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To estimate the potential of mineral resources in the Bureau of Land Management Central Yukon Planning Area using geographic information systems (GIS) analysis of muliple statewide datasets. The six mineral deposit models are: 1) REE-Th-Y-Nb deposits associated with peralkaline to carbonatitic intrusive rocks, 2) placer and paleoplacer Au, 3) PGE (-Co-Cr-Ni-Ti-V) deposits associated with mafic-to-ultramafic intrusive rocks, 4) carbonate-hosted Cu (-Co-Ag-Ge-Ga) deposits, 5) sandstone U (-V-Cu) deposits, and 6) Sn-W-Mo (-Ta-In-fluorspar) deposits in specialized granites. GIS data layers available for analysis include sediment and rock geochemistry, pan concentrate mineralogy and geochemistry, Alaska Resource Data...
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Because of the potential for reindeer to commingle into caribou herds when the two occupy the same range or when caribou migrate through reindeer range, areas within current caribou herd summer ranges were considered to have low biological potential to support reindeer herding for calving season and summer. Similarly, areas within the current herd annual ranges were considered to have low biological potential to support reindeer herding for late fall, winter, and early spring. Areas of moderate and good quality forage occurred both within and outside of caribou herd ranges for both assessed seasons within the Central Yukon study area but to widely differing extents. The summer ranges of all caribou herds covered...
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This is a first cut at a statewide 1:63,360 coastline. The entire coasline, however, is not 1:63.360; only where data was available as of January 1998. It is a mixture of sources ranging from the Department of Natural Resources, Land Records Information Section hydrography database to the Exxon Valdez Oil Spill Environmentally Sensitive Index coastline (no ESI attributes included) to the US Geologic Survey hydrography to US Forest Service (in Prince William Sound). Where the 1:63,360 data was unavailable the 1:250,000 coastline was used to fill in. This information does not include lakes or streams. All streams are cut off at the mouth with a straight line. It excludes small islands that are difficult to visually...
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The National Hydrography Dataset (NHD) and Watershed Boundary Dataset (WBD) are used to portray surface water on The National Map. The NHD represents the drainage network with features such as rivers, streams, canals, lakes, ponds, coastline, dams, and streamgages. The WBD represents drainage basins as enclosed areas in eight different size categories. Both datasets represent the real world at a nominal scale of 1:24,000-scale, which means that one inch of The National Map data equals 2,000 feet on the ground. To maintain mapping clarity not all water features are represented and those that are use a moderate level of detail. The NHD and WBD are digital vector datasets used by geographic information systems (GIS)....
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Increasing temperatures across the region will cause a lengthening of the growing season and an increase in heat accumulation (measured as summer warmth index) during summer months. These changes could have profound effects on phenology, plant growth, water availability, and species distributions. July temperature isotherms and SWI have been used to help define vegetation distribution and potential for vegetation change across the boreal and arctic biomes. The northern limit of the boreal forest occurs approximately at the 12°C mean July isotherm and a SWI of 35°C mo, and strong linkages have been described between SWI and treeline advance. The southern boundary for the boreal forest occurs at approximately the...
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Elodea (waterweed) is widely recognized as a serious threat to the ecology of freshwater systems – this plant can achieve dense monospecific stands, reduce the flow of water, and alter the chemical composition of the water body, including hyper-eutrophication and oxygen depletion. It is native to North America south of the limit of the former Laurentide ice sheet, south of the southern US-Canada border. This species was first recorded in Alaska in 1982 and in recent years the number of known sites has increased dramatically, especially in those with high use. Historic and future scenarios for elodea climate suitability was based on associations of known locations of Elodea worldwide with 23 climate and topographic...
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The Alaska Exotic Plants Information Clearinghouse (AKEPIC) is a database and mapping application that provide geospatial information for non-native plant species in Alaska and neighboring Canadian Territories. These products are the result of an ongoing cooperation among the U.S. Forest Service, National Park Service, Bureau of Land Management, U.S. Fish and Wildlife Service, Department of Natural Resources Plant Material Center, and Alaska Center for Conservation Science in support of the Alaska Committee for Noxious and Invasive Plants Management (CNIPM) and the Strategic Plan for Noxious and Invasive Plants Management in Alaska. The Alaska Center for Conservation Science administers the mapping application,...
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Rather than using the ARDF to determine future mining activity, which is a work in progress we used additional datasets. Future mines are difficult to predict but we used three datasets to represent future mining activity: Ambler mining belt, Nanushuk coal mine, and USGS mineral potential GIS database (Jones et al. 2015). Jones et al. (2015) documented the potential and certainty of six minerals deposit groups. The mineral resource potential datasets produced by the USGS (Jones et al. 2015) was used in conjunction with access to identify areas with the most likely long-term future mining activity. Mineral resource potential datasets only cover a portion of our study area (63.9% or 252,845 km2) but can still provide...
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Permit or Lease - Mineral Estate includes a variety of permits or leases including Oil and Gas Lease, Shallow Gas Lease, Exploration License, Geothermal Permit or Lease, Mining Lease, Offshore Prospecting Permit or Lease, Coal Prospecting Permit or Lease. This shape file characterizes the geographic representation of land parcels within the State of Alaska contained by the Mineral Estate-Mineral Permit or Lease category. It has been extracted from data sets used to produce the State status plats. This data set includes cases noted on the digital status plats up to one day prior to data extraction. Each feature has an associated attribute record, including a Land Administration System (LAS) file-type and file-number...
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This dataset was developed for the BLM Rapid Ecoregional Assessment for the Central Yukon study area and represents the most recent available annual distribution for the Terrestrial Fine-Filter Conservation Element caribou: Porcupine Herd. The Porcupine Caribou Management Board maintain radio collar and satellite telemetry data for the Porcupine Herd across Alaska, Yukon, and Northwest Territories. Radio collar and satellite telemetry data were not made available to Alaska Center for Conservation Science (ACCS) for the Rapid Ecoregional Assessment (REA). However, collar location data points were used by Griffith et al. (2002) to determine the 1983 to 2001 total annual range for the Porcupine Herd. The total annual...
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Although future roads are included in the long-term LCM, we conducted separate spatial analyses intersecting the future layers with our fish distributions to identify the projects or watersheds with the potential to impact fish species of conservation concern. Four datasets were used to represent future road construction in the study area: preferred routes to Nome, Umiat, and Ambler; and proposed forestry roads. These roads were intersected with the distributions of Dolly Varden. The anadromous Dolly Varden habitat distribution and modeled resident Dolly Varden habitat distribution for the 2060s were combined into a single distribution for this analysis. Road intersections were highest for Dolly Varden because Dolly...
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Caribou typically undergo seasonal migrations between summer calving grounds, mosquito-relief areas and winter foraging sites, with migration distances varying amongst herds. In the CYR study area, the larger, arctic herds, undergo seasonal migrations of distances up to 640 km, with annual movements of some caribou totaling more than 5000 km; while the smaller, more regional herds farther south, tend to undergo much shorter seasonal movements. Wider ranging herds include the Western Arctic, Central Arctic and Porcupine herds. The more localized herds include the Fortymile, Galena, Hodzana Hills, Macomb, Ray Mountains, White Mountains and Wolf Mountain herds. The Western Arctic herd has the largest range and most...
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Caribou typically undergo seasonal migrations between summer calving grounds, mosquito-relief areas and winter foraging sites, with migration distances varying amongst herds. In the CYR study area, the larger, arctic herds, undergo seasonal migrations of distances up to 640 km, with annual movements of some caribou totaling more than 5000 km; while the smaller, more regional herds farther south, tend to undergo much shorter seasonal movements. Wider ranging herds include the Western Arctic, Central Arctic and Porcupine herds. The more localized herds include the Fortymile, Galena, Hodzana Hills, Macomb, Ray Mountains, White Mountains and Wolf Mountain herds. The Western Arctic herd has the largest range and most...
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Large and small connected lakes throughout the CYR study area support a rich biodiversity of aquatic organisms and represent important foraging and breeding habitat for fish, waterfowl, and shorebirds. Additionally, lakes provide important recreational opportunities and food resources for local residents (e.g., subsistence harvest of fish and wildlife). Small and large lakes were identified based on the definition used in Arp and Jones (2009) to differentiate small (less than 0.1 sq km) from medium and large lakes (greater than 0.1 km2). Lake connections, especially for smaller lakes, can vary greatly and change throughout the open-water season, with ephemeral connections commonly occurring during high flows in...
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There are a number of oil and gas basins that lay within the CYR study region. Selawik oil and gas basin is considered an eastern extension of the Kotzebue oil and gas basin. However, much of the Selawik basin is located in the Selawik National Wildlife Refuge making development unlikely. Exploration in the Selawik Basin has been minimal with no wells drilled. The Colville Basin runs along the northwestern edge of the CYR study area but exploration within this area is minimal. Wells and exploration in this basin are outside the CYR study area. Doyon has drilled Nunivak #1 and #2 exploratory wells between 2009 and 2013 in the Nenana Basin and acquired 2-D seismic, gravity, magnetics, and lakebed geochemical surveys...
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To estimate the potential of mineral resources in the Bureau of Land Management Central Yukon Planning Area using geographic information systems (GIS) analysis of muliple statewide datasets. The six mineral deposit models are: 1) REE-Th-Y-Nb deposits associated with peralkaline to carbonatitic intrusive rocks, 2) placer and paleoplacer Au, 3) PGE (-Co-Cr-Ni-Ti-V) deposits associated with mafic-to-ultramafic intrusive rocks, 4) carbonate-hosted Cu (-Co-Ag-Ge-Ga) deposits, 5) sandstone U (-V-Cu) deposits, and 6) Sn-W-Mo (-Ta-In-fluorspar) deposits in specialized granites. GIS data layers available for analysis include sediment and rock geochemistry, pan concentrate mineralogy and geochemistry, Alaska Resource Data...
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Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Human activities and resource development can cause herd disturbance, fragmentation of caribou habitat, and increased hunting access to herd ranges. Human activities may result in increased vigilance, avoidance behaviors, and redistribution of animals. In particular, during calving, cows and calves tend to avoid roads. Road...
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Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Rangifer tarandus have adapted a life cycle that favors nutrient and energy conservation in the winter months. Preferred forage species are highly dependent on season. Nutrient and digestible energy content in plants is linked to growth stage. Seasonal forage preferences of caribou correlate to the plants species, plant parts,...
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Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Because of the potential for reindeer to commingle into caribou herds when the two occupy the same range or when caribou migrate through reindeer range, areas within current caribou herd summer ranges were considered to have low biological potential to support reindeer herding for calving season and summer. Similarly, areas...


map background search result map search result map BLM REA CYR 2013 Rare Earth Elements Mining Potential BLM REA CYR 2013 Total Annual Range of Porcupine Herd BLM REA CYR 2013 Long-term Future (2060s) Mean July Temperature Isotherms BLM REA CYR 2013 Current Known Occurrences of Non-native Plant Species from AKEPIC BLM REA CYR 2013 Distribution of Oil and Gas Permits and Leases in the Central Yukon BLM REA CYR 2013 National Hydrography Dataset Alaska: Flowlines BLM REA CYR 2013 Current Boundary of Herd Summer Ranges BLM REA CYR 2013 Climate Suitability for Elodea Infestation from 2040 to 2059 based on RCP4.5 Emission Scenario BLM REA CYR 2013 Alaska Coastline 1:63,360 Excluding Small Islands BLM REA CYR 2013 Long-term Future Mine Sites BLM REA CYR 2013 Long-term Future (2060) Road Crossings of Dolly Varden Habitat BLM REA CYR 2013 Connected Small Lakes BLM REA CYR 2013 Oil and Gas Basins in the Central Yukon BLM REA CYR 2013 Tin-Tungsten-Molybdenum-Flourspar Mining Potential BLM REA CYR 2013 Material Sales Sites BLM REA CYR 2013 Autumn movements of the Western Arctic Herd during 2012 BLM REA CYR 2013 Spring movements of the Western Arctic Herd during 2010 BLM REA CYR 2013 Current (2015) Landscape Condition in Historic Caribou Summer Ranges BLM REA CYR 2013 Winter Forage Quality for Caribou within the Central Yukon study area BLM REA CYR 2013 Winter forage quality for caribou during late autumn, winter, and early spring outside of herd annual ranges in the Central Yukon study area BLM REA CYR 2013 Distribution of Oil and Gas Permits and Leases in the Central Yukon BLM REA CYR 2013 Long-term Future (2060) Road Crossings of Dolly Varden Habitat BLM REA CYR 2013 Spring movements of the Western Arctic Herd during 2010 BLM REA CYR 2013 Autumn movements of the Western Arctic Herd during 2012 BLM REA CYR 2013 Rare Earth Elements Mining Potential BLM REA CYR 2013 Tin-Tungsten-Molybdenum-Flourspar Mining Potential BLM REA CYR 2013 Long-term Future Mine Sites BLM REA CYR 2013 Total Annual Range of Porcupine Herd BLM REA CYR 2013 Material Sales Sites BLM REA CYR 2013 Current Known Occurrences of Non-native Plant Species from AKEPIC BLM REA CYR 2013 Connected Small Lakes BLM REA CYR 2013 Long-term Future (2060s) Mean July Temperature Isotherms BLM REA CYR 2013 National Hydrography Dataset Alaska: Flowlines BLM REA CYR 2013 Climate Suitability for Elodea Infestation from 2040 to 2059 based on RCP4.5 Emission Scenario BLM REA CYR 2013 Current (2015) Landscape Condition in Historic Caribou Summer Ranges BLM REA CYR 2013 Winter Forage Quality for Caribou within the Central Yukon study area BLM REA CYR 2013 Winter forage quality for caribou during late autumn, winter, and early spring outside of herd annual ranges in the Central Yukon study area BLM REA CYR 2013 Current Boundary of Herd Summer Ranges BLM REA CYR 2013 Oil and Gas Basins in the Central Yukon BLM REA CYR 2013 Alaska Coastline 1:63,360 Excluding Small Islands