A5075022135- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Climate change and permafrost
- Geochemistry and Elemental Analysis
- Heavy metals in environment
- Mine drainage and remediation techniques
- Radioactive element chemistry and processing
- earthquake and tectonic studies
- Metal Extraction and Bioleaching
- Mineralogy and Gemology Studies
- Arsenic contamination and mitigation
- Geological formations and processes
- Extraction and Separation Processes
- Cryospheric studies and observations
- Geological Modeling and Analysis
- Tree-ring climate responses
- Methane Hydrates and Related Phenomena
- High-pressure geophysics and materials
- Paleontology and Stratigraphy of Fossils
- Mercury impact and mitigation studies
- Arctic and Antarctic ice dynamics
- Peatlands and Wetlands Ecology
Government of Northwest Territories
2015-2024
Industry, Tourism and Investment
2016-2023
United States Geological Survey
2023
Geological Survey of Canada
2018-2022
Malmö Municipality
2019
Natural Resources Canada
1992-2016
Nature-based adaptation planning is a challenging endeavor, not least because it requires transdisciplinary approaches to unite different actors' efforts and capacities. However, empirical knowledge on associated governance processes scarce fragmented. Against this background, paper examines the integration of nature-based for climate change into municipalities' daily practices governance. A city-to-city learning lab was established systematically analyze selected urban development projects...
Abstract Scholars and practitioners are increasingly promoting so-called nature-based approaches for urban climate change adaptation. There is widespread consensus that they both support require transdisciplinary approaches, notably by involving citizens in the process finding innovative ways to unite different actors’ efforts capacities. However, there little empirical evidence regarding actual value of citizen involvement sustainability this field. Against background, paper examines...
Climate models project that the northern high latitudes will warm at a rate in excess of global mean. This pose severe problems for Arctic and sub-Arctic infrastructure dependent on maintaining low temperatures structural integrity. is case economically important Tibbitt to Contwoyto Winter Road (TCWR)—the world's busiest heavy haul ice road, spanning 400 km across mostly frozen lakes within Northwest Territories Canada. In this study, future climate scenarios are developed region using...
The estimation of geochemical background is complex in areas impacted by point sources atmospheric emissions due to unknowns about pollutant dispersion, persistence pollutants on the landscape, and natural concentrations elements associated with parent material. This study combined mineralogical analysis conventional statistical geospatial methods separate anthropogenically soils from unimpacted Yellowknife area, Northwest Territories, Canada, a region that was exposed 60 years arsenic...
The internal zonation and chemical evolution of Nb-Ta oxides muscovite have been characterized in the Moose II pegmatite, Northwest Territories, Canada, to distinguish primary magmatic mineralization from that formed during late--stage metasomatic processes.In addition, associated with was examined order assess pegmatite melt nature late-stage fluids.Detailed mapping shows studied body (430 × 61 m) is a highly fractionated, irregularly zoned, spodumene--subtype rare-element dominated by...
Current climate trends are expected to result in the northward expansion of subarctic treeline leading changes vegetation cover and permafrost distribution, as they did during Holocene Climate Optimum when was 150 km north its current position. The impacts these on region’s hydrology still poorly understood. grain-size distributions lake sediments provide an important proxy related spring melt conditions that can be used reconstruct hydroclimatic variability. End-member mixing analysis model...
Abstract Tungsten is a valuable industrial metal with limited effective substitutes for its many uses. classified as critical mineral by countries, including Canada and the United States. As such, tungsten mining expected to increase in future, generating waste potential point sources of leaching environment. Concerns about toxicity have recently emerged, but element not regulated mine waste. The geochemical behavior understudied, hampering ability predict from past, present, future...
We examined late Holocene (ca. 3300 yr BP to present-day) climate variability in the central Northwest Territories (Canadian Subarctic) using a diatom and sedimentological record from Danny's Lake (63.48ºN, 112.54ºW), located 40 km southwest of modern-day treeline. High-resolution sampling paired with robust age model (25 radiocarbon dates) allowed for examination both lake hydroecological conditions (30-year intervals; diatoms) changes watershed (12-year grain size records) over Holocene....
Abstract The highly irregular and localized distribution of tungsten deposits worldwide constitutes a supply challenge for basic industries such as steel carbides. Over Earth's history, has preferentially accumulated at paleocontinental margins formed during the breakup supercontinents. Later crustal thickening these paleogeographic regions magmas they produce are associated with large districts. However, all largest in modern North American Cordillera, which preserves over 3 b.y. geologic...
Arsenic (As) contamination from legacy gold mining in subarctic Canada poses an ongoing threat to lake biota. With climatic warming expected increase As bioavailability waters, developing tools for monitoring variability becomes essential. Arcellinida (testate lobose amoebae) is established group of lacustrine bioindicators that are sensitive changes environmental conditions and ecological health. In this study, As-tolerance sediments (n = 93) Northwest Territories, was investigated....
In order to thoroughly evaluate the genesis of orogenic gold mineralization in context plate tectonics, absolute age data are required link with lithological evolution. We show that pyrite, associated from Con deposit ca. 2700 Ma Yellowknife greenstone belt, has an Re-Os isochron 2591 ± 37 Ma. This is identical previously proposed timing 2592 for S-type pluton-related lode-gold within 2660 graywacke-mudstone turbidites east belt. The pyrite indicate was deposited 60 100 m.y. after formation...
Frame Lake, located within the city of Yellowknife, Northwest Territories, Canada, has been identified as requiring significant remediation due to its steadily declining water quality and inability support fish by 1970s. Former gold mining operations urbanization around lake have suspected probable causes for decline in quality. While these land-use activities are well documented, little information is available regarding their impact on itself. For this reason, Arcellinida, a group shelled...
Research Article| June 07, 2018 Sulfur isotopes of host strata for Howards Pass (Yukon–Northwest Territories) Zn-Pb deposits implicate anaerobic oxidation methane, not basin stagnation Craig A. Johnson; Johnson 1U.S. Geological Survey, P.O. Box 25046, Denver, Colorado 80225, USA Search other works by this author on: GSW Google Scholar John F. Slack; Slack * 2U.S. National Center, MS 954, Reston, Virginia 20192, *Emeritus Julie Dumoulin; Dumoulin 3U.S. Alaska Science Anchorage, 99508, Karen...
The origin of chalcocite is explored through a comparison the copper isotope values this mineral from supergene enrichment, sedimentary copper/red bed, and high-temperature hypogene mineralization around world. Data literature data presented here <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mo stretchy="false">(</mml:mo><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn fontstyle="italic">361</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> reveal that has tightest...