internal fabrics and those of
172 the TTG basement. In the laboratory, each core is cut into at least two samples of
173 approximately spherical shape (diameter ≈ 25 mm and height ≈ 22 mm) for measurements of
174 the AMS. For a station, at least, four samples are subject to AMS measurements in order to
175 prove statistically the consistency of the mean values calculated in all cases. The rest of the
176 core is used for thin section for microstructure studies.

177 The AMS measurements were performed in the Laboratoire Géosciences et Environnement de
178 Toulouse (GET) using a susceptometer Kappabridge KLY-3-Agico operating under a weak
179 alternating field of 4 x 10⁻⁴ T, at a frequency of 920 Hz with a sensitivity of about 5 x 10⁻⁸ SI.
180 These measurements allow to access scalar and directional data of AMS ellipsoid. The three
axis of the ellipsoid namely K1≥ K2≥ K3 are coaxial with the axis of the ellipsoid of deformation (Bouchez et al., 1997). So, the magnetic lineation corresponds to K1 while K3 is the pole of the magnetic foliation.

The main scalar data provided by the AMS measurements are:

- Bulk susceptibility (Km) : $K_m = 1/3 (K_1 + K_2 + K_3)$

- Total anisotropy degree (P) : $P = K_1/K_3$

- The shape factor (T): $T = [\text{Log}(K_2/K_3) - \text{Log}(K_1/K_3)]/[\text{Log}(K_2/K_3) + \text{Log}(K_1/K_2)]$

The raw data have been computed using the Anisoft software of Agico which allow to calculate for each parameter the mean value of all the samples of the same sampling station and also allow to appreciate the more or less best grouping of directional data (lineations and foliations) via the statistics provides by the degree of confidence and the ellipse of confidence (see appendix).

For the microstructure studies, the thin sections have been performed and observed under optical microscope at the Laboratoire Géosciences et Environnement (LaGE) of Université Joseph KI-ZERBO.

In order to characterize the carriers of the ferromagnetic magnetization, the measurements of magnetic susceptibility versus temperature have been performed on a few numbers of samples having $K_m \ge 500 \times 10^{-6}$ SI units using the CS-3 apparatus coupled to the Kappabridge KLY-3.

Since the aeromagnetic data allow to access deep structures on non-outcropping areas, in this study, we used an image of already processed data by BUMIGEB (2015). This image obtained by processing total magnetic intensity (TMI) data with the OASIS MONTAJ software of GEOSOFT.

## 4. Results

### 4.1. Scalar data analysis

Up to now the proposed limits between magnetic susceptibilities dominated by the contributions of the paramagnetic particles and those dominated by the contributions of the ferromagnetic particles are based on empirical observations (Rochette, 1987; Bouchez, 1997; Trindade et al., 1999). When consider a magnetic susceptibility of $500 \times 10^{-6}$ SI units as a limit
209 between paramagnetic and ferromagnetic behaviours (Bouchez, 1997), in our case, the
210 ferromagnetic stations are dominant (Tables 1, 2, 3, 4 and Fig.4).

211 Measurements of magnetic susceptibility versus temperature have been performed in order to
212 carry out the nature of the particles responsible of the ferromagnetic behaviour.

213 The experimental graphs show a complete loss of magnetic susceptibility at a temperature of
214 580°C (Fig. 5). This temperature corresponds to the Curie temperature of magnetite and/or
215 titanomagnetite. When cooling the sample, the reconstitution of the magnetic susceptibility
216 begins at the same temperature but not reach to the same values before the heating. This mean
217 that the destabilized magnetite during the heating is not entirely reconstituted.

218 The range of the granitic plutons and their country rocks shape factor values are between -0.75
219 and 0.81 with a maximum of values between -0.5 and 0.5 (Tables 1, 2, 3, 4). The maximum of
220 the values between -0.5 and 0.5 mean that the fabric is overall plano-linear with predominantly
221 flattening (0 < T ≤ 0.81). Planar fabric stations are 75 % of the stations in the Dori pluton, 60
222 % of the stations in the Gorom-Gorom pluton and 50 % of the stations in the Touka Bayèl
223 pluton.

224 On the map views, the surfaces of all the plutons are almost entirely occupied by shape factors
225 more than 0 (oblate ellipsoids). The shape factors less than 0 (prolate ellipsoids), less numerous,
226 occurred as small surfaces randomly distribute (Fig. 6).

227 The total anisotropy degree varies from 1.02 to 1.44 for all the plutons. The values are less than
228 1.15 for 86.90 % of the sampling stations in the Dori pluton, 80.15 % of the sampling stations
229 in the Gorom-Gorom pluton and 58.82 % of the sampling stations in the Touka Bayèl pluton.
230 These values of the total anisotropy degree are low for magnetite-bearing granites. On the map
231 views, the surfaces of all the plutons are almost entirely occupied by anisotropy degree less
232 than 1.15. The total anisotropy degree more than 1.15, less numerous, are observed into small
233 surfaces randomly distribute (Fig. 7).

234 The graphs of P versus T show that there is no correlation between two parameters (Fig.8).

235 **4.2. Magnetic lineation**

236 The magnetic lineation in the Dori pluton is approximately oriented E-W and slightly arcade in
237 the Northern part of the pluton (Fig. 9a). The slightly to moderately plunging lineation (0° to
238 59°) represent 59 % of the stations, except in the southern half of the pluton where steeply
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plunging lineations (≥ 60°) cover more important surface. The lower hemisphere equal-area
projection diagram indicates that the mean line of the magnetic lineation within the pluton is
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241 288°/82° (Fig. 9b).

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In the Gorom-Gorom pluton, the slightly to moderately plunging magnetic lineation are more frequent (54 %). The steeply plunging magnetic lineation are observed in small clusters by location. The organization of the slightly to moderately plunging magnetic lineation is consistent by sector and allows to distinguish two sectors namely sectors A and B (Fig. 10a, b and c). On one hand, in the Sector A, the trends of the magnetic lineation are approximately oriented NE-SW with a mean line at 207°/75° (Fig. 10b). On the other hand, in the Sector B, the trends are roughly N-S with a mean line at 205°/57° (Fig. 10c).

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For the Touka Bayèl pluton (Fig. 10a), the moderately plunging lineations represent 94 % of the magnetic lineations and the lower hemisphere equal-area projection diagram indicates a mean orientation of the magnetic lineation at 224°/43° (Fig. 10d).

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The orientations of the slightly to moderately plunging magnetic lineations of the country rocks have an NNE-SSW average trend, especially near the Tiébélé-Dori-Markoye fault (Figs. 9 and 10) and secant on those of the granitic plutons.

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**4.3. Magnetic foliation**

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In biotite granite plutons and their country rocks, the magnetic foliation is steeply dipping (≥ 60°) for about 68 % of the stations.

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The nearby country rock magnetic foliation is approximately parallel to the granitic pluton contact and the internal foliation of Dori pluton (Fig. 11a).

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The internal pattern of the Dori pluton is concentric with a small core in the southeastern part and a slightly larger one in the southwestern part (Fig. 11a). The lower hemisphere equal-area projection diagram indicates that the mean pole of the magnetic foliation of the whole pluton is 167°/9° (Fig. 11b).

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The magnetic foliations of the country rock around of the Gorom-Gorom pluton are secant on the western border while to the east, it is partly controlled by the Tiébélé-Dori-Markoye fault which is oriented NE-SW (Fig. 12a).

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The organization of the internal magnetic foliations of this pluton is coherent into four sectors A, B₁, B₂ and B₃). In the sector A, the magnetic foliation trend is approximately E-W while in the three other sectors (B₁, B₂, and B₃), the patterns of the magnetic foliations are concentric similar to that observed in the Dori pluton (Fig. 12a). The lower hemisphere equal-area projection diagrams indicate that for the sectors A, B₁, B₂ and B₃, the means poles of the magnetic foliation are respectively 354°/14°, 24°/39°, 79°/16° and 103°/19° (Fig. 12b, c, d and e).

The magnetic foliations of the Touka Bayèl pluton have also concentric pattern with dominantly medium-dipping (Fig. 12a). The lower hemisphere equal-area projection diagram indicates a mean pole at 69°/49° (Fig. 12f)

## 4.4. Microstructures

In the biotite granites and their close country rocks, three types of microstructures are clearly distinguished : (i) magmatic microstructures in which the minerals are stable and unscathed from any deformation (Fig. 13a and b). This type of microstructure is well expressed and is largely predominant in biotite granites and their hosts rocks, (ii) high-temperature solid-state deformation microstructures which are essentially expressed by flexured plagioclases denoting that they were still softened at the moment of the deformation (Fig. 13c) and (iii) low-temperature deformation microstructures which are characterized by recrystallization of quartz crystals into sub-grains with poorly restored contours and highly marked rolling extinction (Fig. 13d). As expected, these last two microstructures are generally observed at the edge of the pluton or near the major shear zone.

The cartographic distribution of the microstructures in the three plutons and their close country rocks shows that the magmatic microstructures are abundant compared to the low temperature and high temperature deformation microstructures (Fig. 14a and b). Low-temperature deformation microstructures are observed in the country rocks along the major Tiébélé-Dori-Markoye shear zone. At the border of the Dori and Gorom-Gorom plutons, some microstructures express a continuum of deformation from high temperature to low temperature.

## 5. Discussion

The magnetic susceptibility values by station shows that ferromagnetic stations predominate both in biotite granites and in their TTG-country rocks. The carriers of the magnetization in this
case have been identified as magnetite and/or titano-magnetite (Vegas et al., 2008; Traore et al., 2011; Salazar et al., 2013).

The total anisotropy degree (P = K1/K3) in general is correlated with the rate of deformation. This is especially true for paramagnetic granitoids in which the contribution to the total anisotropy degree is dominated by the iron-bearing silicates (Archanjo et al., 1995; Bouchez, 1997; Gleizes et al, 1998; Bella Nke et al., 2022). In the ferromagnetic granitoids, the total anisotropy degree is mainly based on the shape fabric of the magnetite and evenly the anisotropy related to interactions between the magnetite grains due to their distribution in the rock (Gregoire et al., 1995; Gregoire et al., 1998). In this case, the total anisotropy degree doesn't reflect absolutely the rate of deformation (Archanjo et al., 1992; Bouchez, 1997; Naba et al., 2004; Sawadogo et al., 2018).

The values of the shape factor, between -0.75 and 0.81, are consistent with a plano-linear fabric with a slight predominance of the flattening since T > 0 in most of the cases. This suggests that both linear and planar fabrics are well expressed and indicates that flattening deformation was dominant.

The emplacement mechanisms of plutons still a matter of debate up to now (Clemens and Mawer, 1992; Karlstrom et al., 1993; Paterson and Fowler, 1993; Pons et al., 1995; Bouchez, 1997; Vegas et al., 2008; Nédélec and Bouchez, 2011; Njiki Chatué et al., 2020). In all cases the raw data that allow this kind of discussion are whole shapes of the plutonic intrusions (rounded or elongate) and especially their internal fabrics (foliations and lineations). Thus, the overall concentric fabrics centered on the pluton's core, parallel to it limits and to the fabrics of the country rocks might correspond to a diapiric body (Ramsay, 1989; Pons et al., 1995; Vegas et al., 2008). When the plutonic body is a result from magma ascent through fractures and their accumulation into a dilatational structures (Scaillet et al., 1995; Petford, 1996), the trends of the fabrics don't vary a lot over the surface of the whole pluton. Also, the fabrics of the pluton are not necessarily parallel to those of country rocks.

In all cases the rheology of country rocks at the moment of the emplacement determines the intrusion shape and the dispositions of it internal structures (Choukroune, 1995).
When regional stresses are actives at the moment of the emplacement, they may also control
partially the shape and the orientations of the internal fabrics (Bouchez, 1997; Nédélec and
Bouchez, 2011 and references therein).

For the present study, the directional data allowed to highlight the internal fabric of the plutons.
Indeed, in the Dori pluton as well as in sectors B₁, B₂ and B₃ of the Gorom-Gorom pluton and
the Touka Bayèl pluton, the concentric patterns of foliation trajectories are compatible with
inflation during magma ascent (Gleizes et al., 2006) and express a diapiric emplacement of
these plutons (Vegas et al., 2008; Njiki Chatué et al., 2020; Bella Nke et al., 2022). Sector A of
the Gorom-Gorom pluton is a large E-W oriented dyke (Scaillet et al., 1995; Petford, 1996).
Furthermore, the organization of the granitic pluton fabrics suggests that the large Gorom-
Gorom pluton is made up of small coalescent plutons whereas the Dori and Touka Bayèl plutons
are homogeneous bodies.

The slightly to moderately plunging magnetic lineations associated with steeply dipping
magnetic foliations reflect an interference between magmatic ascent and the regional stresses.
These lineations express therefore the finite stretch at least during the final increments of
magmatic strain (Bouchez, 1997). This observation is testified by the microstructures still
magmatic on many sampling stations. The steeply plunging lineations, which occupy more or
less well individualized clusters in the plutons, are interpreted as magma feeding zones
(Vigneresse and Bouchez, 1997; Naba et al., 2004; Vegas et al., 2008). For some stations on
the borders of the plutons, the fabric is clearly controlled by the regional deformation along the
shear zones since the microstructures there, are of solid state.

Except the parts reworked by the plutons inflation or overprint by the shear zones, the foliations
in the host rocks have NE-SW orientation.

The emplacement mechanisms evidenced on one hand through the magnetic foliation
trajectories and the trends and plunges of the lineations and other hand, from microstructures
studies show that some of the plutons were emplaced in a fairly softened crust while in the same
period the northern part of the Gorom-Gorom pluton was subject of a big tension gash at a
relatively high level in an already cooled crust. Such a contrasting rheological context for the
same geological environment, is a similar case that was argued by Pons et al. (1995) in western
Niger and Vegas et al. (2008) in eastern Burkina Faso.
The radiometric ages of Dori pluton (2164 Ma) and Gorom-Gorom pluton (2148 Ma) and those of the TTG host rocks, around 2210 to 2100 Ma (Castaing et al., 2003; Tshibubudze et al., 2015), can indicate that the time span of emplacement of the granitic plutons overlap that of the TTGs of the Dori area and so, may justify the still softening behaviour of the crust during the emplacement of biotite granite plutons.

In accordance with the range of the ages of the emplacement of the TTGs of whole Baoulé-Mossi domain (Parra-Avila et al., 2016; Parra-Avila et al., 2019; Masurel et al., 2021), we can consider that the granitoids of Dori area correspond to one of the older terranes since the latter granitoids (biotite granites here studied) of this area are older than the TTGs of the other areas.

The ages and the orientations of the D1 event of Eburnean orogeny vary from one locality to another (see synthesis in Grenholm, et al., 2019). The D1 event identified in the study area (Tshibubudze et al., 2013; Hein, 2010) is NE oriented and is supposed to last between 2130 and 2105 Ma. So, the emplacement of the Dori and Gorom-Gorom plutons which precede this D1, also called Tangaean event might correspond to the D₁-x or Pre-Tangaean phase of Hein, 2010.

In the present study, we clearly demonstrated through the orientations of fabrics from AMS measurements that the stresses during this D1-x or Pre-Tangaean event are E-W oriented and are later accommodated in a continuum of deformation by regional shear zones (e.g : some branches of the Tiébélé-Dori-Markoye shear zone).

The young Birimian crust was thin enough to undergo both rapid cooling and warming which allow the coexistence of vertical transfer of magmatic masses and transcurrent tectonics (Vegas et al., 2008). The following emplacement models (Fig. 14) can therefore be proposed for the Dori, Gorom-Gorom and Touka Bayèl plutons.

At the bottom of each block diagram, we can see the vertical ascent of the magma indicated by the red arrows. On the top of the block diagrams, we notice that the overall orientation of the fabrics are concentric for the sectors B₁, B₂, B₃ of the Gorom-Gorom pluton (Fig.14a), the Touka Bayèl pluton (Fig.14b) and Dori pluton (Fig.14c), reflecting an emplacement in a softened crust. The regular fabrics following an E-W trend in the northern part of the Gorom-Gorom pluton might reflect a fracture-like site of collection of the magma following the maximum stress orientation at the moment of the emplacement.
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After this stage and into a continuum of deformation, the regional shear zones affects some boundaries of the already emplaced plutons.

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**6. Conclusion**

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Through this study, we have shown that between 2200 Ma and 2100 Ma the rheology of the crust, in Dori area (Northeastern Burkina Faso), was quite contrasted, authorizing an emplacement of the magma according to two different mechanisms for the same environment: (i) diapirism for the Dori pluton, the Touka Bayèl pluton and the sectors B₁, B₂ and B₃ of the Gorom-Gorom pluton and (ii) along a big tension gash for the sector A of the Gorom-Gorom pluton.

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The emplacement of these granitic plutons in Dori area probably correspond to an early episode of the Eburnean orogeny. The regional tectonics of this period corresponds to an E-W shortening which was later accommodated by a regional transcurrent NE-SW dextral shearing. This study allows to understand the rheological context of the emplacement of the studied granitic plutons and brings new arguments on the tectonic style at this early period of the Eburnean orogeny.

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**ACKNOWLEDGMENTS:** This work was carried out with the financial support of the WAXI2 Program and the logistical support of the Institut de Recherche pour le Développement (IRD).

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650

651

652

## Tables' captions

653

Table 1: Location of stations and magnetic data of the TTG-type host rock

654

Table 2: Location of stations and magnetic data of the Dori granitic pluton

655

Table 3: Location of stations and magnetic data of the Gorom-Gorom granitic pluton

656

Table 4: Location of stations and magnetic data of the Touka Bayèl granite

657
<table><caption>Table 1</caption><thead><tr><th rowspan="2">Stations</th><th colspan="2">Coordinates</th><th colspan="4">Scalar data</th><th colspan="3">Directional data</th><th rowspan="2">Specimens numbers</th><th rowspan="2">Stations</th><th colspan="2">Coordinates</th><th colspan="4">Scalar data</th><th colspan="3">Directional data</th><th rowspan="2">Specimens numbers</th></tr><tr><th>Long./Lat.</th><th>Km (x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th><th>P</th><th>T</th><th>K1</th><th>K3</th><th>Long./Lat.</th><th>Km (x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th></tr></thead><tbody><tr><td>DO006</td><td>-0.07549/13.87887</td><td>52892.20</td><td>1.45</td><td>-0.23</td><td>69/11</td><td>256/56</td><td>5</td><td>DO152</td><td>-0.54352/14.08021</td><td>32930.31</td><td>1.17</td><td>-0.65</td><td>250/14</td><td>101/26</td><td>5</td><td>DO156</td><td>0.12472/13.85446</td><td>3004.83</td><td>1.07</td><td>0.44</td><td>31/65</td><td>264/70</td><td>5</td></tr><tr><td>DO007</td><td>-0.07188/13.84254</td><td>57704.04</td><td>1.64</td><td>0.20</td><td>322/19</td><td>320/83</td><td>5</td><td>DO156</td><td>0.12472/13.85446</td><td>3004.83</td><td>1.07</td><td>-0.65</td><td>250/14</td><td>101/26</td><td>5</td><td>DO157</td><td>0.07521/13.84762</td><td>198.28</td><td>1.07</td><td>-0.41</td><td>229/9</td><td>50/86</td><td>5</td></tr><tr><td>DO065</td><td>0.11759/14.01187</td><td>374.87</td><td>1.08</td><td>-0.31</td><td>263/42</td><td>100/72</td><td>6</td><td>DO157</td><td>0.07521/13.84762</td><td>198.28</td><td>1.07</td><td>-0.41</td><td>229/9</td><td>50/86</td><td>5</td><td>DO158</td><td>0.05960/13.83313</td><td>96.16</td><td>1.16</td><td>0.50</td><td>79/39</td><td>2/41</td><td>4</td></tr><tr><td>DO067</td><td>0.14420/14.09254</td><td>264.28</td><td>1.08</td><td>0.81</td><td>0/59</td><td>196/81</td><td>6</td><td>DO158</td><td>0.05960/13.83313</td><td>96.16</td><td>1.16</td><td>-0.41</td><td>229/9</td><td>50/86</td><td>5</td><td>DO166</td><td>-0.03989/13.83877</td><td>442.36</td><td>1.05</td><td>0.10</td><td>357/63</td><td>331/78</td><td>6</td></tr><tr><td>DO068</td><td>0.16073/14.08051</td><td>355.42</td><td>1.07</td><td>-0.01</td><td>276/74</td><td>168/85</td><td>6</td><td>DO166</td><td>-0.03989/13.83877</td><td>442.36</td><td>1.05</td><td>-0.41</td><td>229/9</td><td>50/86</td><td>5</td><td>DO167</td><td>-0.05852/13.85909</td><td>16712.14</td><td>1.38</td><td>0.05</td><td>257/22</td><td>256/82</td><td>8</td></tr><tr><td>DO069</td><td>0.17403/14.07472</td><td>235.22</td><td>1.04</td><td>0.29</td><td>290/73</td><td>202/73</td><td>6</td><td>DO167</td><td>-0.05852/13.85909</td><td>16712.14</td><td>1.38</td><td>-0.41</td><td>229/9</td><td>50/86</td><td>5</td><td>DO168</td><td>-0.06008/13.84831</td><td>15731.76</td><td>1.52</td><td>-0.13</td><td>296/53</td><td>262/67</td><td>6</td></tr><tr><td>DO070</td><td>0.15404/14.06570</td><td>312.61</td><td>1.09</td><td>0.59</td><td>259/64</td><td>189/65</td><td>6</td><td>DO168</td><td>-0.06008/13.84831</td><td>15731.76</td><td>1.52</td><td>-0.13</td><td>296/53</td><td>262/67</td><td>6</td><td>DO170</td><td>0.02032/13.83104</td><td>392.66</td><td>1.08</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>5</td></tr><tr><td>DO089</td><td>0.11936/14.03902</td><td>663.29</td><td>1.07</td><td>0.18</td><td>240/54</td><td>168/55</td><td>6</td><td>DO170</td><td>0.02032/13.83104</td><td>392.66</td><td>1.08</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO179</td><td>-0.05970/13.87679</td><td>28247.03</td><td>1.54</td><td>0.13</td><td>304/38</td><td>125/89</td><td>6</td></tr><tr><td>DO093</td><td>0.16641/13.99579</td><td>320.27</td><td>1.12</td><td>0.68</td><td>241/61</td><td>185/66</td><td>4</td><td>DO179</td><td>-0.05970/13.87679</td><td>28247.03</td><td>1.54</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO183</td><td>0.14507/13.87194</td><td>2692.85</td><td>1.08</td><td>-0.12</td><td>280/53</td><td>232/61</td><td>6</td></tr><tr><td>DO097</td><td>0.15056/14.10686</td><td>260.32</td><td>1.07</td><td>0.30</td><td>184/46</td><td>176/82</td><td>5</td><td>DO183</td><td>0.14507/13.87194</td><td>2692.85</td><td>1.08</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO184</td><td>0.16288/13.88650</td><td>202.67</td><td>1.12</td><td>0.19</td><td>28/69</td><td>354/77</td><td>6</td></tr><tr><td>DO098</td><td>0.16235/14.10786</td><td>286.42</td><td>1.06</td><td>0.34</td><td>296/66</td><td>160/73</td><td>6</td><td>DO184</td><td>0.16288/13.88650</td><td>202.67</td><td>1.12</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO186</td><td>0.11196/13.89601</td><td>1685.29</td><td>1.11</td><td>0.20</td><td>307/52</td><td>221/52</td><td>5</td></tr><tr><td>DO099</td><td>0.14942/14.12179</td><td>282.42</td><td>1.06</td><td>0.42</td><td>151/63</td><td>143/86</td><td>5</td><td>DO186</td><td>0.11196/13.89601</td><td>1685.29</td><td>1.11</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO187</td><td>0.11631/13.90680</td><td>528.75</td><td>1.04</td><td>0.17</td><td>276/48</td><td>254/71</td><td>6</td></tr><tr><td>DO100</td><td>0.12888/14.12143</td><td>1177.57</td><td>1.06</td><td>0.52</td><td>176/59</td><td>148/75</td><td>6</td><td>DO187</td><td>0.11631/13.90680</td><td>528.75</td><td>1.04</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO188</td><td>0.12912/13.91068</td><td>1958.51</td><td>1.19</td><td>0.46</td><td>270/42</td><td>246/66</td><td>6</td></tr><tr><td>DO110</td><td>0.02993/14.18669</td><td>3388.18</td><td>1.22</td><td>0.22</td><td>81/3</td><td>261/86</td><td>5</td><td>DO188</td><td>0.12912/13.91068</td><td>1958.51</td><td>1.19</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO191</td><td>0.18050/13.90969</td><td>68.92</td><td>1.13</td><td>0.04</td><td>357/0</td><td>357/13</td><td>5</td></tr><tr><td>DO112</td><td>0.04806/14.20569</td><td>205.73</td><td>1.09</td><td>-0.02</td><td>120/54</td><td>113/85</td><td>4</td><td>DO191</td><td>0.18050/13.90969</td><td>68.92</td><td>1.13</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO192</td><td>0.18339/13.92703</td><td>174.91</td><td>1.08</td><td>0.11</td><td>179/3</td><td>0/74</td><td>5</td></tr><tr><td>DO116</td><td>-0.07181/14.22317</td><td>5513.33</td><td>1.04</td><td>-0.12</td><td>135/52</td><td>80/57</td><td>5</td><td>DO192</td><td>0.18339/13.92703</td><td>174.91</td><td>1.08</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO193</td><td>0.16993/13.92600</td><td>100.98</td><td>1.21</td><td>0.49</td><td>20/25</td><td>356/48</td><td>8</td></tr><tr><td>DO117</td><td>-0.31781/14.02084</td><td>1383.22</td><td>1.22</td><td>-0.41</td><td>257/58</td><td>211/66</td><td>5</td><td>DO193</td><td>0.16993/13.92600</td><td>100.98</td><td>1.21</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO195</td><td>0.12547/13.92830</td><td>455.21</td><td>1.09</td><td>0.49</td><td>242/50</td><td>212/67</td><td>6</td></tr><tr><td>DO118</td><td>-0.41852/14.01905</td><td>361.28</td><td>1.02</td><td>-0.07</td><td>186/40</td><td>185/89</td><td>5</td><td>DO195</td><td>0.12547/13.92830</td><td>455.21</td><td>1.09</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO200</td><td>0.14246/13.94733</td><td>993.77</td><td>1.30</td><td>0.68</td><td>259/68</td><td>189/69</td><td>5</td></tr><tr><td>DO119</td><td>-0.43690/14.01911</td><td>125.59</td><td>1.19</td><td>0.05</td><td>258/72</td><td>186/74</td><td>4</td><td>DO200</td><td>0.14246/13.94733</td><td>993.77</td><td>1.30</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO202</td><td>0.18024/13.94565</td><td>205.11</td><td>1.08</td><td>0.76</td><td>111/25</td><td>24/29</td><td>4</td></tr><tr><td>DO122</td><td>-0.54027/14.05817</td><td>372.05</td><td>1.07</td><td>-0.08</td><td>248/31</td><td>139/35</td><td>4</td><td>DO202</td><td>0.18024/13.94565</td><td>205.11</td><td>1.08</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO204</td><td>0.13969/13.95283</td><td>409.40</td><td>1.16</td><td>0.59</td><td>267/60</td><td>201/62</td><td>6</td></tr><tr><td>DO132</td><td>-0.06403/14.23791</td><td>5427.23</td><td>1.05</td><td>0.51</td><td>256/52</td><td>6/87</td><td>6</td><td>DO204</td><td>0.13969/13.95283</td><td>409.40</td><td>1.16</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO205</td><td>0.12137/14.01434</td><td>44.24</td><td>1.14</td><td>-0.19</td><td>293/45</td><td>217/46</td><td>6</td></tr><tr><td>DO135</td><td>-0.12507/14.33632</td><td>16513.47</td><td>1.70</td><td>-0.31</td><td>265/49</td><td>237/69</td><td>4</td><td>DO205</td><td>0.12137/14.01434</td><td>44.24</td><td>1.14</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td>DO220</td><td>0.11238/14.11981</td><td>174.61</td><td>1.09</td><td>0.75</td><td>150/72</td><td>342/86</td><td>6</td></tr><tr><td>DO142</td><td>-0.22064/14.12579</td><td>121081.47</td><td>1.20</td><td>0.68</td><td>296/67</td><td>296/90</td><td>5</td><td>DO220</td><td>0.11238/14.11981</td><td>174.61</td><td>1.09</td><td>-0.34</td><td>349/70</td><td>222/74</td><td>6</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>
<table>
  <tbody>
    <tr>
      <td>DO144</td>
      <td>-0.33016/14.01690</td>
      <td>69.33</td>
      <td>1.07</td>
      <td>0.01</td>
      <td>249/61</td>
      <td>198/68</td>
      <td>4</td>
      <td>DO221</td>
      <td>0.11312/14.14534</td>
      <td>293.59</td>
      <td>1.07</td>
      <td>0.19</td>
      <td>105/59</td>
      <td>315/73</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO146</td>
      <td>-0.51399/14.03944</td>
      <td>3150.55</td>
      <td>1.22</td>
      <td>-0.64</td>
      <td>245/48</td>
      <td>180/53</td>
      <td>4</td>
      <td>DO222</td>
      <td>0.09692/14.15240</td>
      <td>258.71</td>
      <td>1.05</td>
      <td>-0.43</td>
      <td>59/77</td>
      <td>5/79</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO229</td>
      <td>-0.03286/14.15918</td>
      <td>316.01</td>
      <td>1.08</td>
      <td>0.25</td>
      <td>170/54</td>
      <td>357/85</td>
      <td>5</td>
      <td>DO373</td>
      <td>-0.16241/14.34357</td>
      <td>3225.00</td>
      <td>1.16</td>
      <td>0.10</td>
      <td>273/59</td>
      <td>170/61</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO231</td>
      <td>0.05722/14.18897</td>
      <td>349.45</td>
      <td>1.07</td>
      <td>0.09</td>
      <td>96/63</td>
      <td>301/77</td>
      <td>6</td>
      <td>DO376</td>
      <td>-0.18105/14.31142</td>
      <td>8798.84</td>
      <td>1.18</td>
      <td>-0.11</td>
      <td>264/64</td>
      <td>153/65</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO232</td>
      <td>0.09204/14.15946</td>
      <td>278.76</td>
      <td>1.10</td>
      <td>0.53</td>
      <td>145/83</td>
      <td>349/87</td>
      <td>5</td>
      <td>DO377</td>
      <td>-0.17389/14.30283</td>
      <td>783.03</td>
      <td>1.19</td>
      <td>0.30</td>
      <td>289/67</td>
      <td>152/74</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO233</td>
      <td>-0.11115/13.84429</td>
      <td>24421.69</td>
      <td>1.24</td>
      <td>-0.22</td>
      <td>296/30</td>
      <td>291/80</td>
      <td>5</td>
      <td>DO378</td>
      <td>-0.16193/14.30952</td>
      <td>1523.17</td>
      <td>1.18</td>
      <td>0.30</td>
      <td>254/66</td>
      <td>145/67</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO234</td>
      <td>-0.09352/13.84343</td>
      <td>24644.54</td>
      <td>1.42</td>
      <td>0.16</td>
      <td>300/24</td>
      <td>292/74</td>
      <td>5</td>
      <td>DO379</td>
      <td>-0.16894/14.32453</td>
      <td>4419.30</td>
      <td>1.17</td>
      <td>-0.13</td>
      <td>256/63</td>
      <td>242/83</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO235</td>
      <td>-0.11487/13.86052</td>
      <td>20970.64</td>
      <td>1.28</td>
      <td>0.14</td>
      <td>145/41</td>
      <td>327/87</td>
      <td>6</td>
      <td>DO380</td>
      <td>-0.12740/14.29711</td>
      <td>1584.15</td>
      <td>1.25</td>
      <td>-0.45</td>
      <td>198/70</td>
      <td>48/80</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO239</td>
      <td>-0.08071/14.11044</td>
      <td>212.16</td>
      <td>1.03</td>
      <td>-0.31</td>
      <td>60/48</td>
      <td>256/76</td>
      <td>6</td>
      <td>DO381</td>
      <td>-0.14384/14.28967</td>
      <td>6844.73</td>
      <td>1.20</td>
      <td>0.21</td>
      <td>295/80</td>
      <td>186/80</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO243</td>
      <td>-0.09392/14.08271</td>
      <td>287.85</td>
      <td>1.07</td>
      <td>-0.29</td>
      <td>15/31</td>
      <td>205/75</td>
      <td>5</td>
      <td>DO382</td>
      <td>-0.14377/14.31310</td>
      <td>5627.29</td>
      <td>1.24</td>
      <td>-0.65</td>
      <td>230/54</td>
      <td>86/67</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO245</td>
      <td>-0.11182/14.08469</td>
      <td>281.59</td>
      <td>1.05</td>
      <td>0.06</td>
      <td>88/56</td>
      <td>49/67</td>
      <td>6</td>
      <td>DO383</td>
      <td>-0.12507/14.31164</td>
      <td>162.53</td>
      <td>1.25</td>
      <td>-0.63</td>
      <td>277/75</td>
      <td>189/75</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO253'</td>
      <td>-0.13260/13.96979</td>
      <td>656.34</td>
      <td>1.08</td>
      <td>0.20</td>
      <td>73/55</td>
      <td>45/72</td>
      <td>7</td>
      <td>DO384</td>
      <td>-0.14377/14.32436</td>
      <td>21105.70</td>
      <td>1.41</td>
      <td>0.40</td>
      <td>286/75</td>
      <td>123/85</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO265</td>
      <td>-0.19687/13.93478</td>
      <td>1443.11</td>
      <td>1.06</td>
      <td>0.17</td>
      <td>260/13</td>
      <td>255/32</td>
      <td>4</td>
      <td>DO387</td>
      <td>-0.11699/14.34472</td>
      <td>17026.79</td>
      <td>1.41</td>
      <td>-0.07</td>
      <td>262/51</td>
      <td>171/51</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO266</td>
      <td>-0.14770/13.91120</td>
      <td>65237.15</td>
      <td>1.94</td>
      <td>-0.28</td>
      <td>85/70</td>
      <td>343/70</td>
      <td>5</td>
      <td>DO388</td>
      <td>-0.47862/14.27892</td>
      <td>1026.39</td>
      <td>1.23</td>
      <td>0.20</td>
      <td>249/2</td>
      <td>247/40</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO267</td>
      <td>-0.15204/13.89663</td>
      <td>40591.13</td>
      <td>1.90</td>
      <td>0.11</td>
      <td>57/75</td>
      <td>248/87</td>
      <td>5</td>
      <td>DO389</td>
      <td>-0.46016/14.24986</td>
      <td>6332.92</td>
      <td>1.17</td>
      <td>-0.06</td>
      <td>264/68</td>
      <td>139/74</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO268</td>
      <td>-0.13544/13.91355</td>
      <td>58443.73</td>
      <td>1.83</td>
      <td>-0.25</td>
      <td>269/76</td>
      <td>224/72</td>
      <td>6</td>
      <td>DO390</td>
      <td>-0.46236/14.25903</td>
      <td>1805.95</td>
      <td>1.28</td>
      <td>0.65</td>
      <td>178/61</td>
      <td>143/72</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO272</td>
      <td>-0.09513/13.90040</td>
      <td>25110.23</td>
      <td>1.73</td>
      <td>0.19</td>
      <td>62/83</td>
      <td>306/84</td>
      <td>4</td>
      <td>DO391</td>
      <td>-0.45859/14.27928</td>
      <td>1612.04</td>
      <td>1.15</td>
      <td>-0.26</td>
      <td>172/69</td>
      <td>63/70</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO273</td>
      <td>-0.11191/13.91201</td>
      <td>54625.06</td>
      <td>1.89</td>
      <td>-0.10</td>
      <td>68/73</td>
      <td>282/80</td>
      <td>5</td>
      <td>DO392</td>
      <td>-0.44671/14.28126</td>
      <td>1834.11</td>
      <td>1.14</td>
      <td>-0.04</td>
      <td>164/80</td>
      <td>17/85</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO307</td>
      <td>-0.18049/14.46131</td>
      <td>9167.26</td>
      <td>1.25</td>
      <td>-0.09</td>
      <td>102/13</td>
      <td>99/83</td>
      <td>4</td>
      <td>DO393</td>
      <td>-0.44260/14.26056</td>
      <td>3679.03</td>
      <td>1.15</td>
      <td>-0.14</td>
      <td>192/71</td>
      <td>188/89</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO311</td>
      <td>-0.32212/14.40571</td>
      <td>12104.60</td>
      <td>1.20</td>
      <td>-0.40</td>
      <td>44/69</td>
      <td>333/70</td>
      <td>4</td>
      <td>DO411</td>
      <td>-0.44968/14.31503</td>
      <td>373.91</td>
      <td>1.09</td>
      <td>0.24</td>
      <td>199/41</td>
      <td>44/64</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO312</td>
      <td>-0.35472/14.39860</td>
      <td>66.33</td>
      <td>1.02</td>
      <td>-0.20</td>
      <td>197/1</td>
      <td>17/85</td>
      <td>5</td>
      <td>DO417</td>
      <td>-0.18465/14.44160</td>
      <td>6250.62</td>
      <td>1.10</td>
      <td>0.18</td>
      <td>74/64</td>
      <td>348/66</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO326</td>
      <td>-0.19400/14.46296</td>
      <td>9355.03</td>
      <td>1.32</td>
      <td>-0.08</td>
      <td>88/1</td>
      <td>87/47</td>
      <td>5</td>
      <td>DO429</td>
      <td>-0.20160/14.23782</td>
      <td>332.68</td>
      <td>1.16</td>
      <td>-0.25</td>
      <td>262/47</td>
      <td>206/52</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO327</td>
      <td>-0.21794/14.45411</td>
      <td>6701.94</td>
      <td>1.41</td>
      <td>0.06</td>
      <td>275/11</td>
      <td>105/47</td>
      <td>6</td>
      <td>DO430</td>
      <td>-0.19884/14.25771</td>
      <td>1772.68</td>
      <td>1.21</td>
      <td>-0.15</td>
      <td>281/59</td>
      <td>202/59</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO328</td>
      <td>-0.28920/14.44557</td>
      <td>5549.59</td>
      <td>1.19</td>
      <td>0.70</td>
      <td>249/22</td>
      <td>99/40</td>
      <td>5</td>
      <td>DO431</td>
      <td>-0.18014/14.28115</td>
      <td>5744.89</td>
      <td>1.31</td>
      <td>-0.08</td>
      <td>280/35</td>
      <td>133/53</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO330</td>
      <td>-0.40269/14.43764</td>
      <td>20776.25</td>
      <td>1.13</td>
      <td>-0.07</td>
      <td>20/58</td>
      <td>0/78</td>
      <td>5</td>
      <td>DO433</td>
      <td>-0.19160/14.25265</td>
      <td>226.56</td>
      <td>1.08</td>
      <td>-0.05</td>
      <td>288/40</td>
      <td>186/40</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO331</td>
      <td>-0.41699/14.44286</td>
      <td>14080.23</td>
      <td>1.09</td>
      <td>0.02</td>
      <td>66/72</td>
      <td>12/75</td>
      <td>5</td>
      <td>DO434</td>
      <td>-0.17853/14.23728</td>
      <td>3869.96</td>
      <td>1.06</td>
      <td>-0.75</td>
      <td>249/34</td>
      <td>78/78</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO339</td>
      <td>-0.49143/14.31109</td>
      <td>4247.33</td>
      <td>1.39</td>
      <td>-0.10</td>
      <td>199/64</td>
      <td>172/77</td>
      <td>4</td>
      <td>DO435</td>
      <td>-0.16359/14.23914</td>
      <td>58.03</td>
      <td>1.15</td>
      <td>0.38</td>
      <td>255/57</td>
      <td>165/57</td>
      <td>4</td>
    </tr>
  </tbody>
</table>
<table><tr><td>DO340</td><td>-0.45857/14.29676</td><td>1650.82</td><td>1.25</td><td>0.55</td><td>246/28</td><td>223/59</td><td>4</td><td>DO436</td><td>-0.16193/14.27109</td><td>5262.71</td><td>1.18</td><td>0.16</td><td>304/41</td><td>213/41</td><td>4</td></tr><tr><td>DO372</td><td>-0.18732/14.29283</td><td>1069.69</td><td>1.09</td><td>-0.51</td><td>258/56</td><td>168/56</td><td>6</td><td>DO437</td><td>-0.18967/14.27640</td><td>672.04</td><td>1.20</td><td>0.46</td><td>269/67</td><td>206/69</td><td>6</td></tr><tr><td>DO438</td><td>-0.12858/14.27650</td><td>4807.43</td><td>1.30</td><td>0.29</td><td>235/56</td><td>191/65</td><td>5</td><td>DO483</td><td>-0.49114/14.01994</td><td>1355.55</td><td>1.10</td><td>-0.49</td><td>285/61</td><td>202/61</td><td>6</td></tr><tr><td>DO439</td><td>-0.14621/14.24885</td><td>6886.97</td><td>1.26</td><td>0.30</td><td>271/36</td><td>224/44</td><td>4</td><td>DO484</td><td>-0.48964/14.01198</td><td>2646.17</td><td>1.30</td><td>0.36</td><td>244/48</td><td>201/60</td><td>4</td></tr><tr><td>DO440</td><td>-0.15228/14.23896</td><td>7389.71</td><td>1.41</td><td>-0.01</td><td>293/61</td><td>192/62</td><td>5</td><td>DO485</td><td>-0.46278/14.01161</td><td>1381.26</td><td>1.10</td><td>0.15</td><td>307/50</td><td>171/59</td><td>5</td></tr><tr><td>DO443</td><td>-0.07457/14.25051</td><td>1353.40</td><td>1.07</td><td>-0.03</td><td>131/24</td><td>118/47</td><td>4</td><td>DO495</td><td>-0.46196/14.11876</td><td>4230.94</td><td>1.36</td><td>0.23</td><td>222/40</td><td>218/86</td><td>5</td></tr><tr><td>DO447</td><td>-0.15871/14.18695</td><td>7797.94</td><td>1.16</td><td>0.15</td><td>221/48</td><td>147/49</td><td>5</td><td>DO498</td><td>-0.45677/14.14730</td><td>9463.61</td><td>1.16</td><td>-0.33</td><td>219/36</td><td>60/64</td><td>4</td></tr><tr><td>DO448</td><td>-0.23558/14.20584</td><td>2103.28</td><td>1.14</td><td>-0.52</td><td>237/45</td><td>207/63</td><td>5</td><td>DO499</td><td>-0.48035/14.15374</td><td>4384.27</td><td>1.17</td><td>-0.35</td><td>212/44</td><td>90/49</td><td>6</td></tr><tr><td>DO449</td><td>-0.20279/14.20782</td><td>9958.43</td><td>1.24</td><td>-0.44</td><td>250/48</td><td>175/49</td><td>5</td><td>DO500</td><td>-0.46513/14.17176</td><td>803.97</td><td>1.05</td><td>0.01</td><td>208/58</td><td>182/74</td><td>5</td></tr><tr><td>DO450</td><td>-0.18713/14.20475</td><td>10819.98</td><td>1.27</td><td>-0.03</td><td>265/36</td><td>248/70</td><td>4</td><td>DO501</td><td>-0.44741/14.17020</td><td>4483.33</td><td>1.11</td><td>-0.04</td><td>245/38</td><td>140/39</td><td>5</td></tr><tr><td>DO451</td><td>-0.20008/14.21964</td><td>3003.29</td><td>1.15</td><td>-0.60</td><td>264/15</td><td>256/62</td><td>5</td><td>DO508</td><td>-0.36310/14.13710</td><td>2287.78</td><td>1.23</td><td>0.49</td><td>48/6</td><td>31/20</td><td>5</td></tr><tr><td>DO452</td><td>-0.25300/14.20552</td><td>222.10</td><td>1.07</td><td>-0.16</td><td>270/35</td><td>152/39</td><td>4</td><td>DO518</td><td>-0.39413/14.07950</td><td>571.89</td><td>1.14</td><td>-0.22</td><td>115/41</td><td>21/41</td><td>6</td></tr><tr><td>DO455'</td><td>-0.46247/14.13541</td><td>720.99</td><td>1.16</td><td>0.14</td><td>314/13</td><td>137/52</td><td>4</td><td>DO534</td><td>-0.21632/14.15085</td><td>9758.12</td><td>1.24</td><td>-0.42</td><td>269/19</td><td>249/45</td><td>5</td></tr><tr><td>DO478</td><td>-0.50011/14.21112</td><td>809.88</td><td>1.11</td><td>0.18</td><td>204/39</td><td>167/53</td><td>6</td><td>DO535</td><td>-0.19402/14.14965</td><td>2346.03</td><td>1.18</td><td>-0.02</td><td>270/41</td><td>251/72</td><td>4</td></tr><tr><td>DO479</td><td>-0.46715/14.21115</td><td>1712.59</td><td>1.13</td><td>-0.35</td><td>129/51</td><td>311/90</td><td>4</td><td>DO536</td><td>-0.17757/14.16387</td><td>7235.33</td><td>1.20</td><td>-0.78</td><td>272/73</td><td>232/83</td><td>4</td></tr><tr><td>DO480</td><td>-0.48066/14.18863</td><td>7322.04</td><td>1.19</td><td>-0.21</td><td>244/3</td><td>90/7</td><td>6</td><td>DO537</td><td>-0.16609/14.17174</td><td>5734.49</td><td>1.18</td><td>-0.70</td><td>257/60</td><td>98/78</td><td>5</td></tr><tr><td>DO481</td><td>-0.49540/14.11114</td><td>209.24</td><td>1.05</td><td>-0.16</td><td>195/54</td><td>30/80</td><td>4</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
<table><caption>Table 2</caption><thead><tr><th rowspan="2">Stations</th><th rowspan="2">Coordinates<br>Long./Lat.</th><th colspan="4">Scalar data</th><th colspan="2">Directional data</th><th rowspan="2">Specimens<br>numbers</th><th rowspan="2">Stations</th><th rowspan="2">Coordinates<br>Long./Lat.</th><th colspan="4">Scalar data</th><th colspan="2">Directional data</th><th rowspan="2">Specimens<br>numbers</th></tr><tr><th>Km<br>(x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th><th>Km<br>(x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th></tr></thead><tbody><tr><td>DO001</td><td>-0.02523/13.99798</td><td>931.10</td><td>1.11</td><td>0.32</td><td>50/33</td><td>280/43</td><td>4</td><td>DO030</td><td>0.01740/14.03609</td><td>897.27</td><td>1.08</td><td>0.37</td><td>68/61</td><td>285/71</td><td>5</td></tr><tr><td>DO002</td><td>-0.01497/14.02448</td><td>1098.11</td><td>1.17</td><td>0.07</td><td>35/72</td><td>267/76</td><td>4</td><td>DO031</td><td>0.03430/14.01497</td><td>1157.91</td><td>1.09</td><td>-0.05</td><td>16/57</td><td>312/59</td><td>6</td></tr><tr><td>DO003</td><td>-0.03763/13.97857</td><td>2688.42</td><td>1.10</td><td>-0.23</td><td>57/31</td><td>310/32</td><td>4</td><td>DO032</td><td>-0.01418/13.99084</td><td>503.84</td><td>1.07</td><td>0.63</td><td>87/38</td><td>324/43</td><td>6</td></tr><tr><td>DO004</td><td>-0.05135/13.97031</td><td>825.28</td><td>1.15</td><td>0.10</td><td>57/46</td><td>253/14</td><td>4</td><td>DO033</td><td>-0.00650/13.99144</td><td>328.18</td><td>1.05</td><td>0.35</td><td>64/47</td><td>285/59</td><td>4</td></tr><tr><td>DO005</td><td>-0.05272/13.95076</td><td>852.83</td><td>1.13</td><td>0.44</td><td>288/82</td><td>241/84</td><td>4</td><td>DO034</td><td>0.00017/13.97012</td><td>2728.99</td><td>1.38</td><td>0.11</td><td>188/73</td><td>115/73</td><td>5</td></tr><tr><td>DO009</td><td>-0.01827/14.02099</td><td>90.92</td><td>1.04</td><td>0.51</td><td>89/24</td><td>244/59</td><td>5</td><td>DO035</td><td>-0.02944/13.97024</td><td>1593.22</td><td>1.14</td><td>0.43</td><td>268/79</td><td>89/90</td><td>4</td></tr><tr><td>DO010</td><td>-0.00040/14.02221</td><td>819.79</td><td>1.11</td><td>0.37</td><td>99/73</td><td>292/86</td><td>5</td><td>DO036</td><td>-0.01659/13.94722</td><td>877.57</td><td>1.05</td><td>0.51</td><td>233/26</td><td>222/69</td><td>4</td></tr><tr><td>DO011</td><td>0.00554/14.00357</td><td>1294.86</td><td>1.11</td><td>0.15</td><td>64/73</td><td>310/74</td><td>5</td><td>DO037</td><td>-0.01561/13.93270</td><td>337.50</td><td>1.23</td><td>0.26</td><td>5/69</td><td>221/77</td><td>9</td></tr><tr><td>DO012</td><td>0.01755/14.02177</td><td>2596.80</td><td>1.07</td><td>0.33</td><td>61/50</td><td>278/63</td><td>5</td><td>DO038</td><td>-0.00033/13.92948</td><td>266.88</td><td>1.09</td><td>0.43</td><td>245/36</td><td>244/89</td><td>5</td></tr><tr><td>DO014</td><td>0.01808/14.00277</td><td>2147.36</td><td>1.12</td><td>-0.32</td><td>95/50</td><td>332/54</td><td>6</td><td>DO039</td><td>-0.00082/13.91510</td><td>1873.64</td><td>1.14</td><td>0.04</td><td>51/85</td><td>61/80</td><td>4</td></tr><tr><td>DO015</td><td>0.03426/14.00607</td><td>2171.55</td><td>1.07</td><td>-0.10</td><td>44/21</td><td>245/47</td><td>6</td><td>DO040</td><td>-0.05045/14.03787</td><td>442.83</td><td>1.06</td><td>-0.03</td><td>73/45</td><td>58/76</td><td>5</td></tr><tr><td>DO016</td><td>0.04112/13.98977</td><td>1810.73</td><td>1.08</td><td>0.16</td><td>37/11</td><td>10/34</td><td>4</td><td>DO041</td><td>0.00025/13.94904</td><td>378.82</td><td>1.09</td><td>0.38</td><td>204/82</td><td>123/82</td><td>5</td></tr><tr><td>DO017</td><td>0.04867/13.98536</td><td>256.74</td><td>1.05</td><td>0.42</td><td>295/6</td><td>289/42</td><td>5</td><td>DO042</td><td>0.01794/13.95267</td><td>3770.25</td><td>1.09</td><td>-0.25</td><td>326/77</td><td>257/77</td><td>5</td></tr><tr><td>DO018</td><td>0.05407/13.96787</td><td>5011.62</td><td>1.12</td><td>0.06</td><td>20/18</td><td>232/31</td><td>5</td><td>DO043</td><td>0.03632/13.94356</td><td>2348.22</td><td>1.19</td><td>-0.19</td><td>259/70</td><td>181/71</td><td>6</td></tr><tr><td>DO019</td><td>0.07034/13.96610</td><td>198.78</td><td>1.04</td><td>-0.28</td><td>259/53</td><td>139/53</td><td>6</td><td>DO044</td><td>0.03040/13.93318</td><td>1080.90</td><td>1.07</td><td>-0.25</td><td>34/82</td><td>229/88</td><td>5</td></tr><tr><td>DO020</td><td>0.05532/13.94726</td><td>1719.30</td><td>1.16</td><td>0.29</td><td>303/67</td><td>198/67</td><td>5</td><td>DO045</td><td>0.07948/13.98645</td><td>785.92</td><td>1.14</td><td>0.20</td><td>215/62</td><td>146/63</td><td>5</td></tr><tr><td>DO021</td><td>0.05229/13.93260</td><td>721.46</td><td>1.09</td><td>0.01</td><td>342/68</td><td>185/81</td><td>5</td><td>DO046</td><td>-0.05610/14.02120</td><td>475.28</td><td>1.10</td><td>0.12</td><td>49/54</td><td>262/68</td><td>5</td></tr><tr><td>DO022</td><td>-0.03171/13.99602</td><td>482.53</td><td>1.08</td><td>0.15</td><td>330/46</td><td>294/59</td><td>4</td><td>DO047</td><td>-0.07178/14.01784</td><td>405.75</td><td>1.08</td><td>0.69</td><td>308/35</td><td>271/47</td><td>4</td></tr><tr><td>DO023</td><td>0.07126/13.94896</td><td>779.14</td><td>1.09</td><td>0.54</td><td>101/64</td><td>44/68</td><td>6</td><td>DO048</td><td>-0.07314/14.00365</td><td>411.86</td><td>1.06</td><td>0.43</td><td>251/17</td><td>249/86</td><td>4</td></tr><tr><td>DO024</td><td>0.07069/13.93244</td><td>290.75</td><td>1.11</td><td>0.13</td><td>278/55</td><td>237/65</td><td>6</td><td>DO049</td><td>-0.05330/14.00480</td><td>2368.53</td><td>1.13</td><td>0.11</td><td>54/39</td><td>300/42</td><td>5</td></tr><tr><td>DO025</td><td>0.06692/13.91473</td><td>1146.05</td><td>1.13</td><td>0.49</td><td>257/54</td><td>228/72</td><td>4</td><td>DO050</td><td>-0.07530/13.96611</td><td>318.80</td><td>1.06</td><td>0.18</td><td>327/62</td><td>216/68</td><td>4</td></tr><tr><td>DO026</td><td>0.07567/13.89181</td><td>296.67</td><td>1.07</td><td>0.04</td><td>301/72</td><td>221/73</td><td>5</td><td>DO051</td><td>-0.07546/13.94824</td><td>989.19</td><td>1.11</td><td>0.04</td><td>28/78</td><td>1/85</td><td>4</td></tr><tr><td>DO027</td><td>0.04091/13.96901</td><td>1711.47</td><td>1.08</td><td>-0.15</td><td>359/67</td><td>326/86</td><td>4</td><td>DO052</td><td>-0.05883/13.98039</td><td>334.97</td><td>1.08</td><td>0.72</td><td>74/44</td><td>282/64</td><td>6</td></tr></tbody></table>
<table>
  <tbody>
    <tr>
      <td>DO028</td>
      <td>0.01777/13.96386</td>
      <td>950.91</td>
      <td>1.15</td>
      <td>0.34</td>
      <td>303/59</td>
      <td>133/84</td>
      <td>5</td>
      <td>DO053</td>
      <td>-0.03772/13.90623</td>
      <td>40.22</td>
      <td>1.02</td>
      <td>0.65</td>
      <td>265/44</td>
      <td>101/78</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO029</td>
      <td>0.00223/14.04294</td>
      <td>354.12</td>
      <td>1.06</td>
      <td>0.16</td>
      <td>104/3</td>
      <td>285/70</td>
      <td>5</td>
      <td>DO054</td>
      <td>-0.03688/13.89262</td>
      <td>100.47</td>
      <td>1.15</td>
      <td>0.21</td>
      <td>93/74</td>
      <td>86/89</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO055</td>
      <td>-0.01760/13.89443</td>
      <td>1361.99</td>
      <td>1.14</td>
      <td>0.64</td>
      <td>215/65</td>
      <td>68/76</td>
      <td>5</td>
      <td>DO088</td>
      <td>0.02497/14.02744</td>
      <td>1686.01</td>
      <td>1.13</td>
      <td>0.51</td>
      <td>315/19</td>
      <td>305/64</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO056</td>
      <td>-0.06521/13.91495</td>
      <td>801.37</td>
      <td>1.07</td>
      <td>0.16</td>
      <td>247/74</td>
      <td>83/85</td>
      <td>6</td>
      <td>DO090</td>
      <td>0.08253/14.01756</td>
      <td>4248.03</td>
      <td>1.13</td>
      <td>0.06</td>
      <td>257/77</td>
      <td>195/79</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO057</td>
      <td>-0.04443/13.94632</td>
      <td>129.25</td>
      <td>1.03</td>
      <td>0.32</td>
      <td>105/37</td>
      <td>12/37</td>
      <td>4</td>
      <td>DO091</td>
      <td>0.08470/13.99618</td>
      <td>6988.56</td>
      <td>1.16</td>
      <td>0.04</td>
      <td>253/70</td>
      <td>182/71</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO058</td>
      <td>0.02740/14.03973</td>
      <td>3320.24</td>
      <td>1.14</td>
      <td>-0.14</td>
      <td>300/1</td>
      <td>123/11</td>
      <td>6</td>
      <td>DO092</td>
      <td>0.10469/14.00076</td>
      <td>3739.52</td>
      <td>1.15</td>
      <td>-0.03</td>
      <td>266/55</td>
      <td>167/54</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO059</td>
      <td>0.01253/14.04534</td>
      <td>1786.21</td>
      <td>1.15</td>
      <td>-0.08</td>
      <td>275/6</td>
      <td>272/62</td>
      <td>9</td>
      <td>DO094</td>
      <td>0.10204/13.96658</td>
      <td>3063.87</td>
      <td>1.20</td>
      <td>0.02</td>
      <td>236/35</td>
      <td>180/41</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO060</td>
      <td>-0.02122/14.03908</td>
      <td>1023.92</td>
      <td>1.12</td>
      <td>0.11</td>
      <td>259/27</td>
      <td>251/74</td>
      <td>6</td>
      <td>DO095</td>
      <td>0.07426/13.97378</td>
      <td>2990.89</td>
      <td>1.12</td>
      <td>-0.66</td>
      <td>237/52</td>
      <td>71/79</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO061</td>
      <td>0.07352/14.02346</td>
      <td>3739.33</td>
      <td>1.14</td>
      <td>0.41</td>
      <td>171/87</td>
      <td>352/90</td>
      <td>5</td>
      <td>DO101</td>
      <td>0.10400/14.08623</td>
      <td>2338.83</td>
      <td>1.11</td>
      <td>0.32</td>
      <td>185/63</td>
      <td>174/84</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO062</td>
      <td>0.09451/14.03167</td>
      <td>1790.87</td>
      <td>1.18</td>
      <td>0.24</td>
      <td>218/78</td>
      <td>154/79</td>
      <td>6</td>
      <td>DO102</td>
      <td>0.08458/14.08248</td>
      <td>3134.64</td>
      <td>1.08</td>
      <td>0.26</td>
      <td>141/31</td>
      <td>324/85</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO063</td>
      <td>0.06633/14.02486</td>
      <td>2148.47</td>
      <td>1.10</td>
      <td>0.12</td>
      <td>178/50</td>
      <td>175/87</td>
      <td>6</td>
      <td>DO103</td>
      <td>0.05571/14.07456</td>
      <td>3111.51</td>
      <td>1.06</td>
      <td>0.45</td>
      <td>122/59</td>
      <td>329/75</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO064</td>
      <td>0.10794/14.03044</td>
      <td>1600.72</td>
      <td>1.10</td>
      <td>0.00</td>
      <td>287/63</td>
      <td>269/81</td>
      <td>6</td>
      <td>DO104</td>
      <td>0.04893/14.07168</td>
      <td>4798.00</td>
      <td>1.09</td>
      <td>0.42</td>
      <td>2/77</td>
      <td>309/79</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO066</td>
      <td>0.11266/14.06605</td>
      <td>147.50</td>
      <td>1.11</td>
      <td>0.11</td>
      <td>210/51</td>
      <td>175/65</td>
      <td>6</td>
      <td>DO105</td>
      <td>0.08335/13.94832</td>
      <td>576.92</td>
      <td>1.08</td>
      <td>0.29</td>
      <td>257/37</td>
      <td>218/51</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO071</td>
      <td>0.06965/14.09113</td>
      <td>3684.96</td>
      <td>1.13</td>
      <td>0.32</td>
      <td>163/79</td>
      <td>131/84</td>
      <td>6</td>
      <td>DO106</td>
      <td>-0.04517/14.08300</td>
      <td>3528.33</td>
      <td>1.13</td>
      <td>-0.01</td>
      <td>255/30</td>
      <td>242/69</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO072</td>
      <td>0.05246/14.04600</td>
      <td>135.41</td>
      <td>1.06</td>
      <td>0.48</td>
      <td>319/12</td>
      <td>149/50</td>
      <td>6</td>
      <td>DO107</td>
      <td>0.01354/14.11832</td>
      <td>5485.40</td>
      <td>1.16</td>
      <td>0.30</td>
      <td>267/33</td>
      <td>264/85</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO073</td>
      <td>0.04980/14.05506</td>
      <td>1021.42</td>
      <td>1.06</td>
      <td>-0.17</td>
      <td>278/81</td>
      <td>102/89</td>
      <td>6</td>
      <td>DO108</td>
      <td>0.01507/14.13629</td>
      <td>1770.30</td>
      <td>1.21</td>
      <td>0.67</td>
      <td>84/10</td>
      <td>87/89</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO074</td>
      <td>0.05871/13.99891</td>
      <td>3897.92</td>
      <td>1.07</td>
      <td>0.19</td>
      <td>202/31</td>
      <td>129/48</td>
      <td>6</td>
      <td>DO109</td>
      <td>0.02566/14.15057</td>
      <td>81.05</td>
      <td>1.09</td>
      <td>0.31</td>
      <td>268/2</td>
      <td>88/90</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO075</td>
      <td>0.04660/13.91925</td>
      <td>912.02</td>
      <td>1.08</td>
      <td>-0.35</td>
      <td>331/67</td>
      <td>202/72</td>
      <td>6</td>
      <td>DO111</td>
      <td>0.03587/14.13563</td>
      <td>223.51</td>
      <td>1.10</td>
      <td>0.06</td>
      <td>83/54</td>
      <td>72/83</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO076</td>
      <td>0.01222/13.99012</td>
      <td>3922.83</td>
      <td>1.17</td>
      <td>-0.44</td>
      <td>45/69</td>
      <td>302/70</td>
      <td>4</td>
      <td>DO113</td>
      <td>0.04004/14.15104</td>
      <td>628.75</td>
      <td>1.18</td>
      <td>0.66</td>
      <td>277/67</td>
      <td>104/87</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO077</td>
      <td>0.03301/13.91252</td>
      <td>893.94</td>
      <td>1.07</td>
      <td>0.15</td>
      <td>81/47</td>
      <td>333/49</td>
      <td>4</td>
      <td>DO114</td>
      <td>-0.01201/14.09189</td>
      <td>1422.16</td>
      <td>1.12</td>
      <td>0.03</td>
      <td>252/13</td>
      <td>76/74</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO078</td>
      <td>0.08815/13.92146</td>
      <td>6498.42</td>
      <td>1.13</td>
      <td>0.11</td>
      <td>256/40</td>
      <td>238/70</td>
      <td>6</td>
      <td>DO115</td>
      <td>-0.06171/14.11540</td>
      <td>64.11</td>
      <td>1.08</td>
      <td>0.59</td>
      <td>227/52</td>
      <td>62/79</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO079</td>
      <td>0.07989/13.93847</td>
      <td>1180.42</td>
      <td>1.12</td>
      <td>0.24</td>
      <td>261/33</td>
      <td>224/47</td>
      <td>7</td>
      <td>DO150</td>
      <td>0.08430/13.91229</td>
      <td>296.25</td>
      <td>1.11</td>
      <td>0.38</td>
      <td>283/67</td>
      <td>271/85</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO080</td>
      <td>0.06522/13.92921</td>
      <td>488.35</td>
      <td>1.07</td>
      <td>-0.05</td>
      <td>293/37</td>
      <td>259/54</td>
      <td>6</td>
      <td>DO161</td>
      <td>0.04600/13.91334</td>
      <td>585.46</td>
      <td>1.14</td>
      <td>0.26</td>
      <td>316/55</td>
      <td>250/59</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO082</td>
      <td>0.06790/13.88189</td>
      <td>462.48</td>
      <td>1.12</td>
      <td>0.06</td>
      <td>248/74</td>
      <td>73/88</td>
      <td>6</td>
      <td>DO165</td>
      <td>-0.02611/13.83377</td>
      <td>2180.42</td>
      <td>1.09</td>
      <td>-0.32</td>
      <td>108/50</td>
      <td>89/76</td>
      <td>4</td>
    </tr>
    <tr>
      <td>DO083</td>
      <td>0.03380/13.89536</td>
      <td>847.99</td>
      <td>1.15</td>
      <td>0.13</td>
      <td>332/74</td>
      <td>269/76</td>
      <td>6</td>
      <td>DO169</td>
      <td>-0.02519/13.82193</td>
      <td>560.24</td>
      <td>1.06</td>
      <td>0.11</td>
      <td>93/84</td>
      <td>278/89</td>
      <td>6</td>
    </tr>
    <tr>
      <td>DO084</td>
      <td>0.01842/13.93223</td>
      <td>1839.65</td>
      <td>1.04</td>
      <td>-0.23</td>
      <td>278/64</td>
      <td>106/87</td>
      <td>6</td>
      <td>DO171</td>
      <td>-0.00360/13.87793</td>
      <td>275.45</td>
      <td>1.08</td>
      <td>0.57</td>
      <td>25/70</td>
      <td>255/74</td>
      <td>5</td>
    </tr>
    <tr>
      <td>DO085</td>
      <td>0.01696/13.91421</td>
      <td>2106.66</td>
      <td>1.05</td>
      <td>0.17</td>
      <td>1/71</td>
      <td>216/79</td>
      <td>6</td>
      <td>DO172</td>
      <td>-0.02012/13.87783</td>
      <td>37.14</td>
      <td>1.07</td>
      <td>-0.05</td>
      <td>142/82</td>
      <td>58/82</td>
      <td>6</td>
    </tr>
  </tbody>
</table>
<table><tr><td>DO086</td><td>0.01948/13.89709</td><td>266.61</td><td>1.06</td><td>-0.08</td><td>124/72</td><td>0/75</td><td>6</td><td>DO173</td><td>-0.03713/13.87814</td><td>177.39</td><td>1.04</td><td>-0.08</td><td>115/32</td><td>96/62</td><td>6</td></tr><tr><td>DO087</td><td>-0.00081/13.89444</td><td>1291.30</td><td>1.13</td><td>-0.03</td><td>305/83</td><td>271/86</td><td>6</td><td>DO174</td><td>0.03312/13.87783</td><td>1475.78</td><td>1.13</td><td>0.01</td><td>65/70</td><td>255/87</td><td>5</td></tr><tr><td>DO175</td><td>0.01817/13.85768</td><td>365.61</td><td>1.08</td><td>-0.07</td><td>77/68</td><td>54/81</td><td>6</td><td>DO219</td><td>0.08777/14.11287</td><td>3543.61</td><td>1.13</td><td>0.06</td><td>131/19</td><td>314/84</td><td>4</td></tr><tr><td>DO176</td><td>-0.00036/13.86354</td><td>279.81</td><td>1.06</td><td>0.14</td><td>360/60</td><td>221/69</td><td>6</td><td>DO223</td><td>0.07399/14.14483</td><td>119.59</td><td>1.08</td><td>0.73</td><td>115/33</td><td>115/89</td><td>6</td></tr><tr><td>DO177</td><td>-0.02900/13.91264</td><td>135.07</td><td>1.08</td><td>0.18</td><td>207/69</td><td>60/78</td><td>5</td><td>DO224</td><td>0.05787/14.14347</td><td>755.02</td><td>1.29</td><td>0.49</td><td>258/81</td><td>92/88</td><td>5</td></tr><tr><td>DO178</td><td>-0.01572/13.86224</td><td>546.75</td><td>1.12</td><td>-0.28</td><td>119/81</td><td>74/84</td><td>5</td><td>DO225</td><td>-0.00053/14.12902</td><td>104.49</td><td>1.06</td><td>-0.22</td><td>78/2</td><td>258/80</td><td>5</td></tr><tr><td>DO181</td><td>-0.06413/13.89665</td><td>59.24</td><td>1.02</td><td>0.26</td><td>199/54</td><td>66/63</td><td>5</td><td>DO226</td><td>0.00235/14.14417</td><td>803.11</td><td>1.13</td><td>0.64</td><td>236/24</td><td>62/78</td><td>4</td></tr><tr><td>DO196</td><td>0.10775/13.93034</td><td>593.56</td><td>1.07</td><td>0.10</td><td>314/44</td><td>267/56</td><td>4</td><td>DO227</td><td>-0.01211/14.12836</td><td>456.76</td><td>1.07</td><td>0.69</td><td>241/42</td><td>84/67</td><td>6</td></tr><tr><td>DO197</td><td>0.08958/13.92898</td><td>681.87</td><td>1.11</td><td>-0.01</td><td>271/50</td><td>232/62</td><td>5</td><td>DO228</td><td>-0.04262/14.13349</td><td>116.06</td><td>1.09</td><td>0.70</td><td>86/49</td><td>65/72</td><td>5</td></tr><tr><td>DO198</td><td>0.10121/13.94968</td><td>947.92</td><td>1.08</td><td>0.46</td><td>280/24</td><td>241/35</td><td>7</td><td>DO230</td><td>0.03542/14.16078</td><td>52.77</td><td>1.09</td><td>0.65</td><td>285/70</td><td>269/84</td><td>6</td></tr><tr><td>DO203</td><td>0.09101/13.97033</td><td>69.63</td><td>1.25</td><td>0.63</td><td>276/40</td><td>156/44</td><td>6</td><td>DO238</td><td>-0.05097/14.12231</td><td>174.57</td><td>1.12</td><td>0.59</td><td>67/5</td><td>65/66</td><td>5</td></tr><tr><td>DO206</td><td>-0.02392/14.08692</td><td>1304.41</td><td>1.15</td><td>0.76</td><td>247/39</td><td>239/76</td><td>4</td><td>DO242</td><td>-0.05410/14.09787</td><td>43.59</td><td>1.03</td><td>0.32</td><td>49/42</td><td>34/75</td><td>4</td></tr><tr><td>DO207</td><td>-0.01388/14.08407</td><td>116.94</td><td>1.19</td><td>-0.34</td><td>262/21</td><td>99/52</td><td>6</td><td>DO246</td><td>-0.08973/14.00374</td><td>409.70</td><td>1.05</td><td>0.75</td><td>51/8</td><td>233/80</td><td>6</td></tr><tr><td>DO208</td><td>0.00555/14.07442</td><td>3930.39</td><td>1.18</td><td>0.80</td><td>78/52</td><td>222/87</td><td>6</td><td>DO247</td><td>-0.10780/14.00223</td><td>231.60</td><td>1.11</td><td>-0.18</td><td>52/32</td><td>299/34</td><td>6</td></tr><tr><td>DO209</td><td>0.02352/14.07248</td><td>2375.84</td><td>1.16</td><td>0.37</td><td>270/23</td><td>220/68</td><td>5</td><td>DO250</td><td>-0.09762/13.98769</td><td>1700.46</td><td>1.09</td><td>0.31</td><td>283/69</td><td>208/69</td><td>5</td></tr><tr><td>DO211</td><td>0.04011/14.09291</td><td>6013.33</td><td>1.13</td><td>0.61</td><td>284/41</td><td>278/83</td><td>6</td><td>DO251</td><td>-0.09906/13.96436</td><td>2109.33</td><td>1.05</td><td>-0.24</td><td>80/65</td><td>45/77</td><td>4</td></tr><tr><td>DO212</td><td>0.02308/14.09916</td><td>4572.72</td><td>1.16</td><td>0.51</td><td>79/58</td><td>265/86</td><td>6</td><td>DO252</td><td>-0.10885/13.97153</td><td>1034.11</td><td>1.07</td><td>-0.02</td><td>44/47</td><td>9/62</td><td>5</td></tr><tr><td>DO213</td><td>0.00121/14.08803</td><td>1682.20</td><td>1.18</td><td>0.32</td><td>239/70</td><td>79/83</td><td>6</td><td>DO269</td><td>-0.09358/13.95135</td><td>1145.93</td><td>1.10</td><td>-0.06</td><td>283/75</td><td>190/74</td><td>5</td></tr><tr><td>DO214</td><td>-0.03626/14.09265</td><td>436.51</td><td>1.09</td><td>0.40</td><td>271/23</td><td>99/72</td><td>6</td><td>DO270</td><td>-0.07535/13.93169</td><td>1958.65</td><td>1.07</td><td>-0.63</td><td>357/85</td><td>213/87</td><td>6</td></tr><tr><td>DO215</td><td>-0.03816/14.11533</td><td>663.43</td><td>1.12</td><td>0.81</td><td>81/22</td><td>70/61</td><td>4</td><td>DO271</td><td>-0.06037/13.93201</td><td>161.37</td><td>1.07</td><td>0.57</td><td>260/65</td><td>226/75</td><td>5</td></tr><tr><td>DO216</td><td>0.04234/14.11194</td><td>3187.80</td><td>1.11</td><td>0.49</td><td>287/28</td><td>284/84</td><td>6</td><td>DO274</td><td>-0.06634/13.94315</td><td>129.70</td><td>1.08</td><td>-0.20</td><td>63/51</td><td>35/69</td><td>6</td></tr><tr><td>DO217</td><td>0.06401/14.10577</td><td>4838.20</td><td>1.11</td><td>0.43</td><td>309/30</td><td>129/89</td><td>4</td><td>DO275</td><td>-0.10178/13.97818</td><td>734.88</td><td>1.06</td><td>0.33</td><td>305/78</td><td>199/79</td><td>6</td></tr><tr><td>DO218</td><td>0.07608/14.10525</td><td>3389.34</td><td>1.14</td><td>0.47</td><td>284/56</td><td>137/70</td><td>7</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
<table><caption>Table 3</caption><thead><tr><th rowspan="2">Stations</th><th rowspan="2">Coordinates<br>Long./Lat.</th><th colspan="3">Scalar data</th><th colspan="2">Directional data</th><th rowspan="2">Specimens<br>numbers</th><th rowspan="2">Stations</th><th rowspan="2">Coordinates<br>Long./Lat.</th><th colspan="3">Scalar data</th><th colspan="2">Directional data</th><th rowspan="2">Specimens<br>numbers</th></tr><tr><th>Km<br>(x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th><th>Km<br>(x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th></tr></thead><tbody><tr><td>DO120</td><td>-0.45665/14.02430</td><td>691.38</td><td>1.08</td><td>0.30</td><td>188/50</td><td>182/85</td><td>6</td><td>DO323</td><td>-0.27093/14.38664</td><td>669.83</td><td>1.11</td><td>-0.16</td><td>8/83</td><td>255/84</td><td>4</td></tr><tr><td>DO121</td><td>-0.47649/14.03705</td><td>4685.38</td><td>1.14</td><td>-0.23</td><td>234/48</td><td>169/50</td><td>5</td><td>DO324</td><td>-0.29485/14.38227</td><td>2167.41</td><td>1.09</td><td>0.11</td><td>235/53</td><td>113/58</td><td>4</td></tr><tr><td>DO137</td><td>-0.19386/14.41547</td><td>52.91</td><td>1.04</td><td>0.30</td><td>75/77</td><td>273/86</td><td>5</td><td>DO329</td><td>-0.31061/14.41130</td><td>16744.76</td><td>1.28</td><td>0.29</td><td>112/57</td><td>14/57</td><td>5</td></tr><tr><td>DO138</td><td>-0.21051/14.42247</td><td>32.75</td><td>1.03</td><td>-0.002</td><td>307/62</td><td>140/83</td><td>5</td><td>DO332</td><td>-0.38855/14.33392</td><td>512.07</td><td>1.07</td><td>0.21</td><td>69/61</td><td>23/68</td><td>6</td></tr><tr><td>DO139</td><td>-0.30539/14.39267</td><td>1558.60</td><td>1.12</td><td>0.08</td><td>146/39</td><td>88/49</td><td>4</td><td>DO333</td><td>-0.40304/14.32910</td><td>777.31</td><td>1.05</td><td>0.31</td><td>256/52</td><td>219/65</td><td>5</td></tr><tr><td>DO140</td><td>-0.31862/14.37563</td><td>237.89</td><td>1.04</td><td>-0.75</td><td>155/62</td><td>97/67</td><td>4</td><td>DO334</td><td>-0.40307/14.31218</td><td>668.62</td><td>1.16</td><td>-0.11</td><td>214/69</td><td>99/71</td><td>6</td></tr><tr><td>DO141</td><td>-0.31673/14.40180</td><td>1347.51</td><td>1.22</td><td>0.01</td><td>146/69</td><td>37/72</td><td>4</td><td>DO335</td><td>-0.40401/14.29405</td><td>3280.40</td><td>1.16</td><td>0.31</td><td>143/42</td><td>83/46</td><td>5</td></tr><tr><td>DO145</td><td>-0.44414/14.03425</td><td>1755.83</td><td>1.22</td><td>0.13</td><td>192/21</td><td>183/71</td><td>4</td><td>DO336</td><td>-0.38739/14.31021</td><td>7062.37</td><td>1.24</td><td>-0.67</td><td>164/50</td><td>94/51</td><td>6</td></tr><tr><td>DO147</td><td>-0.50124/14.07324</td><td>3501.38</td><td>1.26</td><td>0.23</td><td>241/65</td><td>212/78</td><td>4</td><td>DO337</td><td>-0.42383/14.31666</td><td>149.83</td><td>1.04</td><td>0.37</td><td>231/5</td><td>230/64</td><td>4</td></tr><tr><td>DO151</td><td>-0.50443/14.08664</td><td>1957.44</td><td>1.22</td><td>-0.49</td><td>233/58</td><td>203/72</td><td>6</td><td>DO338</td><td>-0.43930/14.31806</td><td>118.73</td><td>1.06</td><td>0.49</td><td>246/7</td><td>66/88</td><td>4</td></tr><tr><td>DO153</td><td>-0.33797/14.39358</td><td>4256.02</td><td>1.09</td><td>-0.05</td><td>318/68</td><td>265/72</td><td>5</td><td>DO341</td><td>-0.43899/14.30023</td><td>1980.99</td><td>1.30</td><td>-0.13</td><td>207/61</td><td>196/84</td><td>4</td></tr><tr><td>DO154</td><td>-0.35699/14.38817</td><td>74.40</td><td>1.04</td><td>0.21</td><td>62/42</td><td>54/73</td><td>4</td><td>DO342</td><td>-0.42737/14.29476</td><td>3851.61</td><td>1.13</td><td>0.52</td><td>263/78</td><td>233/81</td><td>4</td></tr><tr><td>DO155</td><td>-0.37346/14.37877</td><td>21.66</td><td>1.06</td><td>0.15</td><td>198/51</td><td>53/66</td><td>6</td><td>DO343</td><td>-0.38834/14.29627</td><td>96.26</td><td>1.06</td><td>0.07</td><td>286/15</td><td>147/22</td><td>5</td></tr><tr><td>DO308</td><td>-0.25396/14.41587</td><td>962.67</td><td>1.14</td><td>-0.63</td><td>194/68</td><td>105/68</td><td>4</td><td>DO344</td><td>-0.36572/14.29296</td><td>2217.85</td><td>1.09</td><td>-0.19</td><td>139/70</td><td>103/77</td><td>4</td></tr><tr><td>DO309</td><td>-0.25540/14.40510</td><td>82.47</td><td>1.05</td><td>0.52</td><td>120/76</td><td>89/83</td><td>5</td><td>DO345</td><td>-0.36440/14.30656</td><td>3647.29</td><td>1.05</td><td>-0.25</td><td>218/35</td><td>139/35</td><td>6</td></tr><tr><td>DO313</td><td>-0.38672/14.38817</td><td>218.27</td><td>1.03</td><td>-0.11</td><td>247/81</td><td>163/82</td><td>4</td><td>DO346</td><td>-0.36148/14.33280</td><td>514.78</td><td>1.06</td><td>0.02</td><td>242/40</td><td>220/65</td><td>5</td></tr><tr><td>DO314</td><td>-0.19874/14.40048</td><td>140.90</td><td>1.11</td><td>-0.29</td><td>47/73</td><td>335/74</td><td>6</td><td>DO347</td><td>-0.34751/14.32122</td><td>1787.90</td><td>1.09</td><td>0.46</td><td>143/17</td><td>97/70</td><td>4</td></tr><tr><td>DO315</td><td>-0.20170/14.38576</td><td>222.36</td><td>1.11</td><td>-0.19</td><td>114/81</td><td>304/88</td><td>5</td><td>DO348</td><td>-0.35172/14.30804</td><td>3052.73</td><td>1.11</td><td>-0.22</td><td>138/67</td><td>60/67</td><td>5</td></tr><tr><td>DO316</td><td>-0.21364/14.37944</td><td>1253.74</td><td>1.16</td><td>0.40</td><td>273/55</td><td>264/85</td><td>4</td><td>DO349</td><td>-0.34631/14.29367</td><td>2523.44</td><td>1.08</td><td>0.25</td><td>291/45</td><td>133/71</td><td>4</td></tr><tr><td>DO317</td><td>-0.21497/14.40148</td><td>55.02</td><td>1.04</td><td>0.60</td><td>118/60</td><td>8/62</td><td>4</td><td>DO350</td><td>-0.33422/14.29446</td><td>2327.95</td><td>1.09</td><td>0.54</td><td>245/55</td><td>102/67</td><td>5</td></tr><tr><td>DO318</td><td>-0.23758/14.38372</td><td>171.39</td><td>1.02</td><td>-0.07</td><td>292/8</td><td>105/80</td><td>4</td><td>DO351</td><td>-0.33237/14.31622</td><td>1338.47</td><td>1.10</td><td>0.19</td><td>248/67</td><td>120/72</td><td>5</td></tr><tr><td>DO319</td><td>-0.25088/14.38309</td><td>981.29</td><td>1.04</td><td>0.31</td><td>287/28</td><td>267/52</td><td>4</td><td>DO352</td><td>-0.32468/14.33000</td><td>111.89</td><td>1.02</td><td>-0.02</td><td>125/23</td><td>75/26</td><td>4</td></tr><tr><td>DO320</td><td>-0.23630/14.40321</td><td>130.68</td><td>1.04</td><td>0.11</td><td>217/63</td><td>33/84</td><td>4</td><td>DO353</td><td>-0.31049/14.30522</td><td>508.15</td><td>1.18</td><td>-0.04</td><td>97/78</td><td>84/87</td><td>6</td></tr></tbody></table>
<table>
  <tr>
    <td>DO321</td>
    <td>-0.23321/14.37188</td>
    <td>1281.35</td>
    <td>1.06</td>
    <td>-0.22</td>
    <td>96/69</td>
    <td>286/86</td>
    <td>4</td>
    <td>DO354</td>
    <td>-0.29576/14.29058</td>
    <td>1217.15</td>
    <td>1.12</td>
    <td>-0.39</td>
    <td>210/60</td>
    <td>88/64</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO322</td>
    <td>-0.23319/14.41957</td>
    <td>51.68</td>
    <td>1.05</td>
    <td>-0.32</td>
    <td>145/59</td>
    <td>52/60</td>
    <td>4</td>
    <td>DO355</td>
    <td>-0.28790/14.31109</td>
    <td>1851.83</td>
    <td>1.08</td>
    <td>0.47</td>
    <td>108/43</td>
    <td>64/54</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO356</td>
    <td>-0.29387/14.33322</td>
    <td>35.38</td>
    <td>1.04</td>
    <td>0.79</td>
    <td>197/14</td>
    <td>21/66</td>
    <td>4</td>
    <td>DO403</td>
    <td>-0.36987/14.26436</td>
    <td>2461.27</td>
    <td>1.06</td>
    <td>0.07</td>
    <td>291/46</td>
    <td>287/86</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO357</td>
    <td>-0.27587/14.33317</td>
    <td>307.27</td>
    <td>1.08</td>
    <td>0.02</td>
    <td>246/82</td>
    <td>99/86</td>
    <td>4</td>
    <td>DO404</td>
    <td>-0.36085/14.23855</td>
    <td>1578.04</td>
    <td>1.08</td>
    <td>-0.24</td>
    <td>106/45</td>
    <td>91/75</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO358</td>
    <td>-0.27751/14.31738</td>
    <td>1682.89</td>
    <td>1.07</td>
    <td>0.27</td>
    <td>239/33</td>
    <td>77/65</td>
    <td>5</td>
    <td>DO405</td>
    <td>-0.34757/14.24239</td>
    <td>295.81</td>
    <td>1.03</td>
    <td>-0.09</td>
    <td>165/15</td>
    <td>349/57</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO359</td>
    <td>-0.28092/14.29423</td>
    <td>658.13</td>
    <td>1.09</td>
    <td>-0.02</td>
    <td>290/83</td>
    <td>245/85</td>
    <td>6</td>
    <td>DO406</td>
    <td>-0.34828/14.25821</td>
    <td>388.41</td>
    <td>1.07</td>
    <td>0.26</td>
    <td>172/47</td>
    <td>126/56</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO360</td>
    <td>-0.25041/14.30216</td>
    <td>2703.29</td>
    <td>1.15</td>
    <td>0.10</td>
    <td>240/53</td>
    <td>169/53</td>
    <td>4</td>
    <td>DO407</td>
    <td>-0.34761/14.27710</td>
    <td>2217.47</td>
    <td>1.11</td>
    <td>0.13</td>
    <td>236/64</td>
    <td>89/75</td>
    <td>6</td>
  </tr>
  <tr>
    <td>DO361</td>
    <td>-0.25429/14.31529</td>
    <td>2030.17</td>
    <td>1.09</td>
    <td>0.25</td>
    <td>213/69</td>
    <td>70/78</td>
    <td>4</td>
    <td>DO408</td>
    <td>-0.33740/14.27209</td>
    <td>534.71</td>
    <td>1.09</td>
    <td>0.19</td>
    <td>146/60</td>
    <td>42/60</td>
    <td>6</td>
  </tr>
  <tr>
    <td>DO362</td>
    <td>-0.25143/14.32793</td>
    <td>1473.68</td>
    <td>1.04</td>
    <td>-0.24</td>
    <td>268/80</td>
    <td>268/89</td>
    <td>4</td>
    <td>DO409</td>
    <td>-0.32562/14.25313</td>
    <td>789.83</td>
    <td>1.05</td>
    <td>-0.02</td>
    <td>83/49</td>
    <td>311/57</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO363</td>
    <td>-0.23999/14.32876</td>
    <td>2019.44</td>
    <td>1.10</td>
    <td>-0.19</td>
    <td>100/74</td>
    <td>85/86</td>
    <td>4</td>
    <td>DO410</td>
    <td>-0.33377/14.23612</td>
    <td>231.78</td>
    <td>1.04</td>
    <td>-0.10</td>
    <td>244/8</td>
    <td>65/83</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO364</td>
    <td>-0.23710/14.31288</td>
    <td>637.59</td>
    <td>1.11</td>
    <td>-0.09</td>
    <td>205/83</td>
    <td>70/86</td>
    <td>4</td>
    <td>DO412</td>
    <td>-0.41184/14.26464</td>
    <td>1602.29</td>
    <td>1.12</td>
    <td>0.14</td>
    <td>214/79</td>
    <td>75/83</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO365</td>
    <td>-0.23858/14.29574</td>
    <td>7667.10</td>
    <td>1.41</td>
    <td>-0.19</td>
    <td>210/71</td>
    <td>127/71</td>
    <td>4</td>
    <td>DO413</td>
    <td>-0.30991/14.23722</td>
    <td>537.59</td>
    <td>1.09</td>
    <td>0.18</td>
    <td>219/14</td>
    <td>63/30</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO366</td>
    <td>-0.21817/14.29270</td>
    <td>4141.74</td>
    <td>1.21</td>
    <td>0.20</td>
    <td>199/64</td>
    <td>75/68</td>
    <td>6</td>
    <td>DO414</td>
    <td>-0.31133/14.26800</td>
    <td>922.47</td>
    <td>1.06</td>
    <td>0.12</td>
    <td>118/56</td>
    <td>94/75</td>
    <td>6</td>
  </tr>
  <tr>
    <td>DO367</td>
    <td>-0.21805/14.30849</td>
    <td>368.49</td>
    <td>1.11</td>
    <td>-0.17</td>
    <td>269/68</td>
    <td>263/88</td>
    <td>4</td>
    <td>DO415</td>
    <td>-0.31466/14.27713</td>
    <td>2922.46</td>
    <td>1.14</td>
    <td>-0.15</td>
    <td>232/86</td>
    <td>99/86</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO368</td>
    <td>-0.21959/14.32892</td>
    <td>3040.48</td>
    <td>1.09</td>
    <td>0.01</td>
    <td>174/84</td>
    <td>60/84</td>
    <td>5</td>
    <td>DO418</td>
    <td>-0.29469/14.27927</td>
    <td>1203.01</td>
    <td>1.12</td>
    <td>0.19</td>
    <td>227/24</td>
    <td>68/51</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO369</td>
    <td>-0.19978/14.32576</td>
    <td>11224.75</td>
    <td>1.30</td>
    <td>-0.002</td>
    <td>257/64</td>
    <td>237/81</td>
    <td>4</td>
    <td>DO419</td>
    <td>-0.29319/14.26031</td>
    <td>3330.79</td>
    <td>1.19</td>
    <td>0.36</td>
    <td>165/31</td>
    <td>121/40</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO370</td>
    <td>-0.20314/14.31300</td>
    <td>1219.88</td>
    <td>1.11</td>
    <td>-0.40</td>
    <td>207/70</td>
    <td>181/81</td>
    <td>4</td>
    <td>DO420</td>
    <td>-0.29525/14.24088</td>
    <td>226.79</td>
    <td>1.02</td>
    <td>0.07</td>
    <td>178/16</td>
    <td>169/62</td>
    <td>6</td>
  </tr>
  <tr>
    <td>DO371</td>
    <td>-0.19944/14.29566</td>
    <td>11171.63</td>
    <td>1.13</td>
    <td>-0.18</td>
    <td>196/53</td>
    <td>110/53</td>
    <td>5</td>
    <td>DO421</td>
    <td>-0.27712/14.24137</td>
    <td>612.93</td>
    <td>1.10</td>
    <td>0.55</td>
    <td>168/35</td>
    <td>125/49</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO374</td>
    <td>-0.17636/14.34619</td>
    <td>1852.15</td>
    <td>1.17</td>
    <td>-0.10</td>
    <td>247/59</td>
    <td>151/59</td>
    <td>6</td>
    <td>DO422</td>
    <td>-0.27390/14.25000</td>
    <td>437.88</td>
    <td>1.09</td>
    <td>0.36</td>
    <td>242/42</td>
    <td>304/20</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO375</td>
    <td>-0.18357/14.33521</td>
    <td>6587.96</td>
    <td>1.44</td>
    <td>0.02</td>
    <td>248/51</td>
    <td>102/66</td>
    <td>5</td>
    <td>DO423</td>
    <td>-0.25626/14.27450</td>
    <td>2316.39</td>
    <td>1.09</td>
    <td>0.12</td>
    <td>207/70</td>
    <td>100/71</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO394</td>
    <td>-0.42502/14.22379</td>
    <td>2421.57</td>
    <td>1.07</td>
    <td>-0.16</td>
    <td>195/67</td>
    <td>135/69</td>
    <td>6</td>
    <td>DO424</td>
    <td>-0.25417/14.25858</td>
    <td>629.98</td>
    <td>1.18</td>
    <td>-0.22</td>
    <td>259/63</td>
    <td>211/55</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO395</td>
    <td>-0.42241/14.25863</td>
    <td>1949.73</td>
    <td>1.07</td>
    <td>0.04</td>
    <td>256/73</td>
    <td>217/83</td>
    <td>4</td>
    <td>DO425</td>
    <td>-0.25697/14.24055</td>
    <td>1190.82</td>
    <td>1.09</td>
    <td>0.52</td>
    <td>262/48</td>
    <td>116/63</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO396</td>
    <td>-0.42321/14.27749</td>
    <td>1812.18</td>
    <td>1.08</td>
    <td>-0.004</td>
    <td>227/62</td>
    <td>58/84</td>
    <td>5</td>
    <td>DO426</td>
    <td>-0.24023/14.24012</td>
    <td>4620.55</td>
    <td>1.39</td>
    <td>0.17</td>
    <td>287/43</td>
    <td>172/46</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO397</td>
    <td>-0.40587/14.27880</td>
    <td>665.30</td>
    <td>1.07</td>
    <td>-0.34</td>
    <td>16/87</td>
    <td>285/87</td>
    <td>5</td>
    <td>DO427</td>
    <td>-0.24264/14.25333</td>
    <td>404.70</td>
    <td>1.09</td>
    <td>0.69</td>
    <td>185/31</td>
    <td>160/58</td>
    <td>4</td>
  </tr>
  <tr>
    <td>DO398</td>
    <td>-0.40520/14.23614</td>
    <td>4276.89</td>
    <td>1.06</td>
    <td>-0.37</td>
    <td>223/57</td>
    <td>136/57</td>
    <td>5</td>
    <td>DO428</td>
    <td>-0.22726/14.24445</td>
    <td>1298.12</td>
    <td>1.15</td>
    <td>0.13</td>
    <td>234/75</td>
    <td>187/79</td>
    <td>5</td>
  </tr>
  <tr>
    <td>DO399</td>
    <td>-0.39049/14.24190</td>
    <td>2059.26</td>
    <td>1.04</td>
    <td>0.04</td>
    <td>238/37</td>
    <td>92/53</td>
    <td>5</td>
    <td>DO453</td>
    <td>-0.24107/14.22407</td>
    <td>2603.72</td>
    <td>1.19</td>
    <td>-0.22</td>
    <td>221/60</td>
    <td>202/79</td>
    <td>6</td>
  </tr>
  <tr>
    <td>DO400</td>
    <td>-0.38442/14.26417</td>
    <td>1163.14</td>
    <td>1.04</td>
    <td>0.44</td>
    <td>242/3</td>
    <td>61/65</td>
    <td>4</td>
    <td>DO454</td>
    <td>-0.25606/14.22213</td>
    <td>553.85</td>
    <td>1.03</td>
    <td>0.25</td>
    <td>236/42</td>
    <td>74/61</td>
    <td>4</td>
  </tr>
</table>
<table><tr><td>DO401</td><td>-0.39131/14.28510</td><td>1531.27</td><td>1.08</td><td>0.23</td><td>152/69</td><td>106/84</td><td>6</td><td>DO461</td><td>-0.30914/14.21301</td><td>237.68</td><td>1.06</td><td>0.44</td><td>165/12</td><td>111/15</td><td>5</td></tr><tr><td>DO402</td><td>-0.36205/14.28438</td><td>2427.60</td><td>1.09</td><td>0.34</td><td>22/70</td><td>287/70</td><td>6</td><td>DO462</td><td>-0.31071/14.22638</td><td>170.29</td><td>1.04</td><td>0.53</td><td>220/21</td><td>127/21</td><td>5</td></tr><tr><td>DO463</td><td>-0.29371/14.22068</td><td>564.92</td><td>1.17</td><td>0.17</td><td>189/25</td><td>92/25</td><td>4</td><td>DO488</td><td>-0.45654/14.06713</td><td>48.77</td><td>1.10</td><td>0.34</td><td>291/31</td><td>142/51</td><td>4</td></tr><tr><td>DO464</td><td>-0.27662/14.22344</td><td>235.33</td><td>1.06</td><td>0.32</td><td>248/50</td><td>125/55</td><td>5</td><td>DO489</td><td>-0.44318/14.06593</td><td>877.72</td><td>1.06</td><td>0.04</td><td>192/67</td><td>167/80</td><td>5</td></tr><tr><td>DO465</td><td>-0.36884/14.19785</td><td>507.84</td><td>1.06</td><td>0.13</td><td>168/52</td><td>137/68</td><td>4</td><td>DO490</td><td>-0.44235/14.08114</td><td>755.01</td><td>1.05</td><td>-0.19</td><td>69/70</td><td>57/86</td><td>4</td></tr><tr><td>DO466</td><td>-0.35703/14.20976</td><td>195.92</td><td>1.03</td><td>0.15</td><td>154/12</td><td>347/43</td><td>5</td><td>DO492</td><td>-0.47422/14.10086</td><td>4193.28</td><td>1.35</td><td>-0.07</td><td>233/51</td><td>200/66</td><td>5</td></tr><tr><td>DO467</td><td>-0.33309/14.22131</td><td>133.66</td><td>1.06</td><td>0.43</td><td>177/13</td><td>100/14</td><td>4</td><td>DO493</td><td>-0.45854/14.09695</td><td>1676.99</td><td>1.13</td><td>-0.19</td><td>225/50</td><td>196/68</td><td>5</td></tr><tr><td>DO468</td><td>-0.39005/14.18600</td><td>1353.83</td><td>1.14</td><td>0.14</td><td>176/43</td><td>114/47</td><td>4</td><td>DO494</td><td>-0.43718/14.11780</td><td>503.49</td><td>1.09</td><td>-0.07</td><td>215/52</td><td>173/62</td><td>5</td></tr><tr><td>DO469</td><td>-0.40096/14.19114</td><td>646.36</td><td>1.09</td><td>0.07</td><td>241/37</td><td>120/37</td><td>4</td><td>DO496</td><td>-0.40808/14.11463</td><td>927.69</td><td>1.06</td><td>0.06</td><td>196/65</td><td>194/89</td><td>5</td></tr><tr><td>DO470</td><td>-0.42815/14.20458</td><td>3010.84</td><td>1.06</td><td>-0.06</td><td>193/40</td><td>67/46</td><td>5</td><td>DO502</td><td>-0.38961/14.17680</td><td>162.97</td><td>1.03</td><td>-0.21</td><td>189/56</td><td>167/75</td><td>5</td></tr><tr><td>DO471</td><td>-0.40674/14.20530</td><td>4674.45</td><td>1.13</td><td>-0.37</td><td>192/64</td><td>136/68</td><td>5</td><td>DO503</td><td>-0.36587/14.16332</td><td>82.90</td><td>1.04</td><td>-0.19</td><td>257/67</td><td>108/79</td><td>4</td></tr><tr><td>DO472</td><td>-0.38702/14.20504</td><td>645.93</td><td>1.05</td><td>-0.39</td><td>189/16</td><td>180/50</td><td>4</td><td>DO504</td><td>-0.39554/14.14187</td><td>3147.97</td><td>1.25</td><td>0.35</td><td>183/53</td><td>133/60</td><td>4</td></tr><tr><td>DO473</td><td>-0.33478/14.20748</td><td>1100.85</td><td>1.22</td><td>0.29</td><td>205/37</td><td>133/39</td><td>6</td><td>DO505</td><td>-0.42758/14.13407</td><td>3192.59</td><td>1.09</td><td>-0.43</td><td>198/72</td><td>180/85</td><td>4</td></tr><tr><td>DO474</td><td>-0.34671/14.21874</td><td>98.23</td><td>1.06</td><td>0.37</td><td>183/60</td><td>123/63</td><td>5</td><td>DO506</td><td>-0.39988/14.13235</td><td>3867.43</td><td>1.24</td><td>0.51</td><td>209/59</td><td>176/72</td><td>5</td></tr><tr><td>DO475</td><td>-0.37235/14.22102</td><td>2380.55</td><td>1.07</td><td>0.22</td><td>189/35</td><td>61/42</td><td>6</td><td>DO515</td><td>-0.39875/14.11500</td><td>2174.14</td><td>1.10</td><td>0.12</td><td>162/64</td><td>88/43</td><td>4</td></tr><tr><td>DO476</td><td>-0.38667/14.22786</td><td>1445.16</td><td>1.04</td><td>0.52</td><td>153/38</td><td>99/44</td><td>5</td><td>DO516</td><td>-0.43037/14.11583</td><td>1739.54</td><td>1.22</td><td>0.07</td><td>177/73</td><td>155/88</td><td>4</td></tr><tr><td>DO477</td><td>-0.40652/14.22076</td><td>3160.01</td><td>1.06</td><td>0.33</td><td>243/52</td><td>155/52</td><td>6</td><td>DO517</td><td>-0.40378/14.10403</td><td>1802.55</td><td>1.15</td><td>0.16</td><td>216/79</td><td>174/80</td><td>4</td></tr><tr><td>DO486</td><td>-0.48136/14.02642</td><td>1529.54</td><td>1.17</td><td>-0.37</td><td>358/81</td><td>212/85</td><td>5</td><td>DO526</td><td>-0.35748/14.16583</td><td>506.79</td><td>1.07</td><td>0.08</td><td>125/65</td><td>340/81</td><td>4</td></tr></table>
<table><caption>Table 4</caption><thead><tr><th rowspan="2">Stations</th><th colspan="2">Coordinates</th><th colspan="3">Scalar data</th><th colspan="2">Directional data</th><th rowspan="2">Specimens numbers</th><th rowspan="2">Stations</th><th colspan="2">Coordinates</th><th colspan="3">Scalar data</th><th colspan="2">Directional data</th><th rowspan="2">Specimens numbers</th></tr><tr><th>Long./Lat.</th><th>Km (x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th><th>Long./Lat.</th><th>Km (x10<sup>-6</sup>)</th><th>P</th><th>T</th><th>K1</th><th>K3</th></tr></thead><tbody><tr><td>DO123</td><td>-0.25549/14.06856</td><td>388.02</td><td>1.15</td><td>-0.19</td><td>250/82</td><td>241/87</td><td>4</td><td>DO512</td><td>-0.29499/14.13088</td><td>3325.49</td><td>1.07</td><td>-0.27</td><td>203/46</td><td>188/76</td><td>6</td></tr><tr><td>DO124</td><td>-0.23827/14.08255</td><td>5122.77</td><td>1.24</td><td>-0.37</td><td>277/45</td><td>210/48</td><td>6</td><td>DO513</td><td>-0.29558/14.11310</td><td>2925.62</td><td>1.14</td><td>-0.45</td><td>229/50</td><td>50/90</td><td>4</td></tr><tr><td>DO125</td><td>-0.25882/14.09213</td><td>3827.61</td><td>1.34</td><td>-0.43</td><td>256/52</td><td>246/83</td><td>6</td><td>DO514</td><td>-0.32133/14.11722</td><td>751.96</td><td>1.19</td><td>0.74</td><td>287/31</td><td>153/43</td><td>4</td></tr><tr><td>DO126</td><td>-0.26163/14.11506</td><td>697.29</td><td>1.10</td><td>0.34</td><td>258/53</td><td>215/63</td><td>5</td><td>DO519</td><td>-0.33779/14.10017</td><td>239.04</td><td>1.04</td><td>0.28</td><td>200/6</td><td>185/21</td><td>5</td></tr><tr><td>DO127</td><td>-0.27890/14.11911</td><td>3337.77</td><td>1.10</td><td>-0.34</td><td>228/41</td><td>79/60</td><td>5</td><td>DO520</td><td>-0.31683/14.08881</td><td>1697.35</td><td>1.32</td><td>-0.11</td><td>207/32</td><td>129/33</td><td>5</td></tr><tr><td>DO128</td><td>-0.28129/14.13440</td><td>315.58</td><td>1.10</td><td>-0.07</td><td>182/25</td><td>114/27</td><td>5</td><td>DO521</td><td>-0.29701/14.09828</td><td>1390.78</td><td>1.15</td><td>0.40</td><td>206/20</td><td>178/32</td><td>4</td></tr><tr><td>DO129</td><td>-0.28779/14.10504</td><td>808.32</td><td>1.24</td><td>0.08</td><td>221/49</td><td>88/57</td><td>5</td><td>DO522</td><td>-0.29828/14.07699</td><td>2949.61</td><td>1.18</td><td>-0.26</td><td>200/60</td><td>132/62</td><td>5</td></tr><tr><td>DO130</td><td>-0.28114/14.09103</td><td>968.71</td><td>1.18</td><td>-0.29</td><td>247/49</td><td>244/87</td><td>8</td><td>DO523</td><td>-0.31533/14.08166</td><td>757.41</td><td>1.15</td><td>-0.05</td><td>229/46</td><td>143/46</td><td>6</td></tr><tr><td>DO131</td><td>-0.28008/14.07586</td><td>5855.11</td><td>1.23</td><td>-0.09</td><td>184/29</td><td>135/56</td><td>6</td><td>DO524</td><td>-0.29379/14.15147</td><td>1579.64</td><td>1.15</td><td>0.28</td><td>174/12</td><td>161/44</td><td>5</td></tr><tr><td>DO143</td><td>-0.24217/14.12692</td><td>4773.21</td><td>1.22</td><td>-0.31</td><td>263/52</td><td>173/52</td><td>4</td><td>DO525</td><td>-0.32659/14.14559</td><td>338.19</td><td>1.11</td><td>0.17</td><td>198/27</td><td>151/34</td><td>5</td></tr><tr><td>DO457</td><td>-0.23822/14.18312</td><td>5729.61</td><td>1.19</td><td>0.20</td><td>232/50</td><td>157/50</td><td>4</td><td>DO527</td><td>-0.29153/14.16745</td><td>867.94</td><td>1.14</td><td>-0.10</td><td>207/42</td><td>119/41</td><td>5</td></tr><tr><td>DO458</td><td>-0.25668/14.18124</td><td>1000.73</td><td>1.16</td><td>0.09</td><td>221/50</td><td>182/62</td><td>6</td><td>DO528</td><td>-0.27722/14.17038</td><td>1553.33</td><td>1.18</td><td>-0.15</td><td>225/36</td><td>171/42</td><td>5</td></tr><tr><td>DO459</td><td>-0.28048/14.18245</td><td>300.20</td><td>1.08</td><td>0.12</td><td>228/34</td><td>197/52</td><td>5</td><td>DO529</td><td>-0.27863/14.14897</td><td>1345.39</td><td>1.11</td><td>-0.23</td><td>193/39</td><td>110/42</td><td>4</td></tr><tr><td>DO460</td><td>-0.28977/14.17731</td><td>596.70</td><td>1.11</td><td>0.02</td><td>217/46</td><td>149/49</td><td>4</td><td>DO530</td><td>-0.26327/14.15254</td><td>4654.68</td><td>1.22</td><td>0.25</td><td>201/22</td><td>186/58</td><td>5</td></tr><tr><td>DO509</td><td>-0.33228/14.11487</td><td>230.75</td><td>1.03</td><td>0.41</td><td>256/51</td><td>166/51</td><td>6</td><td>DO531</td><td>-0.25906/14.16550</td><td>436.28</td><td>1.05</td><td>-0.26</td><td>270/31</td><td>114/56</td><td>4</td></tr><tr><td>DO510</td><td>-0.32807/14.12968</td><td>417.09</td><td>1.10</td><td>0.67</td><td>216/42</td><td>147/44</td><td>5</td><td>DO532</td><td>-0.24305/14.16424</td><td>8584.10</td><td>1.25</td><td>0.16</td><td>231/30</td><td>173/34</td><td>4</td></tr><tr><td>DO511</td><td>-0.31142/14.13535</td><td>2402.77</td><td>1.05</td><td>0.32</td><td>266/12</td><td>113/24</td><td>4</td><td>DO533</td><td>-0.23953/14.15056</td><td>775.88</td><td>1.16</td><td>0.11</td><td>263/45</td><td>200/47</td><td>4</td></tr></tbody></table>

N.B: Km in $10^{-6}$ SI. Km, P and T are dimensionless in the international system. K1 and K3 are given in degrees
Figures captions

Figure 1: Geological map of the Man/Léo shield

Figure 2: Location of the studied area on the synthetic geological map of Burkina Faso
(modified from Castaing et al., 2003)

Figure 3: Interpretative map of the aeromagnetic image of the studied area (BUMIGEB. 2015)

Figure 4: Map of magnetic susceptibility and frequency histograms

Figure 5: Susceptibility (K) vs. Temperature (T) curves of samples of the TTG country rock and biotite granites

Figure 6: Map of shape factor (T) in the three plutons

Figure 7: Map of anisotropy degree (P) in the three plutons

Figure 8: Shape factor (T) vs. anisotropy degree (P)

Figure 9: Magnetic lineation of the Dori pluton and his country rock. (a) Organization of lineation on the map. (b) Lower hemisphere equal-area projection diagram of the lineation of Dori pluton

Figure 10: Magnetic lineation of the Gorom-Gorom and Touka Bayèl plutons and their close country rocks. (a) Organization of lineation on map view. (b and c) Lower hemisphere equal-area projection diagram of the lineation of the sector A and B of the Gorom-Gorom pluton. (d) Lower hemisphere equal-area projection diagram of the lineation of the Touka Bayèl pluton

Figure 11: Magnetic foliations of the Dori pluton and his country rock. (a) Organization of foliations on the map. (b) Lower hemisphere equal-area projection diagram of the foliations of Dori pluton

Figure 12: Magnetic foliations of the Gorom-Gorom and Touka Bayèl plutons and their close country rocks. (a) Organization of foliations on the map. (b, c, d and e) Lower hemisphere equal-area projection diagram of the foliations of the sector A. B1. B2 and B3
of the Gorom-Gorom pluton. (f) Lower hemisphere equal-area projection diagram of the foliation of the Touka Bayèl pluton

Figure 13: Main microstructures of the biotite granites and their nearby host rocks. (a) Magmatic microstructure in biotite granites. (b) Magmatic microstructure in the TTG host rock. (c) High temperature solid state deformation microstructure in biotite granite. (d) Low temperature solid state deformation microstructure in biotite granite. Hb: Hornblende – Bi: Biotite – Ep: Epidote – Pl: Plagioclase – Op: Opaque – Qz: Quartz – Mi: Microcline

Figure 14: Map of the microstructures of the three plutons. (a) Dori pluton and his nearby country rocks. (b) Gorom-Gorom and Touka Bayèl plutons and their nearby country rocks

Figure 15: Conceptual emplacement models of Gorom-Gorom (a), Touka Bayèl (b), Dori (c)
<figure><img src="image_3.png" /><figcaption>Figure 1</figcaption></figure>
<figure><img src="image_4.png" /><figcaption>Figure 2</figcaption></figure>
<figure><img src="image_5.png" /><figcaption>Figure 3</figcaption></figure>
<figure><img src="image_6.png" /><figcaption>Figure 4</figcaption></figure>
<figure><img src="image_7.png" /><figcaption>Figure 5</figcaption></figure>
<figure><img src="image_8.png" /><figcaption>Figure 6</figcaption></figure>
<figure><img src="image_9.png" /><figcaption>Figure 7</figcaption></figure>
<figure><img src="image_10.png" /><figcaption>Figure 8</figcaption></figure>
<figure><img src="image_11.png" /><figcaption>Figure 9</figcaption></figure>
<figure><img src="image_12.png" /><figcaption>Figure 10</figcaption></figure>
<figure><img src="image_13.png" /><figcaption>Figure 11</figcaption></figure>
<figure><img src="image_14.png" /><figcaption>Figure 12</figcaption></figure>
<figure><img src="image_15.png" /><figcaption>Figure 13</figcaption></figure>
<figure><img src="image_16.png" /><figcaption>Figure 14</figcaption></figure>
<figure><img src="image_17.png" /><figcaption>Figure 15</figcaption></figure>
Appendix:

Appendix 1: Host rocks stereograms with K1, K2 and K3 and their limit of confidence

Appendix 2: Dori pluton stereograms with K1, K2 and K3 and their limit of confidence

Appendix 3: Gorom-Gorom pluton stereograms with K1, K2 and K3 and their limit of
confidence

Appendix 4: Touka Bayèl pluton stereograms with K1, K2 and K3 and their limit of confidence
Appendix 1

<figure><img src="image_18.png" /></figure>

DO065

<figure><img src="image_19.png" /></figure>

DO068

<figure><img src="image_20.png" /></figure>

DO188

<figure><img src="image_21.png" /></figure>

DO330
<figure><img src="image_22.png" /><figcaption>Appendix 2</figcaption></figure>
<figure><img src="image_23.png" /><figcaption>Appendix 3</figcaption></figure>
<figure><img src="image_24.png" /><figcaption>Appendix 4</figcaption></figure>
## Highlights

The present paper deals with internal structures of granitic plutons which are apparently isotropic at field scale using the technique of Anisotropy of Magnetic Susceptibility (AMS) and the examination of the microstructures.

This study is going to help to reconstitute the rheological context of emplacement of these plutons. It is also going to help reconstitute the orientation of stresses which prevailed at this moment and after as the granitoid are the best markers of crustal evolution.
**Declaration of interests**

☐ The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

☒ The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:

YAMEOGO reports financial support was provided by WAXI2 Programm. YAMEOGO reports equipment, drugs, or supplies was provided by Institut de Recherche pour le Développement (IRD).