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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
Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Sagavanirktok B-1 Quadrangle (640 square km�equivalent to four 7.5 minute quadrangles). This mapping project reinterprets micropaleontologic correlations for 17 Sagavanirktok Quadrangle wells, and reprocesses data from the one publicly-available seismic line. Surface geologic mapping, subsurface-to-surface stratigraphic age control, and seismic framework are required to reliably decipher the complex geology of this key area of the Brooks Range. Outcrops within the Sagavanirktok B-1 Quadrangle are the closest surface expressions of Prudhoe Bay source and reservoir rocks. This study yields critical petroleum-related...
Tags: Arctic National Wildlife Refuge,
Aufeis,
Brooks Range,
C14,
Eolian, All tags...
Fluvial,
Geologic Map,
Geomorphology,
Glacial,
Glacial Drift,
Glacial Geology,
Glacial Processes,
Glaciation,
Glaciers,
Icings,
Moraines,
North Slope Basin,
Shaviovik River,
Silt,
Surficial,
Surficial Geology,
Thaw Lakes,
geoscientificInformation, Fewer tags
The Alaska Division of Geological & Geophysical Surveys (DGGS), in partnership with the U.S. National Cooperative Geologic Mapping Program, mapped approximately 450 mi2 of the Talkeetna Mountains region of central Alaska at 1:50,000 scale over the course of six weeks in 2014. This area contains significant exposures of Late Triassic mafic volcanics and gabbro sills that have been the focus of region-wide exploration for the Strategic and Critical platinum-group elements (PGEs). The area also exposes numerous inactive and possibly active faults which project through the area of proposed hydropower development. The resulting geologic map offers an improved understanding of the geology, structural history, and mineral...
Tags: 40Ar/39Ar,
Aerial Geology,
Aerial Photography,
Alluvial,
Alluvial Deposits, All tags...
Amphibolite Facies Units,
Bedrock Geologic Map,
Bedrock Geology,
Brachiopods,
Cleary Creek,
Colluvial Deposits,
Cordilleran Ice Sheet,
Crinoids,
Esker,
Faulting,
Faults,
Floodplain,
Fluvial,
Fossils,
Geochronology,
Geologic Map,
Geologic Materials,
Geomorphology,
Glacial,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Glacial Geomorphology,
Glacial History,
Glacial Lake,
Glacial Processes,
Glacial Stratigraphy,
Glaciation,
Ice Contact Deposits,
Ice-Contact,
Iron Creek,
Lacustrine,
Lacustrine Sedimentation,
Landslide,
Landslide Deposit,
Outwash,
Outwash Fan,
Paleochannel,
Permafrost and Periglacial,
Remote Sensing,
Rock Glaciers,
Rock-Glacier Deposits,
Rockfall,
STATEMAP Project,
Sand and Gravel,
Slides,
Slope Instability,
Soil Creep,
Stephan Lake,
Surficial,
Surficial Geologic Map,
Surficial Geology,
Talkeetna Mountains,
Talkeetna Mountains Quadrangle,
Talkeetna River,
Till,
geoscientificInformation, Fewer tags
Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Sagavanirktok B-1 Quadrangle (640 square km�equivalent to four 7.5 minute quadrangles). This mapping project reinterprets micropaleontologic correlations for 17 Sagavanirktok Quadrangle wells, and reprocesses data from the one publicly-available seismic line. Surface geologic mapping, subsurface-to-surface stratigraphic age control, and seismic framework are required to reliably decipher the complex geology of this key area of the Brooks Range. Outcrops within the Sagavanirktok B-1 Quadrangle are the closest surface expressions of Prudhoe Bay source and reservoir rocks. This study yields critical petroleum-related...
Tags: Arctic National Wildlife Refuge,
Basins,
Biostratigraphy,
Brooks Range,
Carbonates, All tags...
Clastics,
Coal,
Depositional Environment,
Diagenesis,
Faulting,
Fluvial,
Folding,
Formations,
Fossils,
Geologic,
Glacial Processes,
Marine,
Marine Transgressions,
Measured Stratigraphic Section,
Modal Analysis,
North Slope Basin,
Orogeny,
Paleobotany,
Paleoenvironment,
Paleontology,
Palynology,
Petrography,
Petroleum,
Provenance,
Resource Assessment,
Sandstone,
Sedimentary,
Shale,
Shaviovik River,
Structure,
Surficial,
Tectonics,
Trace Fossils,
Turbidites,
Volcanic Ash,
geoscientificInformation, Fewer tags
This map shows the distribution of unconsolidated deposits and undifferentiated bedrock exposed at the surface in the Sagavanirktok A-3, A-4, B-3, B-4, and portions of the Sagavanirktok A-5 and B-5 quadrangles. Units were mapped by interpretation of stereo pairs of approximately 1:65,000-scale false-color infrared aerial photographs taken in June and August 1978, as well as 2.5 m and 10 m resolution SPOT imagery collected in 2009 and 2010. Fieldwork was completed in 2008.
Tags: Aeolian,
Alaska Pipeline,
Alaska, State of,
Colluvial Deposits,
Colluvium, All tags...
Dalton Highway,
Geologic Map,
Geology,
Geomorphology,
Glacial,
Glacial Drift,
Glacial Geology,
Glacial Geomorphology,
Glacial Processes,
Ivishak River,
Lupine River,
Permafrost,
Permafrost and Periglacial,
Pingos,
Sagavanirktok,
Sagavanirktok Quadrangle,
Sagavanirktok River,
Solifluction,
Surficial Geology,
Thaw Lakes,
Thermokarst,
Toolik River,
geoscientificInformation, Fewer tags
This report provides detailed (1:63,360-scale) mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 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 north of the Tanana A-1 and A-2 Quadrangles. This report includes detailed geologic, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards.
Tags: Aerial Photography,
Aeromagnetic Survey,
Age Dates,
Amphibolite,
Ar-Ar, All tags...
Bibliography,
C14,
CIPW Norms,
Carbonates,
Clastics,
Coal,
Conductivity Survey,
Conodonts,
Electromagnetic Survey,
Faulting,
Faults,
Folding,
Fossils,
Geologic,
Geomorphology,
Geothermometry,
Glacial,
Glacial Processes,
Greenschist,
Igneous Rocks,
Index Minerals,
Isograds,
Isotopes,
K-Ar,
Lode,
Major Oxides,
Metamorphic Grade,
Metamorphic Minerals,
Metamorphism,
Modal Analysis,
Petrography,
Plutonic,
Plutonic Hosted,
Precious Metals,
Reconstructions,
Regional,
Regional Metamorphism,
Resource Assessment,
Rifting,
Sample Location,
Sandstone,
Schist,
Sedimentary,
Shale,
Structure,
Surficial,
Tectonics,
Terranes,
Type Section,
Uplift,
Volcanic,
Yukon River,
geoscientificInformation, Fewer tags
Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Sagavanirktok B-1 Quadrangle (640 square km�equivalent to four 7.5 minute quadrangles). This geologic map was produced by merging a bedrock geologic map and a surficial geologic map of the Eagle A-2 Quadrangle. This mapping project reinterprets micropaleontologic correlations for 17 Sagavanirktok Quadrangle wells, and reprocesses data from the one publicly-available seismic line. Surface geologic mapping, subsurface-to-surface stratigraphic age control, and seismic framework are required to reliably decipher the complex geology of this key area of the Brooks Range. Outcrops within the Sagavanirktok B-1...
Tags: Arctic National Wildlife Refuge,
Aufeis,
Basins,
Biostratigraphy,
Brooks Range, All tags...
C14,
Carbonates,
Clastics,
Coal,
Depositional Analysis,
Diagenesis,
Eolian,
Faulting,
Fluvial,
Folding,
Formations,
Geologic,
Geologic Map,
Geomorphology,
Glacial,
Glacial Geology,
Glacial Processes,
Glaciation,
Glaciers,
Icings,
Marine,
Marine Transgressions,
Measured Stratigraphic Section,
Modal Analysis,
Moraines,
North Slope Basin,
Orogeny,
Paleobotany,
Paleoenvironment,
Paleontology,
Palynology,
Petrography,
Petroleum,
Provenance,
Resource Management,
Sandstone,
Sedimentary,
Shale,
Shaviovik River,
Silt,
Structure,
Surficial,
Surficial Geology,
Tectonics,
Thaw Lakes,
Trace Fossils,
Turbidites,
Volcanic Ash,
geoscientificInformation, Fewer tags
During 2006 and 2007 the Alaska Division of Geological & Geophysical Surveys conducted reconnaissance surficial-geologic mapping in segment 1 of the Alaska Highway corridor, which straddles the Alaska Highway through the Tanana River valley from Delta Junction to the eastern boundary of the Mt. Hayes Quadrangle. Surficial-geologic deposits were initially mapped by interpreting ~1:63,360-scale, false-color infrared aerial photographs taken in August 1980 and field verified in 2006-2007.
Tags: Age Dates,
Alaska Highway Corridor,
Alluvial Deposits,
Alluvial Fan,
Alluvium, All tags...
Big Delta,
Big Delta Quadrangle,
C14,
Colluvial Deposits,
Colluvium,
Delta Junction,
Delta River,
Depositional Environment,
Dot Lake,
Dunes,
Eolian,
Erosion,
Erratics,
Esker,
Faults,
Floodplain,
Floods,
Gasline,
Geologic Hazards,
Geologic Map,
Geologic Materials,
Geomorphology,
Glacial Deposits,
Glacial Drift,
Glacial Geology,
Glacial Hazards,
Glacial Lake,
Glacial Processes,
Gravel,
Ice Contact Deposits,
Jokulhlaups,
Lake George,
Lake Level,
Landslide,
Measured Sections,
Mount Hayes Quadrangle,
Outburst Floods,
Outwash,
Paleoenvironment,
Paleosols,
Paludal,
Peat,
Permafrost,
Proposed Natural Gas Pipeline,
Radiocarbon Dating,
Rock Glaciers,
Sand,
Soil,
Soils,
Surficial,
Surficial Geology,
Talus,
Tanana River,
Terrace,
Thaw Lakes,
Transportation Corridor,
Unconsolidated Deposits,
Water Table, Fewer tags
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