bluuebunny/crossref_metadata_2025 huggingface dataset:
Electrical resistivity stability characteristics of water used to saturate rocks from Giant and
Con mines, Yellowknife, Northwest Territories
Authors: Connell S , Katsube T J , Scromeda N
Published: November 2010

Differences in petrophysical properties (e.g. porosity and electrical resistivity) were noted between similar rock types from Giant and Con mines in the Yellowknife mining district (Northwest Territories). For example, the time required for resistivity of the
rock samples to stabilize after pore-water saturation was considerably longer for Giant mine samples compared to Con mine samples. An exploratory study was initiated to find an explanation for these differences. This involved monitoring the resistivity of water used to immerse samples from the two
mines, over a period of 340 hours, after vacuum saturation.

Results indicate that considerable differences existed between the resistivity-time curves of the water in which the samples (sericite schist and basalt) from the mines were immersed. The resistivity of the water containing Giant mine samples was consistently higher and required considerably longer
time to stabilize, compared to the Con mine samples. These differences are consistent with the differences in the sample porosity and electrical resistivity.
Near-surface seismic-reflection studies to outline a buried bedrock basin in eastern Ontario
Authors: Hunter J A , Burns R A , Aylsworth J M , Pullan S E
Published: November 2010

A preliminary near-surface seismic-reflection study was carried out in a 10 km by 18 km area near Alfred, Ontario, to determine depth to bedrock and the potential for this technique to delineate stratigraphy within unconsolidated overburden. The work was part of
a study examining unstable Champlain Sea sediments in the St. Lawrence valley. The surficial sediments of the area include zones of surface disturbance that have been postulated to be the result of earthquake shaking, and are possibly linked to the shape of the buried bedrock surface. Forty
seismic-reflection test sites outlined a deep, bowl-shaped, bedrock basin beneath the zone of disturbed surface sediments. The circular basin is approximate 8 km in diameter with a maximum sediment thickness of 175 m. Seismic-reflection quality was excellent with dominant reflection frequencies in
the 300 Hz range; intraoverburden reflectors were identified at most test sites which indicate potential resolution of near-surface structure.
Age and extent of the Frontenac plutonic suite in the Central metasedimentary belt, Grenville Province, southeastern Ontario; Radiogenic age and isotopic studies: Report 13
Authors: Davidson A , van Breemen O
Published: November 2010

Eight U-Pb zircon age determinations extend the geographic range of the A-type Frontenac plutonic suite (1.18-1.15 Ga) for a limited distance across the boundary between Frontenac and Elzevir terranes, stitching two fundamentally different blocks of the Central
metasedimentary belt that were juxtaposed by ca. 1.2 Ga. Frontenac plutons in the boundary shear zone are deformed and recrystallized, whereas those in the Elzevir footwall and in the overriding Frontenac block are not. This study supports the interpretation that deformation and recrystallization of
the plutonic rocks in the bounding shear zone occurred during or very soon after emplacement rather than being the result of later Grenvillian tectonism, the implication in this case being that the A-type plutonism was not anorogenic.
Neodymium isotopic data from the central Wabigoon Subprovince, Ontario: implications for crustal recycling in 3.1 to 2.7 Ga sequences; Radiogenic age and isotopic studies: Report 13
Authors: Tomlinson K Y
Published: November 2010

Neodymium isotopic data on Mesoarchean supracrustal rocks of the central Wabigoon Subprovince suggest that the southern part of this terrane was relatively juvenile at 3.0-2.9 Ga whereas the northern part contains an older recycled crustal component that is at
least 3.3-3.2 Ga. Neodymium isotopic data from Neoarchean supracrustal rocks of the central Wabigoon Subprovince indicate that volcanism at 2.73-2.70 Ga was ensialic and that rocks in the northern part of the central Wabigoon Subprovince have also recycled 3.3-3.2 Ga felsic crust whereas those to
the south have recycled crust no older than 3.0 Ga.
Surficial geology of the area near the Titanic wreck
Authors: Haysom S , Piper D J W
Published: November 2010

The Atlantic Geoscience Centre has collected seismic and sample data in the region surrounding the Titanic wreck as part of a study of geological evolution and sedimentary processes on the continental rise. This report describes and interprets new 40 cu in sleeve
gun seismic profiles, 3. 5 kHz profiles, and samples collected in 1991. The seismic data shows two major Pleistocene erosion surfaces resulting from erosion by the Western Boundary Undercurrent, that separate sediments on the rise principally deposited by turbidity currents and slides. Surficial
sediment near the Titanic wreck is commonly sandy, partly as a result of deposition from a recent turbidity current down Titanic Valley and partly as a result of winnowing by the Western Boundary Undercurrent.
Geology of the Mount Martin, Fisherman Lake, and Mount Flett map areas, Yukon Territory and Northwest Territories
Authors: Fallas K M , Lane L S
Published: November 2010

Regional mapping in Fort Liard and La Biche River (NTS 95 B, 95 C) was initiated during 2000 at a scale of 1:50 000 in the Mount Martin, Fisherman Lake, and Mount Flett map areas. In the Mount Martin area, a primary focus was the recognition and documentation of
three stratigraphic units: the Permian Tika map unit, the Triassic Toad-Grayling Formation, and the Lower Cretaceous Sikanni Formation. Facies changes and sub-Cretaceous erosion are major controls on the distribution of these units within the project area. Although the regional distribution of rock
units on existing reconnaissance maps is broadly appropriate, our new mapping already has resulted in substantial revisions and updates. The distribution of major structures is also being significantly revised as a result of our more detailed investigations.
Targeted fieldwork in the Daly Bay Complex, Hudson Bay, Nunavut
Authors: Hanmer S , Williams M L
Published: November 2010

The Daly Bay Complex is a large (2500 2 km in area), sheet-like body of mafic to anorthositic rocks, tonalite, and paragneiss of unknown age that was intruded into the lower crust, possibly during the Paleoproterozoic. Magmatic advection of heat led to
granulite-facies metamorphism, localized within the magmatic body and large panels of aluminous country rock included within it. Initial high-temperature granulite-facies orthopyroxene and plagioclase metamorphic assemblages were replaced by garnet- and clinopyroxene-bearing assemblages as the
complex cooled isobarically. It is improbable that the Daly Bay Complex was tectonically transported any significant dis- tance while granulite-facies conditions prevailed.
Preliminary report on the geology and controlling parameters of the Goldcorp Inc. High Grade zone, Red Lake mine, Ontario
Authors: Dubé B , Williamson K , Malo M
Published: November 2010

The association of axial planar carbonate veins, high-grade ore zones, and an F 2 fold hinge deforming the basalt-ultramafic contact in the Goldcorp Inc. High Grade zone suggests a local geological control by an F 2 fold. The development of such an F 2 fold was
potentially critical in forming the structures hosting the veins and in control- ling fluid circulation allowing formation of the carbonate extensional veins within the basalt and their subsequent Au-rich silicic replacement. The CO 2 -rich and auriferous silica-rich fluids were preferentially
focused in a low-pressure F 2 hinge due to a combination of factors including competence contrast, tangential longitudinal strain associated with F 2 , and east-southeast-trending high-strain zones. The altered ultramafic rock acted as a less per- meable barrier controlling fluid migration along the
folded contact, allowing supralithostatic fluid pressure to build up and inducing a ponding effect in the basalt underneath, to create wide, high-grade ore zones in low-pressure hinges. The Au-rich silicic replacement of the carbonate veins was potentially syn- to late-D 2 . Subsequent strain
remobilized gold in late, extremely high-grade structures.
The characterization of aliettite-bearing rocks of the Olympus mine, Stanleyville, Ontario
Authors: Sarfi M , Percival J B , Miles N
M , Ercit S T , Hunt P
A
Published: November 2010

Aliettite, a rare, regularly interstratified talc-smectite clay mineral, occurs at the Olympus mine, Stanleyville, Ontario. The mine was originally developed for its vermiculite, which formed by hydrothermal alteration of metapyroxenite associated with local
thrust faulting. The metapyroxenite generally consists of tremolite and diopside that have been replaced by talc, aliettite, and serpentine. Three stages of hydrothermal alteration are recorded, 1) replacement of tremolite and diopside by talc and phlogopite, 2) minor oxidation result- ing in
Fe-oxide-staining of talc, and 3) serpentinization of the phlogopite. The results suggest that aliettite formed by surface weathering superimposed upon earlier, low-temperature hydrothermal alteration.
Analyse structurale de l'écaille de Philipsburg, zone de Humber externe des Appalaches du sud du Québec
Authors: Séjourné S , Malo M
Published: November 2010

The dominant structure of the Philipsburg thrust slice is a regional north-northeast-trending syncline associated with numerous minor folds. The thrust slice is cut northward by east-west thrusts and eastward by north-northeast thrusts. Westward, it is limited by
the Logan's Line. Six structural domains have been identified on the basis of structural position and style of deformation. Crosscutting relationships between observed structural elements can be used to establish the tectonic history of rock units of the Philipsburg Group, as follows: 1) regional
folding during overthrusting by the Stanbridge nappe, 2) local collapse of structures, 3) reactivation of pre-existing faults during the tectonic slicing and thrusting over the St. Lawrence platform, and 4) late north-south and east-west transcurrent faulting.
Volcanisme pyroclastique protérozoïque dans le Groupe de Wakeham, région des lacs Musquaro et d'Auteuil, Province de Grenville, Québec
Authors: Corriveau L , Bonnet A -L
Published: November 2010

The reinvestigation of two supracrustal tongues representing southeasterly extensions of the Wakeham Group, eastern Grenville Province, reveals conclusive evidence of volcanism in this Mesoproterozoic essentially detrital sequence. These volcanic rocks comprise a
variety of intermediate to felsic lapilli tuf and lapillistone intercalated with massive or banded felsic beds of uncertain origin, some akin to flow-banded rhyolite. In the lapillistone, elon- gated wispy fragments with quartz mosaics flow around angular to rounded lapilli and resemble vesicular
pumice. Finely laminated, chaotic injections repeatedly intrude one tuf. The adjacent arenite units are interbedded with nodular muscovite gneiss and locally with marble, garnetiferous hornblendite, garnetite, and magnetite-bearing coticule. Coticule with yellowish to dark pink garnets outcrops as
in situ rafts within the adjacent granite. The asso- ciation of coarse felsic pyroclastic rocks with quartz-feldspar porphyry and magnetite-bearing coticule within metasedimentary rocks constitutes a geological context favourable for base-metal exploration.
Response of active-layer and permafrost temperatures to warming during 1998 in the Mackenzie Delta, Northwest Territories and at Canadian Forces Station Alert and Baker Lake, Nunavut
Authors: Smith S L , Burgess M M , Nixon F M
Published: November 2010

Active-layer and permafrost temperature data collected in the Mackenzie Delta, at Canadian Forces Station Alert and Baker Lake have been analyzed along with climatic data to determine the response of the active layer and the ground thermal regime to the anomalous
warming associated with strong El Niño conditions of 1998. In the Mackenzie Delta region, early warming in 1998 resulted in earlier thaw of the active layer, warmer summer ground temperatures, and a longer thaw season which produced greater thaw penetration compared to previous years in the
1990s. At Baker Lake, warming was less pronounced and occurred later in the summer resulting in a slight extension of the thaw season into the fall. Warming was less extreme in the high Arctic but snow depths were greater at CFS Alert in 1998 and this appears to have resulted in higher shallow
ground temperatures during the winter (February to April) of 1998.
Till geochemistry of the Nechako River map area (NTS 93F), central British Columbia
Authors: Plouffe A , Levson V M , Mate D J
Published: November 2010

Following the Canada-British Columbia Agreement on Mineral Development (1991-1995) and the Nechako NATMAP Project (1995-2000), the British Columbia Geological Survey Branch and the Geological Survey of Canada have completed a series of regional and reconnaissance
till geochemistry surveys within the Nechako River map area (NTS 93F). This report presents a compilation of the geochemical analyses conducted on the clay- (<0.002 mm) and silt and clay-sized (<0.063 mm or 230 mesh) fractions of till. Results for gold and pathfinder elements
(arsenic, barium, mercury, antimony), base metals (copper, lead, zinc), molybdenum, and three lithophile elements (aluminium, magnesium, sodium) are presented on colored geochemical maps and discussed in the text. Interpretation of the till geochemistry data takes into account, bedrock geology,
known mineral occurrences, ice-flow history, analytical and digestion methods, and grain size of the analyte. Several sites with anomalous metal concentrations in till and not located near known mineralization are indicated. These reveal the high potential for new mineral discoveries within the
Nechako River map area.
Preliminary interpretations of new aeromagnetic data for the Atlin map area, British Columbia
Authors: Lowe C , Anderson R G
Published: November 2010

Approximately 30 375 line kilometres of high-resolution aeromagnetic data were acquired in the Atlin map area (NTS 104 N), northwestern British Columbia, between September 2000 and March 2001. The survey, flown by SIAL Geosciences Inc. under contract to the
Geological Survey of Canada, was funded by the federal government's Targeted Geoscience Initiative. Much of the surveyed area is underlain by oceanic sedimentary, volcanic, and volcaniclastic rocks interleaved with structural panels of ultramafic and other ophiolitic rocks that make up the Cache
Creek Terrane. Significant contrasts in magnetic proper-ties among many of these rock types result in a data set that is rich in magnetic anomalies and trends and, as such, a valuable aid to bedrock mapping and mineral exploration currently underway in the region.
Stratigraphic framework for the Cambrian Chaudière Nappe in the external domain of the Humber Zone in the Quebec Re-entrant, and preliminary correlation with adjacent stratigraphic frameworks
Authors: Lavoie D
Published: November 2010

The Chaudière Nappe is limited to the north by the Logan's Line and associated mélange units, and to the south by the Foulon Fault. Sedimentary units of the Chaudière Nappe form the Sillery Group which consists of the Sainte-Foy, Saint-Nicolas, and
Breakeyville formations. The biostratigraphic information suggests that the Saint-Nicolas Formation is Early Cambrian. The Sainte-Foy Formation tectonically underlies the Saint-Nicolas Formation, the former consists predominantly of variously coloured mudstone. The Saint-Nicolas Formation is divided
into three units: a lower massive and coarse-grained sandstone, a middle cyclic turbidite, and an upper red mudstone. The Breakeyville Formation consists of two units, a lower conglomerate-sandstone and an upper mudstone-sandstone. Correlation with adjacent stratigraphic frameworks is based on the
recognition of the massive lower unit of the Saint-Nicolas Formation in other successions, and on correlation of the lower conglomerate of the Breakeyville Formation with Upper Cambrian conglomerate in eastern Quebec.
Lithogeochemistry of Ordovician sedimentary rocks associated with Ni-Co stream-silt anomalies along Ritchie Brook, Kedgwick map area, northern New Brunswick
Authors: Carroll J I
Published: November 2010

The Upper Ordovician Grog Brook Group is composed of 1) a lower siltstone-dominated unit, 2) a thin-bedded carbonaceous and sulphidic shale unit, and 3) an upper sandstone-dominated unit. In the north-central part of the map area, which is traversed by Ritchie
Brook, these units are spatially associated with magnetic and Ni-Co stream-silt anomalies. Twenty-one samples were collected along Ritchie Brook and analyzed for selected major and trace elements. The MnO content is higher in the sandstone-dominated unit than in the lower two units. Organic carbon
content is greater within the lower two units, reflecting more reducing conditions and/or higher organic productivity at the time of deposition. The major-element content of the carbonaceous shale unit is indistinguishable from that of the siltstone-dominated unit. Although the carbonaceous shale is
weakly 'metalliferous', it is not the source of the Ni and Co anomalies identified in the area. An unknown subjacent source is inferred.
Groundwater resources assessment in the Carboniferous Maritimes Basin: preliminary results of the hydrogeological characterization, New Brunswick, Nova Scotia, and Prince Edward Island
Authors: Stapinsky M , Michaud Y , Morin R H , Butler K E , Deblonde C , Chi G , Thériault T , Castonguay S , Boisvert V , Julien H P , Conohan D , Hulsman B , Carrier C , Marion J , Boisvert E
Published: November 2010

The study area is located in the Carboniferous Maritimes Basin, which consists of sedimentary rock sequences covering parts of New Brunswick, Nova Scotia, and Prince Edward Island. Extensive field-work was carried out during the summer of 2001 to initiate the
characterization of the main aquifers in the basin, including: a regional water-level survey; hydraulic testing; drift, rock, and groundwater sampling; installation of shallow monitoring wells; and surface and borehole geophysical surveys. A preliminary assessment of the groundwater resources in the
basin is underway based upon existing information and new fieldwork results. More specifically, a piezometric map displaying regional groundwater flowlines has been prepared along with a series of assessments regarding the geological context and the hydraulic properties of distinct rock units and
surficial deposits.
Geological Survey of Canada radiocarbon dates XXXIII
Authors: McNeely R
Published: November 2010

This list presents 195 radiocarbon age determinations made by the Radiocarbon Dating Laboratory, Geological Survey of Canada, plus 27 AMS dates done by other laboratories (AA, Beta, and TO). The total number (195) of samples from various areas is as follows:
Newfoundland (23); Nova Scotia (38); Quebec (50); Ontario (11); Alberta (11); Northwest Territories, mainland (10); Northwest Territories, Arctic Archipelago (12); Nunavut (23); and international (17). Fifteen samples were dated as part of the International Geological Correlation Programme: Project
274 on Coastal Evolution in the Quaternary. Tables 1 and 2 summarize the details of background and standard counts for the 2 L and 5 L counters during the period from January through December 1992.
Bovie structure: A decapitated thrust?
Authors: MacLean B C
Published: November 2010

Bovie Structure, a major north-south striking feature, extends over 175 km in the subsurface and subsurface of northeast British Columbia and southern Northwest Territories and defines the eastern limit of Liard Basin. Its structural history has been variously
described as extensional, compressional, wrench and combinations thereof. The extensional 'Bovie Fault' found on surface maps is not supported by the seismic data. Examination of seismic and well data leads to a model in which Bovie Structure is the product of two intersecting compressional faults.
The first, established as late as latest-pre-Cretaceous (and likely reactivated during the Cretaceous) was predominately vertical in motion, westward-directed and rooted in basement. The second, a product of Laramide thin-skinned deformation, was largely horizontal in effect, eastward-directed, with
movement along a shallow detachment within the shales of the upper Banff Formation. The surface Bovie Anticline is seen as a block decapitated from the hanging wall of the earlier compressional uplift and carried eastward and upward during Laramide deformation.
Preliminary report on the U-Pb geochronology of the northern margin of the Trans-Hudson Orogen, central Baffin Island; Radiogenic Age and Isotopic Studies: Report 15
Authors: Wodicka N , St-Onge M R , Scott D J , Corrigan D
Published: November 2010

A 2827 +8/.7 Ma age for a monzogranite represents the first confirmation that Archean crust forms the cores of antiformal culminations in the Dewar Lakes area, and is consistent with the suggestion that these culminations represent erosional windows exposing the
southernmost edge of the Rae craton. A2719 " 4 Ma megacrystic monzogranite from the northern Archean basement is temporally and lithologically similar to ca. 2726.2714 Ma megacrystic granite bodies in the Eqe Bay area to the northwest. Uranium-lead dating of a biotite-allanite monzogranite reveals a
Neoarchean emplacement age of 2738+25/.21 Ma, suggesting that Paleoproterozoic plutonic rocks within the Archean basement in the Flint Lake area may not be as extensive as previously suspected. A crystallization age of 1897 +7/.4 Ma for a K-feldspar-megacrystic monzogranite, previously correlated
with the mostly 1.87.1.85 Ga Cumberland batholith, indicates that psammite enclaves within the pluton must be older than ca. 1.90 Ga.
Surficial geology of the Scotian Slope, eastern Canada
Authors: Piper D J W , Campbell D C
Published: November 2010

Sediment type on the upper 5 cmof seafloor has been mapped on the Scotian Slope using core samples, acoustic backscatter in sidescan sonar and multibeam bathymetry, observations from submersibles, and high-resolution acoustic profiles. The upper slope is
underlain by overconsolidated till with iceberg pits and scours, overlain in water depths of <300mby mobile fine sand in the east and sand and gravel in the west. Muddy fine sand occurs on canyon heads and floors to water depths of about 1000 m. Mudstone outcrops on some canyon walls,
with intervening terraces with mud and locally sand deposits. Intercanyon ridge crests <800 mbsl have surface-winnowed sand; similar sand occurs locally on ridge crests to depths of 1500 mbsl. Even low hills in deep water may have winnowed sandy mud at the seabed. The deeper continental
slope is generally floored with bioturbated mud changing to foraminifer-rich mud beyond 3000 mbsl. These observations on sediment distribution are important for understanding biological habitat and assessing modern seafloor reworking by currents.
Late Cenozoic geology, Ancient Pacific Margin NATMAP Project, report 6: glacial limits, Middle Pleistocene sediments, and placer gold in the Scroggie Creek basin, south Klondike placer region, Yukon Territory
Authors: Rotheisler P N , Jackson L E , Hicock S R
Published: November 2010

Gravel type and the distribution of erratics along the Walhalla-lower Scroggie Creek valley imply an all-time limit of glaciation between those proposed by previous researchers. Associated valleytrain deposits fine downstream along Walhalla and Scroggie creeks. A
depositional record potentially spanning two Middle Pleistocene stadial/interstadial cycles occurs along Mariposa Creek. Interstadials or interglacials are represented by organic sediments rich in wood detritus including branches and logs, whereas stades or glaciations are represented by
interstratified stony colluvium that lacks organic content. Placer gold in the Scroggie Creek basin is typically coarse and difficult to procure by panning. An examination of gold recovered by placer mining suggests that at least two lode sources occur in the basin. The re-evaluation of the all-time
limits of glaciation suggests that a large area of undisturbed terrain within the Scroggie Creek and Walhalla Creek basins may contain viable placer deposits.
Preliminary drilling results from the Pemberton Valley, British Columbia
Authors: Simpson K A , Stasiuk M V , Clague J J , Evans S G , Friele P
Published: November 2010

The Mount Meager volcanic complex experiences frequent landslides and is a potentially active volcano that last erupted 2350 years ago. The combination of loose, altered volcanic material and steep topography is thought to be responsible for the significant
landslide hazard. Sediments obtained from drilling in the Pemberton Valley record both landslide events and volcanic eruptions from the Mount Meager volcanic complex over the past 6500 years. Three major debris-flow deposits were identified, ranging from 0.6 to 8 m in thickness. Two of the
debris-flow deposits were dated at approximately 2600 and 6200 years ago. The third debris-flow deposit is inferred to be approximately 4000 years old. The remainder of the drill-core sediments record typical meandering-river-valley sedimentation. Long-term sedimentation rates for the Pemberton
Valley range from 1 to 7 mm per year. This paper is intended as an update for the Pemberton Valley landowners, rather than as a detailed scientific communication.
Llangorse volcanic field, British Columbia
Authors: Harder M , Russell J K , Anderson R G , Edwards B R
Published: November 2010

The Llangorse volcanic field is located southeast of Atlin, British Columbia, and is part of the larger Atlin volcanic district of the Northern Cordilleran volcanic province. The Llangorse volcanic field comprises seven localities of Neogene to Quaternary
volcanic rocks: Hirschfeld Creek-Line Lake, Mount Sanford, Llangorse Mountain (sites 1, 2, 3, and 4), and Chikoida Mountain. The compositions of lava from these centres include olivine nephelinite, basanite, and alkali olivine basalt; all of the Llangorse Mountain sites are basanite. During the
summer of 2002, the Llangorse Mountain sites and Chikoida Mountain were mapped in detail as part of the Atlin Targeted Geoscience Initiative, and the results are described in this paper. These exposures of volcanic rocks represent erosional remnants of valley-filling lava flows. Furthermore, many of
these volcanic rocks show features that suggest impoundment against or eruption under ice.
Stratigraphy and structure of the Upper Arrow Lake area, southeastern British Columbia: new perspectives for the Columbia River Fault Zone
Authors: Lemieux Y , Thompson R I , Erdmer P
Published: November 2010

The Columbia River Fault Zone in the southeastern Canadian Cordillera has been interpreted as a major Eocene crustal-scale detachment having tens of kilometres of east-side-down displacement. It is one of a family of extension faults mapped in the southeastern
Cordillera and interpreted to have accommodated crustal extension during the early Tertiary (ca. 50-55 Ma). Recent field investigation has suggested that an Upper Paleozoic rock succession occurs as a semicontinuous belt from west of Vernon to east of the Columbia River Fault. This belt comprises a
distinctive Devonian calcareous quartzite marker unit that can be traced across Upper Arrow Lake. Field relationships of the Columbia River Fault Zone suggest that proposed displacement on the fault is inconsistent with continuity of rock units from hanging-wall to footwall exposures. The geometry
and significance of the Columbia River Fault Zone along Upper Arrow Lake may
be overstated.
Overview of Neogene to Recent volcanism in the Atlin volcanic district, Northern Cordilleran volcanic province, northwestern British Columbia
Authors: Edwards B R , Russell J K , Anderson R G , Harder M
Published: November 2010

We present an overview and summary of recent field and geochemical studies on Neogene to Recent mafic alkaline volcanic rocks in the Atlin volcanic district, one of the major subdivisions within the Northern Cordilleran volcanic province. The volcanic deposits in
this district are subdivided into two spatially separated volcanic fields, Surprise Lake and Llangorse. Both comprise mafic alkaline rocks, which
range in composition from alkaline basalt to nephelinite, contain abundant populations of felsic and peridotitic xenoliths, and locally directly overlie deposits of late Tertiary-Quaternary gravels. In two locations, Ruby Creek and Volcanic Creek, the Au-bearing gravels are being actively mined
(Ruby Creek) or explored (Volcanic Creek). Field relationships suggest that many volcanic features in the Atlin district formed during the Quaternary.
Overview of the Atlin Integrated Geoscience Project, northwestern British Columbia, year three
Authors: Lowe C , Mihalynuk M G , Anderson R G , Canil D , Cordey F , English J
M , Harder M , Johnson S
T , Orchard M , Russell K , Sano H , Villeneuve M E
Published: November 2010

The Atlin Integrated Geoscience Project, jointly funded by federal and provincial governments, entered its third and final year in 2002-2003. It is designed to advance understanding of the geological evolution and mineral potential of the northern Cache Creek
terrane.
Project accomplishments for year three include 1) characterization of Cache Creek Group biostratigraphy and tectonostratigraphy; 2) new surficial geology map outlining placer potential in the Atlin area; 3) improved understanding of the age, composition, emplacement, and metallogenic potential of
Mesozoic plutonic rocks; 4) better definition of the distribution and paleoenvironment of Neogene
volcanism; 5) delivery of a one-day workshop on magnetic surveying to prospectors and the general public. High-grade copper mineralization was discovered by personnel from the provincial survey. The discovery, named Joss'alun, is hosted within oceanic crustal rocks of the Cache Creek terrane.
Mineralization appears concordant with the enclosing volcanic stratigraphy. If syngenetic, it establishes the terrane's volcanogenic massive sulphide potential.
Lead-zinc showings associated with debrite shed from synsedimentary faults, Mesoproterozoic Society Cliffs Formation, northern Baffin Island, Nunavut
Authors: Turner E C
Published: November 2010

Showings near the Adams River valley on northern Baffin Island are hosted by lowermost strata of the Mesoproterozoic Society Cliffs Formation. They are characterized by galena, sphalerite, iron sulphide, sparry dolomite, diagenetic quartz, and bitumen. Host
rocks are terrigenous dolo-wacke debrite and turbidite shed from fault blocks that were active during sedimentation, and crackle to rubble breccia in the featureless brown dolostone that encloses the debrite and turbidite lobes. Although the late breccia that contains sulphide mineralization is
visually similar to early (synsedimentary) breccia, it can be distinguished from the latter by examining the interstitial fill: early brecciation is associated with finely crystalline, pale dolomite, whereas late brecciation is associated with coarse sparry dolomite. The structural,
stratigraphic, and sedimentological controls on mineralization at Adams River may be similar to those at other, hitherto unstudied showings in the Borden Basin, as well as the Nanisivik deposit.
New contributions to the stratigraphy of the Mesoproterozoic Society Cliffs Formation, Borden Basin, northern Baffin Island, Nunavut
Authors: Turner E C
Published: November 2010

Rocks examined at three widely spaced locations in the Mesoproterozoic Society Cliffs Formation suggest that the basin was more paleoenvironmentally and bathymetrically differentiated than had hitherto been believed. Dolomitic, shallow subtidal and peritidal
settings in the southeast pass through a platform-rimming facies and limestone-shale slope into a peculiar, dolostone-dominated basin floor in the northwest that was below storm wave-base. An unusual terrigenous dolowacke, containing angular to rounded quartz and lithic clasts and found at two of
the three locations, suggests that synsedimentary faulting was more active during Society Cliffs time than has hitherto been recognized.
Aeromagnetic survey program of the Geological Survey of Canada, 2002-2003
Authors: Dumont R , Kiss F , Coyle M , Potvin J , Oneschuk D , Dostaler F
Published: November 2010

In 2002, the Geological Survey of Canada supervised an aeromagnetic survey contract totalling 28 400 line-km in the Bonnet Plume Basin-Peel Plateau region of the Yukon and Northwest territories. A detailed, time-domain-electromagnetic-magnetic survey in the
Timmins-Kirkland Lake area, totalling 11 408 line-km, was also completed. Four additional aeromagnetic survey projects in southern New Brunswick, Committee Bay in Nunavut, and Colville Lake and the Mackenzie Delta in the Northwest Territories, flown in the previous year, were also published in
2002.
A method to determine electrode polarization characteristics
Authors: Katsube T J , Scromeda-Perez N
Published: November 2010

Spectral induced polarization (spectral-IP) characteristics of pairs of graphite electrodes have been measured to determine the capacitance characteristics of the electrochemical double layers on their surfaces. The purpose was to establish a method to determine
these characteristics so that the electrode effects could be subtracted from spectral-IP measurements of rock or soil samples, using a two-electrode system. Whereas four-electrode systems automatically eliminate such effects, complications develop when wide frequency ranges or varied pressure
systems are used, and when textural elements of the electrical mechanisms in rocks and soils are studied.
Electrode characteristics are represented by capacitance over electrode surface area (CE/A) and its frequency dependence coefficient (áE). Results indicate that CE/A and áE display ranges of 1.06 x 10-4 to 4.98 x 10-4 F/cm2 and 0.181 to 0.360, respectively, and that the repeatability of
these values is required to increase the efficiency and accuracy of spectral-IP measurement.
Lead-isotope ratio measurements on hummock and hollow peat from Detour Lake area, Ontario
Authors: Bell K , Kettles I M
Published: November 2010

Lead-isotope ratios determined for peat from a hummock and hollow sequence in a peatland near Detour Lake in northeastern Ontario are variable (206Pb/207Pb of 1.14 to 1.27 in peat and 1.17 to 1.19 in till) and indicate input of Pb from different sources. Although
the Pb-isotope ratios show a pattern of systematic decrease during the last 100 years (206Pb/207Pb from 1.21 to 1.14), there is not a corresponding pattern of systematic change in Pb abundances. The Pb-isotope data, along with the Pb and Sc abundance data, from the hummock samples are best explained
by Pb inputs from anthropogenic activities. Highest Pb-isotope ratios (206Pb/207Pb of 1.269) are found in hollow peat formed during the xerothermic period, 6500 to 4000 BP, a time when warmer and drier conditions affected most environmental systems.
Geology of the Doris North gold deposits, northern Hope Bay volcanic belt, SlaveStructural Province, Nunavut
Authors: Carpenter R L , Sherlock R L , Quang C , Kleespies P , McLeod R
Published: November 2010

Gold mineralization at Doris North is hosted in a conformable succession of mafic volcanic and gabbroic rocks that are folded into a tight, shallowly north-plunging antiform. Mineralization is invariably hosted in continuous white quartz veins displaying
semiregular sericite and tourmaline-rich septa.Ahydrothermal alteration assemblage of iron dolomite, sericite, paragonite, and pyrite overprints mafic volcanic
and gabbroic host rocks. Three significant, north-trending vein systems are known: West Valley Wall, Central, and Lakeshore veins. The Hinge zone occurs where the Central and Lakeshore veins merge. The overall geometry of the vein systems closely mimics the regional antiformal fold geometry in
basaltic and gabbroic rocks. Textural relationships are consistent with vein emplacement along structural weaknesses created by pre-existing or developing fold structures.
Volcanic stratigraphy, structural geology, and gold mineralization in the Wolverine-Doris corridor, northern Hope Bay volcanic belt, Nunavut
Authors: Sherlock R L , Carpenter R L , Quang C
Published: November 2010

The northern part of the Hope Bay volcanic belt is a mainly bimodal volcanic assemblage. The mafic suite includes intercalated Mg- and Fe-tholeiitic basalts with textural variations. The felsic suite includes dacitic volcaniclastic rocks and coherent flows or
sills, with subvolcanic intrusions. The Windy lake felsic rocks show a gradation to more proximal phases to the north. There is good evidence for a
synvolcanic structure that juxtaposed different volcanic suites and is capped by a sedimentary package without any obvious offset. Gold mineralization in the area is variable in terms of alteration and morphology, but all types originated during a progressiveD2 event. Synvolcanic mineralization is
also recognized at lithological contacts, mainly within the felsic volcanic suites.
Bedrock mapping in the Walmsley Lake area, southeastern Slave Province, Northwest Territories
Authors: Cairns S R
Published: November 2010

Bedrock mapping in the Walmsley Lake map sheet (NTS 75 N) was completed during the 2002 field season. Highlights include the identification and delineation of an Archean mafic to ultramafic gabbro-anorthosite suite, and delineation and closure of the Cook
volcanic belt. Deformation fabrics in the southern and western portions of the map sheet, where mapping was concentrated in 2002, define broad,
open domes and basins, and metamorphic assemblages indicate temperatures above minimum melting conditions. Field relationships suggest the peak of metamorphism and synmetamorphic deformation occurred later in this area than farther north, where greenschist facies assemblages formed before ca. 2605
Ma. Mapping of Proterozoic mafic dykes revealed evidence that at least two dyke swarms may have seen multiple generations of intrusion. The fracture systems that host the mafic dyke swarms may have served as conduits
for more than one generation of mantle-derived magma.
Teleseismic investigations of the lithosphere beneath central Baffin Island, Nunavut
Authors: Snyder D
Published: November 2010

From summer 2000 to summer 2002, five self-contained seismic stations were established and operated on central Baffin Island to study the lithospheric structure across the Proterozoic-Archean boundary, the northern margin of Trans-Hudson Orogen. Crustal thickness
estimates decrease steadily from 40 (±2) km in the southeast to 37 (±2) km beneath the Archean block in the northwest. Prominent southward-dipping mantle discontinuities occur beneath the southeasternmost stations at about 100 and 140 km depth, defining
a layer of increased seismic velocity. Crustal discontinuities occur at 2 and 15 km depths beneath these stations. Two layers with differing anisotropic properties are also indicated in the south from observed azimuthal variations in the splitting of teleseismic SKS-waves: probable axes of
anisotropy strike at 82° and 41°. In the north, neither clear discontinuities nor anisotropy are observed, suggesting a heterogeneous lithosphere.
Deformation history and metamorphism of a synformal depression, Longstaff Bluff Formation metaturbidite, central Baffin Island, Nunavut
Authors: Allan M M , Pattison D R M
Published: November 2010

A metamorphism-deformation history has been reconstructed for a small area of polydeformed metaturbidite of the Longstaff Bluff Formation on the northern margin of the Foxe Fold Belt, central Baffin Island. The area studied is an elongate synformal depression
with main fold features related to the ca. 1.8 Ga Trans-Hudson Orogen. Pelite and semipelite contain low-pressure cordierite±andalusite assemblages. Field and microstructural relationships document four tectonic events, constrained with respect to metamorphic mineral growth events. Cordierite
and prismatic andalusite growth (550-580°C, 3-3.5 kbar) postdates a weak early fabric (S1) and predates the development of a regionally penetrative, north-dipping fabric (S2) related to orogen-parallel folding (D2). Late interstitial andalusite growth (580-600°C, 3.5-4.0 kbar) postdates D2
and represents peak metamorphism. Late, locally developed crenulation cleavages
record one approximately orogen-parallel event (D3) unrelated to any regional structures and a second event (D4) that may be related to late north-trending regional crossfolding.
Iron-formation hosted gold occurrences in the Ellice Hills area, Committee Bay belt, Nunavut
Authors: Deyell C , Sherlock R L
Published: November 2010

The supracrustal rocks of the Committee Bay belt are dominated by clastic sedimentary rocks, ultramafic flows and intrusions, iron-formation, and quartz arenite, with lesser amounts of mafic to felsic volcanic rocks. In the Ellice Hills area, three
iron-formation-hosted gold prospects are recognized: the Inuk, Mist-Koffy, and Peanut showings. In these occurrences, gold mineralization is localized in areas where
progressive D2 deformation has resulted in dilational settings, either at lithological contacts within high-strain zones or in the hinges of F2 folds. These dilational settings allowed for synkinematic alteration and gold introduction associated with sulphidation of iron-formation. These
structural/stratigraphic settings are similar to those of gold deposits in the Hayes River area of the Committee Bay belt, and those of the Meadowbank deposits of the Woodburn Lake group. Initial interpretation of the deformation fabrics suggest that much of the iron-formation-hosted gold
mineralization in the Committee Bay belt may be Paleoproterozoic in age.
EXTECH IV Athabasca uranium multidisciplinary study of northern Saskatchewan and Alberta, Part 2: current results of subprojects 1 to 5
Authors: Jefferson C W , Delaney G , Olson R A
Published: November 2010

Fifteen subprojects aim to enhance the geoscience framework and EXploration TECHnology for the world-class McArthur River camp as an aid to uranium exploration in the Athabasca Basin and elsewhere. Subprojects 1 to 5, reported on here, mainly serve as a framework
to help focus technology: 1) seismic imaging of the stratigraphy, the unconformity, the P2 reverse-fault zone, possible alteration zones, the
orebody itself, and a deep reflector possibly representing a mafic sill and heat source for hydrothermal convection; 2) quantitative linking of geophysical and geological parameters by multiparameter borehole geophysics; 3) determination of the paragenesis of organic matter, both Proterozoic and
Phanerozoic (but all postdating the ore and therefore not a guide); 4) establishment of a quantitative lithological and sequence-stratigraphic framework across drill camps and six regional deposystems; 5) mapping, simplifying, and correlating basement domains and their boundaries; and 4a / 5a)
relating uranium to reactivation structures and sedimentary style in paleovalleys.
EXTECH IV Athabasca uranium multidisciplinary study of northern Saskatchewan and Alberta, Part 3: current results of subprojects 6, 6a, 7, 9, 10, and 11
Authors: Jefferson C W , Delaney G , Olson R A
Published: November 2010

Fifteen subprojects aim to enhance the geoscience framework and EXploration TECHnology to calibrate typical ore, host-rock and alteration parameters of the world-class McArthur River camp as an aid to uranium exploration in the Athabasca Basin and elsewhere.
Subprojects 6, 6a, 7, 9, 10, and 11, reported on here, are a blend of exploration technology with some framework elements, as follows: 6, 6a) calibration and interpretation of enigmatic U-K-Th domains and of a ribbon-shaped K-U anomaly in high-resolution airborne NATGAM (National Gamma-Ray
Spectrometry Program) data; 7) mineralogical refinement of alteration vectors to ore and calibration of a new field infrared spectrometric device; 9) magnetotelluric imaging of conductive and altered zones; 10) gravimetric detection of basement highs and alteration zones; and 11) detrital-zircon and
basement geochronology by SHRIMP (Sensitive High Resolution Ion Microprobe), documenting provenance of deposystems and timing of Paleoproterozoic basin development.
Structural geology of the northeastern Committee Bay belt, Ellice Hills area, central Nunavut
Authors: Sanborn-Barrie M , Sandeman H , Skulski T , Brown J , Young M , MacHattie T , Deyell C , Carson C , Panagapko D , Byrne D
Published: November 2010

The Ellice Hills map area, northeastern Committee Bay area, comprises several belts of supracrustal rocks separated by large tracts of plutonic rocks of variable composition and texture. The main, >80 km long supracrustal belt is the most complex
structural domain, containing structures attributed to three deformation events: bedding-parallel S1 foliation; northeast-striking S2 fabrics axial-planar to northeast- trending F2 folds; and conjugate, kink-style F3 folds and north-northwest-striking faults. North of the main belt, mafic and
ultramafic volcanic rocks with subordinate metasedimentary rocks form several narrow, northeast-trending, short strike-length belts that are penetratively affected by northeast-trending D2 fabrics and folds. Regions of intervening plutonic rocks typically carry a northeast-strikingD2 fabric and are
structurally less complex, due to their initial isotropic character and lower degree of accumulated finite
strain. The southernmost batholithic complex is characterized by south-striking, west-dipping fabrics attributed to D1, with only minimal effects of superposed D2 strain.
Surficial geology, Blanchfield Lake, Baffin Island, Nunavut
Authors: Dredge L A
Published: November 2010

This map is part of a series depicting the surficial geology of Central Baffin Island. The mapping of Quaternary deposits, measurement of ice flow indicators, interpretation of glacial and post-glacial history, and geochemical sampling of the till in this area
are part of an integrated multi-component mapping project led by Marc St-Onge and supported by the Geological Survey of Canada, the Canada-Nunavut Geoscience Office, and the Polar Continental Shelf Project. Field work related to the surficial geology component was conducted in 2001 and 2002. Field
traverses and air photo interpretation provided information on the nature and distribution of surface materials shown on the map, which was constructed using 1:60 000 scale aerial photographs compiled onto a 1:100 000 scale base.
A GIS dataset of geological features for the Dendale Lake map area (95 C/15), Yukon Territory and Northwest Territories
Authors: Fallas K M
Published: November 2010

The geological map and database are derived from regional mapping in the Dendale Lake (NTS 95C/15) 1:50 000 scale map area, as part of the Geological Survey of Canada's Central Foreland NATMAP project. Geological features represented by attributed points, lines,
and polygons have been compiled into a GIS dataset suitable for stand-alone use, or integration with other data sets. User-defined attributes provide traditional geological map information with greater detail and enhancements such as explicit orientation data, and lithologies.
The Dendale Lake map area is situated at the southern end of the Franklin Mountains in a foothills physiographic setting. The map pattern in the area is dominated by a broad syncline centered over the La Biche River and rising to the east and west into structurally imbricated anticlinal features.
The syncline preserves sedimentary strata of Early Cretaceous age, while the anticlines expose strata of Late Devonian to Permian age. Fold trends in the area vary from southeast through south to southwest, and locally interfere with each other. Foreland and hinterland verging thrust faults
associated with the anticlinal features juxtapose the Devonian and Carboniferous strata. The type section of the Lower Cretaceous Chinkeh Formation is located in the southeast corner of the map area on a tributary to the La Biche River.