bluuebunny/crossref_metadata_2025 huggingface dataset:
A glacial origin of Sable Island: ice and sea-level fluctuations from seismic stratigraphy on Sable Island Bank, Scotian Shelf, offshore Nova Scotia
Authors: King E L
Published: November 2010

A database of interpreted geological cross-sections assembled from analogue high-resolution seismic-reflection profiles from Sable Island Bank has been compiled. A preliminary seismostratigraphy has enhanced understand- ing of the mid-late Pleistocene section.
Numerous units and their bounding unconformities indicate a complex his- tory of glaciogenic and sand-sheet deposition and associated sea-level fluctuations. A near-shelf-break ice-maximum position is interpreted for the Late Wisconsinan and inferred for earlier stades and/or glaciations. A late
readvance sometime between 16 ka and 14 ka deposited a thick sand body over the transgressed bank, form- ing ancestral Sable Island. Modification and transport of sands accompanied a subsequent transgression. The database will provide the basis for compilation of a lithological and geotechnical
zonation and a suite of maps depicting unit thickness and distribution, unconformities, and subsurface features, including geohazards, as well as large-scale (>1.5 m high) surficial bedforms.
Spectral induced polarization measurements of sericite schist and ore samples from the Yellowknife mining district, Northwest Territories
Authors: Scromeda-Perez N , Katsube T J
Published: November 2010

Spectral induced polarization measurements have been performed over a frequency range of 1 10 6 Hz on a suite of four mineralized and nonmineralized rock samples from the Giant mine and Con mine areas of the Yellowknife mining district, Northwest Territories. The
purpose was to provide data for use in determining the electrochemical characteristics of the sulphides in these rocks. Results indicate that the amplitude of complex resistivity (r + ) and imaginary resistivity (r² ) in thea -direction (per-pendicular to foliation) consistently display larger
values than those of theb- org -directions (parallel to foliation). The per cent frequency effect displays similar trends in the two directions (a - andb -org -directions) with values in the range of 10 30% at the lower frequencies (< 1000 Hz). This implies that the induced
polarization effect of the sulphide minerals are being reflected in the data for all of these samples.
Conductivity of western Superior Province upper mantle in northwestern Ontario
Authors: Craven J A , Kurtz R D , Boerner D E , Skulski T , Spratt J , Ferguson I J , Wu X , Bailey R C
Published: November 2010

Magnetotelluric (MT) measurements at the Earth's surface are sensitive to charge carriers that may be introduced into an insulating crystalline lithosphere due to active or ancient tectonomagmatic processes operating within the crust and upper mantle. During 1998
and 2000, MT data were acquired within the western Superior LITHOPROBE and NATMAP study area to image conductive lithospheric structures that may be associated with Archean accretionary tectonics. The MT responses observed on either side of the 3 Ga North Caribou terrane are aligned subparallel to
ca. 2.7 Ga transpressional zones. An initial 3-D model that reproduces the observed MT data within, and south of the North Caribou terrane locates the conductive structures within the uppermost mantle. Wesuggest that this upper mantle conductivity aligned subparallel to major zones of transpression,
is the residue of partial melting related to syn- to late-Kenoran magmatism and deformation.
Mineralogical investigations of Canadian till and lake- and stream-sediment reference materials: part 2. A comparison of four methods to determine semiquantitative mineralogy
Authors: Percival J B , Knight R D , Hunt P
Published: November 2010

Four methods to determine modal mineralogy were compared for three reference materials, STSD-1, LKSD-4, and TILL-1. These methods include ModAn, a normative calculation based on bulk chemical and mineralogical composition, X-ray diffraction analysis, and two
scanning electron microscope techniques: feature image analysis and X-ray mapping. Results from each of the methods are reasonable and comparable; however, the choice of method must take into consideration their limitations such as need of bulk composition and mineralogy data to run ModAn; a
detection limit of 2 3% of a mineral for XRD; automated X-ray beam positioning in feature image analysis; and extended processing time for X-ray mapping.
Remote sensing as a geological mapping tool in the Arctic: preliminary results for Baffin Island, Nunavut
Authors: Harris J R , Eddy B , Rencz A , de
Kemp E , Budkewitsch P , Peshko M
Published: November 2010

A study involving the application of remote sensing technology for geological mapping in arctic environments has been initiated in southern Baffin Island. Various remotely sensed imagery, characterized by different wavelengths and spatial and spectral
resolutions, have been or is presently being acquired. This area has been chosen as it represents a typical arctic geological and biophysical environment. It has a variety of lithologies ranging from gneissic and/or granitoid basement rocks to rift-related volcanic and sedimentary rocks to younger
overlying Paleozoic sediments, and has been mapped on a regional scale (1:100 000) by the Geological Survey of Canada.Particularly relevant for this project is the recent advancement of hyperspectral remote-sensing technology. Eleven lines of high-resolution hyperspectral data have been acquired
using the Noranda Probe sensor over the study area. Preliminary results indicate that the optical sensors (Landsat TMand Probe) provide useful information with respect to compositional layering, structural patterns, and vegetation.
Reconnaissance-scale till survey in the New Liskeard-Temagami region, Ontario: kimberlite indicator minerals and geochemistry
Authors: McClenaghan M B , Kjarsgaard I M , Kjarsgaard B A
Published: November 2010

This report describes results of a reconnaissance-scale kimberlite indicator mineral (KIM) till survey in the area south of the known Lake Timiskaming kimberlite field, between New Liskeard and Marten River. The survey provides information on the regional
background content of KIM in till, the nature of KIM signatures in till just down-ice of known kimberlites, and, the distribution of KIM anomalies that warrant further investigation.
Three phases of flow are associated with erosion, transportation and deposition of till in the region. The main carriers of glacial debris, however, were the two oldest ice flows to the southwest and south. A large dispersal train of Paleozoic limestone derived from upper Lake Timiskaming trends
south-southwest across the area, but has been truncated in its proximal part (Latchford area) by the last southeast ice flow indicating that in this area, southeast ice flow was a major carrier of debris. These situations have to be taken into consideration in the interpretation of dispersal trains
formed by the three major ice flows.
Mg-ilmenite is the most abundant and widespread KIM in the till in the study area. Chromite occurs in approximately the same till samples that contain Mgilmenite, but is generally present in lower abundances. Pyrope in till is approximately half as abundant as Mg-ilmenite. Cr-diopside is similar in
abundance to pyrope and is present in almost every sample. Elevated Crdiopside abundances that are not accompanied by other KIMs likely are not from kimberlite. Anomalous concentrations of kimberlite indicator minerals in till occur: on the Red Squirrel Road; near Temagami; along Highway 11 in the
central part of the study area; on the east side of Lake Timiskaming; and on the Rabbit Lake forest access road. Some of these anomalies coincide with anomalies identified by the OGS in their recent stream sediment survey (Allan, 2001). Additional till sampling combined with geophysics should be
conducted to determine the extent of the KIM anomalies and trace them to their bedrock source, with a sample spacing that is much smaller ( <500 m) than used in this reconnaissance survey.
Geoscience data compilation for southeastern Manitoba
Authors: Panagapko D A , Chackowsky L , Lenton P , Bailes A H , Corkery T
C , Poulsen K H , Brommecker R , Weber W , Ames D
E , Scoates R F J , Garson D
F , Theyer P , Percival J , Thorleifson L H , Matile G L D , Grant N M , Burt A K , Mann J
D
Published: November 2010

This Open File was released with a mistake in the initials of one of its authors. Please note that the name "T.C. Corkery" should have been spelled "M.T. Corkery".
Fossils of the Middle Cambrian Burgess Shale, British Columbia, Canada: distribution and biostratinomic change through time
Authors: Kottachchi N
Published: November 2010

Over 30 years of commercial hydrocarbon drilling exploration on the Canadian Atlantic Margin has provided the Geological Survey of Canada (GSC) with a priceless collection of micropaleontological samples and data from the thick Jurassic-Quaternary sedimentary
wedge underlying our continental margin. This material has allowed a small cadre of GSC scientists and technicians to document and correlate, using standardized methods of preparation and study, the micropaleontological assemblages found in the offshore wells. There has also developed a better
understanding of the evolutionary history of individual microfossil taxa and whole benthic assemblages, as well as regional correlations with other microfossil groups. Such studies have helped unravel the tectonic and sedimentary history of the economically important hydrocarbon basins in the
region. The state of micropaleontological knowledge of Canadian Atlantic Margin wells, including lists of wells sampled and studied is described, and a comprehensive listing of GSC produced literature on the subject is provided.
Bedrock geology of Yukon-Tanana terrane in southern Stewart River map area, Yukon Territory
Authors: Ryan J J , Gordey S P
Published: November 2010

Polydeformed and metamorphosed Paleozoic rocks of the Yukon-Tanana terrane underlie a large part of the Stewart River area, Yukon Territory. Quartz-rich metaclastic rocks (quartzite, quartz-mica schist, psammite) are regionally widespread, and are locally
interstratified with, as well structurally interdigitated with, metavolcanic rock (mafic and intermediate garnet-amphibolite). Mafic to felsic ortho-gneiss
is almost exclusively associated with the amphibolite, and rarely with metasiliciclastic rock. Complexes of mafic-ultramafic rock and associated orthogneiss are exposed at structurally high levels, and are thought to be part of an erosionally dismembered, originally continuous tectonic sheet,
emplaced on top of the metasiliciclastic rock. Emplacement occurred prior to regional transposition deformation and metamor-phism. Post-tectonic Early Jurassic and (?)mid-Cretaceous plutons crosscut the older fabrics. Sporadically
preserved, fault-disrupted felsic to mafic volcanic rocks of the late Cretaceous Carmacks Group unconformably overlie all older units. Local felsic porphyritic intrusions (? mostly dykes) are probably Eocene.
Sedimentology of Triassic siliciclastic strata, Mount Martin and Mount Merrill map areas, Yukon Territory
Authors: MacNaughton R B
Published: November 2010

In the Mount Martin and Mount Merrill map areas, Yukon Territory, 300 to 400 m of interbedded shale, siltstone, and sandstone are preserved between the top of the Permian Fantasque Formation and the base of Cretaceous strata (Chinkeh and Garbutt formations).
Based upon two detailed strati-graphic sections, preliminary sedimentological and stratigraphic study of this succession has been undertaken. Five facies associations are recognized, and are interpreted to record deposition on a wave-dominated siliciclastic shelf in environments ranging from distal
shelf to upper shoreface. Upward- coarsening packages (10-40 m thick) are common. The succession can be roughly subdivided into four units. In ascending order these are a basal, recessive (shale-dominated?) unit, a sandstone-rich unit, a shale-rich unit, and an upper unit containing sandstone and
shale in subequal proportions. Regional comparison of stratigraphic position, lithology, and trace-fossil assemblages suggests a tentative correlation with the Lower to Middle Triassic Toad Formation.
Overview of the Atlin Intergrated Geoscience Project, northwestern British Columbia
Authors: Lowe C , Mihalynuk M G
Published: November 2010

The Atlin Integrated Geoscience Project is a three-year initiative designed to advance our understanding of the geological evolution and mineral-resource potential of the northern Cache Creek Terrane, principally through the application of geophysical and
geological mapping surveys within the Atlin map area. The project was launched in 2000, with the collection of aeromagnetic data funded by the federal government's Targeted Geoscience Initiative. During 2001, matching funding by the British Columbia Geo-logical Survey Branch permitted systematic
bedrock mapping at a scale of 1:50 000 in the southern project area, and follow-up ground-based, magnetic and reconnaissance geological surveys of postaccretionary plutonic bodies. This work was conducted in partnership with geoscientists from Canadian and European uni-versities. The geological
mapping components were enhanced by geochemical, isotopic, and geo- and biogeochronological data. Four thesis projects will evaluate sequence stratigraphy, volcanic environments and petrogenesis, origin of ultramafic bodies, and tectonic evolution of serpentinite mélange
belts.
Stratal relationships of the Upper Triassic Baldonnel Formation, Williston Lake, northeastern British Columbia
Authors: Zonneveld J -P , Orchard M J
Published: November 2010

The Upper Triassic (Upper Carnian to lowermost Norian, from conodonts) Baldonnel Forma-tion outcrops extensively along the shores of Williston Lake, northeastern British Columbia. This mixed siliciclastic-carbonate unit consists primarily of calcareous to
dolomitic siltstone, sandstone, and bioclastic grainstone beds. It thickens westward (basinward), as marginal marine and continental strata of the underly-ing Charlie Lake Formation grade laterally and vertically into shallow marine strata typical of the Baldonnel Formation. The basal contact of the
Baldonnel with the Charlie Lake Formation is characterized by an erosional unconformity at Brown Hill, but is conformable both landward (east) and basinward (west) of this locality. A dark, organic-rich, calcareous siltstone unit (Ducette Member) occurs within the medial Baldonnel Formation in
western localities, but thins and pinches out eastward. The upper contact with the Pardonet Formation is conformable in the east, but characterized by an erosional unconformity in the west (basinward).
Plutonic rocks of the eastern Bella Coola map area, southwest British Columbia
Authors: Hrudey M G , Struik L C , Diakow L J , Mahoney J B , Woodsworth G J , Sparks H A , Kaiser E A , Gleeson T P
Published: November 2010

The abundant plutonic rocks of the eastern Bella Coola map area are mostly of intermediate composition and are interpreted as Jurassic to Eocene. They are subdivided into five intrusive suites, one intrusive complex, and several undifferentiated plutons. The
Salloomt suite ((?)Jurassic) is dominated by medium-grained, hornblende-rich diorite. The Kalone suite of biotite-hornblende tonalite is involved in ductile deformation within shear zones adjacent to Jump Across Creek. The Talcheazoone suite consists of uniformly foliated quartz diorite. The Firvale
suite comprises altered Early Cretaceous biotite granodiorite. The Four Mile suite comprises pristine biotite-muscovite granite; these plutons truncate a regional pattern of the northwest-trending folds and shear zones. The Crag Creek intrusive complex is diorite and gabbro cut by numerous locally
sheeted dykes of granodiorite, rhyolite, basalt, and andesite. Some lens-like sills between screens of country rock may have formed along pre-existing, subvertical structures.
New geological and paleontological data from the Harper Ranch Group, Kamloops, British Columbia
Authors: Beatty T W
Published: November 2010

The Harper Ranch Group comprises an Upper Paleozoic succession characterized by lime-stone and volcaniclastic, and siliciclastic rocks that underlie the Quesnel Terrane in the Canadian Cordillera. The relatively unmetamorphosed portion of the Harper Ranch Group
outcrops immediately north and north-east of the city of Kamloops, British Columbia and is overlain by Triassic Nicola group to the north and west, and Jurassic (?) Rossland Group to the east. Recent field studies have produced new data which make it possible to divide the group into recognizable
units on the basis of paleontology and apparent bounding surfaces. Additions to the body of paleontological data include: Early Mississippian (Tournaisian) cono-donts, furnishing a maximum age of the Mississippian volcaniclastic unit; Late Mississippian (Serpukhovian) goniatites providing the
potential for intercalibrated conodont-goniatite biostratigraphy; and Early Jurassic (Sinemurian) ammonites dating the base of the volcanic and volcaniclastic succession unconformably overlying the Harper Ranch Group to the east.
Extension orientale des roches volcaniques du Groupe de Wakeham et intrusion litée troctolitique de Musquaro, Province de Grenville, Basse-Côte-Nord, Québec
Authors: Corriveau L , Brouillette P , Scherrer G , Bonnet A -L
Published: November 2010

A geological transect centered on La Romaine village in the eastern Grenville Province reveals a significant eastward extension of the Wakeham Group. A lithological assemblage of lapillistone, amphibolite, marble, and aluminous gneiss is locally mineralized and
bears similarities with the 1.5 Ga supracrustal units newly recognized northwest of Musquaro Lake. These rocks are surrounded by granitic gneiss with recrystallized anorthosite enclaves. A practically undeformed 1 kmthick layered intrusion contains subvertical layers of peridotite, troctolite, and
gabbro, with local Cu mineralization as well as various intrusive breccias. In the study area, two units record polyphase deformation with spectacular interference fold patterns: the eastern margin of the layered intrusion and a tonalitic gneiss of regional extent. Along with the anorthosite
enclaves in the granitic gneiss, these units could be the expression of mafic magmatism and orogenesis of Labradorian age such as those found to the east in the Pinware terrane of Labrador.
Petrochemistry of Lake George granodiorite stock and related gold mineralization, York County, New Brunswick
Authors: Yang X , Lentz D R , Chi G
Published: November 2010

The plagioclase-hornblende-biotite porphyritic granodiorite stock (Au = 32 ppb average) at the Lake George Sb-Au-W-Mo deposit, New Brunswick was sampled (10 samples) from drill core and ana-lyzed. It is metaluminous to weakly peraluminous (A/CNK = 0.99-1.13),
calc-alkaline, Na 2 O>K 2 O, and has (La/Yb)N from 7.34 to 11.14 with a small negative Eu anomaly, as well as obvious negative Nb, Ti, Sr, and Ba anomalies. The Early Devonian ages and volcanic arc affinities (evolved I-type) favour a relation-ship with the Pokiok Batholith. Gold-bearing
quartz-vein mineralization within the stock and in the proximal metamorphic aureoles highlights its metallogenic association with the intrusion. Silicification, sericitization, and chloritization of the stock associated with quartz-vein mineralization are enriched in Au, As, S, W, Mo, Rb, K, and B.
These mineralizing fluids may be derived from the same granodioritic magma crystallizing at depth, although later than the W-Mo mineralization. The gold may be associated with an antimony mineralization episode.
A mineral deposit data base structure and a data base of VMS and Sedex deposits
Authors: Jenkins C L , Lydon J W
Published: November 2010

This database, VMSSEDEX in MS-Access[TM]-2.0 format, was created specifically for the compilation of geological, geochemical and economic data of volcanogenic massive sulphide (VMS) and sedimentary exhalative (Sedex) mineral deposits. The structure of the data
base is versatile, and is easily adaptable to other deposit types. It consists of three tiers: DISTRICT SCALE: regional information which is applicable to all deposits in the district (e.g. geographical information; regional stratigraphy; geological province) DEPOSIT SCALE: information on a single
geological deposit (e.g. grade and tonnage, geochemical and geophysical signatures; alteration; deposit scale zonation; local stratigraphy). LENS SCALE: information on geologically distinct parts of the deposit such as individual massive sulphide lenses and stockwork zones. The geological and
geochemical data include those parameters compiled at the lens scale plus parameters such as physical dimensions. The data base consists of about eighty tables plus various pick-lists and data entry forms. Also included in the compressed file is a software module called VMS.MDB. Running of this
module modifies some database forms to give extra menu bar buttons that enable the user to create extra tables that calculate aggregate grade and tonnage figures for production, economic reserves, sub-economic reserves and geological resource at the deposit scale and total economic resource and
total geological resource at both the deposit and district scales. Also included in the compressed file is an ENDNOTE[TM]-2.0 database of references for each entry in the VMSSEDEX data base. These references have also been included as a table of text strings in VMSSEDEX to facilitate quick
retrieval of the data source.
Bedrock geology, Cortes Island, Strait of Georgia, British Columbia
Authors: Trettin H P , Roddick J A
Published: November 2010

Information obtained during earlier large-scale reconnaissance projects is here combined with results of more detailed remapping, supplemented by thin section analyses. Highly deformed sedimentary and volcanic rocks, exposed in five separate areas, are assigned
to three units that represent the uppermost part of the stratigraphic succession of Wrangellia: The Parson Bay Formation (Upper Triassic) consists of thinly interstratified resedimented limestone and calcareous sandstone and siltstone with abundant replacement chert; the Harbledown Formation
(uppermost Triassic to Lower Jurassic) consists offeldspar­rich siltstone and very fine- to fine-grained sandstone; the Bonanza Group (Lower to Middle Jurassic) consists mainly of volcanic flows and minor tuff of felsic to mafic aspect with small amounts of siltstone. Spicular chert with minor
calcareous tuff, exposed on northeasternmost Hernando Island, appears to be a Sinemurian facies equivalent of the Harbledown Formation. Granitoid rocks of the Coast Plutonic Complex, showing considerable lithological variation, intrude the three formations or are in fault contact with them. The
Complex consists mainly of tonalite and granodiorite with lesser quartz diorite and minor granite, quartz monzodiorite and diorite. A major composite pluton, showing normal zoning, is recognized on central Cortes Island. The granitoid rocks are cut by swarms of phaneritic and aphanitic dykes. Two
analyzed swarms of aphanitic dykes locally form 38% and 49%, respectively, of the rock volume. One swarm predates a granite inferred to be the youngest pluton on southern and central Cortes Island on the basis of its intrusive relationships.
Uranium-lead ages of Defeat granitoid rocks near the Con mine, Yellowknife, Northwest Territories; Radiogenic Age and Isotopic Studies: Report 15
Authors: MacLachlan K , Davis W J
Published: November 2010

The Yellowknife greenstone belt is located in the southern Slave Province, Northwest Territories, and hosts the Con and Giant lode-gold deposits. This paper reports the ages of two pre-D2 granitoid rocks of the Defeat plutonic suite from near the Con gold mine,
selected to provide a maximum age for D2 deformation zones that are broadly contemporaneous with syn-D2 mineralization in the mine area. The Pud tonalite has a U-Pb age of 2632 ± 3 Ma, defined by both zircon and titanite, and a granitic dyke has a U-Pb zircon age of 2635 ± 4 Ma. These ages
are the oldest yet determined for the Defeat plutonic suite.
Evidence for recycled Mesoarchean crust in the Ruttan arc succession, Rusty Lake belt, Trans-Hudson Orogen, Manitoba: U-Pb isotopic data; Radiogenic Age and Isotopic Studies: Report 15
Authors: Ames D E , Van Breemen O , Scoates J S
Published: November 2010

New U-Pb zircon data are reported for the Paleoproterozoic volcanic rocks in the Rusty Lake belt of the Trans-Hudson Orogen. A massive volcaniclastic sample from the Ruttan volcanic succession, host to the solitary, giant 89 Mt Ruttan Cu-Zn volcanogenic massive
sulphide deposit, yielded zircons with an age of 3.0 Ga. The zircons are interpreted as xenocrysts derived from Mesoarchean crust or from meta-sedimentary rocks containing such zircons. These data raise new questions and contribute to a better understanding of the nature and evolution of the
northeastern Trans-Hudson Orogen.
Subsurface Paleozoic structure and isopach maps and selected seismic lines in southern Northwest Territories and northern Alberta: implications for mineral and petroleum potential
Authors: Morrow D W , MacLean B C , Tzeng P , Pana D
Published: November 2010

Subsurface mapping indicates that the region northwest of the Great Slave Shear Zone contains an array of previously identified northeast-trending faults and fault zones that cross abrupt inflections of contours on structure and isopach maps. The Tathlina Fault,
faults within the Rabbit Lake Fault Zone, and the Hay River Fault are all large northeast-trending faults that lie northwest of the shear zone. Southeast of the shear zone, contours on subsurface structure maps display fewer pronounced inflections and inferred faults are fewer in number except in
the Peace River Arch area. Seismic lines in the southern Northwest Territories show smaller contractional reverse faults of Late Devonian age that have offset the Slave Point in the subsurface of the western part of the Cameron Hills. Farther east, on seismic lines near Hay River, larger high angle
thrust faults occur entirely within Precambrian strata. In both of these areas, the Slave Point and sub-Slave Point Paleozoic strata display a disturbed stratigraphy of discontinuous internal seismic reflectors. Stratigraphic disturbances such as these may indicate the presence of Pine Point types
of mineralized lead-zinc deposits, or possibly zones of natural gas.
In situ SHRIMP U-Pb geochronology of Barrovian facies-series metasedimentary rocks in the Happy lake and Josephine River supracustal belts: implications for the Paleoproterozoic architecture of the northern Hearne domain, Nunavut; Radiogenic Age and Isotopic Studies: Report
15
Authors: Berman R G , Davis W J , Aspler L
B , Chiarenzelli J R
Published: November 2010

Sensitive high-resolution ion microprobe (SHRIMP) U-Pb dates on in situ monazite grains areinterpreted to yield an age of 1886 " 6 Ma for the approximately 6 kbar metamorphism and associated S2shortening within kyanite-bearing metapelitic rocks of the Josephine
River supracrustal belt. These datademonstrate that mid-crustal shortening accompanied ca. 1.9 Ga, greater than 10 kbar metamorphism previously documented in the adjacent northwestern Hearne domain. In situ SHRIMP U-Pb monazite ages for kyanite-bearing metasedimentary rocks near Happy
lake,metamorphosed at approximately 6 kbar, form a single 1835 " 11 Ma population. An apparent correlationbetween monazite ages and textural locations, however, is interpreted to yield 1850 " 18 Ma for the age ofBarrovian metamorphism and associated S1 or S2 fabric (textural ambiguity remains), and
1826 " 15 Ma for theage of S3 staurolite. It is suggested here that the greater than 1850 Ma, S1 fabric is associated with a regionallyimportant shear zone that carried the central Hearne domain northward over the northwestern Hearne domain.
Timing of synvolcanic magmatism in relation to base-metal mineraliztion, Rouyn-Noranda, Abitibi volcanic belt, Quebec; Radiogenic Age and Isotopic Studies: Report 15
Authors: Galley A G , van Breemen O
Published: November 2010

Uranium-lead zircon dating was carried out on the 2700 Ma Flavrian-Powell subvolcanic intrusive complex in the Noranda cauldron-hosted volcanogenic massive sulphide camp in order to determine the temporal relationship between intrusion-hosted Cu-Mo and
volcanic-hosted massive-sulphide mineralization. The youngest trondhjemite phase of the Flavrian-Powell subvolcanic intrusivecomplex has an age of 2700 +3/-2 Ma, whereas a quartz porphyritic aplite dyke that crosses the Cu-Mo-Au-mineralized St. Jude intrusive breccia pipe returned an age of 2697 " 2
Ma, similar to the post-cauldron Cléricy rhyolite. In conjunction with published dates on the Flavrian-Powell subvolcanicintrusive complex, these ages restrict the main emplacement events of the intrusive complex to less than 2 million years, and disassociate the volcanogenic massive sulphide
mineralization related to the 2700 Mamagmatic event from the 2697 Ma late porphyry-type mineralization. The latter date coincides with the age of late Blake River Group volcanism and magmatism that hosts the Bousquet camp Au-(Cu) vein and auriferous volcanogenic massive sulphide
deposits.
Improved sample preparation method for SHRIMP analysis of delicate mineral grains exposed in thin sections; Radiogenic Age and Isotopic Studies: Report 15
Authors: Rayner N M , Stern R A
Published: November 2010

A new method is presented for preparing samples for contextual ion-microprobe isotopic studies of polished thin sections. Selected areas of one or more sections are cored using 4 to 8mm diameter, diamond-tipped drill bits. A 5 mm diameter epoxy cylinder is
prepared that exposes polished pieces of the analytical standard at one end. The thin-section disks and prepolished standard plug are together cast inepoxy. No further sample preparation is required, thereby preserving the original surface of the thin-section disks. This method improves the
efficiency of carrying out in situ SHRIMP analysis by overcoming the typical limitation of finding few suitable minerals exposed on any given thin section, and obviates technical difficulties associated with using this medium.
Preliminary modelling of sediment transport on the upper foreslope of the Fraser River delta
Authors: Hill P R , Davidson S H
Published: November 2010

Apreliminary modelling study of sediment transport on the foreslope of the Fraser River delta was carried out using the SEDTRANS96 model in preparation for a field measurement program. The model was run for water depths of between 2 and 40mat a hypothetical site
off Roberts Bank using a range of typical wave and current conditions. The results indicate that strong combined wave and current conditions would exist in water depths of less than 20munder moderate storm conditions. Wave-dominated ripples and plane bed were predicted to be the predominant bedforms
inshore of 15 m depth under moderate steady current velocities, but plane bed predominated when the steady current was higher. Predicted sediment transport directions are highly sensitive to wave direction. These results have been used to site a sediment transport monitoring instrument package in
February 2002.
Revised stratigraphy of the Pebble Creek Formation, British Columbia: evidence for interplay between volcanism and mountainous terrain
Authors: Stewart M L , Russell J K , Hickson C J
Published: November 2010

The Mount Meager volcanic complex hosts rocks from the youngest explosive volcanic eruption in Canada (2360 BP). Products of that eruption constitute the Pebble Creek Formation. We present a revised stratigraphy based on field work from the 2000 and 2001 field
seasons. This stratigraphy is based on volcanic and related deposits described by Hickson et al. (1999). New stratigraphic units include reworked fallout, paleolake deposits, a mixed volcanic and rock-avalanche deposit, and an intervolcanic avalanche deposit. The nature and distribution of the
Pebble Creek deposits attest to interactions between volcanism and a high-relief landscape hosting a prominent river system.
Auriferous iron-formation in the upper Hayes River area, central mainland Nunavut
Authors: Hyde D J , Jenner G A , Sherlock R L
Published: November 2010

The Committee Bay greenstone belt, underlain by the largely underexplored Archean Prince Albert group, is prospective for many different styles of mineralization. This report focuses on iron-formation-hosted gold occurrences in the upper Hayes River area,
southwestern portion of NTS 56-O near Walker Lake. In this area, gold is associated with sulphidized magnetite-silicate iron-formation and deformed sulphidic quartz veins, localized within a corridor of highly strained rocks. On the basis of deformation fabrics, sulphidation reactions and associated
gold mineralization predate or are early within the development of the main composite transposition fabric (S21S1). The deformation event associated with the deposit is interpreted to have resulted from strain partitioning into the supracrustal sequence, possibly during development of the Walker
Lake shear zone.
Using downhole geophysical logs to provide detailed lithology and stratigraphic assignment, Oak Ridges Morain, southern Ontario
Authors: Pullan S E , Hunter J A , Good R L
Published: November 2010

In a regional hydrogeology study, Oak Ridges Moraine area, southern Ontario, downhole geophysical logs from 11 deep (about 90.190 m), plastic-cased, continuously logged boreholes helped establish these sites as high-quality stratigraphic benchmarks. Acquired logs
include natural gamma, conductivity, magnetic susceptibility, spectral gamma, temperature, and seismic velocity measurements. The downhole logs provide detailed physical properties (at submetre to metre scale) that aid in lithological characterization and in determining subsurface stratigraphy.
While natural gamma, conductivity, and magnetic susceptibility logs are useful to identify varied lithological units downhole, they cannot be used alone to differentiate the Newmarket Till (a regionally significant aquitard) from overlying or underlying units. However, this till is characterized by
seismic velocities (>2500 m/s) that are significantly higher than most other sediments encountered in these boreholes. Seismic velocities also show promise as a porosity indicator and spectral gamma logs provide relative density estimates.
The 2000 southern Ontario seismic project
Authors: Ouassaa K , Forsyth D , White D
Published: November 2010

In the summer of 2000, approximately 400 km of crustal seismic reflection data were acquired across parts of southern Ontario from the Ottawa River valley to Lake Erie. Nine profiles traversed parts of the exposed and covered Central Metasedimentary Belt of the
Grenville Province to provide constraints on Grenville crustal structure and the interaction of the Paleozoic sedimentary section with the underlying Precambrian basement. The survey was conducted under LITHOPROBE to augment and extend the LITHOPROBE Abitibi.Grenville transect, with funding provided
by Ontario Power Generation and Talisman Resources. Scientific supervision of the survey was provided by the Geological Survey of Canada and the University of Western Ontario. The seismic work complements the higher resolution southern Ontario aeromagnetic survey data acquired in
1999.
Recurrence interval of seismically triggered mass-transport deposition at Orphan Knoll, continental margin off Newfoundland and Labrador
Authors: Toews M W , Piper D J W
Published: November 2010

High-resolution Huntec sparker seismic profiles from 3400mwater depth on the southeastern flank of Orphan Knoll have been correlated to long cores that extend back to the last interglacial (marine isotope stage 5). Distinctive interglacial and glacial acoustic
facies interbed with local geographically restricted acoustic facies characteristic of mass-transport deposits. The mass-transport deposits appear to be earthquake triggered, with a recurrence interval of about 70 000 years.
Geology of the Atnarko metamorphic complex, southern Tweedsmuir Park, west-central British Columbia
Authors: Israel S A , Kennedy L A
Published: November 2010

The southern portion of the Atnarko metamorphic complex is characterized by west south west-directed contractional high-strain structures within middle-greenschist- to upper-amphibolitefacies metamorphic rocks and plutonic rocks. Similar rocks in the central and
northern portions of the complex are characterized by southwest- and northeast-striking foliations and northwest-verging folds. The ages of structures in the south are not well constrained, but they may be as old as Middle to Late Jurassic, and possibly related to the thrusting of the Intermontane
superterrane over the Insular superterrane. The foliations and folds in the central and northern areas of the complex are likely younger than Early Cretaceous, and possibly related to mid-Cretaceous thrusting associated with the East Waddington Thrust
Belt.
Search for a paleoflood record using physical and geochemical properties of cores from shallow lakes, Red River valley, Manitoba and North Dakota
Authors: Medioli B E
Published: November 2010

The physical and geochemical characteristics of three lakes in the Red River valley reveal a strong anthropogenic influence on the limnological systems. Agricultural nitrogen and phosphorus input has turned Lake Louise and Horseshoe Lake into eutrophic water
bodies with brackish water and high algal production during the growing season. The consumption of oxygen results in dysoxic to anoxic lake bottoms and may account for the large quantities of organic matter preserved within the sediment. An anoxic sediment column has resulted in metal cycling and
the obliteration of any flood layers deposited in the lake basins. In contrast, Salt Lake is a well oxygenated, eutrophic saline lake. Water samples reveal distinctive and different chemical signatures for each of the lakes and for the Red River; however, chemical shifts resulting from lake-basin
inundation are not recorded in the lake-sediment cores.
Multidisciplinary evaluation of the carbonatehosted Mississippi Valley-type Pb-Zn potential of northern Alberta
Authors: Rice R J
Published: November 2010

A multidisciplinary study of Middle and Upper Devonian carbonate sequences in northern Alberta (north of latitude 56?30'N) suggests two areas with increased potential for Mississippi Valley-type lead-zinc deposits. The first is Vermilion Chutes on the Peace
River. Encouraging data for this region include 1) a Precambrian basement high; 2) the porous, bitumen-stained, and vuggy character (late calcite and dolomite cements) of the Upper Devonian upper Mikkwa and overlying Grosmont formations; and 3) a possible basement-derived structural trend in the
Devonian cover that might provide access for deepsourced metalliferous fluids. The second area is along the Clearwater River near Whitemud Falls, east of Fort McMurray, where the Middle Devonian Methy Formation is exposed. Encouraging data here include 1) two structural highs in the Keg River
Formation (Methy Formation equivalent); 2) the presence of minor amounts of saddle dolomite cement; and 3) the locally oxide-altered and faulted character of the Methy outcrop.
New opportunities for Canadian earthquake monitoring, information, and research
Authors: Cassidy J F , Rogers G C , Adams J , McCormack D , Onur T
Published: November 2010

Rapid advances in technology and decreasing costs of data collection and transmission are providing a wealth of new opportunities in earthquake monitoring, information, and hazard research. This paper outlines both the current situation and future directions of
Natural Resources Canada in terms of earthquake monitoring and information dissemination in Canada. In addition, it describes some of the new
research opportunities and products that would result from the deployment of modern, dense seismograph networks in urban areas such as greater Vancouver. These products, including 'ShakeMap', provide detailed, earthquake ground-shaking maps across urban areas. They assist with rapid emergency
response efforts after a major earthquake, and with earthquake research, planning, and damage mitigation efforts before an earthquake.
Interpretations of Precambrian basement based on recent aeromagnetic data, Mackenzie Valley, Northwest Territories
Authors: Aspler L B , Pilkington M , Miles W F
Published: November 2010

Between 1998 and 2001, the Geological Survey of Canada acquired new aeromagnetic data over the northern Mackenzie Valley, a region of long-standing hydrocarbon and mineral potential. The new data point to a hitherto unidentified structure ('Cape Bathurst line')
extending from western Great Bear Lake to Cape Bathurst. This structure may define the western limit of the Slave Province and truncate the
Great Bear magmatic zone (easternWopmayOrogen). The data also suggest that the Fort Simpson magnetic high continues west to the Tintina Fault. Although the anomaly apparently has a source in crystalline basement, we cannot demonstrate that it represents a single tectonic entity (Fort Simpson
terrane) along its entire length. The style of thrusting in the Colville Hills during the ca. 1.66 Ga Forward Orogeny has been controversial; magnetic modelling is consistent with crystalline basement thin-skinned interpretations.
Quaternary glaciomarine environments west of Committee Bay, central mainland Nunavut
Authors: Giangioppi M , Little E C , Ferbey T , Ozyer C A , Utting D
J
Published: November 2010

Maximum marine transgression limits are identified along the eastern and northern peripheries of the Ellice Hills map area (NTS 56 P), west-central coast of Committee Bay, Nunavut. An age estimate of 9000 to 8600 calendar (cal.) years BP is tentatively assigned
to the absolute maximum marine limit (approximately 240-255 m a.s.l.) along this coastline, on the basis of marine features at comparable elevations along the northeast coast of Committee Bay. The lowest marine limit, observed 50 km inland at about 180m a.s.l., is associated with a later marine
highstand. The westward-decreasing trend exhibited by the maximum marine limits is the result of relative sea-level fall during southwestward retreat of Keewatin ice. Marine fossils commonly form a shell lag atop offshore marine mud or, rarely, are in situ. Relative sea-level fall and progressive
ice retreat resulted in a succession of marine communities following initial colonization by ice-proximal species such as Portlandia arctica.
Central Baffin Electromagnetic Experiment (CBEX), Phase 2
Authors: Evans S , Jones A G , Spratt J , Katsube J
Published: November 2010

As a part of the Central Baffin Multidisciplinary Project (a collaborative effort of theGeological Survey of Canada, The Canada-Nunuvut Geoscience Centre, and the Polar Continental Shelf Project), a 45 station, 500 km long regional-scale magnetotelluric profile
was acquired. The profile crosses the northern margin of the Trans-Hudson Orogen and extends northward into the Archean Rae Craton. To the south, the profile crosses the Paleoproterozoic Piling Group. The primary goal of the experiment was to determine major geological boundaries by delineating
regional electrical structures. Preliminary analysis shows that the conductive Astarte River Formation can be mapped and used as a proxy for the base of the Piling Group. Analysis has also revealed a high conductivity contrast between the Piling Group metasedimentary rocks and the northern Archean
granite and gneissic complexes. Laboratory results indicate that the conductivity
in the Astarte River Formation is due to the high content of interconnected graphite.
Geology of the Archean Rae Craton and Mary River Group and the Paleoproterozoic Piling Group, central Baffin Island, Nunavut
Authors: Scott D J , St-Onge M R , Corrigan D
Published: November 2010

New mapping (NTS 27 B, C, 37 A, D) has characterized the supracrustal rocks of the Archean Mary River Group and their relationship to the underlying Archean basement orthogneiss units of the Rae Craton. The primary depositional unconformity that separates the
base of the Paleoproterozoic Piling Group from the Rae Craton basement has been documented across the project area. The basal, clastic Dewar Lakes formation has been subdivided into 3 informal members. Significant primary variations in thickness of the Dewar Lakes and carbonate Flint Lake formations
have been identified throughout the project area. Mafic volcanic rocks and ultramafic to mafic sills interlayered with siliciclastic rocks (Bravo Lakes formation) overlie the basal clastic rocks. Sulphidic pelite (Astarte River formation) overlies the three lowest formations. Psammite-pelite
turbidite units (Longstaff Bluff formation) blanket the entire area, and are interpreted
as an orogenic molasse. Deformation and consequent metamorphism occurred during the 1.8 Ga Trans-Hudson Orogen.
Major Quaternary sediment failures on the east Scotian Rise, eastern Canada
Authors: Piper D J W , Ingram S
Published: November 2010

Sparse, single-channel, seismic-reflection and swath-bathymetric data are integrated with industry, multichannel, seismic-reflection profiles to define the late Pliocene and Quaternary geological framework of the east Scotian Slope and Rise, and to investigate
major sediment failures on the Rise. Chronology is based on correlation with dated sections on the Laurentian Fan and at the Tantallon M-41 well site. The
late Cenozoic of the east Scotian Slope is similar to the central Scotian margin east of Verrill Canyon, except that there is less intercanyon sediment. Major sediment mass-transport events have occurred with an average recurrence interval of 0.25Masince the late Pliocene.Alarge failure on the
continental rise at 0.15Maresulted in widespread failure of almost 103 km3 of proglacial sediment in slabs hundreds of metres thick.
Preliminary report on the structural geology of the Clarence Stream - Moores Mills area, southwestern New Brunswick: implications for gold exploration
Authors: Castonguay S , Watters S , Ravenelle J -F
Published: November 2010

Significant gold occurrences located in proximity to Devonian granitoid intrusions have been recently discovered in the Clarence Stream area of southwestern New Brunswick. The area straddles the Ordovician St. Croix Terrane and Silurian Mascarene Belt, which are
variously affected by four phases of regional deformation. The St. David antiform is interpreted as a megascopic F2-F3 fold-interference structure, the southeastern limb of which is cut by the late-D3, dextral Sawyer Brook Fault. Mineralized quartz veins and breccia units within the Ordovician
Cookson Group are structurally associated with thrust-related D2 high-strain zones and folds. Southward, the occurrence of mineralized quartz veins in the Silurian Waweig Formation is influenced by the competency of gabbroic bodies, whereas late-D3 high-strain zones control their present geometry.
The distinct lithostratigraphic assemblages and the nature and location of structures hosting the gold mineralization indicate that exploration strategies should not be restricted only to the proximity of specific intrusions or shear zones.