A5037364721- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Cryospheric studies and observations
- Geological Modeling and Analysis
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Geological and Geochemical Analysis
- Indigenous Studies and Ecology
- Heavy metals in environment
- Pleistocene-Era Hominins and Archaeology
- Soil Geostatistics and Mapping
- Archaeology and Natural History
- Ecology and biodiversity studies
- Mercury impact and mitigation studies
- Geological Formations and Processes Exploration
- Geomagnetism and Paleomagnetism Studies
- Image Processing and 3D Reconstruction
- Paleontology and Stratigraphy of Fossils
- Arctic and Antarctic ice dynamics
- Mineralogy and Gemology Studies
- Landslides and related hazards
- Geochemistry and Elemental Analysis
Geological Survey of Canada
2013-2024
Natural Resources Canada
2015-2024
University of Sheffield
2019
Ice directional indicators were compiled from extensive field mapping and air-photo interpretation in the Keewatin region of central Nunavut. The profusion multi-faceted bedrock outcrops, intersecting striations, superimposed streamlined landforms, stacked till units, particularly beneath former Divide, is interpreted to be result migration main ice divide region, by as much 500 km between ice-flow phases, possibly through Wisconsinan glaciation. This palimpsest glacial landscape reflects...
ABSTRACT Evidence suggesting a reduction of the Laurentide Ice Sheet (LIS) during Marine Isotope Stage 3 (MIS 3) is widespread but boundaries ice sheet and timing minimum extent are still poorly constrained. Radiocarbon dating glacially transported marine mollusks in Rae Isthmus stream till south Repulse Bay, Nunavut, Canada, provides new evidence for MIS deglaciation north‐west part Hudson Bay. Middle Wisconsinan finite 14 C ages varying between 31.7 39.2k BP (∼35.0 43.7k cal a) indicate...
Abstract. We identify and map chains of esker beads (series aligned mounds) up to 15 m high on average ∼ 65 wide in central Nunavut, Canada, from the high-resolution (2 m) ArcticDEM. Based close 1 : association with regularly spaced, sharp-crested ridges interpreted as De Geer moraines, we interpret be quasi-annual ice-marginal deposits formed time-transgressively at mouth subglacial conduits during deglaciation. Esker therefore preserve a record ice-margin retreat hydrology. The...
Abstract Subglacial meltwater landforms found on palaeo‐ice sheet beds allow the properties of drainage to be reconstructed, informing our understanding modern‐day subglacial hydrological processes. In northern Canada and Fennoscandia, are largely organized into continental‐scale networks corridors (SMCs), interpreted as relics systems undergoing variations in input, effective pressure efficiency. We review current state knowledge bedforms (hummocks, ridges, murtoos, ribbed bedforms)...
The regional dispersal patterns of six trace metals (As, Cd, Cu, Hg, Pb, Zn) emitted from the base metal smelter at Flin Flon were examined in surface soils and depth, using an extensive geochemical database for humus underlying till. Humus is enriched those elements smelter, reflect historical record contamination. concentrations decrease with increasing distance stack, until background values are reached, indicating atmospheric fallout plume. Smelter contamination generally restricted to...
The Geological Survey of Canada (GSC) has developed field and lab methods protocols to guide till sample collection, processing, geochemical analysis the matrix, monitoring quality assurance/quality control, archiving procedures for reconnaissance- local-scale surveys. most significant concepts are described in this paper. Continued long-term use these will ultimately allow GSC researchers integrate contrast multiple datasets ensure minimum levels assurance control all data. This set is...
A successful method of mineral exploration in glaciated terrain is the use indicator minerals recovered from carefully selected glacial sediments, and subsequently traced back to their bedrock source. The application methods relies on efficient effective recovery as well correct identification a wide variety minerals. Geological Survey Canada (GSC) has developed protocols for ongoing future research projects achieve highest quality reporting data. Such include field duplicate samples, blank...
A new digital map of glacial geomorphic features and interpreted landsystems was produced for an area covering ~415 000 km 2 in the Keewatin Sector Laurentide Ice Sheet ( LIS ) Nunavut. The integrates information from previous surficial geology maps >14 field stations, is significantly improved by detailed inventory ~152 glacigenic using high‐resolution Arctic DEM data Landsat 8 imagery. From this, we identify coherent patterns landform development (landsystems) between Manitoba border...
Since the 1970s, till geochemical and indicator mineral methods for exploration, provenance studies environmental research in glaciated terrain have been developed, tested refined. This review summarizes these methods, focusing on field laboratory geochemical, boulder surveys. of protocols is intended as a guide exploration industry publicly funded agencies. It sample medium, describes formation glacial dispersal trains, along with collection, processing, matrix geochemistry, analyses,...
The extent and variation of Cu, Hg, Ni, Pb loading in soil profiles (humus, B-horizon, C-horizon) were examined the vicinity four Canadian industrial sources airborne metal particulates located different ecozones geological terrains: Cu smelter at Rouyn-Noranda, Québec; Cu-Zn Flin Flon, Manitoba; Pb–Zn Trail, British Columbia; inactive Pinchi Lake Hg Mine, Columbia. Three major controlling factors on concentrations soils have been assessed: (1) distance from anthropogenic point source, (2)...
Iron oxides are minerals resistant to chemical alteration and mechanical abrasion, which have ferromagnetic properties a range of compositions. These characteristics useful as indicator in exploration, for example using till glaciated terrains. oxide proportions, grain size, composition samples collected near the Sue-Dianne Cu-Au-Ag IOCG deposit Great Bear magmatic zone (Northwest Territories, Canada) Ni-Cu deposits Thompson Nickel Belt (Manitoba, show that subsamples containing c. 100...
Till geochemical datasets from archived samples in west-central Manitoba are interpreted using multivariate data analytical techniques such as principal component analysis and pathfinder element index methods, combined with a spatial representation of the geographic information system (GIS). Results show that carbonate till derived Hudson Bay, expressed by (Ca + Mg)/Na ratio, is found predominantly east Leaf Rapids extends south into Northeastern Kisseynew Domain. A 30- to 70-km-wide zone...
Research Article| August 01, 2001 Uplift-driven expansion delayed by middle Holocene desiccation in Lake Winnipeg, Manitoba, Canada C.F.M. Lewis; Lewis 1Geological Survey of (Atlantic), Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Search for other works this author on: GSW Google Scholar D.L. Forbes; Forbes B.J. Todd; Todd E. Nielsen; Nielsen 2Manitoba Geological Survey, 1395 Ellice Avenue, Manitoba R3G 3P2, L.H. Thorleifson; Thorleifson 3Geological Canada, 601 Booth Street, Ottawa, Ontario K1A...
ABSTRACT An orientation study around the NICO Co-Au-Bi deposit in Great Bear magmatic zone of NW Territories, Canada, was initiated 2007 to establish a practical guide geochemical and mineralogical exploration for iron oxide copper-gold deposits glaciated terrain. Bedrock till samples were collected up-ice, proximal down-ice from mineralization host rocks, characterize their indicator mineral signatures. Results demonstrate that gold grain abundance, size shape, as well magnetite hematite...
Au sud du détroit Dolphin et de l'Union, dans les Territoires Nord-Ouest, des crêtes morainiques hautes 100 m, composées till à gros blocs marquent l'emplacement d'un front glaciaire l'est au nord lac Bluenose. Les principales sont soit massives, composites avec petites secondaires leur sommet. En amont (est) crêtes, formes relief plus fréquentes collines recouvertes dont la hauteur atteint 60 m monticules entre lesquels se trouvent nombreux lacs. Un important glissement terrain cœur moraine...
Recent advances in the characterization of metasomatic iron and alkali-calcic (MIAC) systems with associated iron-oxide apatite (IOA) prospects iron-oxide–copper–gold (IOCG) cobalt deposits Great Bear magmatic zone were used to determine if geochemistry glacial sediments can unveil pathfinder elements indicative mineralization alteration. Analysis variance within bedrock lithogeochemical (n = 707 samples) till geochemical datasets 92 are compared. Results show that Fe, Co, Ni, Cu, As, Mo,...