Geologic map of the Tanana A-1 and A-2 quadrangles, central Alaska

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

Geologic map of the Circle mining district, Alaska

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

Interpretive geologic bedrock map of the Tanana B-1 Quadrangle, Central Alaska

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

Geologic map of the Tanana B-1 quadrangle, central Alaska

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