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In the Arctic, permafrost extends up to 500 m below the ground surface, and it is generally just the top metre that thaws in summer. Lakes, rivers, and wetlands on the arctic landscape are normally not connected with groundwater in the same way that they are in temperate regions. When the surface is frozen in winter, only lakes deeper than 2 m and rivers with significant flow retain liquid water. Surface water is largely abundant in summer, when it serves as a breeding ground for fish, birds, and mammals. In winter, many mammals and birds are forced to migrate out of the Arctic. Fish must seek out lakes or rivers deep enough to provide good overwintering habitat. Humans in the Arctic rely on surface water in many...
The Orange Hill property ("Property") is a parcel of eighteen patented mineral claims and one patented mill site encompassing 363.23 acres located at the toe of Nabesna Glacier at a distance of approximately 12 miles by trail from the end of the Nabesna Road. The distinctive orange color of the hill stems from the weathering of a large body of disseminated copper, molybdenum, silver and gold mineralization that forms the bedrock of the property. The Property is owned by Northwest Explorations Joint Venture ("Venture") organized for the purpose of conducting mineral exploration in Alaska. At the time of organization, AJV Corporation contributed to the Venture the Orange Hill Property, consisting of eighteen patented...
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A survey documenting how climate change is perceived, experienced, and responded to in the Canadian mining sector was administered to industry practitioners at the Prospectors & Developers Association of Canada annual meeting. Nine key findings from the survey are discussed: (1) The Canadian mining sector is sensitive to climate-related conditions. (2) Climate change is perceived to be having a negative impact on mining operations. (3) Companies are taking action to manage the current impacts. (4) Cost and uncertainty are commonly identified barriers to adapting to current climate change. (5) Future climate change is expected to have impacts for the industry. (6) Climate change projections are perceived as threats...
The Army Corps of Engineers is beginning an investigation of old petroleum spills and contamination which took place during the operation of the pipeline. The investigation for the presence of dioxin contamination along the route of the former fuel pipeline has been completed, with no residual herbicides or herbicide-related dioxin detected in any of the samples. Other forms of dioxins were below State cleanup levels at all sampling locations.
The Koyukuk Mining District was one of several northern, turn of the century, gold rush regions. Miners focused their efforts in this region on the Middle Fork of the Koyukuk River and on several of its tributaries. Mining in the Koyukuk began in the 1880s and the first rush occurred in 1898. Continued mining throughout the early decades of the 1900s has resulted in an historic mining landscape consisting of structures, equipment, mining shafts, waste rock, trash scatters, and prospect pits. Modern work continues in the region alongside these historic resources. An archaeological survey was completed in 2012 as part of an Abandoned Mine Lands survey undergone with the Bureau of Land Management, Michigan Technological...
First Nations' participation in resource development projects is continuously changing. Some would argue that it is improving the situation for First Nations and their communities, while others would argue that First Nations still lack meaningful decision-making regarding the land on which we live. This thesis focuses on ways in which First Nations, more specifically the Tahltan First Nation, might improve consultation processes with government, industry, as well as internal consultation between leadership and membership. In undertaking this research, I show the Tahltan how a completed First Nation (Heiltsuk Nation) land use plan might raise and address the kinds of issues being discussed in Tahltan communities....
Managing conflicts between bears and humans is vital for human safety and for the conservation of bears. This study investigated black bear ( Ursus americanus ) and grizzly bear (Ursus arctos ) interactions with humans in 18 major communities of the Yukon Territory. I used an information theoretic approach to generate predictive models of the relative potential of bear-human interaction for the 9 conservation officer management regions in the Yukon Territory. I independently modeled interactions for each species according to 2 distinct bear foraging seasons: hypophagia and hyperphagia. Predictive models for both foraging seasons suggest a strong correlation between anthropogenic linear features and black and grizzly...
Assessment of total dissolved solids (TDS) represents an integrated measure of the concentrations of common ions (e.g., sodium, potassium, calcium, magnesium, chloride, sulfate, and bicarbonate) in freshwaters. Toxicity related to these ions is due to the specific combination and concentration of ions and is not predictable from TDS concentrations. Short-term chronic toxicity tests were conducted with larval chironomids and trout (eggs and swim-up fry) to assess their TDS tolerance relative to effluents from two Alaskan mines. Both effluents are characterized by high TDS content but differ with respect to concentrations of specific ions and alkalinity. The toxicity tests were conducted with synthetic effluents formulated...
Mining and processing cost analyses were conducted on basaltic copper, polymetallic vein, and iron skarn deposit types that are found on Athna, Inc. selections in the Wrangell-St. Elias National Park and Preserve. Resources and recoverable metal values (RMV) needed to make these deposits economically viable were modeled. Methods for estimating ore grades and required RMV are presented. Economic modeling for basaltic copper deposits indicated the RMV necessary for a 15% Discounted-Cash-Flow Rate-Of-Return (DCFROR) for an underground mine ranged from $152/st for a 10,209 stpd operation to $224/st for a 1,276 stpd operation. Economic modeling for polymetallic vein deposits indicated the RMV necessary for a 15% DCFROR...
Patterns of compositional zoning are documented in nine grains of magnesiochromite–chromite (Mgc–Chr), 0.3–0.4 mm in size, subhedral or subrounded, recovered from six placer deposits in British Columbia. Their core zones correspond to Mgc or magnesian Chr, mantled by zones of Chr. A rim of Zn-rich chromite (9.1% ZnO) occurs in one grain. In most of these grains, Fe2+ increases and Mg decreases toward the margin. In contrast, an “anomalous” rim, slightly richer in Mg than the core, is developed in one grain, in which an increase in Mg (=2% MgO) is accompanied by a corresponding increase in Fe3+, Al, minor Ti, and by a decrease in Fe2+ and Cr. In the other zoned grains, contrasting trends are documented for Fe3+ and...
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The article discusses the study regarding the role of human-induced climate change on the fire season in Alaska in 2015. Topics discussed include the use of Buildup Index (BUI) to measure fire risk, the mixed precipitation trends, and the relation of wildfire risk with the preindustrial climate. It also mentioned the use of Geophysical Fluid Dynamics Laboratory Climate Model version 3 (GFDL CM3).
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Risk assessment of natural gas transmission pipelines has been increasingly used to assist pipeline operators with the management of pipelines, and to extend the use of these assets, such as operating beyond the original design specifications and lifetime. BG Technology, in collaboration with an international group of gas companies, have developed, a knowledge based hazard and risk assessment package for gas transmission pipelines. PIPESAFE has already been widely used by the companies that supported its development, and allows managers to take informed decisions on what can be complex and emotive problems associated with pipeline operation and routing. This paper describes the methodology and mathematical modeling...
The Army Corps of Engineers is beginning an investigation of old petroleum spills and contamination which took place during the operation of the pipeline. The investigation for the presence of dioxin contamination along the route of the former fuel pipeline has been completed, with no residual herbicides or herbicide-related dioxin detected in any of the samples. Other forms of dioxins were below State cleanup levels at all sampling locations.
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The Koyukuk Mining District was one of several northern, turn of the century, gold rush regions. Miners focused their efforts in this region on the Middle Fork of the Koyukuk River and on several of its tributaries. Mining in the Koyukuk began in the 1880s and the first rush occurred in 1898. Continued mining throughout the early decades of the 1900s has resulted in an historic mining landscape consisting of structures, equipment, mining shafts, waste rock, trash scatters, and prospect pits. Modern work continues in the region alongside these historic resources. An archaeological survey was completed in 2012 as part of an Abandoned Mine Lands survey undergone with the Bureau of Land Management, Michigan Technological...
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Purpose: To present the Final Plans submitted by Imperial Oil Resources Ventures Ltd. (IORVL) documenting the abandonment and removal of thermistors established to investigate soil and ground conditions at borrow sites, stream crossings, and frost heaves as a prelude to the construction of the Mackenzie Gas Project Pipeline in the Sahtu Settlement Area.
map background search result map search result map Technology, transportation, and scale in the Koyukuk Placer Mining District 1890s -- 1930s Exchanging ideas on climate change in the Yukon Perceptions of climate change risks in primary resource use industries: a survey of the Canadian mining sector Type A Land Use Permit Final Plans submitted by Imperial Oil Resources Ventures Ltd. for winter field geotechnical program in the Sahtu Settlement Area — K’asho Got’ine District Implications of Harvest on the Boundaries of Protected Areas for Large Carnivore Viewing Opportunities AN ASSESSMENT OF THE ROLE OF ANTHROPOGENIC CLIMATE CHANGE IN THE ALASKA FIRE SEASON OF 2015 Implications of Harvest on the Boundaries of Protected Areas for Large Carnivore Viewing Opportunities Technology, transportation, and scale in the Koyukuk Placer Mining District 1890s -- 1930s AN ASSESSMENT OF THE ROLE OF ANTHROPOGENIC CLIMATE CHANGE IN THE ALASKA FIRE SEASON OF 2015 Type A Land Use Permit Final Plans submitted by Imperial Oil Resources Ventures Ltd. for winter field geotechnical program in the Sahtu Settlement Area — K’asho Got’ine District Exchanging ideas on climate change in the Yukon Perceptions of climate change risks in primary resource use industries: a survey of the Canadian mining sector