bluuebunny/crossref_metadata_2025 huggingface dataset:
Geology of Rookery Creek zinc-lead showings, Cornwallis Island, Nunavut
Authors: Turner E , Dewing K
Published: November 2010

Four zinc-lead showings are known from the Middle Ordovician Bay Fiord and Thumb Mountain formations at Rookery Creek on western Cornwallis Island. Mapping of the Rookery Creek area was updated at 1:50 000 scale. The geology is complex, with four fault sets
superimposed on a broad anticlinorium. Three of four showings are at the intersection of a northwest-trending 'fulcrum fault', that forms the western edge of a half graben, with east-trending faults that offset stratigraphic units within the half graben. Despite the existence of three as yet
untested areas in which mineralization might be expected, the attractiveness of Rookery Creek as an exploration target is reduced by the lack of a shale aquitard to mineralizing fluids, and by a low Pb/Zn ratio, suggesting a smaller fluid system than was present at Polaris mine. Other areas
structurally similar to Rookery Creek and favourable for Zn mineralization, however, may be present elsewhere on the island.
New interpretations of industry seismic lines, southern Quebec Appalachians foreland
Authors: Séjourné S , Dietrich J R , Malo M
Published: November 2010

Reprocessing and reinterpretation of sixteen industry seismic lines (Shell-Société Québecoise d'Initiatives Pétrolières, BHP, and Bow Valley) located south of Drummondville provide new information on the tectonic history and the
stratigraphy of southern Quebec Appalachians structural front. Preliminary results show that the typical structural style of the parautochthonous domain is one of long décollements involving the platform strata from (?)Potsdam to Trenton groups. Some synsedimentary, base-ment- involved normal
faults were active during the deposition of the Utica Shale. Those normal faults often control the location of the Taconian décollement ramps. Alimestone unit at the base of the Potsdam Group is also clearly recognized on most of the lines.
Aeromagnetic survey program of the Geological Suevey of Canada, 2001-2002
Authors: Dumont R , Kiss F , Ford M , Maurice Y , Coyle M , Potvin J , Oneschuk D , Dostaler F , Tod J
Published: November 2010

In 2001, the Geological Survey of Canada supervised six aeromagnetic survey contracts total-ling 391 873 line-kilometres. These surveys were flown in British Columbia, Northwest Territories, Nunavut, Quebec, and New Brunswick. In addition, the recompilation of
private-sector airborne-geophysical survey data sets were completed for northern Ontario and Newfoundland. A helicopter-borne electromagnetic/magnetic survey for groundwater detection in northeastern Brazil was jointly supervised by the GSC and Servico Geologico do Brasil.
A preliminary scheme for multihierarchical rock classification for use with thematic computer-based query systems
Authors: Struik L C , Quat M B , Davenport P
H , Okulitch A V
Published: November 2010

Amultiple hierarchical system of rock classification is introduced to permit widely applicable thematic querying of bedrock geological databases. The classification is based on three main rock character-istics: composition, texture, and fabric. These
characteristics permit queries that would yield results useful across scientific disciplines that rely on rock properties (e.g. agriculture, forestry, fishery). In addition, rock names in the classification are linked to the common geological genetic criteria: igneous, sedimentary, and metamorphic.
These genetic assignments would yield results useful for traditional geological thinking. The linkage between a rock classification built on rock properties and fundamental rock genesis appears to pro-vide the most versatility for computer-based rock database systems. The scheme is extensible and
can easily adapt to the evolution of genetic concepts.
Indicator mineral content and geochemistry of till around the Peddie kimberlite, Lake Timiskaming, Ontario
Authors: McClenaghan M B , Kjarsgaard B A , Kjarsgaard I
M
Published: November 2010

This report presents results of till sampling in the vicinity of the Peddie kimberlite, Bucke Township, in the Lake Timiskaming kimberlite cluster of northeastern Ontario. Thirty till samples were collected (mainly south) of the Peddie kimberlite to document the
nature of glacial dispersal from the kimberlite, using both indicator minerals and till geochemistry. Most of the kimberlite indicator minerals in till were found in the finest of the three size fractions (0.25 to 0.5, 0.5 to 1.0 and 1.0 to 2.0 mm) of heavy mineral concentrates examined. Till in the
vicinity of the Peddie kimberlite contains a distinctive kimberlitic geochemical signature defined by Ni, Cr, Nb, and Ta, which is most apparent in the coarse to very coarse sand (0.5 to 2.0 mm) and the silt+clay (<0.063 mm) fractions. Two dispersal trains in till were detected near the
Peddie kimberlite. One short train immediately down-ice of, and derived from, the Peddie kimberlite is defined by the minerals olivine and Mg-ilmenite, with elevated concentrations of Ni, Cr and Nb. A second dispersal train 800 m southwest of the Peddie kimberlite and trending southeast, is defined
by abundant Mg-ilmenite and Cr-pyrope, and elevated concentrations of Nb, and Ta. This second dispersal train is likely derived from the Gravel kimberlite 4 km up-ice (northwest) and/or an unknown kimberlite.
SHRIMP U-Pb detrital zircon geochronology of enigmatic Neoarchean-Paleoproterozoic sedimentary rocks of the central western Churchill Province, Nunavut; Radiogenic Age and Isotopic Studies: Report 15
Authors: Rainbird R H , Davis W J , Aspler L
B , Chiarenzelli J R , Ryan J
J
Published: November 2010

The dominant U-Pb age of detrital zircons in three stratigraphically enigmatic sandstone units from the central part of the western Churchill Province ranges from 2730.2660 Ma, demonstrating mainly local provenance from underlying volcanoplutonic belts and that
the units are younger than ca. 2.66 Ga. These ages are inconclusive for resolving the late Neoarchean versus early Paleoproterozoic depositional age of the sandstone units. A specimen from the Montgomery Group represents either a molasse developed late in the history of the underlying Neoarchean
Henik-Kaminak-Tavani greenstone belt or an early Paleoproterozoic precursor to the Hurwitz Group. Younger grains in a specimen from the Spi Group support the interpretation that it represents a ca. 2450 Ma rift deposit, coeval with the Kaminak mafic magmatic event. A prominent ca. 2680 Ma detrital
zircon mode in a specimen of quartzite from the Happy lake area and its aluminous composition are consistent with it being part of the lower Hurwitz Group.
Precise U-Pb dating of reversely magnetized Marathon diabase dykes and implications for emplacement of giant dyke swarms along the southern margin of the Superior Province, Ontario; Radiogenic Age and Isotopic Studies: Report 15
Authors: Hamilton M A , Davis D W , Buchan K L , Halls H C
Published: November 2010

Earlier paleomagnetic results revealed distinct paleopoles from 2121 +14/.7 Ma normally magnetized (N) and poorly dated, reversely magnetized (R) subsets of the north-trending Marathon diabase dyke swarm north of Lake Superior, suggesting that Nand R subsets are
of different ages. U-Pb baddeleyite ages, from independent laboratories, are presented here for two widely separated Marathon R dykes, and indicate magmatic crystallization at 2101.0 " 1.6 and 2101.8 " 1.9 Ma. Marathon R dykes are considerably older than reversed dykes of the northwest-trending 2076
+5/.4 Ma Fort Frances swarm west of Lake Superior, although the two dyke sets were thought to possibly belong to one giant radiating swarm, based on similar paleopoles. However, if a single radiating swarm is correct, the new results imply a relatively long lived (ca. 45 Ma) magmatic plume centre
that was tapped in ca. 20 to 25 Ma intervals. Dating of the Marathon Rdykes also establishes the R paleopole as a key- pole that can be used with confidence to establish a more accurate apparent polar wander path and more refined Paleoproterozoic continental reconstructions for
Laurentia.
Uranium-lead geochronology of Middle River rhyolite: implications for the provenance of basement rocks of the Bathurst mining camp, New Brunswick; Radiogenic Age and Isotopic Studies: Report 15
Authors: McNicoll V J , van Staal C R , Lentz D , Stern R
Published: November 2010

Thermal ionization mass spectrometry (TIMS) and sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon dating techniques were employed in this study to obtain the crystallization age and ages of xenocrystic zircon from a sample of the Middle River rhyolite
of the Bathurst mining camp, New Brunswick. A crystallization age of 479 " 6Ma constrains the timing of initial volcanism and refines the age of the boundary between the Tetagouche and Miramichi groups. Ages of xenocrystic zircon from Middle River rhyolite and synvolcanic Ordovician plutons range
from Cambrian to Archean and indicate a Gondwanan, as opposed to a Laurentian, basement.
Kinematic observations in the Yellowknife River Fault Zone and structures in the Jackson Lake Formation, Yellowknife Greenstone Belt, Northwest Territories
Authors: Martel E , Lin S , Bleeker W
Published: November 2010

Detailed structural mapping has confirmed the presence of the Yellowknife River Fault Zone. This major east-dipping Archean structure marks the contact between Banting Group volcanic rocks and the .Timiskaming-like. sedimentary rocks of the Jackson Lake Formation
in the south, and between Kam Group and Banting Group volcanic rocks in the north. Detailed analysis led to the recognition of four generations of ductile structures (G1 to G4) in the study area. The Jackson Lake Formation records only three of the four generations (G2, G3, and G4). The kinematics
and regional significance of G1 are poorly understood. G2 is best explained by east-side-up, dip-slip movement with a minor sinistral shear component. G3 and G4 are interpreted as dextral and sinistral shear, respectively.
Refraction seismic studies in Nares Strait between Ellesmere Island, Nunavut, and northwest Greenland
Authors: Funck T , Jackson H R , Reid I D , Dehler S A
Published: November 2010

A refraction/wide-angle reflection seismic experiment consisting of three lines in the Nares Strait region between Ellesmere Island and northwest Greenland was carried out from August 6 to September 8, 2001, as part of a multidisciplinary program. The overall
objective of the program is to provide new information on the origin of Nares Strait and shed insight on the controversy over its development. To
run the experiment in the ice-choked waters, Canada=s largest icebreaker, the CCGS Louis S. St. Laurent, was required along with two ship-based helicopters. The main refraction/wide-angle seismic line was located between Makinson Inlet on Ellesmere Island and Thule Air Base in Greenland. Initial
analysis of the seismic data shows a clearly defined high-amplitude Moho reflection with a lateral correlation of >150 km. Crustal thickness on the eastern end of the line (Greenland) is estimated to be approximately 35 km using a simple one-dimensional velocity
structure.
Fluid compositions and temperature-pressure conditions of intrusion-related gold systems in southwestern New Brunswick - a fluid-inclusion study
Authors: Chi G
Published: November 2010

Several gold occurrences discovered in the granite-dominated districts of southwestern New Brunswick share some similarities with a newly recognized type of intrusion-related gold systems. This paper presents fluid inclusion microthermometry data from four gold
occurrences in southwestern New Brunswick (Poplar Mountain, Clarence Stream, Jimmy Hill, and Kedron). These data suggest that mineralizing fluid systems for Poplar Mountain, Clarence Stream, and Jimmy Hill may be approximated by H2O-NaCl-CO2-CH4 (characteristic of the deeper part of the new type of
intrusion-related gold systems) and those for Kedron, byH2O-NaCl with high salinities (characteristic of the shallower part of the systems). Fluid temperatures are mainly 220°C to 280°C for Poplar Mountain, 180°C to 280°C for Clarence Stream, 230°C to 330°C for Jimmy
Hill, and 120°C to 200°C for Kedron. Fluid pressures are probably 785 to 1364 bars for Poplar Mountain, 594 to 1226 bars for Clarence Stream, and 965 to 1764 bars for Jimmy Hill.
Ice-margin seismic stratigraphy of the central Scotian Slope, eastern Canada
Authors: Piper D J W , Mosher D C , Newton S
Published: November 2010

Seismic reflection profiles along the upper Scotian Slope show a series of stacked till tongues interpreted to represent Pleistocene glacial maximum conditions. The deepest till unit immediately underlies regional reflector I, which marks a change from prodeltaic
to proglacial depositional style on the continental slope. Regional unconformities appear to follow deglaciation. Thick glacial-plume deposits are characteristic of deglacial periods and associated with till tongues. They are most prominent beneath regional reflector I, believed to be derived from
the Gulf of St. Lawrence, correlated with marine isotope stage 12 in a long pelagic core from the J-Anomaly ridge. This chronological tie allows consistent interpretation of ages of till tongues and proglacial facies. The deepest till tongue formed at the end of marine isotopic stage 10. Till
deposits in marine isotopic stage 12 are recognized only on the outermost shelf and did not extend to the slope.
Climate change, permafrost, and community infrastructure: a compilation of background material from a pilot study of Tuktoyaktuk, Northwest Territories
Authors: Couture R , Robinson S , Burgess M , Solomon S
Published: November 2010

With support from the Government of Canadas Climate Change Action Fund (CCAF), the Geological Survey of Canada (GSC) has initiated community case studies in which infrastructure sensitivity to the impacts of permafrost degradation under climate warming are
examined. Much of the infrastructure in northern communities relies on the properties of frozen materials for stability. As the Mackenzie valley and adjacent delta region has undergone the most warming (+1.7°C) over the last century in Canada (Environment Canada, 1995) and continued significant
warming is expected, warming of the ground could degrade the performance of many existing and future structures including roads, foundations, utilities, and embankments. This report is a summary of present permafrost, surficial geology, and infrastructure conditions in Tuktoyaktuk, selected as a
second pilot community for the project. The first selected pilot community was Norman Wells (Robinson et al., 2001). The material in the present report includes compilation of data and reviews of the community (history, population, services, economic activities), climatic conditions (current air
temperature and precipitation, general trends, and climate change), terrain conditions (surficial deposits as well as their geotechnical and geothermal properties), permafrost (distribution, temperature profiles, ground ice distribution), and infrastructure, including buildings, transportation,
communication, municipal service facility (past and present, associated foundation, maintenance history and performance). A brief discussion is presented on the effect of climate change on the infrastructure in Tuktoyaktuk and includes the possible costs associated with the development of adaptation
strategies.
Physiography and Tertiary base levels in the southern Interior Plateau and adjacent areas, southwestern British Columbia
Authors: Tribe S
Published: November 2010

Geomorphology, valley-fill geology, and drainage anomalies indicate that a suite of early Tertiary and older valleys occurs in the study area. Eocene relief and base level of the North Thompson River valley were the same as today,1000m and400mrespectively.The
valley predates the middle Eocene. TheThompson River from Kamloops to Martel follows the trend of a broad Eocene valley and is inset 125 to 350 m below the sub-Eocene unconformity. The Thompson River valley from Martel to Lytton and the Nicola, Nahatlatch, and Stein river valleys define a branching,
north-flowing drainage pattern that post dates the Eocene Fraser Fault. The Nicola Lake valley is probably Paleocene to Eocene. A former drainage divide existed along the Fraser River valley between Anderson River and Hell's Gate. Base level was about 500 m higher in the Miocene than in the Eocene.
Geological setting of the eastern Bella Coola map area, west-central British Columbia
Authors: Haggart J W , Mahoney J B , Diakow L J , Woodsworth G J , Gordee S M , Snyder L D , Poulton T P , Friedman R M , Villeneuve M
Published: November 2010

Jurassic and Cretaceous magmatic-arc volcanic and sedimentary strata are widely distributed across the eastern Bella Coola map area (NTS 93 D) in two northwest-trending outcrop belts. (?)Lower to Middle Jurassic arc rocks, found in the east, are correlative with
the youngest part of the Hazelton Group, distributed widely to the north. Lower Cretaceous volcano-sedimentary strata are found west of the principal Jurassic arc rocks and correlate with the Monarch volcanic deposits, widespread to the south. Plutonic suites of (?) Middle Jurassic, Cretaceous, and
Tertiary (Paleogene) ages increase volumetrically westward across the map area. Cretaceous plutonic rocks of ca. 122-119 Ma age may be comagmatic with the Monarch assemblage. East-west extension appears to have characterized both Hazelton Group and Monarch magmatism. Northwest-trending,
steeply-dipping ductile shear zones in the central and western parts of the
study area involve (?)Jurassic and (?)Cretaceous plutons but are cut by intrusions of Tertiary age.
Preliminary results of field mapping, GIS spatial analysis, and major-element geochemistry, Ruby Mountain volcano, Atlin volcanic district, northwestern British Columbia
Authors: Edwards B R , Bye A
Published: November 2010

We present results from fieldwork, GIS spatial analysis, and major-element whole-rock geochemistry completed between July 2000 and May 2002 for the Ruby Mountain volcano, in the northwestern Atlin map area (NTS 104 N/11). The map of the distribution of lava
flows, tephra, and volcanic breccia at the Ruby Mountain volcano enables the use of the Spatial Analyst tool in ArcView® 3.2 to calculate the surface areas of the lava flows and, subsequently, to estimate flow volumes. Preliminary analysis of whole-rock major-element results for 10 samples of
olivine-porphyritic volcanic rocks, including samples from the Ruby Mountain volcano (8), the Ruby Creek lava flow (1), and the Cracker Creek cone (1), show that all are alkaline and vary in composition from basalt to hawaiite to basanite.
Structural setting of the Cornwallis lead-zinc district, Arctic Islands, Nunavut
Authors: Dewing K , Turner E C
Published: November 2010

Zinc-lead mineralization of Devonian to Carboniferous age in the Cornwallis district is spatially related to faults and folds of the Boothia Uplift. The north-south elongate Boothia Uplift, formed during Caledonian (Late Silurian - Early Devonian) compression,
is characterized by west-verging, basementrooted thrusts and related folds in cover strata. Southward compression during the Ellesmerian Orogeny (Late Devonian - Early Carboniferous), perpendicular to these older faults, reactivated them as strike-slip structures. One effect of this reactivation
was the creation of transverse fracture zones where stress was transferred between basement blocks. Mineralizing fluids driven by the Ellesmerian Orogen migrated through these fracture zones and into permeable lower Paleozoic units. This style of mineralization is one of several present in the
Cornwallis lead-zinc district.
Structural study of Sudbury breccia and sulphide veins, Levack embayment, North Range of the Sudbury structure, Ontario
Authors: Legault D , Lafrance B , Ames D E
Published: November 2010

The ca. 2.7 Ga Levack gneiss complex underlies the Levack embayment and northern part of the Sudbury structure. Sudbury breccia, a unit of centimetre- to metre-scale clasts and blocks in a fine-grained to aphanitic matrix, occurs as veinlets, veins, and
irregular, disconnected, metre-wide massive bodies within wide breccia zones that cut the Levack gneiss complex. Sudbury breccia veins show no systematic orientations or displacements. Conjugate sets of chalcopyrite veins hosted by Sudbury breccia, and veins filled by hydrothermal minerals at the
Barnet showing, were emplaced in tensile fractures perpendicular to the gneissic foliation. Observations suggest that the Sudbury breccia originated by in situ brecciation during propagation of impact shock waves, rather than by milling and friction melting along superfaults during collapse of
impact crater walls. Sulphide veins were emplaced in tensile fractures that propagated
perpendicular to gneissic foliation and coincided with hydrothermal activity.
Interim results of the EXTECH-IV seismic-reflection program in the Athabasca Basin, northern Saskatchewan
Authors: White D J , Hajnal Z , Gyorfi I , Takacs E , Roberts B , Mueller C , Reilkoff B , Koch R , Powell B , Annesley I , Bernier S , Jefferson C
Published: November 2010

Interim results from the EXTECH-IV 2000 seismic-reflection program at the McArthur River mine site include interpretations of the two-dimensional high-resolution and regional profiles, simulated seismic responses for the P2 orebody, and preliminary images from
the pseudo three-dimensional survey. Interpreted seismic-reflection data 1) accurately image the sandstone-basement unconformity at a depth of approximately 400 to 600 m; 2) map its offset by the P2 reverse fault; and 3) trace the extension of the 2.5km thick P2 fault system upward through the
overlying Athabasca Group sandstone and downward more than 4 km as a listric structure that curves past the southeastern limit of the survey. Lateral variations in sandstone porosity, silicification, or facies changes are inferred from variable reflection response and velocity variations, and
angular discordances in stratigraphy suggest onlaps or unconformities that may have resulted from tectonic control on sedimentation. A reflection response from the vicinity of the orebody is apparent. The entire survey and a LITHOPROBE survey to the east are underlain by a bright reflector
interpreted as an extensive thick sill, at a depth of approximately 6 km, that may be associated with the Mackenzie Igneous Event (1.265 Ga).
Regional structural data from the Hay River area, Northwest Territories, with emphasis on the Pine Point mining camp
Authors: Turner W A , Gal L P
Published: November 2010

A regional study undertaken south of Great Slave Lake, Northwest Territories, focused on evaluating evidence for structural control on mineralization at Pine Point. Relatively consistent northeastsouthwest (055°) and northwest-southeast (125°,
140°, 150°, and 160-165°) joint sets were observed in the study area. A dominant east-west (085°) joint set was observed in one domain. The orientation of the 055°
set is close to that of the Great Slave Lake Shear Zone (045° at Pine Point) and the Hay River Fault (055°; west side of study area).
Previous studies conducted on ore-mineral paragenesis at Pine Point proved that hydrothermal dolomite occurred concurrently with the ore-deposition event. This study demonstrates that fracturing at Pine Point pits largely postdated dolomitization, and therefore ore deposition. Furthermore, no
structural controls on mineralization were observed in the pits, and are therefore not considered a primary mechanism for ore emplacement in the Pine Point orebodies.
Field procedures and results of groundwater sampling in kimberlite from drillholes in the Kirkland Lake and Lake Timiskaming areas, northeastern Ontario
Authors: Sader J A , Leybourne M I , McClenaghan M B , Hamilton S M , Robertson K
Published: November 2010

A hydrogeochemistry study of the Lake Timiskaming and Kirkland Lake kimberlite fields was undertaken as part of the Geological Survey of Canada's Targeted Geoscience Initiative (TGI). The goals are to understand the hydrogeology and geochemistry of groundwater in
kimberlite compared with the surrounding Archean rocks and to develop a useful kimberlite exploration tool. Groundwater in holes
drilled by exploration companies in the 1980s was sampled at five kimberlite pipes: B30, C14, A4, Diamond Lake, and 95-2. The water was measured in the field for pH, oxidation-reduction potential (Eh), dissolved oxygen, electrical conductivity, and temperature. Preliminary field results indicate
that many pH values are unusually high for natural groundwater, with pH levels in B30, C14, and A4 as high as 11.00 to 12.45. Field analyses and pump-recovery tests reveal that a link may exist between the hydration of olivine and the production of CH4 and H2 and groundwater
flow.
Tracking the Wakeham Group volcanic rocks and associated copper-iron oxide hydrothermal activity from La Romaine eastward, eastern Grenville Province, Quebec
Authors: Corriveau L , Bonnet A -L , van Breemen O , Pilote P
Published: November 2010

The last field season of the Targeted Geoscience Initiative Eastern Grenville Transect in Quebec unveiled a < 10 km wide by 50 km long southeastern extension of the Wakeham Group, host to an extensive cupriferous hydrothermal system. The supracrustal
rocks consist of granulite-facies metasandstone, 1.5 Ga lapillistone, amphibolite, marble, and calc-silicate rock enclosed within a metamorphosed, 1.5 Ga Pinwarian subvolcanic batholith. High-grade metamorphism in this belt would traditionally be seen as an impediment to mineral exploration.
However, we have recognized and traced an extensive zone of aluminous gneiss that records strong hydrothermal leaching of metavolcanic units. Amphibolite occuring structurally above and likely serving as a caprock contains garnetite, diopsidite, and hornblendite and provides an effective guide to
the site of fluid discharge and mineralization.Anumber of showings were discovered; their systematic occurrence, in a structural and stratigraphic sense, suggests that, although this supracrustal belt is of modest size, it should be explored.
Stratigraphy, structure, and petrology of a representative klippe of the Bravo Lake Formation, Piling Group, central Baffin Island, Nunavut
Authors: Stacey J R , Pattison D R M
Published: November 2010

The stratigraphy, structure, metamorphism, and mineral-deposit potential of a prospective type area for the Paleoproterozoic Bravo Lake Formation has been characterized in a well exposed klippe. The klippe is in thrust contact with underlying metaturbidite of the
Longstaff Bluff Formation. The Bravo Lake Formation overlies a rusty, strongly sheared metasedimentary basal unit immediately above the
thrust contact. The formation in the klippe comprises a lower volcanic unit, pillow basalt, siliciclastic and chemical metasedimentary rocks intruded by ultramafic sills, an upper volcanic unit, and an upper metasedimentary unit containing laminated sulphide pods. Exposures east of the klippe
preserve a higher volcanic unit not seen in the klippe. Peak metamorphism (approximately 650°C, 3.0-4.0 kbar) postdates major fabric-forming deformation events. Ultramafic rocks in the klippe could potentially host magmatic sulphide deposits,
and some metasedimentary rocks could potentially host exhalative sulphide deposits.
EXTECH IV Athabasca uranium multidisciplinary study of northern Saskatchewan and Alberta, Part 1: overview and impact
Authors: Jefferson C W , Delaney G , Olson R A
Published: November 2010

Fifteen subprojects have evolved within the EXTECH IV project, from data acquisition through interpretation to integration. These subprojects address two goals: 1) improvement of the Athabasca Basin geoscience framework by (a) mapping basement domains and their
boundaries, relating uranium ore to reactivation structures and paleovalleys; (b) quantitative litho/sequence stratigraphy across drill camps and six regional deposystems; (c) refinement of alteration vectors to ore; (d) new SHRIMP (Sensitive High Resolution Ion Microprobe) standards for dating
uraninite, and detrital U-Pb ages to constrain stratigraphy; (e) seismic imaging of stratigraphy, unconformity and P2 reverse fault zone; (f) paragenesis of organic matter; and (g) GIS databases; and 2) developing EXploration TECHnology (gamma-ray and multiparameter borehole geophysics, seismic
reflection, gravity, and magnetotellurics) to calibrate ore,
host-rock, and alteration parameters of the world-class McArthur River camp for deep exploration in the Athabasca Basin. Better decision-making, new staking, new ideas, and training of ten young scientists support northern sustainable development.
First look at data from a three-dimensional audio-magnetotelluric survey at the McArthur River mining camp, northern Saskatchewan
Authors: Craven J A , McNeice G , Powell B , Koch R , Annesley I R , Wood G , Mwenifumbo J
Published: November 2010

As part of EXTECH IV, three-dimensional audio-magnetotelluric data were collected in the McArthur River uranium mining camp, northern Saskatchewan. One hundred and thirty five audiomagnetotelluric stations were acquired along 11 profiles over the P2 and P2 North
mineralized zones with an average site spacing of 300 m. The new audio-magnetotelluric data extend the coverage of an earlier
two-dimensional survey and were acquired to provide a three-dimensional view into the subsurface conductivity structure of the McArthur River deposit, the overlying Athabasca Group sandstone, the basement rock types and offsets, and the alteration assemblages associated with the deposit. Digital
comb filters were tuned to and removed strong harmonics; then robust audio-magnetotelluric responses were calculated. The resulting induction arrows map different domains of coherent and complex electrical strike. Data qualities and distribution are ideal for the next stage-calculation of a
three-dimensional audio-magnetotelluric model.
Vulnérabilité à la nappe des aquifères fracturés du sud-ouest du Québec : évaluation par les méthodes DRASTIC et GOD
Authors: Murat V , Paradis D , Savard M
M , Nastev M , Bourque E , Hamel A , Lefebvre R , Martel R
Published: November 2010

This study presents an assessment of the vulnerability of regional aquifers as part of the Geological Survey of Canada project of characterization of fractured-rock aquifers in southwestern Quebec. Vulnerability assessment uses the physical properties of the
setting to evaluate the sensitivity of groundwater to all types of pollutants introduced from the ground surface. Two methods, DRASTIC and GOD,
were used for comparison purposes. Results indicate that the DRASTIC method yields a more detailed assessment. This method shows the higher vulnerability areas as coinciding with recharge zones in the northern, northwestern and southeastern parts of the study area, with the lower vulnerability areas
located where clay cover is significant. When theGODmethod is used, the entire study area appears to have moderate vulnerability, which is not an adequate representation of the region.
Digital compilation of vegetation types of the Mackenzie Valley transportation corridor
Authors: Wright J F , Duchesne C , Côté M
M
Published: November 2010

The vegetation maps were originally prepared by the Forest Management Institute of the Canadian Forestry Service for the Environmental-Social Program of the Task Force on Northern Oil Development. They were subsequently digitized by Natural Resources Canada
(Geological Survey of Canada) for use in a ground thermal modeling project. Secondary benefit of digitizing the 1974 paper maps was data preservation to a digital format easily accessible in a Geographic Information System. The data represent a broad classification of the vegetation in the Mackenzie
Valley Transportation Corridor, which stretches along the Mackenzie River, Northwest Territories, from the Alberta border to the Beaufort Sea (10° of latitude). Included in the dataset are information on species composition, and canopy height and density of the forest cover. Landform modifiers
are also included for areas of tundra vegetation. The vegetation was interpreted from black and white panchromatic aerial photographs taken between 1970 and 1972. Additional infrared colour photography was taken in 1971 and 1972 to cover a small portion of the area. Field checks of the maps took
place at 314 sites in 1971 and 1972.
Fourth generation seismic hazard maps of Canada: values for over 650 Canadian localities intended for the 2005 National Building Code of Canada
Authors: Adams J , Halchuk S
Published: November 2010

We summarize the methods being used for the new seismic hazard maps of Canada and estimate median ground motion on firm soil sites for a probability of exceedence of 2% in 50 years. Spectral acceleration at 0.2, 0.5, 1.0 and 2.0 second periods and peak
acceleration will form the basis of the seismic provisions of the 2005 National Building Code of Canada. We tabulate values for more than 650 localities to be listed in the next Code and include maps of seismic hazard for Canada. The four spectral parameters will allow the construction of
approximate uniform hazard spectra for each listed locality, and hence improve earthquake- resistant design. For comparison to NBCC 1995, selected 10% in 50 year hazard values are also given.
Ages of several xenotime megacrysts by ID-TIMS: potential reference materials for ion microprobe U-Pb geochronology
Authors: Stern R A , Rayner N
Published: November 2010

Four museum specimens of xenotime were tested for homogeneity in their U-Pb ages using isotope dilution - thermal-ionization mass spectrometry (ID-TIMS). The U-Pb ages of the samples ranged from about 500 Ma to 1020 Ma. Sample z6413, from a granitic pegmatite in
the Grenville Province, yielded homogeneous 206Pb/238U and 207Pb/206Pb ages of 994 Ma and 997 Ma, respectively. This sample was selected as a primary candidate reference material for ion microprobe U-Pb geochronology. A second sample, z6410, yielded 206Pb/238U and 207Pb/206Pb ages of 897 Ma and 901
Ma, respectively, and is a potential secondary standard. The other samples displayed significant age heterogeneities, including the effects of Pb loss, making them unsuitable as standards.
Structural evolution of the Woodburn Lake group in the area of the Meadowbank gold deposit, Nunavut
Authors: Hrabi R B , Barclay W A , Fleming D , Alexander R B
Published: November 2010

The Meadowbank gold project consists of five deposits hosted in the Neoarchean Woodburn Lake group of the western Churchill Province, including the recently delineated Vault deposit, located 7 km north-northeast of the previously defined mineralized zones in the
'Third Portage Lake' area. The supracrustal rocks of the Meadowbank area have experienced a polyphase deformation history spanning the Neoarchean to Paleoproterozoic. This contribution discusses the stratigraphic and structural framework of the corridor of rocks between the Meadowbank gold deposits
and the recently discovered Vault deposit to the north.
SHRIMP U-Pb ages of granitoid basement rocks of the southwestern part of the Athabasca Basin, Saskatchewan and Alberta
Authors: Stern R A , Card C D , Pana D , Rayner N
Published: November 2010

Zircons from seven granitoid samples from the southern and southwestern margins of the Athabasca Basin were dated using the SHRIMP II ion microprobe. A granite from the Virgin River shear zone was imprecisely dated at ca. 1.83 Ga. Two samples from the eastern
Lloyd Domain both crystallized at ca. 1.98 Ga. These rocks were either sourced within, or intruded, 2.4 - 2.0 Ga crust. The Clearwater Domain
comprises 1.843 Ga granite and 2.53 Ga granitic gneiss. Two granodioritic rocks within the basement at the western edge of the basin crystallized at 1.97 Ga. The new ages indicate that a considerable proportion of the basement to the western half of the Athabasca Basin is underlain by rocks related
to the Taltson magmatic zone.
The Seed and Triple B kimberlites and associated glacial sediments, Lake Timiskaming, Ontario
Authors: McClenaghan M B , Kjarsgaard B A
Published: November 2010

In 200 l and 2002, shallow trenches were excavated by the Geological Survey of Canada into the Seed and Triple B kimberlites, ill the northeast part of Firstbrook Township, near Lake Timiskaming, Ontario. The Triple B kimberlite was discovered by the Geological
Survey of Canada in 2001. The purposes of studying these two kimberlites are to docu­ment kimberlite mineralogy as well as glacial dispersal patterns associated with the kimberlites The Triple B kimberlite is intrusive into Paleoproterozoic argillites (Firstbrook Member of the Gowganda Formation)
but may also be, in part, intrusive into Nippising diabase. The Seed kimberlite subcrop, excavated by GSC in 2001, is a pelletal textured kimberlite breccia (>15% clasts larger than 4 nun), with the clasts dominantly argillite and limestone, with minor diabase. It's radiometric age of
153.7± 1.8 Ma suggests the Seed kimberlite is amongst the oldest of the eight Lake Timiskaming field kimberlites dated so far, which vary from 155.4 ±1.5 Ma to 133.9±1.5 Ma in age. At the northern contact of the main Triple B kimberlite body with Firstbrook argillite, is hypabyssal
aphanitic kimberlite. This aphanitic kimberlite grades into 'normal' looking olivine macrocrystic hypabyssal kimberlite. Approximately 13 m from the north contact is diatreme kimberlite microbreccia which is altered in its southernmost part. A narrow hypabyssal phlogopite spinel calcite kimbernite
dyke trending approximately 310o subcrops west of the main kimberlite body. Based on caustic fusion results of small samples, the diamond potential of the Seed and Triple B kimberlites is suggested to be low. Airborne and ground magnetic surveys clearly show the negative magnetic anomalies
associated with the Seed and Triple B kimberlites, as well as two untested negative magnetic anomalies nearby. The relative abundance of kimberlite indicator minerals in the Seed kimberlite is Mg-ilmenite >>Cr-pyrope >Cr-diopside > chromite >
olivine. The relative abundance of kimberlite indicator minerals in the Triple B kimberlite is Mg-ihnenite >> Cr-diopside > Cr­pyrope > olivine > chromite. These relative abundances are different from other kimberlites in the Lake Timiskaming
field and can be used to distinguish then· dispersal trains from dispersal trains derived from other nearby kimberlites.
Geology, Wijinnedi Lake area, Northwest Territories
Authors: Henderson J B
Published: November 2010

Wijinnedi Lake map area The Wijinnedi Lake area, a 1:50 000 scale map sheet in the southwestern Archean Slave Province, is divided into four lithotectonic domains. The three western domains are separated by Archean ductile shear zones. In the northwest, the
structurally highest Wijinnedi domain consists of a 2670 Ma Yellowknife Supergroup felsic volcanic centre in part mantled by more mafic volcanic rocks that are overlain by tightly to isoclinally folded pelite dominated siltstone-fine greywacke turbidite sequence. The lower pressure facies series
metamorphic grade ranges from lower greenschist to middle amphibolite but reaches migmatite grade locally at the east end of the domain. To the south the Hinscliffe domain consists mainly of a poly-phase, in large part recrystallized, ca. 2.65 Ga trondhjemite complex complexly intruded by mafic
amphibolite synplutonic dykes. To the southeast, the Ghost domain, representing midcrustal structural levels is dominated by plutonic bodies with the areally most extensive tonalite and related tonalite gneiss intruded about 2.64 to 2.63 Ga while a group of mainly granite intrusions were emplaced at
about 2.60 Ga. The less abundant Yellowknife Supergroup pelitic metasedimentary rocks and intermediate volcanic rocks are represented by migmatites. Most of the domain is at granulite grade with most of the plutonic bodies crystallizing under granulite grade conditions. The Dauphinee domain in the
eastern part of the area, separated from the high grade rocks to the west by a Paleoproterozoic cataclastic shear zone, consists mainly of quartz dioritic to granitic rocks and minor metasedimentary migmatites that are not at granulite grade.
Surficial geology, Frobisher Bay, Baffin Island, Nunavut
Authors: Hodgson D A
Published: November 2010

This surficial materials map is one of seven describing central and western Meta Incognita Peninsula as well as the head of Frobisher Bay, at the southeast extremity of Baffin Island. The communities of Iqaluit and Kimmirut lie within these seven maps. Weathered
to unaltered rock is the most extensive surficial material; it is divided on the basis of decreasing susceptibility to weathering into five units. Mappable till covers a minority of the map area; elsewhere, pockets of thin till overlie bedrock. The single till unit is clast supported with an acidic
silty sand matrix, though a silty matrix-supported till is discontinuously present on the southeast coast. Clasts are boulder and cobble Shield rocks of local origin. Thickest till is in the Frobisher Bay Moraine System (FBM) which is composed of multiple end moraine ridges on the flanks
of Frobisher Bay (linear on the north side, where ice pushed upslope, convoluted on the south side in ridges and valleys) and a thick till belt farther west (looping down the regional slope). The area southeast of Markham Bay also has a thick till cover.
Subglacial and proglacial aqueous deposits and landforms are prominent locally. The most common are sand and gravel subaerial glaciofluvial deposits concentrated in the FBM adjacent to Frobisher Bay; farther west, valley trains follow preglacial valleys to Hudson Strait. Raised glaciomarine deposits
in the form of proglacial deltas are present where FBM intersects coasts (Frobisher and Markham bays) and where valley trains terminate. Thick, silty marine deposits are patchy around Frobisher Bay; on the southeast Hudson Strait coast calcareous silty till indicates source ice was in the strait.

There is no terrestrial record of glaciers predating the last (Late Wisconsin) glaciation other than cirques. Striations, rock and till drumlins and till lineations indicate last glacial ice flowing from local, Foxe Ice Dome, down-Hudson Strait and cross-strait sources. The dominant flow was
generally southeast across Baffin Island from the Foxe Ice Dome and this was also responsible for the late glacial readvance into the head of Frobisher Bay (to FBM).
Surficial geology, Hidden Bay, Baffin Island, Nunavut
Authors: Hodgson D A
Published: November 2010

This surficial materials map is one of seven describing central and western Meta Incognita Peninsula as well as the head of Frobisher Bay, at the southeast extremity of Baffin Island. The communities of Iqaluit and Kimmirut lie within these seven maps. Weathered
to altered rock is the most extensive surficial material; it is divided on the basis of decreasing susceptibility to weathering into five units. Mappable till covers a minority of the map area; elsewhere, pockets of thin till overlie bedrock. The single till unit is clast supported with an
acidic silty sand matrix, though a silty matrix-supported till is discontinuously present on the southeast coast. Clasts are boulder and cobble Shield rocks of local origin. Thickest till is in the Frobisher Bay Moraine System (FBM) which is composed of multiple end moraine ridges on the flanks of
Frobisher Bay (linear on the north side, where ice pushed upslope, convoluted on the south side in ridges and valleys) and a thick till belt farther west (looping down the regional slope). The area southeast of Markham Bay also has a thick till cover. Subglacial and proglacial aqueous deposits and
landforms are prominent locally. The most common are sand and gravel subaerial glaciofluvial deposits concentrated in the FBM adjacent to Frobisher Bay; farther west, valley trains follow preglacial valleys to Hudson Strait. Raised glaciomarine deposits in the form of proglacial deltas are
present where FBM intersects coasts (Frobisher and Markham bays) and where valley trains terminate. Thick, silty marine deposits are patchy around Frobisher Bay; on the southeast Hudson Strait coast calcareous silty till indicates source ice was in the strait.

There is no terrestrial record of glaciers predating the last (Late Wisconsin) glaciation other than cirques. Striations, rock and till drumlins and till lineations indicate last glacial ice flowing from local, Foxe Ice Dome, down-Hudson Strait and cross-strait sources. The dominant flow was
generally southeast across Baffin Island from the Foxe Ice Dome and this was also responsible for the late glacial readvance into the head of Frobisher Bay (to FBM).
Surficial geology, Crooks Inlet, Baffin Island, Nunavut
Authors: Hodgson D A
Published: November 2010

This surficial materials map is one of seven describing central and western Meta Incognita Peninsula as well as the head of Frobisher Bay, at the southeast extremity of Baffin Island. The communities of Iqaluit and Kimmirut lie within these seven maps. Weathered
to unaltered rock is the most extensive surficial material; it is divided on the basis of decreasing susceptibility to weathering into five units. Mappable till covers a minority of the map area; elsewhere, pockets of thin till overlie bedrock. The single till unit is clast supported with an acidic
silty sand matrix, though a silty matrix-supported till is discontinuously present on the southeast coast. Clasts are boulder and cobble Shield rocks of local origin. Thickest till is in the Frobisher Bay Moraine System (FBM) which is composed of multiple end moraine ridges on the flanks
of Frobisher Bay (linear on the north side, where ice pushed upslope, convoluted on the south side in ridges and valleys) and a thick till belt farther west (looping down the regional slope). The area southeast of Markham Bay also has a thick till cover.
Subglacial and proglacial aqueous deposits and landforms are prominent locally. The most common are sand and gravel subaerial glaciofluvial deposits concentrated in the FBM adjacent to Frobisher Bay; farther west, valley trains follow preglacial valleys to Hudson Strait. Raised glaciomarine deposits
in the form of proglacial deltas are present where FBM intersects coasts (Frobisher and Markham bays) and where valley trains terminate. Thick, silty marine deposits are patchy around Frobisher Bay; on the southeast Hudson Strait coast calcareous silty till indicates source ice was in the strait.

There is no terrestrial record of glaciers predating the last (Late Wisconsin) glaciation other than cirques. Striations, rock and till drumlins and till lineations indicate last glacial ice flowing from local, Foxe Ice Dome, down-Hudson Strait and cross-strait sources. The dominant flow was
generally southeast across Baffin Island from the Foxe Ice Dome and this was also responsible for the late glacial readvance into the head of Frobisher Bay (to FBM).