bluuebunny/crossref_metadata_2025 huggingface dataset:
Quaternary geology digital map of the Reindeer Lake North area (64E), Saskatchewan
Authors: Bélanger J R
Published: November 2010

README file: This Open File contains a digital version of the polygon data (map units) of "Quaternary Geology of the Reindeer Lake North Area 64 E Saskatchewan", Saskatchewan Research Council, Open File Report 84-10 (B.T. Schreiner, 1984), previously released on
paper at a scale of 1:250,000. The information has been processed by the GIS Arc/Info and is released in E00 and DXF formats with permission from the author.
The files 64EDXF.EXE and 64EE00.EXE are self extracting by copying the files to a hard drive and typing 64EDXF or 64EE00. The uncompressed 64EDXF.EXE file includes two files: S64E.DXF (surficial geology) and H64E.DXF (Hydrography), the 64EE00.EXE file includes two files: S64E.E00 (surficial
geology) and H64E.E00 (hydrography) The hydrography was obtained from the Digital Chart of the World at 1:1 000 000, and is included to serve as general reference for the geology (digitized at 1:250 000).
For further information on the format of the data please call Andrew Moore, Geological Survey of Canada, Tel.: 613-943-0776.
Trial seismic hazard maps of Canada - 1995: final values for selected Canadian cities
Authors: Adams J , Halchuk S , Basham P W , Weichert D H
Published: November 2010

We summarize the methods being used for new seismic hazard maps of Canada, tabulate final values of the 50th and 84th percentile ground motions for major cities, and give uniform hazard spectra, ail for sites on firm soil at a 10% probability of exceedence in
50 years. The availability of strong ground motion relations for spectral parameters allows computation of spectral acceleration maps, which are being recommended as input to the seismic provisions of the National Building Code.
Le dyke de minette de Rivard et le complexe gneissique cuprifère de Bondy; implications tectoniques et métallogéniques pour la région de Mont-Laurier, province de Grenville, Québec
Authors: Corriveau L , Tellier M L , Dorin D , Amelin Y , van Breemen O
Published: November 2010

Quartzofeldspathic gneiss complexes are common among the supracrustal rocks of the Central Metasedimentary Belt, Grenville orogen, Québec. At reconnaissance scale, these complexes comprise a monotonous assemblage of granitoids and granulite facies gneisses.
The Bondy gneiss complex, however, could be a rernnant volcano-plutonic complex with felsic orthogneisses hosting a 1240 Ma tonalitic pluton to the south and, to the north, supracrustal rocks with the remains of a Cu-bearing sub-marine hydrothermal system. Previously considered sterile, the complex
includes, within a folded 12 km long by 100 m wide band, a Cu showing (6540 ppm), garnetites, tourmalinites, sillimanite and quartz gneisses, magnesian gneisses with cordierite, bronzite, kornerupine and tourmaline, and layered metabasite and quartzofeldspathic gneisses. In contrast to the
supracrustal rocks in the area, the Mg-rich, Fe-rich and Al-rich lithofacies have very low Ca but are locally enriched in Na, K or Zr. They are interpreted as granulite facies equivalents of hydrothermally altered rocks and the garnetites as metamorphosed exhalites. The association of copper,
Mg-rich alteration and rocks with a possible volcanic origin suggests a volcanogenic massive sulfide-type setting and indicates that the nature and economic potential of the gneiss complexes in the Mont-Laurier area need to be reassessed. The Rivm·d ultrapotassic minette dyke contains 40 to
70% exotic and locally derived xenoliths. It was emplaced at 1.08 Ga in the Bondy gneiss complex and has sampled an extensive section of the lithosphere. It includes fragments of dunite, wehrlite, websterite, clinopyroxenite, mafic granulite, gabbro, metabasite, cale-silicate rock, granitoid,
gneiss and quartzite. The ultramafic and mafic granulites xenoliths are Paleo- and Mesoproterozoic in age and have reequilibrated at maximum pressure ofca. 20-25 kbar. None of the xenoliths studied are in isotopie equilibrium with the source of the potassic magmas. Estima tes of the viscosity of the
host minette magma indicates that it was initially extremely fluid and rose at more than 50 cm/s. During ascent, it fragmented and delaminated the country rock to such an extent that its effective viscosity increased greatly and the magma solidified at a deep crustal level. The isotopie study of the
K-rich alkaline magmas indicate that the mantle below the Mont-Laurier area was enriched during a subduction event around 1.3 Ga. Such an event would not only account for the arc signature of magmas in the Central Metasedimentary Belt but also for the series of rock types observed in the Bondy
gneiss complex.
Bedrock geology, Whycocomagh 11F/14, Cape Breton Island, Nova Scotia
Authors: Lynch G ,   Geological Survey of Canada, Brisson H , Stevens J
Published: November 2010

The Visean Windsor and Namurian Mabou groups in the River Denys basin of southwest Cape Breton Island are allochthonous above the Ainslie Detachment and Macumber Formation. A ramp and fiat geometry is documented; the upper fiat occurs beneath the Namurian Mabou
Group which has been transported down-section towards the southwest onto the basal detachment at the top of the Macumber Formation. A roll over anticline of Mabou Group and upper Windsor Group lithologies is found to the west. Movement on the detachment has stripped away thick evaporitic units of
the Lower Windsor Group, effectively breaching a regional aquiclude and placing overlying carbonates onto the principal basin aquifer, creating a favourable environment for Pb-Zn mineralization. Thickness variations within coarse clastic rocks and pinch-out of the underlying Horton Group may also
have focused basin fluids.
Geoscience compilation of northern Baffin Island and northern Melville Peninsula, Northwest Territories
Authors: de Kemp E A , Scott D J
Published: November 2010

The contents of this CD represent the culmination of a one-year geoscience compilation for the North Baffin and Northern Melville Peninsula region in the new Nunavut territory. The project was co-sponsored by the Geological Survey of Canada, Qikiqtaaluk
Corporation, Indian and Northern Affairs Canada and the Government of Northwest. The purpose of this project is to make information about the rocks and soils of the area easier to obtain, to understand, and to use by providing geoscience information to northern communities and the general public.
Potential applications include land-use planning and management, education and mineral exploration.
This geoscience knowledge base is a seamless, multi-thematic integrated data set. Geoscience data layers include 1:500 000-scale bedrock geology, surficial geology, mineral occurrences and metallogenic domains, geophysical and geochronological data and Precambrian fossil localities. Underlying this
information is a seamless topographic base with lakes, drainage, coastlines and elevation data. Hard copy maps of bedrock geology (GSC Open File 3633, 1:500 000), surficial geology (GSC Open File 3634, 1:500 000) and metallogenic domains with mineral occurrences (GSC Open File 3635, 1:1 000 000)
have been derived from this knowledge base.
Selected geoscience data from the Western Churchill NATMAP project, Kivalliq region, Nunavut, Volume I
Authors: Wilkinson L ,   Western Churchill NATMAP Geoscience Team
Published: November 2010

Traditionally, geoscience data is stored in analog format, however, with the advent of easy to use GIS software, more and more data is now generated and stored in digital format. This allows for easier archiving of the data and for easier sharing of information,
a key factor with fewer resources available to both public and private sectors. A large component of all NATMAP (National Mapping Programme) projects is the compilation of a digital database of geoscience data, and the release of this data to the public as quickly as possible. The goal of the
"Selected Geoscience Data from the Western Churchill NATMAP Project, Kivalliq Region, Nunavut - Volume I" CD-ROM release is thus to provide an initial archive of existing and new, digital Western Churchill (approximately 60-68N and 88-104W) data in standard, easy to use formats that allow both
novice and expert GIS users to quickly extract and use the information they need. The data contained on this CD-ROM incorporates Geological Survey of Canada (GSC), Resource, Wildlife and Economic Development (RWED) of the Government of the Northwest Territories (GNWT) and Department of Indian and
Northern Affairs (DIAND) geoscience data compiled and re- formatted under the auspices of the Western Churchill NATMAP project. Each data set on the CD-ROM is an independent Open File (GSC) or EGS-series (GNWT or DIAND) data set published by the authors noted in the user guide and metadata files.
In all cases, the digital data presented on this CD-ROM are also available in analog format from the appropriate agency. Detailed information and references for each data set are provided on the CD- ROM. The data are provided in Arc/Info and common interchange formats (DXF and Arc/Info-E00, DBF,
TIF, Microsoft-Excel ) in a standard UTM zone 15, NAD 27 projection. ArcExplorer is provided on the CD-ROM as a data viewer for PC-clients (see http://www.esri.com/software/ for more information). Although the CD-ROM conforms to the ISO-9660 system- independent standard and works identically on a
PC, Macintosh or UNIX workstation, no viewer is provided for Macintosh or UNIX users. Data sets provided include bedrock geology, surficial geology, till geochemistry, geophysical data, geochronology data and mineral occurrences.
Mineralogy and geochemistry of the C14 kimberlite and associated glacial sediments, Kirkland Lake, Ontario
Authors: McClenaghan M B , Kjarsgaard I M , Stirling J A R , Pringle G , Kjarsgaard B A , Berger B
Published: November 2010

The Geological Survey of Canada investigated four kimberlite pipes in the Kirkland Lake area, northeastern Ontario to document indicator signatures in glacial sediments. This report focuses on results from the C14 kimberlite in Clifford Township. The kimberlite
has been eroded down by preglacial and glacial weathering to a level approximately 20 to 30 m below the surrounding bedrock. The subcropping surface consists of heterolithic tuffisitic kimberlite breccia. Kimberlite indicator minerals of the C14 pipe are dominated by Cr pyrope and chromite (±
Cr-diopside) derived from lherzolitic xenoliths with only a minor proportion from harzburgite and dunite sources. No evidence of eclogitic xenoliths in the C14 kimberlite were found in this study. The low numbers of Cr-poor pyrope, diopside and Mg-ilmenite point to a low contribution from the
Cr-poor megacryst suite which can be dominant in other kimberlites in the Kirkland Lake kimberlite field. The presence of subcalcic garnet and Cr-rich and (magnesio-) chromite suggests a moderate diamond potential for the Cl4 pipe. The relative abundance of indicator minerals in the C14 kimberlite,
listed in decreasing order of abundance, is: pyrope > Cr-diopside > chromite > Mg-ilmenite. These relative abundances are mimicked in till overlying and just down-ice of the kimberlite. Indicator mineral chemistry for grains recovered from the glacial sediments
around the C14 kimberlite are also similar to that for the kimberlite. Kimberlite samples from the C14 pipe contain tens of thousands of indicator mineral grains in 10-kg. Incorporation of kimberlite into the till is obvious overlying the Cl 4 kimberlite and just down-ice and is reflected in all
size fractions of till. The non-ferromagnetic heavy mineral fraction (coarse to fine sand) of till contains anomalous concentrations of indicator minerals (tens to thousands of grains) and displays elevated concentrations of Cr, Sr, Ta, La, Ce, and Eu. The <0.063 mm (silt+clay) fraction
has elevated concentrations of Ba, Co, Cr, Tot Fe, K, Mg, Ni, Sr and Ti and the pebble sized-fraction contains several kimberlite clasts.
Geology, magnetic, and gravity maps of Manitoba: a digital perspective
Authors: Viljoen D , Chackowsky L , Lenton P , Broome H J
Published: November 2010

Traditionally, geoscience data is stored in analog format, however,
with the advent of easy to use GIS software, more and more data is
now generated and stored in digital format. This allows for easier
archiving of the data and for easier sharing of information, a key
factor with fewer resources available to both public and private
sectors.

The data contained on this CD-ROM incorporates Manitoba Energy and
Mines mapping and Geological Survey of Canada (GSC) geoscience data
compiled and re-formatted for for digital release. It also contains
data created manually and imported from other sources. All of the
data is royalty-free. Information about the individual datasets can
be found in the documentation (refer to \INDEX.HTM).

The data are provided in ARC/INFO and common interchange formats (DXF and
ARC/INFO E00, DBF, etc.) in UTM zone 14 projection and NAD 27 datum.

ArcExplorer is provided on the CD-ROM as a data viewer for PC clients
in \software\explorer\aeclient.exe. Refer to http://www.esri.com/software/
for more information).

The CD-ROM conforms to the ISO-9660 system-independent standard and works
identically on a PC, Macintosh or UNIX workstation, however, no viewer is
provided for Macintosh or UNIX users.
Focal mechanisms for eastern Canadian earthquakes: 1 January 1996 - 30 June 1998
Authors: Bent A L , Perry C
Published: November 2010

Although, earthquake focal mechanism solutions provide information about the faults on which the earthquakes occur and on local stress field orientations and seismotectonics, they are not routinely determined for eastern Canadian earthquakes. We have attempted to
determine focal mechanisms for all eastern Canadian earthquakes of magnitude 4.0 or greater that occurred from 1 January 1996 to 30 June 1998. Of the twenty-one earthquakes that fit the selection criteria, only three had previously determined focal mechanisms. We were able to obtain well-constrained
focal mechanisms for twelve of the remaining eighteen events. The six for which solutions could not be determined occurred in the north and offshore where seismograph station coverage is poor. ln this paper we summarize the solutions and tabulate all data used in their
calculation.
Reconnaissance geological mapping in southwest Nass River map area, British Columbia
Authors: van der Heyden P , Woodsworth G J , Snyder L
D
Published: November 2010

The southwest Nass River (103 P/3, 103 P/4, and 103-O/1) map area is dominated by Upper (?)Jurassic marine sedimentary strata of the Bowser Lake Group and by Eocene granodiorite of the Coast Belt. A large stock of (?)Miocene miarolitic granite outcrops along
Observatory Inlet. Remnants of Pleistocene volcanic rocks and the Recent Aiyansh lava flow occur in the eastern part of the area.
Bowser Lake Group strata form a steep-sided, southwesterly tapering prong and were folded about northeast-trending axes. This deformation predates intrusion of the plutonic rocks and may be related to (?)Cretaceous deformation in the Skeena Fold Belt. Westernmost exposures of these strata may have
been metamorphosed and deformed in a major, down-to-the-northeast, extensional, ductile shear zone immediately prior to its digestion by Eocene plutons. Granitoid rocks are cut by steeply dipping, northeast-trending faults and fractures and may record late Tertiary extension.
Nechako NATMAP Project overview, central British Columbia, year five
Authors: Struik L C , MacIntyre D G
Published: November 2010

In this last year of the project, activities have been primarily laboratory and office research, compilation, and documentation of results, and presentations at various venues. Some fieldwork was done to constrain optional interpretations, and to initiate
post-project follow-up studies. A suite of bedrock maps has been produced covering the Fort Fraser, parts of Nechako River, the east half of the Manson River NTS sheets, and the Babine Porphyry Belt. In addition, surficial geology maps were produced for these same areas including Manson River, and
part of western Prince George. Computer GIS products and some maps will contain the geology base integrated with till, lake, lodgepole pine, and lithological chemical data sets. In addition magnetic, gravity, DEM, and RADARSAT maps are being integrated with lithological and structural maps. Research
into, and integration of, Quaternary geology, structure and tectonics, paleontology, tectonostratigraphic terrane characterization, metallogenesis, and isotopic chemical signatures continues.
Geology of the Oyama map sheet, Vernon map area, British Columbia
Authors: Glombick P , Erdmer P , Thompson R I , Daughtry K L
Published: November 2010

The Oyama (82 L/3) map area straddles the boundary between Paleozoic to Late Proterozoic high-grade rocks of the Shuswap metamorphic complex and medium- to low-grade Permian to Triassic rocks presently assigned to the allochthonous Quesnellia terrane. The
high-grade rocks are composed of a paragneiss succession intruded by foliated and massive plutons of various ages, and reached peak metamorphic conditions above the second sillimanite isograd. A north-striking, west-dipping zone of ductile shear is exposed in the high-grade rocks along the east side
of Kalamalka Lake. The low-grade rocks are less penetratively deformed, have locally been metamorphosed to garnet grade, and are intruded by Jurassic and Eocene plutons. Eocene sedimentary and volcanic rocks occur as erosional outliers resting conformably on basement rocks, and within small
fault-bounded basins preserved within present-day valleys. Steep, brittle normal faults have juxtaposed high- and low-grade rocks and are overlapped by Eocene volcanic breccia.
Nicola Horst, southern British Columbia: window into the pre-Triassic margin of North America?
Authors: Moore J M
Published: November 2010

The Nicola Horst, in the Intermontane Belt of British Columbia, is separated from surrounding volcaniclastic rocks of the Late Triassic Nicola Group by steep brittle Tertiary faults. It includes metavolcanic units correlative with the Nicola Group and quartzite
metaconglomerate and graphitic metapelite that are probably older, intruded by mafic and granitic rocks ranging in age from Palaeocene to latest Triassic. Supracrustal rocks and early metatonalite are strained, metamorphosed to amphibolite facies, and truncated by less-deformed plutonic units. The
horst provides a window into the middle crust and perhaps below the base of the Nicola Group. Siliciclastic metasedimentary rocks are similar to units exposed to the east, in Vernon map area, postulated to represent a stratigraphic link between the Triassic rocks of Quesnellia and the late
Proterozoic early Paleozoic margin of North America. If the proposed correlations are valid, North American basement extends at least as far west as the Nicola Horst.
Recent warming impacts in the Mackenzie Delta, Northwest Territories, and northern Yukon Territory coastal areas
Authors: Wolfe S A , Kotler E , Nixon F M
Published: November 2010

Ice wedges on northern Richards Island, Northwest Territories, and along the Yukon Territory coastlands, have responded to increased thaw depths. Observations made in 1999 are compared to those last made in these areas in 1975 and 1984, respectively. Climate data
indicate that air temperatures in these areas have been warmer than average since 1978 and that warming in 1998 was an extreme event. Increased thaw in response to this warming has caused a decrease in the number of secondary and tertiary ice wedges, and is attributed to thaw truncation. Depths to
the tops of ice wedges on Richards Island have increased, whereas depths have decreased on the Yukon Territory coastlands due to thaw consolidation. Thaw-tube observations indicate that 1998 thaw depths were the greatest since 1991 across the northern Mackenzie Delta region, with increases of as
much as 21 cm.
Preliminary report on surficial geology investigations of La Biche River map area, southeast Yukon Territory
Authors: Smith I R
Published: November 2010

As part of the Central Forelands NATMAP Project, field investigations of the surficial geology of the La Biche River map area (NTS 95 C), southeastern Yukon Territory, were initiated. The distribution of erratics and glacial geomorphology, notably extensive
bedrock fluting fields, indicates that the area was largely occupied by Montane ice advancing from the west-southwest. Granite erratics were found in glaciofluvial and till deposits within the south-central area. These indicate the presence of westward flowing Laurentide ice ~30 km beyond
previously proposed limits, suggesting a more extensive advance of Laurentide ice across the Mackenzie Mountains bounding the eastern study area. During deglaciation, retreating ice impounded the regional drainages, forming large, proglacial lakes.
Ice- and clay-rich glaciolacustrine sediments and extensive shale deposits have led to widespread mass movements at varied scales (local to tens of square kilometres). The surficial investigations includes mapping these features to provide a database for risk assessment.
Archean and Paleoproterozoic fault history of the Big Lake shear zone, MacQuoid-Gibson lakes area, Nunavut
Authors: Ryan J J , Hanmer S , Sandeman H A , Tella S
Published: November 2010

The Big lake shear zone in the MacQuoid Gibson lakes area comprises diverse mylonitic rocks with a complex tectonothermal history. The shear zone has an exposed strike length of 50 km, with abrupt termination to the west. Central and eastern segments of the shear
zone consist of dextral, amphibolite-facies, porphyroclastic mylonite and annealed straight gneiss. The western segment, however, is cored by variably retrogressed granulite-facies mafic and anorthositic ultramylonite, within amphibolite-facies wall rocks, and has a more complex kinematic history.
The granulite-facies rocks are spatially associated with the anorthosite sheets, which are interpreted here as the dominant heat source of the localized high-grade event. The ultramylonite units are crosscut by undeformed ca. 2.19 Ga MacQuoid dykes, constraining the high-grade, high-strain event to
be older. Regional aeromagnetic data illustrate that the western segment is truncated by two faults of (?)Proterozoic age.
Geology of the Henik, Montgomery, and Hurwitz groups, Sealhole and Fitzpatrick lakes area, Nunavut
Authors: Aspler L B , Höfer C , Harvey B J A
Published: November 2010

Bimodal mafic-felsic volcanic rocks, consistent with rift and back-arc tectonic settings, form lenses in the lower Henik Group (Neoarchean). Emplacement of granitic bodies within the Henik Group was syn- to post-tectonic. Montgomery Group (age uncertain)
conglomerate beds unconformably overlie Archean basement and are voluminous, suggesting fault-generated relief during sedimentation. Lower Hurwitz Group continental strata record Paleoproterozoic intracratonic basin expansion; locally preserved dolostone beds near the base of the predominantly
fluvial Maguse Member (Kinga Formation) reflect a short-lived marine incursion. Pebbly arkose units between mature arenite beds of the Maguse and Whiterock members signify slope failure from basement monadnocks. Unusual feldspar megacryst-bearing gabbro sills in the Hurwitz Group were likely fed by
hitherto unreported dykes which cut basement. Well foliated basement clasts in Montgomery and Hurwitz group conglomerate units imply deformation (likely Archean) before Paleoproterozoic dome-and-basin basement-cover infolding. Variably oriented folds and faults, including a duplex-like structure,
accommodated constrictions arising from Paleoproterozoic concentric infolding.
Integrated regional analysis of the Red Lake greenstone belt and its mineral deposits, western Superior Province, Ontario
Authors: Sanborn-Barrie M , Skulski T , Parker J , Dubé B
Published: November 2010

The Red Lake greenstone belt records a 300 Ma history of episodic volcanism, sedimentation, deformation, and mineralization. The Balmer assemblage, host to current and past-producing gold mines, consists of tholeiitic and komatiitic lava flows intercalated with
2.98-2.96 Ga felsic volcanic, clastic, and chemical sedimentary rocks. The Ball assemblage comprises crustally contaminated komatiite, tholeiitic basalt, 2.94-2.92 Ga calc-alkaline, felsic volcanic rocks, and stromatolitic carbonate. The Slate Bay sedimentary assemblage of wacke, conglomerate and
less than 2.91 Ga quartzose arenite records accumulated Balmer- and Ball-age material, prior to the 2.89 Ga intermediate pyroclastic volcanism and sedimentation of the Bruce Channel assemblage. The Confederation assemblage rests unconformably on the Balmer, and consists of basal conglomerate, 2.74
Ga FIII-type rhyolite and tholeiitic basalt with volcanogenic- massive-sulphide-style alteration-mineralization, and younger 2.73 Ga calc-alkaline pyroclastic rocks. Polyphase deformation involved pre-Confederation tilting and at least two episodes of post-Confederation deformation reflected by
folds and fabrics of low to moderate finite strain.
Dolostone units of the Beekmantown Group in the Montreal area, Quebec: diagenesis and constraints on timing of hydrocarbon activities
Authors: Chi G , Lavoie D , Salad Hersi O
Published: November 2010

The dolostone units of the Beekmantown Group in the Montreal area contain multiple generations of dolomite. Early replacement dolomite was followed by late replacement dolomite, pore-filling dolomite, pore-filling quartz, and pore-filling calcite. Homogenization
temperatures of aqueous fluid inclusions increased from late replacement dolomite (110-118°C) and early pore-filling dolomite (98-101°C) to late pore-filling dolomite (158-169°C), and then decreased during precipitation of quartz (101-142°C) and calcite (121-135°C). The
fluids show very high salinities (17-32 wt.% NaCl equivalent). Solid bitumen coats open pores, postdates late replacement and/or early pore-filling dolomite, and predates late pore-filling dolomite and quartz. Methane inclusions are entrapped in the quartz cement. It is suggested that the
dolostone units of the Beekmantown Group may have been charged with liquid hydrocarbons before maximum burial, which were then transformed to gaseous products by overheating with increasing burial. The dolostone units were porous and could have been reservoirs for gaseous hydrocarbons until some
time after the maximum burial, when much of the porosity was occluded by calcite cement.
Pre-Cairnside Formation carbonate-rich sandstone: evidence for a Cambrian carbonate platform in southwestern Quebec?
Authors: Salad Hersi O , Lavoie D
Published: November 2010

Logging of cores drilled from the Unimin quarry, near St.-Canut, southwestern Quebec, revealed bioclastic, dolomitic sandstone lithofacies below the upper Cambrian Cairnside Formation, upper Potsdam Group. This lithofacies is distinctly different from any
previously known lithology of the Covey Hill Formation (lower Potsdam Group). Preliminary local and regional lithostratigraphic correlations suggest that the pre-Cairnside Formation, mixed siliciclastic-carbonate unit extends eastward as far as the St. Croix village, about 50 km southeast of the
Québec City. Based on these correlations, two scenarios explaining possible regional depositional episodes and associated depositional systems tracts are also discussed.
New insights into glaciation and sea-level fluctuation on northern Grand Bank, offshore Newfoundland
Authors: King E L , Sonnichsen G V
Published: November 2010

High-resolution geophysical surveys of northern Grand Bank document sea-level fluctuations and an extensive glaciation. Multiple erosion-bounded progradational and aggradational sediment packages include two clinoform bodies deposited during the late Cenozoic as
bank spillover rather than from glacial meltwater. A change from aggradation to shelf-break progradation with oversteepening and sediment failure apparently reflects increased sediment flux in the Pliocene-Pleistocene. A pervasive near-surface glaciogenic blanket interpreted as mainly till and
related recessional moraines are evident to 400 m water depth. This represents the only clear evidence for glaciation extending to the shelf break. Abrupt truncation of the moraines in the southwest may indicate a pre-Late Wisconsinan transgression that eroded the till above about 160 m water depth
leaving only remnants shallower than this. A Late Wisconsinan glaciation is not ruled out. Localized occurrences of hardground, likely relating to subaerial exposure, may be widespread above 160 m water depth.
Tectonostratigraphie de la région de Rivière-du-Loup, Zone de Humber externe, Québec
Authors: Gagnon J , Lavoie D , Tremblay A
Published: November 2010

As part of the Appalachian Foreland and St. Lawrence Platform NATMAP Project, fieldwork was carried out in the Rivière-du-Loup area (lower St. Lawrence River) in order to decipher the stratigraphy and structure of the Humber Zone. From bottom to top, the
stratigraphic sequence in this area consists of the following: Saint-Roch Group, Trois-Pistoles Group, Rivière Ouelle Formation, and Tourelle Formation. The Taconic Orogeny is responsible for most of the observed deformation. Numerous thrust faults dipping southeast 25-35° are found in all
units. Abundant northerly to westerly oriented strike-slip faults as well as northeast-oriented normal faults are also present.
Mesozoic geology of the Takysie Lake and Marilla map areas, central British Columbia
Authors: Anderson R G , Snyder L D , Grainger N C , Resnick J , Barnes E M , Pint C D
Published: November 2010

Takysie Lake (NTS 93 F/13) and Marilla (NTS 93 F/12) map areas are underlain by Mesozoic to Tertiary stratified and intrusive rocks segmented by Jura-Cretaceous and Tertiary faults. Lower to Middle Jurassic Hazelton Group includes heterolithic coarse-grained
volcaniclastic rock; lesser, finer grained greywacke and mudstone; and clinopyroxene-phyric, coarse-grained laharic volcanic conglomerate characteristic of the Naglico formation. Jura-Cretaceous siliciclastic rocks, rich in chert and felsic volcanic fragments, are correlated with Bowser Lake or
Skeena groups. Hornblende-phyric volcaniclastic rocks of the Cretaceous Kasalka Group are rare.(?)Jurassic and (?)Late Cretaceous, porphyritic and phaneritic, mafic, intermediate and felsic intrusions locally crosscut a pre-Eocene reverse fault, and are cut by northwest- and northeast-trending
Eocene block faults.
Aeromagnetic Survey Program of the Geological Survey of Canada, 1998-2000
Authors: Dumont R , Coyle M , Oneschuk D , Kiss F , Tod J
Published: November 2010

In 1998-2000, two high-resolution, regional aeromagnetic surveys totalling 148 533 line kilometres were flown in the Mackenzie Corridor, Northwest Territories. Also, in 1999, a high-resolution, regional aeromagnetic survey totalling 81 765 line kilometres was
flown over Lake Ontario and northern New York State. Phase I of the Mackenzie Corridor survey and the Lake Ontario and northern New York State survey were both supported by a cost-sharing agreement with industry partners. A detailed, multiparameter electromagnetic/magnetic/gamma-ray spectrometric
helicopter-borne survey totalling 11 400 line kilometres was flown in New Brunswick; this survey was funded by the Province of New Brunswick.
World distribution of nickel deposits
Authors: Eckstrand O R , Good D J
Published: November 2010

The spatial distribution and most significant geological attributes of the world's major nickel and nickel-copper ore deposits are depicted in this data set. The majority of these deposits are associated with mafic and/or ultramafic igneous rocks in the form of
volcanics or intrusions. In some settings they originated as components of these igneous rocks, and were further concentrated in the products of deep chemical weathering (laterite), or crumbling and redistribution in the drainage system or along the sea shore as placers.
Airborne gamma-ray spectrometry over the Endako porphyry molybdenum district in central British Columbia
Authors: Porter J K , Lowe C
Published: November 2010

In 1995 airborne gamma-ray spectrometric data were acquired over the Endako porphyry molybdenum district in central British Columbia. Here we analyze these data together with surficial and lithogeochemical data to assess their utility as an aid to geological
mapping and mineral exploration. Our results show that individual surficial units (e.g. till, glaciolacustrine, alluvium, etc.) cannot be distinguished in airborne data or geochemical analyses of surficial deposits. We observe small differences in mean radioelement concentrations between mapped
bedrock units, even in areas of thick overburden; however, as all such differences are statistically insignificant, individual bedrock units cannot be uniquely identified by their radioelement response alone. We conclude that airborne spectrometry has limited mapping application where variations in
bedrock compositions are subtle. Unlike other porphyry molybdenum occurrences in Canada, those in our study area are characterized by modest enrichments in both K and eTh relative to the host rock and significant eTh/K depletions are not observed.
Preliminary results of electrical characteristics of mineralized and nonmineralized rocks from the Yellowknife area, Northwest Territories
Authors: Katsube T J , Mwenifumbo J , Kerswill J , Connell S , Scromeda N
Published: November 2010

Electrical resistivity characteristics of a suite of ten rock samples from the Giant and Con mines (Northwest Territories) have been investigated to provide information for development of exploration strategies and to aid interpretation of down-hole, ground, and
airborne electromagnetic (EM) surveys. Samples include material from 1) gold-bearing quartz veins; from altered shear zones represented by 2) sericite schist immediately adjacent, and 3) chlorite schist further removed from these veins; and from 4) basalt that hosts the shears and veins.

Preliminary results indicate that nonmineralized rocks display electrical resistivity (rr) values of 2000-24 000 ohm·m with weak electrical anisotropy (4:1-7:1). Some sections of the gold-bearing vein display low rr values (30-100 ohm·m), but without evidence of continuity. Mineralized
sericite schist displays intermediate rr values (600-1000 ohm·m) and with continuity along foliation with relatively strong anisotropy (10:1), implying that it might form a good exploration target; however, inappropriate survey-line orientation could cause EM surveys to miss the target, due to
the electrical anisotropy.
Global Terrestrial Network for Permafrost (GTNet-P): permafrost monitoring contributing to global climate observations
Authors: Burgess M M , Smith S L , Brown J , Romanovsky V , Hinkel K
Published: November 2010

Active layer and permafrost thermal state have been identified as key cryospheric variables for monitoring through the World Meteorological Organization's Global Climate Observing System. An international network, the Global Terrestrial Network for Permafrost
(GTNet-P), has been established under the Global Climate Observing System and is being developed by the International Permafrost Association. The active layer component, the Circumpolar Active Layer Monitoring (CALM) program, is already in place. Global Terrestrial Network for Permafrost
organizational efforts are thus focused on the development of the permafrost temperature monitoring program, where Canada contributes actively through the Geological Survey of Canada's membership on the International Permafrost Association organization and implementation committee. Although several
regional permafrost borehole temperature networks exist, a globally comprehensive network for ground temperature measurements is required to provide long-term field observations essential for the detection of the climate change signal, for the assessment of its impact on permafrost, and for
indications of spatial variability across the permafrost regions.
The impact of climate change on rivers and river processes in Canada
Authors: Ashmore P , Church M
Published: November 2010

Rivers are sensitive to natural climate change as well as to human impacts such as flow modification and land-use change. Climate change could cause changes to precipitation amounts, the intensity of cyclonic storms, the proportion of precipitation falling as
rain, glacier mass balance, and the extent of permafrost; all of which affect the hydrology and morphology of river systems. Changes to the frequency and magnitude of flood flows present the greatest threat. Historically, wetter periods are associated with significantly higher flood frequency and
magnitude. These effects are reduced in drainage basins with large lakes or glacier storage. Alluvial rivers with fine-grained sediments are most sensitive, but all rivers will respond, except those flowing through resistant bedrock. The consequences of changes in flow include changes in channel
dimensions, gradient, channel pattern, sedimentation, bank erosion rates, and channel migration rates. The most sensitive and vulnerable regions are in southern Canada, particularly those regions at risk of substantial increases in rainfall intensity and duration. In northern rivers, thawing of
permafrost and changes to river-ice conditions are important concerns. The type and magnitude of effects will be different between regions, as well as between small and large river basins. Time scales of change will range from years to centuries. These changes will affect the use that we make of
rivers and their floodplains, and may require mitigative measures. Radical change is also possible. Climatic impacts will be ubiquitous and will be in addition to existing and future direct human impact on streamflow and rivers.
New geological mapping in Yukon-Tanana terrane near Thistle Creek, Stewart River map area, Yukon Territory
Authors: Ryan J J , Gordey S P
Published: November 2010

The Thistle Creek map area (NTS 115-O/3), in the Stewart River area, Yukon Territory, is underlain by poly- deformed and metamorphosed Paleozoic rocks of the Yukon-Tanana terrane, and younger plutonic rocks. Two fault-bounded tectonostratigraphic associations
dominate the map: 1) polyphase grey orthogneiss in garnet- amphibolite schist-gneiss, interpreted herein as a metavolcano-plutonic complex; 2) interstratified garnet- amphibolite schist-gneiss and metasedimentary schist and paragneiss derived from psammite, semipelite and quartz-arenite,
collectively interpreted as a metavolcano-sedimentary succession. Grey and white banded quartzite beds are generally in fault contact with the gneiss and schist units, and their stratigraphic relationships are equivo- cal. Recognition of this area as an extensive metavolcanic terrane has significant
implications for the economic potential of this area. Primary stratigraphy is obscured by an intense transposition deformation, and later, open folds and faults. Regional correlations of plutonic suites indicate that the transposition event was post-Carboniferous and
pre-Jurassic.
Lithology, tectonostratigraphy, ans paleogeography of the Vavenby area, Eagle Bay Assemblage, south-central British Columbia, a possible constraint for the timing of the rifting of Laurentia
Authors: Hughes N D , Paradis S , Sears J
W , Pope M
Published: November 2010

New 1:20 000 scale mapping within the pericratonic rocks of the Eagle Bay Assemblage near Vavenby, south- central British Columbia, has revealed a stratigraphic transition from continental slope siliciclastic rocks of Latest Neoproterozoic or Early Cambrian age
to a sequence dominated by thick successions of Early Cambrian mafic vol- canic and volcaniclastic rocks with an associated archaeocyathid-bearing carbonate platform. These rocks are overturned and structurally emplaced above the Devonian and Mississippian portion of the Eagle Bay Assemblage.
Overall, this section is interpreted as recording the transition from deeper water, turbiditic and pelagicsedimentation to a period of tectonism and creation of a shallow-water to subaerial, mafic volcanic edifice. These Latest (?)Neoproterozoic and Early Cambrian pericratonic rocks within the Eagle
Bay Assemblage record a period of Early Cambrian tectonism and mafic volcanism, supporting recent models of continental separation in this region at that time.
Preliminary petrograhy and chemistry of the Mount Cayley volcanic field, British Columbia
Authors: Kelman M C , Russell J K , Hickson C J
Published: November 2010

Sixty-two samples from five volcanic centres (Ember Ridge, Mount Fee, Slag Hill, Ring Mountain, and Little Ring Mountain) were collected as part of a preliminary petrological investigation of the Mount Cayley volcanic field. The sampled deposits are flows and
domes, and many show features indicative of ice contact during eruption (e.g. abundant glass, fine-scale jointing). Mineralogically, the samples range from andesite to rhyodacite, and chemi- cally, the rocks span a range from andesite to dacite. Glassy samples are abundant, with glass contents as
high as 70%.
Electrical mechanism of mineralized rocks from Giant and Con mine areas, Northwest Territories
Authors: Connell S , Katsube T J , Hunt P , Kerswill J
Published: November 2010

Electrical conductivity mechanisms have been determined for five mineralized and unmineralized rock samples (gold-bearing ore, two chlorite schist, and two basalt samples) from the Yellowknife mining district, by analyzing the relationship between rock texture
and three-dimensional electrical characteristics. The purpose was to obtain information to help develop efficient exploration strategies in the Yellowknife Mining District. Results indicate that continuous quartz and calcite layers parallel to foliation act as electrical insulators in schist and
basalt, causing very high electrical resistivity values perpendicular to foliation (13 000-14 000 W .m). Fine-grained mineral layers accompanied by reasonable amounts of pore space cause moderate pore-fluid con-nectivity and lower resistivity values (2000-4500W .m) parallel to foliation. Although
layers of relatively high con- centrated sulphide existed in the gold-bearing ore sample, a lack of good grain-to-grain contacts resulted in low to moderately low resistivity values (10-1000W .m) parallel to foliation (i.e. one to two orders of magnitude lower).
The ca. 2680 Ma Raquette Lake Formation and correlative units across the Slave Province, Northwest Territories: evidence for a craton-scale overlap sequence
Authors: Bleeker W
Published: November 2010

The geology and lithostratigraphy of the Raquette Lake Formation on the southeastern flank of the Sleepy Dragon Complex, Yellowknife Domain, are described. Twenty-seven sections across apparent stratigraphy have been measured and laterally correlated, and form
the basis for a somewhat broadened definition of the Raquette Lake Formation and the correlative Detour Lake Formation. Both formations are included in a new group, the Ross Lake Group, the introduction of which better reflects currently known lithostratigraphic and chronostratigraphic relation-
ships in the area. The Raquette Lake Formation unconformably overlies the Cameron River Basalt formation and the partly unroofed, synvolcanic Ross Lake Granodiorite. The sub-Raquette Lake unconformity is correlated with the third of four temporally distinct unconformities in the Point Lake area, 280
km to the north. Furthermore, similar lithostratigraphic units are described from west to east across the Slave Province suggesting existence of a ca. 2690-2680 Ma marker horizon that overlaps a putative basement suture.
Diabase dyke swarms in the Lac de Gras area, Northwest Territories, and their significance to kimberlite exploration: initial results
Authors: Wilkinson L , Kjarsgaard B A , LeCheminant A
N , Harris J
Published: November 2010

In the Lac de Gras area, geochemical composition and field relationships characterize five Proterozoic diabase dyke swarms and provide data for the development of a tectonic model of dyke emplacement that has implications for kimberlite exploration. Patterns in
dyke characteristics (age, orientation, geochemical composition, paleomagnetism) divide the dykes into populations, whose spatial relationship to known kimberlite pipes is tested using GIS and Bayesian techniques. Three Paleoproterozoic dyke swarms (Malley, MacKay, Lac de Gras), both individually
and combined as a single population, have a moderate to strong spatial association with known kimberlite bodies. No apparent spatial asso- ciation exists between younger dyke swarms (Mackenzie and 305° ) and known kimberlite bodies.The oldest dyke sets are subparallel to known faults and/or
joint sets. The evaluation of the role of early structures in controlling the orientation of Paleoproterozoic dykes requires a better understanding of the age of these faults.
Influence of till thickness and texture on till geochemistry in the Lac de Gras area, Northwest Territories, with applications for regional kimberlite exploration
Authors: Wilkinson L , Harris J , Kjarsgaard B A , McClenaghan B , Kerr D
Published: November 2010

Although the Lac de Gras area hosts numerous kimberlite pipes, continued exploration success depends on the development of a kimberlite exploration model for this region. This paper presents preliminary analyses of the use of till geochemistry for kimberlite
exploration. Elements whose concentrations are higher in kimberlite than in the bedrock of this region were identified as Ba, Ce, Cr, La, Mg, Nb, and Ni. For these elements, the geochemical composition of regional clay and clay+silt size frac- tions of till was compared to that of the clay+silt+sand
size fraction from a detailed survey to determine the compositional variation of the till in the various till size fractions. High concentrations of Ba, Cr, Mg, and Ni in thethick till are apparently due to differences in the derivation of entrained debris. To identify a kimberlite geochemical
signature in the till, different anomaly thresholds must be selected for discrete till sample populations based on till thickness.
Preliminary results of relative ice-movement chronology of the Laughland Lake map area, Nunavut
Authors: Little E
Published: November 2010

Preliminary surficial materials mapping at a 1:100 000 scale within the Laughland Lake (NTS 56 K) map area has 1) refined the previously mapped distribution and abundance of glacial sediments, and 2) elucidated at least four different episodes of ice movement.
The oldest of the ice-movement sequences appears to have originated from an ice divide located northeast of the study area; this particular episode most likely predates the last glacial maxi-mum, possibly related to early Wisconsinan (d 18 O stage 4) or penultimate glacial (d 18 O stage 6) ice
dynamics. The younger ice-movement indicators are related to last glacial maximum and post-last glacial maximum events. Ice-movement indicators associated with the last glacial maximum sensu stricto generally scatter about due north (~355°-005°), whereas those related to post-last
glacial maximum events suggest west-northwest followed by north-northwest ice movements. These data also have implications pertaining to the evolution of last glacial maxi- mum and post-last glacial maximum ice divides.
Supracrustal faults of the St. Lawrence rift system between Cap-Tourmente and Baie-Saint-Paul, Quebec
Authors: Tremblay A , Lemieux Y
Published: November 2010

The St. Lawrence rift system is made up of Late Proterozoic-Early Paleozoic supracrustal faults attributed to the opening of the Iapetus Ocean. The normal faults commonly occur at the contact between metamorphic rocks of the Grenvillian basement to the northwest
and Cambrian-Ordovician strata of the St. Lawrence Lowlands to the south- east. Coastal sections of the St. Lawrence River that expose the Cap-Tourmente Fault and the St. Lawrence Fault have been studied between Cap-Tourmente and Baie-Saint-Paul. Fault rocks that mark these two normal faults consist
of fault breccia, cataclasite, fault gouge, and pseudotachylyte. Field relations suggest that the various types of fault rocks are genetically related and associated to the same tectonic event. The comparison with faults charac- terizing the Charlevoix meteoritic structure indicates that brittle
fault rocks are not limited to impact cratering, and that reactivation of the St. Lawrence rift system is a postimpact, probably Mesozoic phenomenon.