bluuebunny/crossref_metadata_2025 huggingface dataset:
Regional structural and metamorphic geology of the Committee Bay Belt, Laughland Lake area, central mainland, Nunavut
Authors: Sandeman H A , Studnicki-Gizbert C , Brown J , Johnstone S
Published: November 2010

The Committee Bay Belt (NTS 56 K) exhibits northeast-southwest-oriented, variably dipping foliations and shallow lineations that trend east-west near the Amer and Walker Lake shear zones. Supracrustal rocks preserve an early ((?)Archean)
greenschist-amphibolite-grade metamorphic assemblage, overgrown by later ((?)Proterozoic), comparable metamorphic minerals. The earliest deformation phase (D 1 ) is recorded by rare isoclinal folds (F 1 ) of bedding. D 2 generated tight, north- east-southwest-trending, doubly plunging F 2 folds of a
composite S 0 -S 1 foliation. An S 2 transposition foliation developed preferentially in the limbs of kilometre-scale folds, whereas L 2 extension was widespread. D 3 generated warps, with north-northwest axial planes, of the composite S 1 -S 2 fabric and of the Amer and Walker Lake shear zones. D 2
accompanied northwest-southeast shortening, motion along both above-mentioned shear zones, and the generation of a large, sigmoidal feature (about 70 km wide) wherein northeast-trending structures rotate into the bounding east-west-trending shear zones. This deformation was probably
Paleoproterozoic.
Regional three-dimensional stratigraphic modelling of the Oak Ridges Moraine area, southern Ontario
Authors: Logan C , Russell H A J , Sharpe D
R
Published: November 2010

Geological and hydrogeological investigations of the Oak Ridges Moraine and Greater Toronto Area have been used to develop a regional stratigraphic framework. This framework is used to develop a data-driven stratigraphic model by integrating new field data
with archival data in a relational database. A multistep approach is used that involves i) manual stratigraphic interpretation of subsurface data, ii) interpretation and integration of Ministry of Environment water-well data to refine elevation variability, iii) generation of individual
stratigraphic surfaces that integrate geological map boundaries, and iv) generation of semiquantitative confidence maps. The structural ele- vation surfaces can be used to produce sediment-thickness maps and rendered three-dimensional volumes, and to constrain hydrogeological modelling.
Municipalities, conservation authorities, and other agencies can use this stratigraphic model to provide a regional context and to improve the hydrogeological understanding of site-specific investigations.
Use of high-resolution shear-wave-reflection methods for determining earthquake fundamental site period response near Alfred, Ontario
Authors: Benjumea B , Hunter J A , Burns R A , Good R
L , Pullan S E
Published: November 2010

Fundamental site resonance periods due to earthquake shaking have been calculated in a sediment-filled bedrock basin located near Alfred, Ontario, using a high-resolution shear-wave-reflection method. This area is character- ized by postglacial marine (Champlain
Sea) sediments exhibiting surface disturbance that has been postulated to be the result of paleo-earthquake activity ca. 7060 BP. Hence, the study of parameters that govern the basin response to shaking will aid in understanding deformation within this zone. Shear waves can provide straightfor- ward
estimates of the fundamental site period from nearly vertical reflection travel times. Data have been collected at 21 locations that show wide variations in values of fundamental site periods. The quality of the reflection data strongly depends on near-surface conditions. A refraction study in one
area provided the shear-wave velocities within bedrock and overburden necessary to evaluate the resonance amplification effect.
Pore-size distribution characteristics of Yellowknife mining district rocks, Northwest Territories
Authors: Connell S
Published: November 2010

Previous studies have indicated a distinct difference between the porosity of similar rock types from Con and Giant mines, Yellowknife mining district, Northwest Territories. As a result, a detailed pore-size distribution study was carried out to determine the
reason for the existence of these differences, and to provide information that might be used in interpreting ground and airborne electromagnetic survey data. Results indicate that Giant mine samples generally have higher porosity values which are more evident when comparing similar rock types. High
sulphide content is associated with higher porosities in the intermediate pore-size range (10 50 nm) for some samples. Con mine samples have a higher connecting porosity than storage porosity, whereas Giant mine samples have a considerably higher storage porosity than connecting
porosity.
A comparison of seven methods for analysis of carbon in soils
Authors: Girard I , Klassen R A
Published: November 2010

Comparison of seven analytical protocols used for carbon analysis in soils indicates differences that relate to mineralogy, carbon content, and analytical equipment design and operation. For routine analyses of surficial geological materials containing either
inorganic or organic carbon forms, or both, an appropriate method is based on thermal decomposition and oxidation of the sample with carbon released as carbon dioxide analyzed by infrared spectrometry using a Leco CR-412 instrument. The procedure requires analyses of two sample splits. One split is
subjected to high-temperature (1350° C) combustion to determine its total carbon content. The second split is ini-
tially oxidized at low temperature (500° C) to remove volatile and readily oxidized carbon forms (organic), after which the remaining carbon forms (inorganic) are then determined through high-temperature combustion and carbon dioxide analyses.
Late Cenozoic geology, Ancient Pacific Margin NATMAP Project, report 5: paleoecology and proxy climatic change records, south Klondike placer region, Yukon Territory
Authors: Jackson L E , Froese D G , Telka A M , Westgate J A , Preece S J , Storer J E , Huscroft C A
Published: November 2010

Aproxy record of paleoclimates over the past three million years in west-central Yukon Terri-tory is emerging from numerous studies of fossil pollen, plants, and animals. As a part of the Late Cenozoic geology component of the ongoing Ancient Pacific Margin
NATMAPProject, organic-rich sediments over-lying fluvial gravel have been routinely sampled in the south Klondike placer district to further detail this proxy record. Although several sites yielded rich assemblages of plant and invertebrate and vertebrate re-mains, only the Eddas Bench site along
Thistle Creek yielded a datable record extending to the early Pleisto-cene. At least one Early Pleistocene glacial to interglacial cycle is recorded within it. A multidisciplinary investigation is underway.
Constraints on the age of the Klinkit assemblage east of Teslin Lake, northern British Columbia
Authors: Roots C F , Harms T A , Simard R -L , Orchard M J , Heaman L
Published: November 2010

Volcaniclastic and overlying dark sedimentary rocks of the Klinkit assemblage (NTS 104-O/11) are the youngest of several arc remnants that lie between the Cassiar Platform and Cache Creek terrane in the British Columbia-Yukon border area. New U-Pb
geochronological and micropaleontological data indicate Late Carboniferous (or younger) to Late Triassic age for the assemblage. Limestone at the base of the Klinkit assemblage contains Bashkirian conodonts. Intrusive rocks, more deformed than the Klinkit assemblage, are ca. 340 Ma and ca. 320 Ma. A
tuff, probably correlative with the Klinkit assemblage, yielded an Early Permian (ca. 281 Ma) date. Middle to Late Triassic conodonts were recovered from the argillaceous upper unit. We conclude that Klinkit volcanism, begun in the Late Carboniferous, continued through Permian time and was followed
by Triassic clastic sedimentation. Correlative late Paleozoic volcanic centres and Triassic sedimentary rocks in the pericratonic belt are found in central Yukon and north-central British Columbia.
New bedrock mapping and preliminary U/Pb geochronology in the Walmsley Lake area, southeastern Slave Province, Northwest Territories
Authors: MacLachaln K , Relf C , Cairns S , Renaud J , Mills A
Published: November 2010

Bedrock mapping in the Walmsley Lake area, southeastern Slave Province has resulted in the recognition of four regional deformation events. The first predated peak metamorphism and may be correlative with D 1 deformation in the central Slave Province. The second
overlapped with peak metamorphism, and its timing and nature suggest that D 2 deformation across the southern Slave Province may also be correlative; however, preliminary U/Pb geochronology indicates that the age of metamorphism and D 2 deformation vary across the map area. Metamorphism is younger
in the migmatized rocks, which are characterized by recumbent F 3 folds of the main foliation, and which may typify deeper structural levels. The final phase of deformation involved upright northeast- and northwest-trending cross folding. Overturned stratigraphy and the F 4 fold pattern of the
melt-in isograd, suggest the possibility of kilometre-scale, downward-facing nappes, a geometry that has not previously been reported in the Slave Province.
Structural geology of the Stanley Head region, western Cornwallis Island, Nunavut
Authors: Henrichsen M , Kennedy L
Published: November 2010

The geology of the Stanley Head map area is dominated by a previously unrecognized, shallow-level fold and thrust fault that creates the distinctive topography in this area. Three phases of deformation have been documented in the study area: 1) northeast-verging
fold and thrust faults, 2) folding associated with a north-south compressional event resulting in local refolding of northeast-verging folds, and 3) normal faulting associated with east-west extension. The main structure in the study area is the Stanley Head anticline that is cored by evaporite of
the Bay Fiord Formation. This anticline is characterized by kink-style fold geometry, and has an approximate wavelength of 2 km and a length of 9 km. There are numerous normal and strike-slip faults in the area, which define several fault blocks that collectively offset the Stanley Head anticline.
Calcite veining is pervasive and barite veining is localized throughout the study area.
Late Holocene dune activity in the Duchess dune field, Alberta
Authors: Wolfe S A , Ollerhead J , Huntley D J , Campbell C
Published: November 2010

The geomorphology and stratigraphy of the Duchess dune field, in southeastern Alberta, provides a proxy record of the relationship between late Holocene paleoenvironmental conditions and eolian activity. Optical ages of eolian deposits show activity ca. 4500 to
2900 years ago and ca. 400 to 230 years ago, whereas combined radiocarbon and optical ages from sheet sand and paleosol sequences indicate dune stability ca. 980 to 400 years ago. Episodes of dune activity and stability were contemporaneous with peri-ods of increased aridity and increased moisture
availability, respectively. Unlike the Great Sand Hills of southwestern Saskatchewan, there is no evidence of significant dune activity in the last 200 years, possibly due to the predominance of northwesterly winds providing greater moisture to this area.
Deep electromagnetic imaging of the Bathurst No. 12 deposit, New Brunswick: three-dimensional forward modelling, two-dimensional inversion, and sensitivity tests
Authors: Queralt P , Jones A G , Ledo J
Published: November 2010

A detailed three-dimensional (3-D) numerical electrical resistivity model of the Bathurst No. 12 deposit (New Brunswick) has been constructed using available geological and geophysical informa-tion. This model facilitates studies of the capabilities of
audio-magnetotellurics (AMT) at locating and defining mineral targets at depth, and of methods of optimizing data acquisition. Different conditions were analyzed: presence of overburden, dimensions and positions of the ore body, and varying data sampling. The behaviour of 3-D electromagnetic fields
is compared with ones from a body of infinite length extent (a two-dimensional case). The 3-D and 2-D AMT responses are similar at high frequencies so 2-D model-ling is sufficient; however, at low frequencies only those responses for current flow perpendicular to the body (the Transverse Magnetic
mode in a 2-D case) are reasonably alike. The different 2-D inversions car-ried out in this study show that the position and the top of the 3-D ore body are well resolved in contrast to the bottom and the resistivity of the body.
Occurrence of bleached mafic flows and their association with sockwork sulphides and banded iron-formation in the Crestaurum Formation of the late Archean Yellowknife Greenstone Belt, Northwest Territories
Authors: Ootes L , Lentz D R
Published: November 2010

In the northern part of the late Archean Yellowknife Greenstone Belt, tholeiitic basalt of the Crestaurum Formation is bleached along a 7 km strike length. Unbleached late volcanic gabbro dykes and sills transect the bleached mafic flows and constrain the
alteration to synvolcanic processes. Bleaching is likely a result of silicification and Fe leaching with later chloritization of pillow selvages. These altered flows are intercalated with thinly layered, silica-rich, metavolcaniclastic rocks, which have been referred to as 'cherty tuff'.
Petrographic and oxygen isotopic constraints indicate that the chert component is minor. An occurrence of discontinuous chert-magnetite iron-formation and discordant sulphide stockwork are indicative of synvolcanic hydrothermal activity. This hydrothermal activity is likely responsible for local
alteration of the mafic flows, but does not explain the large-scale alteration. Stratigraphic considerations suggest that a hydrothermal alteration system existed within the Crestaurum Formation and preceded eruption of the overlying felsic metavolcanic rocks.
Greenhouse gas sequestration: downhole seismic monitoring of the Weyburn CO2 Monitoring Project, Saskatchewan
Authors: White D J , Bellefleur G , Davis T
L
Published: November 2010

The International Energy Agency Weyburn CO2 Monitoring Project has been established as a test site for evaluating a currently producing oil reservoir for point-source CO2 disposal. Nine-component, three-dimensional vertical seismic profiles will be acquired in
three successive years in an attempt to provide time-lapse images of reservoir evolution during the CO2 flood. The objectives of the downhole
seismic study are to characterize the spatial and temporal variations in the physical properties of the reservoir rocks/fluids and surrounding rocks including 1) bulk rock/fluid properties, 2) fluid state and distribution, 3) rock matrix porosity and directional permeability, and 4) controlling
fault structures.
Grande Rivière de la Baleine, Hudson Bay, Quebec - 1000 years of sedimentation
Authors: Jenner K A , Piper D J W
Published: November 2010

The sedimentology of five box cores and four gravity cores taken within 12 km of the mouth of Grande Rivière de la Baleine is presented with particular focus on the character and thickness of late Holocene sedimentation. Huntec seismic records show that 10
to 30 m of postglacial sediment have been deposited near the river mouth, implying sedimentation rates during the Holocene of 1.3 to 4 mm/a. All available cores sampled the surficial fluviodeltaic facies at the top of the Late Quaternary lithostratigraphic section. Late Holocene sedimentation rates
within this facies are constrained by a new radiocarbon date of 1280 __40 BP. Core sedimentology, grain-size analyses, and X-radiography indicate that the sediments consist of olive-grey mud that has undergone some degree of bioturbation, but that is not burrow homogenized. The cores thus have the
potential to preserve some decade-scale paleoenvironmental information.
Update on bedrock geological mapping of the Yukon-Tanana terrane, southern Stewart River map area, Yukon Territory
Authors: Ryan J J , Gordey S P , Glombick P , Piercey S J , Villeneuve M E
Published: November 2010

The Yukon to mafic composition interdigitates with, and lies structurally (and possibly stratigraphically) above, the metaclastic rocks. Extensive orthogneiss (including augen granite) intrudes both. The orthogneiss and amphibolite formed the subvolcanic root and
volcanic cover, respectively, of a Devono-Mississippian island arc. These rocks served in turn as basement to a Permian magmatic arc, manifested as the Klondike schist and related plutons. A co-magmatic Permian orogeny resulted in extensive transposition and metamorphism of the mid- and late
Paleozoic rocks. The Lucky Joe Cu-Au occurrence, of recent interest in the area, occurs generally within the complex, possibly structurally modified interface between metaclastic and amphibolite successions.
Gold mineralization within the Red Lake mine trend: example from the Cochenour-Willans mine area, Red Lake, Ontario, with new key information from the Red Lake mine and potential analogy with the Timmins camp
Authors: Dubé B , Williamson K , Malo M
Published: November 2010

Detailed mapping of a large stripped outcrop revealed low-grade colloform-crustiform cockade ankerite veins and breccia and ankerite-quartz veins hosted by mafic-ultramafic Balmer assemblage volcanic rocks. Most ankerite veins and breccia are at high angle to
and/or crenulated by S2, suggesting that they are pre- to early-D2 deformation. Gold mineralization is associated with arsenopyrite hosted by
brecciated, more or less silicified ankerite veins and breccia and a high-grade silicified zone. Numerous east-trending 'black line faults' cut all rock types. The Cochenour and Red Lake mines are on the limbs of a F1 fold refolded by F2 folds with associated east-southeast syn-D2 deformation zones.
Local andalusite-rich and carbonate-vein clasts in the Huston conglomerate underground at the Red Lake mine indicate protracted or multistage alteration events with pre- and early-D2 carbonatization and aluminous alteration and some
late carbonatization. A regional unconformity (Huston conglomerate) represents a key empirical exploration target because 94% of the 27.6 M oz Au found in the district is in three deposits adjacent to the unconformity.
Géologie des formations en surface et histoire glaciaire, Cadillac, Québec
Authors: Veillette J J
Published: November 2010

Le feuillet cartographique de Cadillac constitue l'une des dix cartes à l'échelle 1/100 000 de la série des cartes des formations en surface de l'Abitibi québécois. Sous le vocable "Abitibi" sont regroupées six cartes qui
s'étendent au territoire de la municipalité de la Baie-James et quatre qui couvrent la majeure partie de quatre municipalités régionales de comté (MRC) de l'Abitibi. En plus de montrer la répartition des dépôts superficiels, ces cartes indiquent les diverses
directions d'écoulement glaciaire, la limite de submersion glaciolacustre, la répartition des sillons d'icebergs, des dépressions annulaires (anneaux forestiers) et les positions probables de formes profilées enfouies. Dans des blocs occupant la partie supérieure du
feuillet, des cartes thématiques accompagnées de courts textes descriptifs ainsi que de figures et de photos pertinentes abordent de façon succinte l'histoire glaciaire de la région. Les thèmes choisis traitent de la géologie du substratum rocheux et des
propriétés magnétiques de celui-ci pour le feuillet, et des écoulements glaciaires et de leur ordre de succession, du transport glaciaire et de la submersion glaciolacustre pour l'ensemble des dix cartes. La stratigraphie des dépôts quaternaires, illustrée par une
colonne synthétique, montre que ceux-ci ont été mis en place selon une séquence logique et prévisible, qui permet l'application rationnelle des méthodes d'inventaire et de prospection. Des photographies prises sur le terrain complètent la description des
unités cartographiques de la légende et une liste de références présente les travaux jugés les plus pertinents pour le feuillet. En fournissant une vision globale sur l'histoire glaciaire de l'ensemble de la région entourant le feuillet de Lac Matagami, nous
espérons en faciliter la compréhension et mettre en évidence les liens entre les dix cartes de la série. La présentation des grands traits de l'histoire glaciaire et des textes descriptifs a été conçue de façon à atteindre le plus grand nombre
possible d'utilisateurs.
Geology of the Wijinnedi Lake area, Northwest Territories
Authors: Henderson J B
Published: November 2010

The geology of the Wijinnedi Lake area, presented as a 1:50 000-scale map sheet (Map 2023A) in the southwestern Archean Slave Province, is divided into four lithotectonic domains. The three western domains are separated by Archean ductile shear zones. In the
northwest, the structurally highest Wijinnedi domain consists of a 2670 Ma Yellowknife Supergroup felsic volcanic centre, partly mantled by more mafic volcanic rocks that are overlain by a tightly to isoclinally folded, pelite-dominated siltstone and finegrained greywacke turbidite sequence.
Metamorphic grade in the lower pressure facies series ranges from lower greenschist to middle amphibolite, but reaches migmatite grade locally at the east end of the domain. To the south, the Hinscliffe domain consists mainly of a polyphase, largely recrystallized, ca. 2.65 Ga trondhjemite complex
intruded by mafic amphibolite synplutonic dykes. To the southeast, the Ghost domain,
representing mid-crustal structural levels, is dominated by plutonic bodies, with the areally most extensive tonalite and related tonalite gneiss intruded about 2.64 - 2.63 Ga and a group of mainly granite intrusions emplaced at about 2.60 Ga. The less abundant Yellowknife Supergroup pelitic
metasedimentary rocks and intermediate volcanic rocks are represented by migmatite. Most of the domain is at granulite grade with most of the plutonic bodies crystallizing under granulite-grade conditions. The Dauphinee domain in the
eastern part of the area is separated from the high-grade rocks to the west by a Paleoproterozoic cataclastic shear zone; it consists mainly of quartz dioritic to granitic rocks and minor metasedimentary migmatite that are not at granulite grade.
Origin of basinal carbonate laminites of the Mesoproterozoic Society Cliffs Formation (Borden Basin, Nunavut), and implications for base-metal mineralization
Authors: Turner E C
Published: November 2010

Laminated, dark-brown-weathering carbonate rocks from the Society Cliffs Formation in the western part of the Milne Inlet Graben, Borden Basin, are host to the Nanisivik Zn-Pb deposit, but their sedimentology, diagenesis, and stratigraphy are not adequately
understood. Previous interpretations for the origin of planar, millimetric laminae, lacking sedimentary features of shallow-water or peritidal origin, and
of enigmatic, ubiquitous breccia networks, are here negated by field evidence. Laminae are interpreted as particles of water-column carbonate precipitate that accumulated in a deep-water setting, below all important water-column interfaces, and under an anoxic deep-basin water mass. Persistent basin
anoxia and a rift setting are important prerequisites for sedex potential, which may be present in this carbonate part of the Bylot Supergroup.
Pore-size distribution for graphitic shale samples from the Astarte River formation, Piling Group, Baffin Island, Nunavut
Authors: Connell-Madore S , Li J , Dexter K
Published: November 2010

Pore-size distribution analysis was performed on four graphitic shale samples from the Astarte River formation, Baffin Island, Nunavut. This included measurement and interpretation of pore-size distribution data obtained by mercury injection porosimetry. The
purpose was to document the results of the pore-size analysis and to provide pore-structure information on the graphitic shale. These would eventually
be used for electrical mechanism analysis and geophysical survey interpretation. Effective porosity values determined by mercury porosimetry (öHg1 and öHg2) were in the ranges of 3.47 - 14.2%. The storage and connecting porosity values (ös and öc) were in the ranges of 2.72 -
12.8% and 1.03 - 2.29%, respectively. The sulphide-rich samples have the lowest porosity values (3.5 - 4.2%). The samples with higher porosities (sample numbers BAF-1 and BAF-2) have pore-size distribution patterns that resemble those of typical mudstone. The samples with lower porosity
values (BAF-3 and BAF-AB) have more similarities to crystalline rocks.
Geology, Red Lake greenstone belt, western Superior Province, Ontario
Authors: Sanborn-Barrie M , Skulski T , Parker J
Published: November 2010

This 1:50 000 geological map of the Red Lake greenstone belt is a product of the western Superior NATMAP project and represents the first belt-scale geological synthesis of this important gold camp. The map sheet integrates all new and existing mapping,
geochronology (U-Pb zircon and titanite dating) and geochemical information for this greenstone belt. The map face and legend use alphanumeric codes that identify lithologic units according to Mesoarchean and Neoarchean supracrustal assemblages and plutonic suites. Inset figures (5) provide an
overview of the regional framework, compilation sources, assemblages, structural elements and alteration patterns for the belt. An accompanying geochronological summary presents the ages of all major depositional, intrusive and deformational events in the map sheet with UTM coordinates and
references. A companion table of gold deposits within the map sheet identifies current- and past-producing gold mines (ranked according to ounces gold produced), developed prospects and raw prospects and these are keyed numerically to the map face. Also shown on the map are base and precious metal
occurrences.
Dispersal train identification algorithm (DTIA)
Authors: Harris J R , Viljoen D , Bonham-Carter G
F , Brown N
Published: November 2010

A new algorithm for detecting potential dispersal trains in geochemical data sampled from till is presented. This algorithm, referred to as the dispersal train identification algorithm (DTIA), is written in visual basic for applications (VBA) and can be run from
any application that supports VBA. A Microsoft word document is supplied that contains the code and the program can be run from this document. This open file release contains a users manual, a previously published paper describing DTIA (Harris and Bonham-Carter, 2003) and a test dataset for
experimentation purposes.
Ice-movement indicator mapping north of the Keewatin Ice Divide, Meadowbank area, Nunavut
Authors: Utting D J , McMartin I
Published: November 2010

Local-scale mapping of ice-movement indicators in the Meadowbank area, near Baker Lake in Nunavut, resulted from a joint effort by the Canada - Nunavut Geoscience Office and the Geological Survey of Canada. Preliminary results indicate three main phases of
ice-movement. Phase 1 was to the north followed by phase 2 to the north-northwest. A later northward movement (phase 3a) occurred locally, perhaps reflecting convergence towards an esker tunnel and/or a small east-west re-entrant within the ice front near the Meadowbank gold deposits. A late phase
(3b) to the northwest is probably part of a major, late, west-northwesterly movement that can be observed as far as Forde Lake, 100 km south of Baker Lake. The detailed mapping of ice-movement indicators provides a preliminary framework for interpreting glacial dispersal in areas that were located
under the Keewatin Ice Divide across the region.
Mesozoic microfossil assemblages from two wells on Prince Patrick Island, Canadian Arctic Archipelago
Authors: Wall J H
Published: November 2010

Jurassic and Triassic microfaunal assemblages, almost exclusively foraminifera, are identified and dated from two wells drilled on Prince Patrick Island: Elf Jameson Bay C-31 to a depth of 8327 ft. (2538m) in 1971 and BP et al Panarctic Satellite F-68 to a depth
of 12075 ft. (3680m) in 1971-1972. Both wells at the western edge of the Sverdrup Basin were abandoned as dry holes. A correlation chart integrating the microfaunal assemblages with the rock units is provided.
Remote sensing analysis of the Chelsea Landslide
Authors: Alföldi T T
Published: November 2010

PURPOSE OF THIS STUDY: At the request of Mr. J.F. Wallace, Director General of Programs and Operations of the Canada Emergency Measures Organization, the Applications Development Section of the Canada Centre for Remote Sensing has undertaken this study of the
Chelsea Landslide as a part of a larger program of acquainting Canada E.M.O. with Remote Sensing techniques that may be of use in their studies of disasters. This study gives a practical example of using Remote Sensing in a pro-facto examination of
an artificial slope failure. It is not meant as a critique of agencies or individuals involved in the landslide.
Glacial lakes in the Wager Bay area, Kivalliq, Nunavut
Authors: Dredge L A , McMartin I
Published: November 2010

Evidence of several types of glacial lakes is present in the Wager Bay map area. Glacial lakes in the southern half of the map area were small features related to temporary blockage of meltwater by plugs of till or kame. Glacial lakes farther north were more
extensive and ice dammed. The largest was an expansion of Brown Lake, marked by large inflow deltas and a sequence of wave-cut notches, whereas finger lakes with deeply incised spillways developed in upland valleys south of Ford Lake. Lake levels fell as successively lower outlets were exposed by
the receding ice front. The extent and configuration of the northern lakes require an ice front retreating southeast across Brown Lake as far as the west end of Ford Lake; this ice margin must have formed the west side of a late ice divide. The finger lakes formed subsequently on the eastern side of
the ice divide, as a marine calving bay moved west up Wager Bay.
Highlights of recent research in the Bowser and Sustut Basins Project, British Columbia
Authors: Evenchick C E , Ferri F , Mustard P S , McMechan M E , Ritcey D , McNicoll V J , Osadetz K G , O'Sullivan P B , Stasiuk L D , Wilson N S F , Poulton T P , Lowe C , Enkin R
J , Waldron J , Snyder D
B , Turner R J W , Nowlan G , Boddy M
Published: November 2010

New research on energy resource potential of the Bowser and Sustut basins includes fieldwork in the central Bowser Basin, and a suite of energy-resource-related thematic studies. The new data and interpretations of thematic studies provide advances on a number of
fronts. For example, new apatite fission-track thermochronology data are consistent with the regional levels of thermal maturation as defined
by vitrinite-reflectance studies. The latter indicate highly variable thermal maturity. The northern Bowser Basin and western Sustut Basin are in the early oil to condensate-dry gas generation stage of thermal maturation, making these areas the most prospective for petroleum generation and
preservation. New mapping in Bowser Lake area (NTS 104 A) significantly revises the distribution of lithofacies assemblages of theBowser Lake Group strata, and has identified transitions between several units.
Report of activities on the structural geology of southern Peel Plateau and Peel Plain region, Northwest Territories and Yukon
Authors: Lemieux Y , Gal L P , Pyle L J , Hadlari T , Zantvoort W
Published: November 2010

Peel Plateau and Peel Plain have widespread hydrocarbon potential and have been identified by industry stakeholders as a high-priority exploration region, yet the area is underexplored and its geological history remains poorly understood. The Northwest
Territories Geoscience Office and collaborators initiated a multidisciplinary study in 2005, "Regional Geoscience Studies and Petroleum Potential, Peel Plateau and Plain, Northwest Territories and Yukon", the focus of which is to expand geoscience knowledge in the Peel Plateau and Peel Plain. As
part of this project, fieldwork reported here was conducted in 2006 in the southern Peel Plateau and Peel Plain and northern Mackenzie and Franklin mountains. Detailed structural mapping was carried out along major structures, such as the Tabasco, Deadend, and Southbound faults, as well as across
the Imperial anticline.
Pore-size distribution characteristics of Beaufort-Mackenzie Basin shale samples, Northwest Territories
Authors: Connell-Madore S , Katsube T J
Published: November 2010

Pore-size-distribution patterns for forty-one Beaufort-Mackenzie Basin shale samples have been examined for trends and similarities within four shale-compaction zones. These samples were collected over a depth range of 950 to 4860 m in nine wells. The main
purpose of this study was to document trends related to depth and overpressure. This will form a database for pore-structure determination and seal-quality evaluation in future studies.

Results indicate a distinct change in pore-size-distribution patterns at a depth of approximately 2 km in all four zones, with little to no change specifically related to normal versus overpressured areas. The main difference in the pore-size distributions at this depth (2 km) occurs in the
intermediate and micro pore sizes. At a depth of 2 km, the relationship between other parameters (e.g. total porosity, density) and depth also changes.
Geological and geochemical data from the Canadian Arctic Islands. Part I: Stratigraphic tops from Arctic Islands' oil and gas exploration boreholes
Authors: Dewing K , Embry A F
Published: November 2010

The depth to the top of each stratigraphic unit is given for 182 oil and gas wells (or deviated legs) from the Arctic Islands. A total of 3290 picks are given using up-to-date stratigraphic nomenclature. Previously published and unpublished stratigraphic top
picks are also given for each well.
Synthetic magnetotelluric modelling based on the Mallik gas hydrate research wells, Northwest Territories
Authors: Craven J A
Published: November 2010

A synthetic magnetotelluric (MT) study was performed based on the electrical logs from the Mallik gas hydrate research wells. The study looks at the MT apparent resistivity and phases to determine the influence on the response due to the presence of a resistor at
depth that corresponds to the presence of a gas hydrate layer. The purpose of this work is to determine if MT methods would be able to both detect and characterize gas hydrate deposits in the Beaufort-Mackenzie delta. Based on the modelling, MT methods can detect a resistive feature corresponding to
the gas hydrate layer; however, the ability to distinguish the amount of gas hydrate within a layer is reduced by the inability of electromagnetic geophysical techniques to better resolve resistive features.
Report on ice-flow history, deglacial chronology, and surficial geology, Foxe Peninsula, southwest Baffin Island, Nunavut
Authors: Utting D J , Gosse J C , Hodgson D A , Trommelen M
S , Vickers K J , Kelley S
E , Ward B
Published: November 2010

Foxe Peninsula, southwest Baffin Island, is an area with exploration potential for base metals and diamonds, but is lacking in basic geoscience data. In an effort to improve the glacial geological understanding, ice-flow indicators such as striae and erratics
were used to reconstruct five phases of ice flow. These phases record the influences of the Hudson Strait Ice Stream (easterly); Foxe dome, and the Amadjuak and Foxe divides (southerly component); and Amadjuak dome (northwesterly component) on ice flow in the region. Terrestrial cosmogenic nuclide
ages are presented for the Foxe moraine (early to mid-Holocene) and a delta (early Holocene) to the west of Cape Dorset.
Wave dynamics over Roberts Bank, British Columbia: processes and modelling
Authors: Meulé S , Hill P R , Pinazo C
Published: November 2010

Between 1 March and 26 March 2002, a wave and current measurement station was deployed on the upper delta slope of Roberts Bank in approximately 12 m of water. The field data were analyzed and used in a parabolic wave model to determine wave characteristics for
fair-weather, moderate, and storm conditions. The model shows that storm waves act nonuniformly along the beach depending on the local morphology and tidal elevation. Waves propagating during high tide are characterized by smooth dissipation and progressive refraction, whereas waves propagating
during low tide show intense refraction and breaking in front of or over a low-tide bar. Sediment transport divergence in the nearshore is strongly controlled by the temporal relationship between storm waves and tidal height.
Surficial geology, Etset Lake, British Columbia
Authors: Bednarski J M
Published: November 2010

Etset Lake (NTS 94P/11) map area was glaciated by the Laurentide Ice Sheet during the Late Wisconsinan (ca. 25 000-10 000 years ago), which deposited clayey till over most of the area. Glacial flutings in the east central part of the map area record the ice flow
from the north-northeast. Much of the area is now flat and boggy, with peat accumulations of 2 to 3 m that form hummocky terrain underlain by discontinuous permafrost. Till underlies the surface of broad forested uplands. The uplands are usually only a few metres above the surrounding wetlands.
Deglaciation was recorded by numerous small moraines and crevasse-fill ridges that mark the pattern of glacial retreat as the ice sheet thinned and the margin became lobed. A tongue of ice persisted in the broad lowland incised by the modern Petitot River. Meltwater issuing from the retreating ice
margin cut several large channels trending northwest across the map area. The largest of these, now occupied by Sahdoanah Creek, was the main drainage when Petitot River to the north was still covered by ice. These former meltwater channels can have significant, but localized, accumulations of
glaciofluvial gravels.
A guide to the hydrocarbon potential of the northern mainland of Canada
Authors: Dixon J , Morrow D W , MacLean B C
Published: November 2010

The area of study includes the northern Yukon and most of the N.W.T. Within this area five sedimentary geological provinces are identified and their petroleum potential discussed. The five geological provinces are: 1) Interior Platform, 2) Beaufort-Mackenzie
Basin, 3) Northern Yukon Fold Complex, 4) Mackenzie Fold Belt, and 5) Selwyn-Cordillera Fold Belt. While a number of discoveries have been found in four of the five provinces, only the Selwyn-Cordillera Fold Belt has had no discoveries to date. Within each of these provinces potential
reservoirs and source rocks are identified, exploration history outlined, and an indication of petroleum potential discussed.
Géologie des formations en surface et histoire glaciaire, Lebel-sur-Quévillon, Québec
Authors: Paradis S J
Published: November 2010

Le feuillet cartographique de Lebel-sur-Quévillon constitue l'une des dix cartes à l'échelle 1/100 000 de la série des cartes des formations en surface de l'Abitibi québécois. Sous le vocable "Abitibi" sont regroupées six cartes
qui s'étendent au territoire de la municipalité de la Baie-James et quatre qui couvrent la majeure partie de quatre municipalités régionales de comté (MRC) de l'Abitibi. En plus de montrer la répartition des dépôts superficiels, ces cartes indiquent les
diverses directions d'écoulement glaciaire, la limite de submersion glaciolacustre, la répartition des sillons d'icebergs, des dépressions annulaires (anneaux forestiers) et les positions probables de formes profilées enfouies. Dans des blocs occupant la partie supérieure du
feuillet, des cartes thématiques accompagnées de courts textes descriptifs ainsi que de figures et de photos pertinentes abordent de façon succinte l'histoire glaciaire de la région. Les thèmes choisis traitent de la géologie du substratum rocheux et des
propriétés magnétiques de celui-ci pour le feuillet, et des écoulements glaciaires et de leur ordre de succession, du transport glaciaire et de la submersion glaciolacustre pour l'ensemble des dix cartes. La stratigraphie des dépôts quaternaires, illustrée par une
colonne synthétique, montre que ceux-ci ont été mis en place selon une séquence logique et prévisible, qui permet l'application rationnelle des méthodes d'inventaire et de prospection. Des photographies prises sur le terrain complètent la description des
unités cartographiques de la légende et une liste de références présente les travaux jugés les plus pertinents pour le feuillet. En fournissant une vision globale sur l'histoire glaciaire de l'ensemble de la région entourant le feuillet de Lac Matagami, nous
espérons en faciliter la compréhension et mettre en évidence les liens entre les dix cartes de la série. La présentation des grands traits de l'histoire glaciaire et des textes descriptifs a été conçue de façon à atteindre le plus grand nombre
possible d'utilisateurs.
Grain-size distribution and gas permeability of sediment samples from the JPEX/JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well, Northwest Territories
Authors: Connell-Madore S , Katsube T J
Published: November 2010

Grain-size distribution and gas permeability (kG) have been determined for 28 sediment samples from a depth range of 908.05 - 1090.89 m in the JAPEX/JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well in the Mackenzie-Beaufort Basin, Northwest
Territories. The main purpose of this paper is to illustrate the relationship between gas permeability (kG) and grain-size distribution.

Sample grain-size distributions are unimodal tomultimodal and kG values are in the range of 0.12 - 6957mD (x10 - 15 m2). The relationship between kG and the main mode (dm) of the grain-size distributions showsthree distinct trends: kG increases at a high rate (Group A), a moderate rate (Group B),
and a low rate (Group C) with increasing dm. These trends are considered to be closely related to the clay content of the samples.
Rock petrophysical analysis of Upper Devonian Jean Marie gas reservoir rocks in the July Lake area of northeastern British Columbia and in the contiguous area in northwestern Alberta
Authors: Byrnes A P , Wendte J C , Sargent D G
Published: November 2010

This paper provides a summary of the rock petrophysical analysis of the Upper Devonian Jean Marie Member (Redknife Formation) from the July Lake area of northeastern British Columbia and the contiguous area of northwestern Alberta. The database includes 198
one-inch (2.54 cm) diameter core plugs sampled from 18 cores in the July Lake area and 18 one-inch (2.54 cm) diameter core plugs sampled from 5 cores in northwestern Alberta. Overall, the analysis includes data obtained (number of samples shown in parentheses) for porosity (215), grain density
(215), routine air permeability (216), in situ Klinkenberg permeability (216), pore volume compressibility (26), the Archie cementation exponent electrical property (71), effective gas permeability at critical water saturation (40), relative gas permeability at critical water saturation (40),
critical brine saturation (67) and mercury intrusion drainage capillary pressure analysis (40). Key rock petrophysical data is also summarized for the two most significant reservoir facies at July Lake, the platy stromatoporoid-Renalcis reef facies and the detrital stromatoporoid-coral foreslope
facies.
Investigation of geothermal energy resources, Atlantic Provinces
Authors:   John A. Leslie and Associates Limited
Published: November 2010

Data pertinent to the assessment of the geothernal energy resources of the Atlantic Provinces have been compiled and collected. Warm water in sedimentary basins and hot dry rock within Palaeozoic intrusives are considered as potential geothermal resources and,
therefore, constituted the principal study areas. The study has delineated areas with perhaps sorne low-grade geothermal energy potential or, at least, some arcas which require further consideration. Continuing investigations are recommended so that the potential of these areas may be fully
evaluated.
Estimating methane emissions from northern lakes using ice‐bubble surveys
Authors: Walter Anthony Katey M. , Vas Dragos. A. , Brosius Laura , Chapin F. Stuart , Zimov Sergey A. , Zhuang Qianlai
Published: November 2010

The magnitude and variability in methane (CH4) emissions from lakes are uncertain due to limitations in methods for quantifying the patchiness of ebullition (bubbling). We present a field method to estimate an important and highly uncertain source: ebullition from northern lakes. We defined four classes of CH4 bubble clusters trapped in lake ice representing distinct types of biogenic ebullition seeps that differed in flux rate. Mean annual ebullition determined through long‐term (up to 700 d) continuous flux measurements of 31 seeps in three Siberian and one Alaskan lake was (mean ± standard error, 4–10 seeps per class; g CH4 seep−1 y−1): A, 6 ± 4; B, 48 ± 11; C, 354 ± 52; Hotspot, 1167 ± 177. Discrete‐seep ebullition comprised up to 87% of total emissions from Siberian lakes when diffusive flux and background and seep ebullition were considered together. Including seep ebullition increased previous estimates of lake CH4 emissions based on traditional methods 5‐ to 8‐fold for Siberian and Alaskan lakes. Linking new ebullition estimates to an established biogeochemical model, the Terrestrial Ecosystem Model, increased previous estimates of regional terrestrial CH4 emissions 3‐ to 7‐fold in Siberia. Assessment of the method revealed that ebullition seeps are an important component of the terrestrial CH4 budget. They are identifiable by seep type by independent observers; they are consistent predictors of flux rate in both Siberia and Alaska; and they allow quantification of what was previously a large source of uncertainty in upscaling CH4 emissions from lakes to regions.
Application of Solid Phase Adsorption Toxin Tracking (SPATT) for field detection of the hydrophilic phycotoxins domoic acid and saxitoxin in coastal California
Authors: Lane Jenny Q. , Roddam C. Meiling , Langlois Gregg W. , Kudela Raphael M.
Published: November 2010

Recent publications have identified the analysis of phycotoxins in sentinel shellfish as a problematic tool for environmental monitoring purposes. Domoic acid (DA), a neurotoxin produced by some species of the diatom Pseudo‐nitzschia, can remain undetected in sentinel shellfish stocks during toxic blooms and subsequent marine bird and mammal mass mortality events. Solid Phase Adsorption Toxin Tracking (SPATT) has previously been described for monitoring of lipophilic toxins, whereas resin‐based sampling methods are routinely employed for many other environmental contaminants. Here, we evaluate the applicability of SPATT for monitoring the hydrophilic phycotoxin DA and demonstrate that the same field sampling methods can be used for the detection of saxitoxins. We present laboratory‐based adsorption profiles characterizing the performance of SPATT with four resin types: (1) HP20, (2) SP700, (3) SP207, and (4) SP207SS. We present results from 17 mo of approximately weekly SPATT deployments in Monterey Bay, California (USA); this period included two significant toxigenic Pseudo‐nitzschia bloom events as well as low‐level saxitoxin events. SPATT signaled the presence of DA 3 and 7 weeks before the recognition of bloom conditions by traditional monitoring techniques (7 and 8 weeks before shellfish toxicity). Under ambient (non‐bloom) conditions, all resins detected DA when its presence was not apparent from traditional monitoring, highlighting the ubiquity of low level or transient toxin events in the environment. This study is the first to evaluate SPATT deployments in U.S. waters, and the first to demonstrate the applicability of SPATT toward detection of hydrophilic phycotoxins in the field.