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This data release is part of a 2016-2019 study on the geology, geochemistry and geochronology of ore systems in the eastern Yukon-Tanana Upland region, Alaska. Whole rock chemistry was conducted on 185 samples, mostly from Au prospects, with lesser samples from porphyry Cu prospects. Geographically, most samples are from gold prospects near the Pogo Au mine and east to Black Mountain in the Big Delta quadrangle. Fewer samples are from prospects in the Eagle and Tanacross Quadrangles. Samples were submitted to the USGS contract laboratory and analyzed for select trace elements and gold. Sixty elements were determined by inductively coupled plasma-optical emission spectroscopy-mass spectroscopy (ICP-OES-MS), sodium...
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The engineering-geologic map is derived electronically, using Geographic Information System (GIS) software, from the surficial-geologic map of the second segment of the proposed natural gas pipeline corridor through the upper Tanana valley, a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway through the upper Tanana River valley from the Robertson River eastward to near Tetlin Junction in the Tanacross Quadrangle (Reger and Hubbard, PIR 2009-6A). Surficial-geologic units were initially identified by interpretation of false-color ~1:65,000-scale infrared aerial photographs taken in July 1978, August 1980, and August 1981 and locally verified by field checking in 2007 and 2008. The map shows the distribution...
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During 2009 the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 3, a 12-mi-wide (19.3-km-wide) corridor that straddles the Alaska Highway through the Northway-Tanacross Lowland and the southern Yukon-Tanana Upland from Tetlin Junction to the Canada border. This work was an extension of permafrost mapping done in Alaska Highway Corridor Segment 1 from Delta Junction to Dot Lake in the Big Delta and Mt. Hayes Quadrangles during 2006-2007 and Alaska Highway Corridor Segment 2 from the Robertson River to Tetlin Junction in the Tanacross Quadrangles during 2008. Primarily, we inferred the extent of permafrost and...
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During 2008-2010, the Alaska Division of Geological & Geophysical Surveys continued a program, begun in 2006, of reconnaissance mapping of surficial geology in the proposed natural-gas pipeline corridor through the upper Tanana River valley, a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway through the upper Tanana River valley from the western boundaries of the Tanacross B-6 and C-6 Quadrangles near the mouth of the Robertson River eastward to the eastern boundaries of the Tanacross A-4 and B-4 Quadrangles near Tetlin Junction. Mapping during 2008-2010 in the Tanacross Quadrangle linked with mapping of surficial geology completed in the Big Delta and Mt. Hayes quadrangles in 2006-2007. Surficial...
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In 2005, the Alaska Division of Geological & Geophysical Surveys initiated a multi-year geologic field study focused on a corridor centered along the Alaska Highway between Delta Junction and the Canada border. The purpose of this project is to provide geologic information relevant to a proposed Alaska-Canada natural gas pipeline and other future development in the corridor. The scope of this project includes identification of active faults and characterization of seismic hazards. During the 2008 field season the active fault studies were focused on the central part of the corridor between Dot Lake and Tetlin Junction. Field studies included helicopter and fixed-wing air reconnaissance augmented by interpretation...
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During 2009, the Alaska Division of Geological & Geophysical Surveys continued a program, begun in 2006, of reconnaissance mapping of surficial geology in the proposed natural-gas pipeline corridor through the upper Tanana River valley. The study area is a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway from the western boundaries of the Tanacross B-3 and A-3 quadrangles near Tetlin Junction eastward to the eastern boundaries of the Nabesna D-1 and C-1 quadrangles along the Canada border. Mapping during 2008-2009 in the Tanacross and Nabesna quadrangles linked with the mapping completed in the Tanacross, Big Delta and Mt. Hayes quadrangles in 2006-2008. Surficial geology was initially mapped in...
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During 2008 the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted reconnaissance interpretive mapping of permafrost in Alaska Highway Corridor Segment 2, a 12-mi-wide (19.3-km-wide) corridor that straddles the Alaska Highway through the upper Tanana River valley from the eastern boundary of the Mt. Hayes Quadrangle to the eastern edge of the Tanacross Quadrangle. This work was an extension of permafrost mapping done in Alaska Highway Corridor Segment 1 from Delta Junction to Dot Lake in the Big Delta and Mt. Hayes Quadrangles during 2006-2007. Primarily, we inferred the extent of permafrost and ice content by interpreting ~1:65,000-scale, false-color infrared aerial photographs taken in July 1978,...


    map background search result map search result map Surficial geology of Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Reconnaissance interpretation of 1978-1983 permafrost, Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Active and potentially active faults in or near the Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska Surficial geology of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska Reconnaissance interpretation of 1978-1981 permafrost, Alaska Highway corridor, Tetlin Junction to Canada border, Alaska USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1950 USGS 1:250000-scale Quadrangle for Tanacross, AK 1950 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1964 USGS 1:250000-scale Quadrangle for Tanacross, AK 1964 USGS 1:250000-scale Quadrangle for Tanacross, AK 1949 USGS 1:250000-scale Quadrangle for Tanacross, AK 1949 Whole rock geochemical data from the eastern part of the Yukon-Tanana Upland region, Alaska, USA Surficial geology of Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Surficial geology of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska Reconnaissance interpretation of 1978-1981 permafrost, Alaska Highway corridor, Tetlin Junction to Canada border, Alaska Reconnaissance interpretation of 1978-1983 permafrost, Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska Active and potentially active faults in or near the Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1950 USGS 1:250000-scale Quadrangle for Tanacross, AK 1950 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1956 USGS 1:250000-scale Quadrangle for Tanacross, AK 1964 USGS 1:250000-scale Quadrangle for Tanacross, AK 1964 USGS 1:250000-scale Quadrangle for Tanacross, AK 1949 USGS 1:250000-scale Quadrangle for Tanacross, AK 1949 Whole rock geochemical data from the eastern part of the Yukon-Tanana Upland region, Alaska, USA