Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska

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

Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska

The mineral-resources group from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a geologic mapping project in the Talkeetna Mountains C-4, C-3, and B-4 quadrangles from July 23 through August 3, 2014. This project is a part of a multi-year project focusing on improving the publicly-available geological and geochemical data and assessing the mineral potential of the less-explored extension of the western Wrangellia terrane. This program of geologic mapping and rock sampling was conducted as part of the U.S. Geological Survey National Cooperative Geologic Mapping Program and the state of Alaska's Strategic Minerals Assessment project, an initiative designed to evaluate Alaska's potential...

Tags: Copper, Geochemical Data, Geochemical Surveys, Gold, Greenstone, All tags... Iron Creek, Major Oxides, Mineral Assessment, Platinum Group Elements, Rare Earth Elements, STATEMAP Project, Silver, Stephan Lake, Strategic and Critical Minerals Assessment Project, Talkeetna Mountains, Talkeetna Mountains Quadrangle, Talkeetna River, Trace Elements, Tsisi Creek, geoscientificInformation, Fewer tags