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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
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This map is the result of field investigations by DGGS in 1997 and 1998. This geologic map and report supersede the previously released Public Data File 99-24B, Preliminary interpretive bedrock geologic map of the Healy A-6 Quadrangle, southcentral Alaska. The current map has been updated to include mapping of areas adjacent to the Healy A-6 Quadrangle, newly interpreted bedrock units based on newly acquired analytical, paleontologic, and Ar40/Ar39 data. Ages for the rock units were modified. Field investigations were part of a two-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Chulitna region of southcentral Alaska during 1996.
Tags: 40Ar/39Ar,
Alaska, State of,
Ar-Ar,
Bedrock,
Chulitna, All tags...
Geology,
Gold,
Healy Quadrangle,
Major Oxides,
Mining,
Plutons,
STATEMAP Project,
Southcentral Alaska,
geoscientificInformation, Fewer tags
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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 bedrock, 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,
Bibliography, All tags...
Carbonates,
Clastics,
Coal,
Conductivity Survey,
Electromagnetic Survey,
Faulting,
Folding,
Geologic,
Geomorphology,
Geothermometry,
Greenschist,
Hornfels,
Igneous Rocks,
Index Minerals,
Isograds,
Isotopes,
K-Ar,
Lode,
Magnetic Susceptibility,
Metamorphic Grade,
Metamorphic Minerals,
Metamorphism,
Petrography,
Plutonic,
Plutonic Hosted,
Precious Metals,
Regional,
Regional Metamorphism,
Resource Assessment,
Rifting,
Sample Location,
Sandstone,
Schist,
Sedimentary,
Shale,
Structure,
Tectonics,
Terranes,
Uplift,
Volcanic,
Yukon-Tanana Terrane,
geoscientificInformation, Fewer tags
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This preliminary geologic map of the Fairbanks mining district was mapped at 1:63,360 scale. The report describes the geologic setting, structural geology, earthquake potential, economic geology and the description of bedrock units.
Tags: Alaska, State of,
Alluvial Deposits,
Colluvial Deposits,
Eolian,
Fairbanks, All tags...
Fairbanks Creek,
Fairbanks Mining District,
Geology,
Mining,
STATEMAP Project,
geoscientificInformation, Fewer tags
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This bedrock geologic map was produced by using airborne magnetic and electromagnetic surveys, data and notes from several months of fieldwork, geochemical data, and laboratory investigations. These maps are the result of new field investigations in the Eagle A-1 Quadrangle by DGGS in 1999, 2000, and 2001. Field investigations are 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,
Alluvial Deposits,
Colluvial Deposits,
Eagle Quadrangle,
Fortymile Mining District, All tags...
Fortymile River,
Geology,
Glacial Deposits,
Igneous Rocks,
Jack Wade Junction,
Man-Made Deposits,
Metamorphic Rocks,
Mining,
STATEMAP Project,
Steele Creek Dome,
Taylor Highway,
Top of the World Highway,
Unconsolidated Deposits,
geoscientificInformation, Fewer tags
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