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This report provides detailed (1:63,360-scale) mapping of portions of U.S. Geological Survey Circle B-2 (1955), B-3 (1955), B-4 (1952), C-2 (1955), C-3 (1955), and C-4 (1952) quadrangles. The area is part of the Circle mining district and adjacent to the Fairbanks mining district. 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: Aereal,
Aerial Photography,
Aeromagnetic Survey,
Age Dates,
Alaska, State of, All tags...
Alluvial Deposits,
Alluvium,
Amphibolite,
Ar-Ar,
Bedrock,
Bibliography,
Birch Creek,
C14,
Carbonates,
Circle Hot Springs,
Circle Mining District,
Circle Quadrangle,
Clastics,
Coal,
Colluvial Deposits,
Colluvium,
Conductivity Survey,
Conodonts,
Crooked Creek,
Electromagnetic Survey,
Fan,
Faulting,
Faults,
Fluvial,
Folding,
Fossils,
Geologic,
Geomorphology,
Glacial,
Glacial Deposits,
Glacial Drift,
Granite,
Hornblende,
Hornfels,
Igneous Rocks,
K-Ar,
Magnetite,
Major Oxides,
Mammoth Creek,
Mastodon Dome,
Metamorphic Grade,
Metamorphic Minerals,
Metamorphism,
Mineralogy,
Modal Analysis,
Petrography,
Plutonic,
Plutonic Hosted,
Porphyry,
Precious Metals,
Quartz,
Regional,
Regional Metamorphism,
Sample Location,
Sandstone,
Schist,
Sedimentary,
Structure,
Surficial,
Tectonics,
Terranes,
geoscientificInformation, Fewer tags
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...
Tags: Active Fault,
Alaska Highway Corridor,
C14,
Dot Lake,
Earthquake, All tags...
Faulting,
Faults,
Gasline,
Geologic Hazards,
Proposed Natural Gas Pipeline,
Robertson River,
Strike-Slip,
Structural Geology,
Structure,
Tanacross,
Tanacross Quadrangle,
Taylor Highway,
Tectonics,
Tetlin,
Thrust,
Tok,
Tok River,
Transportation Corridor,
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
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, structural, and stratigraphic 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: 40Ar/39Ar,
Aerial Photography,
Aeromagnetic Survey,
Age Dates,
Bedrock, All tags...
CIPW Norms,
Cerium,
Conductivity Survey,
Dome,
Economic Geology,
Faults,
Fossils,
Geochemical Surveys,
Geological Process,
Glaciers,
Gold,
Isotopes,
K-Ar,
Major Oxides,
Manley Basin,
Manley Hot Springs,
Modal Analysis,
Niobium,
Permeability,
Petroleum,
Placer,
Production Data,
Resource Assessment,
Rocks,
Silver,
Yukon River,
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
During the 2006 and 2007 field seasons, geologic features indicative of possible youthful surface faulting in or near the Alaska Highway corridor between Delta Junction and Dot Lake were identified by helicopter and fixed-wing air reconnaissance, augmented by interpretation of stereo air photos, remotely sensed images, and aeromagnetic and electromagnetic (EM) datanction to the eastern boundary of the Mt. Hayes Quadrangle. The largest of these faults is the previously unrecognized Dot "T" Johnson fault, a major west-trending, south-dipping thrust fault bordering the northern margin of the Alaska Range along the south side of the Tanana River valley. Two other faults identified as active in this study, the Canteen...
Tags: Alaska Highway Corridor,
Alaska Pipeline,
Big Delta,
Big Delta Quadrangle,
C14, All tags...
Delta Junction,
Delta River,
Dot Lake,
Faulting,
Faults,
Geologic Hazards,
Mount Hayes Quadrangle,
Strike-Slip,
Structural Geology,
Structure,
Tanana River,
Thrust,
Transportation Corridor, Fewer tags
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