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This digital publication, GPR 2008-1, contains geophysical data and a digital elevation model that were produced from airborne geophysical surveys conducted in 2007 for part of the western Fortymile mining district, east-central Alaska. Aeromagnetic and electromagnetic data were acquired for 250 sq miles during the helicopter-based survey. Data provided in GPR 2008-1 include processed (1) linedata ASCII database, (2) gridded files of magnetic data, a calculated vertical magnetic gradient (first vertical derivative), apparent resistivity data, and a digital elevation model, (3) vector files of data contours and flight lines, and (4) the Contractor's descriptive project report. Data are described in more detail in...
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Contours, All tags...
Apparent Resistivity Data,
Apparent Resistivity Map,
DIGHEM V EM System,
Digital Elevation Model,
Eagle Quadrangle,
Electromagnetic Data,
First Vertical Derivative,
Fortymile Mining District,
Geophysics,
HEM Survey,
Magnetic Contours,
Tanacross Quadrangle,
geoscientificInformation, Fewer tags
Project report, interpretation maps, EM anomalies, stacked multi-channel profiles, and other products of the airborne geophysical survey for the Southern Dishna River, Fox Hills, and Beaver Creek survey areas, Iditarod, Ophir, and Holy Cross quadrangles, western Alaska
This digital publication, GPR 2014-3, contains CGG's analysis and interpretation of data produced from airborne geophysical surveys published by DGGS in 2013 (GPR 2013-1) for the Southern Dishna River, Fox Hills, and Beaver Creek survey areas. These three survey areas are informally referred to as the Five Spot survey in places in this publication. CGG's frequency-domain DIGHEM V system was used for the EM data. GPR 2014-3 includes (1) CGG's project report with interpretation and detailed EM Anomalies, and (2) Multi-channel stacked profiles in pdf format. Interpretation maps and EM anomalies are provided in various formats (e.g., Geotiffs, KMZs, and others) and are listed in detail in GPR2014-003 ReadMe (.txt and...
Tags: Aeromagnetic Map,
Aeromagnetic Survey,
Airborne Geophysical Survey,
Alaska, State of,
Aniak Mining District, All tags...
Apparent Resistivity Data,
DIGHEM V EM System,
Electromagnetic Anomalies,
Electromagnetic Data,
Electromagnetic Survey,
Geophysics,
HEM Survey,
Holy Cross Quadrangle,
Iditarod Mining District,
Iditarod Quadrangle,
Innoko Mining District,
Interpretation,
Magnetic Survey,
Magnetics,
Ophir Quadrangle,
geoscientificInformation, Fewer tags
The Preliminary Interpretive Report 2004-3B, "Bedrock geologic map of the Livengood SW C-3 and SE C-4 quadrangles, Tolovana mining district, Alaska," is the bedrock geologic map of an approximately 123-square-mile area in the central Livengood Quadrangle, Alaska.
Tags: 40Ar/39Ar,
Alaska, State of,
Geochemistry,
Geochronology,
Geologic Map, All tags...
Geology,
Igneous Rocks,
K-Ar,
Livengood Bench,
Livengood Dome,
Livengood Mining District,
Livengood Quadrangle,
Metamorphic Rocks,
Money Knob,
Old Smoky Prospect,
Plutonic Rocks,
STATEMAP Project,
Sedimentary Rocks,
Sm-Nd Dates,
Tolovana Mining District,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) mapping of the Tanana A-1 and A-2 quadrangles (500 square miles; equivalent to eight 7.5-minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the south of the Tanana B-1 Quadrangle. This report includes detailed bedrock, surficial, structural, and stratigraphic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the report also includes derivative maps of geologic construction materials and geologic hazards. The Tanana A-1 and A-2 Quadrangles and surrounding area comprise several isolated mountainous ridges in the western Yukon-Tanana Upland...
Tags: 40Ar/39Ar,
Aerial Photography,
Aeromagnetic Map,
Aeromagnetic Survey,
Age Dates, All tags...
Bibliography,
Biostratigraphy,
CIPW Norms,
Carbonates,
Cerium,
Clastics,
Conductivity Survey,
Core Logs,
Cultural Resources,
Depositional Environment,
Diagenesis,
Disseminated,
Economic Geology,
Economic Study,
Electromagnetic Survey,
Epithermal,
Erosion,
Faulting,
Folding,
Fossils,
Geologic Map,
Geomorphology,
Geophysical Map,
Glacial,
Glacial Processes,
Gold,
Greenschist,
Greisen,
Historic Resources,
Hot Springs,
K-Ar,
Lab Methods,
Lode,
Magnetic Susceptibility,
Magnetometer Survey,
Major Oxides,
Manley Basin,
Marine,
Measured Stratigraphic Section,
Metamorphic Grade,
Metamorphism,
Mineralogy,
Mining,
Modal Analysis,
Niobium,
Ores,
Orogeny,
Paleobotany,
Paleocurrent,
Paleoenvironment,
Paleontology,
Palynology,
Petrogenesis,
Petrography,
Petrology,
Placer,
Plutonic,
Plutonic Hosted,
Precious Metals,
Production Data,
Provenance,
Rare Earth Elements,
Reconstructions,
Regional,
Regional Metamorphism,
Remote Sensing,
Resistivity Survey,
Resource Assessment,
Sandstone,
Sedimentary,
Sedimentation,
Shale,
Silver,
Structure,
Structure Map,
Surficial,
Tectonic Map,
Tectonics,
Terranes,
Topographic Map,
Turbidites,
Type Section,
Uplift,
Volcanic,
Volcanic Hosted,
Yukon River,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-2 Quadrangle (270 square miles; equivalent to four 7.5-minute quadrangles). The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates the distribution of a variety of unconsolidated deposits and undifferentiated bedrock in the Eagle A-2 Quadrangle, Fortymile mining district. It was prepared by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken from July 1978 through August 1981 and is locally verified by ground observations during field visits. The results should be considered...
Tags: Alaska, State of,
Chicken,
Eagle Quadrangle,
Fortymile Mining District,
Geology, All tags...
Mining,
STATEMAP Project,
Surficial Geology,
Terrace,
geoscientificInformation, Fewer tags
This surficial-geologic map shows the distribution of unconsolidated deposits and undifferentiated bedrock in the Faith Creek area in the Circle A-4, A-5, B-4, and B-5 quadrangles. This map was prepared principally by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken in 1979 and 1981 and is locally verified by ground observations during field work in 2007.
Tags: Aerial Geology,
Alluvial Deposits,
Alluvial Fan,
Alluvium,
Chatanika River, All tags...
Circle Quadrangle,
Colluvial Deposits,
Colluvium,
Complex Deposits,
Fairbanks Mining District,
Faith Creek,
Fluvial,
Geologic Map,
Geomorphology,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Landslide,
Landslide Deposit,
Man-Made Deposits,
Mining,
Pingos,
Placer,
Sourdough Camp,
Steese Highway,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Terrace,
Till,
geoscientificInformation, Fewer tags
This report provides detailed mapping (1:63,360-scale) in the Dalton Highway area, from Atigun Gorge to Slope Mountain, in the west-central Philip Smith Mountains quadrangle. The map area extends from the northern flank of the Endicott Mountains into the Arctic Foothills province.
Tags: Alaska, State of,
Allochthon,
Alluvial,
Arenite,
Atigun Gorge, All tags...
Atigun River,
Aufeis,
Barite,
Biostratigraphy,
Brooks Range,
Carbonates,
Chert,
Clastics,
Coal,
Colluvial Deposits,
Conglomerate,
Correlation,
Dalton Highway,
Depositional Environment,
Endicott Mountains,
Eolian,
Fan,
Faulting,
Fluvial,
Folding,
Galbraith Lake,
Geologic Map,
Glacial,
Glacial Lake,
Glaciation,
Grainstone,
Graywacke,
Ice-Contact,
Igneous,
Imnavait Mountain,
Itigaknit Mountain,
Itkillik River,
Kettles,
Kuparuk River,
Lacustrine,
Landslide,
Limestone,
Measured Stratigraphic Section,
Mudstone,
Organic Geochemistry,
Orogeny,
Outwash,
Packstone,
Paleocurrent,
Paleontology,
Petroleum,
Philip Smith Mountains Quadrangle,
Porosity,
Provenance,
Reservoir,
Rock-Glacier,
STATEMAP Program,
Sagavanirktok River,
Sandstone,
Shale,
Siderite,
Slope Mountain,
Solifluction,
Stratigraphy,
Structure,
Surficial,
Tectonics,
Terrace,
Toolik Lake,
Toolik River,
Trans-Alaska Pipeline,
Turbidites,
Uplift,
Wackestone,
geoscientificInformation, Fewer tags
This digital publication, GPR 2013-1, contains data produced from airborne geophysical surveys conducted in 2012 for three separate blocks, the Southern Dishna River, Fox Hills, and Beaver Creek survey areas, in the Iditarod, Ophir, and Holy Cross quadrangles in western Alaska. The areas are in the Iditarod, Innoko, and Aniak mining districts. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 1029 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2013-1 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight...
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Aeromagnetic Survey,
Airborne Geophysical Survey,
Alaska, State of, All tags...
Aniak Mining District,
Apparent Resistivity Data,
Apparent Resistivity Map,
DIGHEM V EM System,
Digital Elevation Model,
Electromagnetic Data,
Electromagnetic Survey,
First Vertical Derivative,
Geophysics,
HEM Survey,
Holy Cross Quadrangle,
Iditarod Mining District,
Iditarod Quadrangle,
Innoko Mining District,
Magnetic Survey,
Magnetics,
Ophir Quadrangle,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) surficial-geologic mapping in the Dalton Highway area, from the Sagavanirktok to the Itkillik Rivers, in the west-central Philip Smith Mountains quadrangle. The map area extends from the northern flank of the Endicott Mountains into the Arctic Foothills province.
Tags: Alaska, State of,
Alluvial,
Atigun Gorge,
Atigun River,
Aufeis, All tags...
Avalanche,
Beach Deposits,
Brooks Range,
Colluvial Deposits,
Correlation,
Dalton Highway,
Drainage Patterns,
Dunes,
Endicott Mountains,
Eolian,
Erratics,
Esker,
Fan,
Floodplain,
Fluvial,
Galbraith Lake,
Geologic Map,
Glacial,
Glacial Drift,
Glacial Lake,
Glaciation,
Glaciers,
Gravel,
Ice Contact Deposits,
Imnavait Mountain,
Interglaciation,
Itigaknit Mountain,
Itkillik River,
Kettles,
Kuparuk River,
Lacustrine,
Landslide,
Levees,
Loess,
Moraines,
Outwash,
Paleosols,
Peat,
Permafrost,
Philip Smith Mountains Quadrangle,
Piracy,
Radiocarbon Dating,
Reference Information,
Rock Glaciers,
STATEMAP Project,
Sagavanirktok River,
Sand,
Silt,
Slope Mountain,
Solifluction,
Stratigraphy,
Surficial,
Talus,
Tectonics,
Terrace,
Toolik Lake,
Toolik River,
Trans-Alaska Pipeline,
Tundra,
Vegetation,
geoscientificInformation, Fewer tags
This digital publication, GPR 2008-3, contains data produced from airborne geophysical surveys conducted in 2007 and 2008 for the Styx River Survey area, southcentral Alaska. Aeromagnetic and electromagnetic data were acquired for about 715 sq miles. Data provided in GPR 2008-3 include (1) raw and processed linedata in Geosoft ASCII XYZ files, (2) gridded files of magnetic data, a calculated vertical magnetic gradient (first vertical derivative), apparent resistivity data, and a digital elevation model, (3) flight lines in vector format, and maps of the data in PDF format. Data are described in more detail in the 'gpr2008_003_readme.pdf' and 'Styx-Linedata.txt' files included on the DVD.
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Data, All tags...
Apparent Resistivity Map,
DIGHEM V EM System,
Digital Elevation Model,
Electromagnetic Data,
First Vertical Derivative,
Geophysics,
HEM Survey,
Lime Hills Quadrangle,
McGrath Mining District,
McGrath Quadrangle,
Tyonek Quadrangle,
Yentna Mining District,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-2 Quadrangle (270 square miles; equivalent to four 7.5-minute quadrangles). The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit (for example, stream alluvium) has a definite composition or range of composition. Therefore, the probable presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle....
Tags: Alaska, State of,
Chicken,
Construction Materials,
Eagle Quadrangle,
Engineering, All tags...
Engineering Geology,
Fortymile Mining District,
Geologic Hazards,
Geology,
Mining,
STATEMAP Project,
geoscientificInformation, Fewer tags
This DVD-ROM publication, GPR 2008-4, contains linedata, gridded data, vector data, and browse graphics produced from a fixed-wing aeromagnetic survey conducted in 1997 of the Holitna Basin area, western Alaska. Aeromagnetic data were acquired for about 3234 sq miles for the Alaska Division of Geological & Geophysical Surveys (DGGS) during this fixed-wing survey.
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Aeromagnetic Survey,
Airborne Geophysical Survey,
Alaska, State of, All tags...
Analytic Signal,
Depth Interpretation,
Euler Deconvolution,
Farewell Fault,
First Vertical Derivative,
Fixed Wing Survey,
Geophysics,
Gridded Data,
Holitna Basin,
Horizontal Gradient,
Lime Hills Quadrangle,
Linedata,
McGrath Mining District,
Shaded Relief,
Sleetmute Quadrangle,
Yentna Mining District,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-2 Quadrangle (270 square miles; equivalent to four 7.5-minute quadrangles). The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This geologic map was produced by merging a bedrock geologic map and a surficial geologic map of the Eagle A-2 Quadrangle and based upon results from field investigations by DGGS in 1999 and 2000, which were part of a three-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Fortymile mining district during 1998.
Tags: Alaska, State of,
Augen Gneiss,
Chicken,
Eagle Quadrangle,
Fortymile Mining District, All tags...
Geology,
Mining,
Plutons,
STATEMAP Project,
Terrace,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) mapping of the Tanana A-1 and A-2 quadrangles (500 square miles; equivalent to eight 7.5-minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the south of the Tanana B-1 Quadrangle. This report includes detailed geologic construction materials and geologic hazards data. The Tanana A-1 and A-2 Quadrangles and surrounding area comprise several isolated mountainous ridges in the western Yukon-Tanana Upland of interior Alaska.
Tags: Aerial Photography,
Construction Materials,
Decorative Stone,
Economic Geology,
Engineering Geology, All tags...
Floods,
Ice,
Land Subsidence,
Landslide,
Liquefaction,
Manley Basin,
Manley Hot Springs,
Permafrost,
Resource Assessment,
Sand & Gravel,
Surficial Geology,
Yukon River,
geoscientificInformation, Fewer tags
This digital publication, GPR 2009-1, contains data produced from airborne geophysical surveys conducted in 2008 for the Slate Creek�Slana River survey area in the Chistochina mining district, south-central Alaska. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 442 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2009-1 includes (1) raw and processed linedata; (2) gridded data; (3) vector files of data contours and flight lines; and (4) maps of the data.
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Data, All tags...
Apparent Resistivity Map,
Chistochina Mining District,
DIGHEM V EM System,
Digital Elevation Model,
Electromagnetic Data,
First Vertical Derivative,
Geophysics,
Gulkana Quadrangle,
HEM Survey,
Mount Hayes Quadrangle,
Nabesna Quadrangle,
Slana River,
Slate Creek (Mount Hayes),
geoscientificInformation, Fewer tags
This digital publication, GPR 2011-1, contains data produced from airborne geophysical surveys conducted in 2010 for the Ladue survey area in the Fortymile mining district, Tanacross quadrangle, eastern Alaska. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 742 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2011-1 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight lines.
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Data, All tags...
Apparent Resistivity Map,
DIGHEM V EM System,
Digital Elevation Model,
Electromagnetic Data,
First Vertical Derivative,
Fortymile Mining District,
Geophysics,
HEM Survey,
Tanacross Quadrangle,
geoscientificInformation, Fewer tags
The east side of the northern Alaska Peninsula near Puale Bay and the Iniskin Peninsula of Lower Cook Inlet have long held interest to exploration geologists due to their well developed oil and gas seeps, which spurred on the first active exploration and drilling efforts for petroleum in Alaska. Several oil rushes occurred in the early part of 20th century, primarily in two phases (1902-1905 and 1922-1926) in the area of Puale Bay and Becharof Lake. Unfortunately all of these wells produced only traces of hydrocarbons. Several subsequent deeper wells were drilled in Mesozoic strata of this region and nearby Wide Bay to the south, but like the earlier efforts, did not prove to be economical. Each oil and gas seep...
This digital publication, GPR 2014-2, contains data produced from airborne geophysical surveys conducted in 2012 and 2013 for the Farewell survey area in the McGrath and Yentna mining districts, McGrath and Lime Hills quadrangles, south-central Alaska. Aeromagnetic, electromagnetic (EM), and radiometric data were acquired by helicopter for about 954 sq miles, which includes the 100 sq mile Dalzell Creek area previously released. This publication incorporates data from the previously published Dalzell Creek area into the linedata, grids, maps, and other derivative pieces of this publication. CGG's frequency-domain DIGHEM V system was used for the EM data. GPR 2014-2 includes (1) raw and processed linedata; (2) gridded,...
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Data, All tags...
Apparent Resistivity Map,
DIGHEM V EM System,
Digital Elevation Model,
Electromagnetic Data,
First Vertical Derivative,
Gamma Ray Survey,
Geophysics,
HEM Survey,
Lime Hills Quadrangle,
McGrath Mining District,
Radiometric Survey,
Yentna Mining District,
geoscientificInformation, Fewer tags
This dataset is comprised of a vector topographic dataset illustrating the Dalton Highway area, from Atigun Gorge to Slope Mountain, in the west-central Philip Smith Mountains 1:250,000 quadrangle. The dataset was obtained from the USGS Alaskan 15-minute quadrangle series maps: Phillip Smith Mountains B-4, B-5, C-4, C-5, D-4, and D-5.
Tags: Alaska, State of,
Atigun Gorge,
Atigun River,
Brooks Range,
Dalton Highway, All tags...
Endicott Mountains,
Galbraith Lake,
Imnavait Mountain,
Itigaknit Mountain,
Itkillik River,
Kuparuk River,
Philip Smith Mountains Quadrangle,
STATEMAP Program,
Sagavanirktok River,
Slope Mountain,
Toolik Lake,
Toolik River,
Topographic Map,
geoscientificInformation, Fewer tags
This digital publication, GPR 2011-2, contains data produced from airborne geophysical surveys conducted in 2010 for the Iditarod survey area in the Innoko, Iditarod, and Ophir mining districts, Iditarod and Ophir quadrangles, western Alaska. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 852 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2011-2 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight lines.
Tags: Aeromagnetic Data,
Aeromagnetic Map,
Airborne Geophysical Survey,
Alaska, State of,
Apparent Resistivity Data, All tags...
Apparent Resistivity Map,
DIGHEM V EM System,
Digital Elevation Model,
Electromagnetic Data,
First Vertical Derivative,
Geophysics,
HEM Survey,
Iditarod Mining District,
Iditarod Quadrangle,
Innoko Mining District,
McGrath Mining District,
Ophir Quadrangle,
geoscientificInformation, Fewer tags
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