bluuebunny/crossref_metadata_2025_split huggingface dataset:
The building of pericratonic mountain ranges : structural and kinematic constraints applied to GIS-based reconstructions of SE Asia
Authors: Pubellier Manuel , Ego Frederic , Chamot-Rooke Nicolas , Rangin Claude 
Published: June 2005

Abstract
Southeast Asia represents a valuable playground for studying the mechanisms of supra subduction mountain building. Fast relative plate velocities induce rapid geodynamic changes, so that the parameters for the convergence can be constrained, whereas the recently inactivated systems are still accessible. We make use of the GPS-controlled motion of major plates together with that of smaller units within the deformed belts, to explore the Neogene evolution of SE Asia. We present simplified synthetic sections for the structural control, and used GIS-based reconstructions to support the relative location of the plates and distances between them, so that at a given time, location of units can be confronted to the tectonic observations.
Pericratonic mountain ranges are the result of long lasting convergence which was responsible for both the fragmentation of continental landmasses by the opening of marginal basins, and the shortening of these supra subduction units, which ultimately jammed them back against the motherland, or transferred them to the neighbouring plate. Because the obliquity of the convergence generated strain partitioning, new paired trench and strike-slip systems are created, moving blocks further away from the locus of accretion, so that continental or oceanic fragments may be chopped, transported and eventually severely sheared during final docking. We present simplified cross sections of the margins of the SE Asian regions prior and after the accretions of blocks and reconstructions at 2, 4, 6, 10, 15 and 20 Ma.
Application of proton magnetic resonance soundings to groundwater reserve mapping in weathered basement rocks (Brittany, France)
Authors: Wyns Robert , Baltassat Jean-Michel , Lachassagne Patrick , Legchenko Anatoly , Vairon Jacques , Mathieu Francis 
Published: June 2005

Abstract
The Proton Magnetic Resonance (PMR) or Nuclear Magnetic Resonance (NMR) method, coupled with geometrical aquifer modelling, has been used to create a map of groundwater reserves over a 270 km2 study area in a weathered basement setting. Most of the reserves are contained in a stratiform multi-layer aquifer whose geometry is influenced by the weathering front. The depths to the interfaces determined by PMR are considered and validated by comparison with the geometrical approach. Water contents and decay times of the PMR signal for each weathered layer are compared with the hydrogeological model. The results of the study show a decrease in water content from the top downwards for the three main aquifer layers (respectively : unconsolidated alterite, and an upper and a lower fissured zone). The groundwater reserves (80 % in the fissured zone and 20 % in unconsolidated alterite) represent approximately three years of average infiltration.
Review of the tetrapod fauna of the “Lower Stormberg Group” of the main Karoo Basin (southern Africa) : implication for the age of the Lower Elliot Formation
Authors: Knoll Fabien 
Published: June 2005

Abstract
On the basis of its tetrapod fauna, the “Stormberg Group” of southern Africa can be divided into at least two zones. The lowest one is composed of the Molteno and Lower Elliot Formations. It has yielded remains of poorly known stereospondyls, unpublished rauisuchians, enigmatic carnivorous dinosaurs, numerous prosauropods, and rare sauro-pods and cynodonts. The presence of an ornithischian and a chelonian is alleged, but that of a dicynodont is quite doubtful. The age of the Lower Elliot Formation has been the subject of much speculation. A parallel is drawn with European Upper Norian-“Rhaetian” sites in which plateosaurid prosauropods constitute the vast majority of macrovertebrate remains. In conclusion, the Lower Elliot Formation is correlated with the Apachean “Land Vertebrate Faunachron”, which suggests that it is not older than late Norian.
Correlation of syn-orogenic tectonic and metamorphic events in the Cyclades, the Lycian nappes and the Menderes massif. Geodynamic implications
Authors: Jolivet Laurent , Rimmelé Gaëtan , Oberhänsli Roland , Goffé Bruno , Candan Osman 
Published: June 2005

Abstract
The recent discovery of HP-LT parageneses in the basal unit of the Lycian nappes and in the Mesozoic cover of the Menderes massif leads us to reconsider and discuss the correlation of this region with the nearby collapsed Helle-nides in the Aegean domain. Although similarities have long been pointed out by various authors, a clear correlation has not yet been proposed and most authors insist more on differences than similarities. The Menderes massif is the eastern extension of the Aegean region but it has been less severely affected by the Aegean extension during the Oligo-Miocene. It would thus be useful to use the structure of the Menderes massif as an image of the Aegean region before a significant extension has considerably reduced its crustal thickness. But the lack of correlation between the two regions has so far hampered such comparisons. We describe the main tectonic units and metamorphic events in the two regions and propose a correlation. We then show possible sections of the two regions before the Aegean extension and discuss the involvement of continental basement in the Hellenic accretionary complex. In our interpretation the Hellenic-Tauric accretionary complex was composed of stacked basement and cover units which underwent variable P-T histories. Those which were not exhumed early enough later followed a high-T evolution which led to partial melting in the Cyclades during post-orogenic extension. Although the Menderes massif contains a larger volume of basement units it does not show significant evidence for the Oligo-Miocene migmatites observed in the center of the Cyclades suggesting that crustal partial melting is strictly related to post-orogenic extension in this case.
The Claps of Luc-en-Diois (Drôme, SE France) : evaluation of a lake fill volume based on a morphological model
Authors: Brocard Gilles 
Published: June 2005

Abstract
The Claps Lake near Luc-en-Diois is a naturally dammed palaeo-lake fed by the Drôme River sediment load during the Little Ice Age (LIA). The present assessment is based on a valley reconstruction using a geomorphic model. It illustrates the potentiality and limits of the geomorphic analysis to accurately predict the buried topography. This method indeed may help to reduce the prospecting work required in classical evaluations of fill volumes of such natural dams.
The lake was rapidly filled with sediments, indicating enhanced erosion of the watershed during the LIA. Several studies have attempted to quantify the volume of the lake fill and use it to assess erosion rates during the LIA. Very little is known, however, about the geometry of the buried valley. Estimated lake volumes and erosion rates vary depending on how the buried valley is reconstructed and what correcting factors are used for calculating erosion rates.
The present assessment is based on a valley reconstruction using a geomorphic model calibrated by the surrounding drainage network, as well as the introduction of correcting factors that improve the corrections applied in the previous works.
The resulting lake volume is 71–81.106 m3, and the mean erosion rate at 0.7-1.2 mm.yr-1, a high value compared to previous estimates. This rate is compared to the results obtained by various methods and over different timescales in the surrounding region.
Tectono-sedimentary evolution of a fore-chain domain : example of the Habt and Sidi Mrayt basins, northwestern external Moroccan Rif ; stratigraphic precisions and tectonic modelling
Authors: Zakir Abdelali , Chalouan Ahmed , Feinberg Hugues 
Published: June 2005

Abstract
In this paper, a tecto-sedimentary evolution model of the northwestern external Rif zones (Morocco) is proposed. It is based on the study of structural relationships and the biostratigraphic and sedimentologic analysis of different Tertiary syn-tectonic units. This zone shows alternating foredeep basins and anticlinal ramps with a NNW-SSE structural trend and a vergence toward the WSW. The trend of turbiditic bodies and palaeocurrent directions (from the SSE to the NNW) are parallel to the regional tectonic strike. Sidi Mrayt and El Habt basins are filled with syn-tectonic middle Eocene to middle Miocene sediments; The Habt basin is subdivided in two sub-basins: Asilah-Larache and Rirha-Gzoula. The deposits are distributed in two separated turbiditic complex, each one including a stacking of turbiditic systems. The Rirha-Gzoula and Asilah-Larache sub-basins are located in front of two anticline ridge structures made up of Upper Cretaceous and Lower Eocene material; they are respectively Boujediane and Arbaa Ayacha anticlines. The distribution of turbiditic bodies, unconformities and structural relationships within the thrusts and folds system in the northwestern external Rif indicate the progression toward the external zones of fault-propagation folds and associated basins.
Morphometry of selected calcareous nannofossils across the Cretaceous-Paleocene boundary at the Bidart (France) and Elles (Tunisia) sections. Comparison with carbon and oxygen stable isotope ratios
Authors: Thibault Nicolas , Minoletti Fabrice , Gardin Silvia , Renard Maurice 
Published: June 2005

Abstract
A detailed biometric analysis of five species of calcareous nannofossils was carried out on samples from the uppermost Maastrichtian and lowermost Danian of Bidart (Basque Country, SW France) and Elles (central Tunisia). This study reveals the existence of two morphotypes of A. cymbiformis and an abrupt reduction of the five species immediately below the K-T boundary, likely in relation with a stressful environment, which would have developed just before the deposition of the iridium level, followed by a sudden size increase in the basal Danian reflecting the reworking pattern of the Cretaceous species. In addition, the comparison of biometric and isotopic data seems to indicate that the two morphotypes of A. cymbiformis have different ecologies, the large one being favoured in cool waters.
Subduction-related magmatic imprint of most Philippine ophiolites: implications on the early geodynamic evolution of the Philippine archipelago
Authors: Tamayo* Rodolfo A. , Maury* René C. , Yumul Graciano P. , Polvé Mireille , Cotten Joseph , Dimantala Carla B. , Olaguera Francia O. 
Published: June 2005

Abstract
The basement complexes of the Philippine archipelago include at least 20 ophiolites and ophiolitic complexes. These complexes are characterised by volcanic sequences displaying geochemical compositions similar to those observed in MORB, transitional MORB-island arc tholeiites and arc volcanic rocks originating from modern Pacific-type oceans, back-arc basins and island arcs. Ocean island basalt-like rocks are rarely encountered in the volcanic sequences. The gabbros from the ophiolites contain clinopyroxenes and plagioclases showing a wide range of XMg and An values, respectively. Some of these gabbros exhibit mineral chemistries suggesting their derivation from basaltic liquids formed from mantle sources that underwent either high degrees of partial melting or several partial melting episodes. Moreover, some of the gabbros display a crystallization sequence where orthopyroxene and clinopyroxene appeared before plagioclase. The major element compositions of coexisting orthopyroxenes and olivines from the mantle peridotites are consistent with low to high degrees of partial melting. Accessory spinels in these peridotites display a wide range of XCr values as well with some of them above the empirical upper limit of 0.6 often observed in most modern mid-oceanic ridge (MOR) mantle rocks. Co-existing olivines and spinels from the peridotites also exhibit compositions suggesting that they lastly equilibrated under oxidizing mantle conditions.
The juxtaposition of volcanic rocks showing affinities with modern MOR and island arc environments suggests that most of the volcanic sequences in Philippine ophiolites formed in subduction-related geodynamic settings. Similarly, their associated gabbros and peridotites display mineralogical characteristics and mineral chemistries consistent with their derivation from modern supra-subduction zone-like environments. Alternatively, these rocks could have, in part, evolved in a supra-subduction zone even though they originated from a MOR-like setting.
A simplified scenario regarding the early geodynamic evolution of the Philippines is proposed on the basis of the geochemical signatures of the ophiolites, their ages of formation and the ages and origins of the oceanic basins actually bounding the archipelago, including basins presumed to be now totally consumed. This scenario envisages the early development of the archipelago to be largely dominated by the opening and closing of oceanic basins. Fragments of these basins provided the substratum on top of which the Cretaceous to Recent volcanic arcs of the Philippines were emplaced.
Normapolles. Comparison between central and southwestern Europe during the Cenomanian and Turonian : evolution of biodiversity and paleoenvironment
Authors: Méon Henriette , Guignard Gaëtan , Pacltová Blanka , Svobodová Marcela 
Published: June 2005

Abstract
Through a study of some selected sites, the group of pollen, Normapolles, extinct Angiosperms, appears to be an example illustrating the biodiversity in space, both in France and Czech Republic, as well as in time, from Cenomanian to Turonian. This first study shows an evolution, from a low biodiversity during the Middle Cenomanian, to an “explosion” of the number of forms in the late Turonian-early Coniacian. This biodiversity evolution seems to be linked to palaeoenvironmental changes, such as anoxic crisis, climate and/or eustacy...
Oxfordian sedimentary dykes : tectonic and diagenetic implications for the eastern Paris basin
Authors: André Grégoire , Hibsch Christian , Beaudoin Bernard , Carpentier Cédric , Fourcade Serge , Cathelineau Michel , Élion Pascal 
Published: June 2005

Abstract
Vertical fractures in Oxfordian limestones of the eastern part of the Paris Basin are interpreted as resulting from synsedimentary extensional deformations which occurred during the Mesozoic. These NNE-SSW striking fractures are 10 to 20 meters in height, and filled with microgranular material.
The fractures mainly affect crinoidal and oolitic grainstones. Their micritic to microsparitic, lithoclast-bearing infills may have resulted from the solidification of an ancient mud injected from non-lithified, overlying layers of marine sediments. They should therefore be referred to as sedimentary dykes. Graded layering suggests deposition under turbulent flow conditions, whereas later plastic deformation and breccia formation indicate a syndiagenetic reworking. Such observations are consistent with a predominance of the sedimentary dykes in grainstones, which are more rapidly lithified and therefore subject to early fracturing. On the contrary, these dykes are rare in mudstones which may constitute the source of the material for the infills in the grainstones.
Both the analysis of the wall geometry and the reconstruction of the diagenetic history of the infills make possible to distinguish two types of sedimentary dykes. The first type corresponds to a fracturation characterized by irregular walls around the rock-constituting grains (i.e. crinoidal debris or ooids), whereas the walls in the second type are cross-cutting the grains and present a fringe of sparite predating the microsparite infill.
The following scenario is proposed for the first type of sedimentary dykes: i) syntaxial cementation of crinoidal debris and early cementation of ooids; ii) fracturing along grain boundaries under low burial strain; iii) filling of fractures and open porosity by the mud. The second type of sedimentary dykes was formed under deeper burial conditions, which is indicated by both pre-existing bedding-parallel stylolites and the precipitation of sparite on the walls before the sedimentary infill. This early fracturation and the availability of a sedimentary filling, non-lithified material point to a late Jurassic age for these sedimentary dykes.
The δ18OSMOW isotopic signatures measured for the infilling sparite and microsparite materials indicate that these were precipitated from meteoric waters, either early during the formation of the sedimentary dykes or during a later recrystallization event.
The sedimentary dykes have recorded an E-W extension during the Oxfordian-Kimmeridgian period, which is in good agreement with the late Jurassic tectonic history of the western European platform. This early Oxfordian-Kimmeridgian fracturing and its associated fluid paleocirculations is of major interest in the context of the tectonic history of the Paris Basin, since most of these N-S to NNE-SSW tension gashes have been previously attributed to the Eocene Pyrenean shortening and Oligocene rifting stages.
Stratigraphic evolution of Triassic arc-backarc system in northwestern Croatia
Authors: Goričan Špela , Halamić Josip , Grgasović Tonći , Kolar-Jurkovšek Tea 
Published: June 2005

Abstract
Middle Triassic arc-related extensional tectonics in the western Tethys generated a complex pattern of intra-and backarc basins. We studied volcano-sedimentary successions of subsided continental-margin blocks (Mts. Žumberak and Ivanščica) and of dismembered incomplete ophiolite sequences interpreted as remnants of a backarc basin (Mts. Medvednica and Kalnik) in northwestern Croatia. We dated the successions with radiolarians, conodonts, foraminifers, algae, and sponges.
The continental margin experienced a phase of accelerated subsidence in the late Anisian that was approximately coincident with the onset of intermediate and acidic volcanism; pelagic sediments with volcaniclastics accumulated atop subsided carbonate platforms. These relatively shallow basins were later infilled completely by prograding platforms in the late Ladinian-Carnian. In the backarc basin, sea-floor spreading initiated near the Anisian-Ladinian boundary and continued into the late Carnian. Pillow basalts were erupted and interlayered with radiolarian cherts and shales.
The studied area was a part of a larger Triassic arc-backarc system preserved in the southern Alps, Alpine-Carpathian Belt, Dinarides, and Hellenides. Volcano-sedimentary successions of Mts. Medvednica and Kalnik are relics of the Meliata-Maliak backarc basin. In comparison to other previously dated oceanic remnants of this system, the longest continuous sea-floor spreading is now documented in one restricted tectonic unit.
High-frequency relative sea level variation cycles recorded in sedimentary discontinuities
Authors: Hamon Youri , Merzeraud Gilles , Combes Pierre-Jean 
Published: June 2005

Abstract
In the Lodève region (“Caussenard High” southwestern margin of the South-East Basin), upper Hettangian to Lotharingian carbonate series shows more than twenty sedimentary discontinuities of various types. Some of these discontinuities are polyphase surfaces, which record high-frequency sea-level variation cycles. One of these discontinuities has been studied in detail, in order to understand its origin (processes, chronology of formation). Several stages of formation have been recognized. A transgressive erosion occurred first. Next, development of Skolithos and Diplocraterion burrows, associated with iron mineralizations, could be indicative of a condensation phase corresponding to the subsequent maximum-flooding period. The burrows sparitic fills may characterize the highstand period following the maximum-flooding period. Next, alteration and corrosion observed on the surface and in the burrows may indicate an emersion related to a regressive phase and the subsequent lowstand period. Finally, micro mud-mounds (formed by pelecypods and corals trapping fine lime sediment) may indicate a new condensation phase, associated with the transgression and the following maximum-flooding period. Thus, this discontinuity records one and a half relative sea level variation cycle. Counting sequences observed in the deposits and in the discontinuities leads to an estimate of 100,000 years duration for these cycles. That could correspond to the eccentricity variation cycles. Moreover, the local synsedimentary tectonics may have influenced the formation of this type of discontinuity, by forming shallow restricted environments favourable to their development. Recognition and understanding of these particular discontinuities are essential because they may be laterally correlated with other surfaces in continental settings (paleokarst) or with classical sequences in marine environments.
The tetrapod fauna of the Upper Elliot and Clarens formations in the main Karoo Basin (South Africa and Lesotho)
Authors: Knoll Fabien 
Published: June 2005

Abstract
In the main Karoo Basin (southern Africa), the “Stormberg Group” can be divided into at least two faunal zones on the basis of its palaeontological content. The upper one encompasses the Upper Elliot and Clarens formations (“Upper Stormberg Group”). It is well known for its prosauropod and cynodont fauna, but it has also yielded some ste-reospondyl remains, a turtle, at least one lepidosaur, a small variety of crocodylomorphs, rare theropod elements, and an assortment of ornithischians. The presence of pterosaurs is put forward on ichnological grounds, but aetosaur and rauisuchian representatives do not appear to be present. The age of the “Upper Stormberg Group” has been the subject of much speculation. Strong analogies with the skeletal and ichnological record of Lower Jurassic North American formations provide evidence that the Upper Elliot Formation is fundamentally Hettangian in age. The lower part of the Clarens Formation would essentially correspond to the Sinemurian whereas its upper part, which is poor in fossils, would be Pliensbachian in age.
Movement of Lagoon‐Liquor Constituents below Four Animal‐Waste Lagoons
Authors: DeSutter Tom M. , Pierzynski Gary M. , Ham Jay M. 
Published: June 2005

ABSTRACTMovement of liquor constituents from animal‐waste lagoons has the potential to degrade ground water quality. The depth of movement and concentrations of lagoon‐liquor constituents in the soil underlying three cattle (Bos taurus)‐waste retention lagoons and one swine (Sus scrofa)‐waste lagoon were determined. Samples were taken by using a direct‐push coring machine, dissected by depth, and analyzed for total N, organic C, CaCO3, pH, cation exchange capacity (CEC), texture, and extractable NO3, NH4, P, Cl, Ca, Mg, K, and Na. Ammonium N concentrations were greatest in the upper 0.5 m of soil under all four lagoons with concentrations ranging from 94 to 1139 mg kg−1Organic N was determined to make up between 39 and 74% of the total N beneath all lagoons. The swine lagoon had 2.4 kg N m−2in the underlying soil whereas the cattle lagoon with highest quantity of N had 1.2 kg N m−2in the underlying soil. Although N concentrations decreased with depth, N was greater than expected background levels at the bottom of some cores, indicating that the sampling efforts did not reach the bottom of the N plume. Nitrate N concentrations were generally less than 5 mg kg−1immediately below the lagoon floor. In the uppermost 0.5 m of soil underlying the swine and three cattle lagoons, NH4+occupied 44% and between 1 and 22% of the soil cation exchange sites, respectively. The depth of movement of N under these lagoons, as much as 4 m, may pose remediation difficulties at lagoon closure.