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From June 12-21, 2017, the Alaska Division of Geological & Geophysical Surveys (DGGS) geologists carried out geologic mapping and geochemical sampling in the northeastern Tanacross D-1, and parts of the C-1, and D-2 quadrangles. The project area lies within the Yukon-Tanana Uplands, and encompasses the boundary between Fortymile and Lake George assemblages. It includes porphyry copper-molybdenum-gold deposits and prospects including: Taurus, Fishhook (also known as SW Pika), and Pika Canyon, and is adjacent to the Fortymile Mining District to the north. Highlights of this geochemical report include sampling and characterization of the Pika Canyon, Fishhook, and Taurus prospects. This dataset contains four samples...
Tags: Analyses,
Analyses and Sampling,
Analytical Lab Results,
Analytical Results,
Base Metals, All tags...
Chemistry,
Copper,
Critical Minerals,
Dewey Creek,
Divide Mountain,
Economic Geology,
Economic Study,
Exploration,
Fishhook,
Fortymile Mining District,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geologic,
Geology,
Gold,
Lab Methods,
Lead,
Liberty Creek,
Major Oxides,
Metals,
Methods,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Minerals,
Mining,
Minor Oxides,
Non-Metals,
Ore Deposit,
Ores,
Pika Canyon Prospect,
Porphyry,
Precious Metals,
Prospecting Sites,
Rare Earth Elements,
Ree,
Resource Assessment,
Resource Information,
Resources,
Sample Location,
Silver,
Stream Sediments,
Tanacross Quadrangle,
Taurus Prospect,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
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During the 2017 field season, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted geologic mapping and sampling of part of the Richardson Mining District southeast of Fairbanks, including parts of the Big Delta B-4, B-5, and C-5 quadrangles. The project area is about 30 miles west of the Pogo gold mine and covers the currently active Montecristo and Uncle Sam gold-exploration properties. The goal of DGGS's work in this area is to conduct a mineral-resource assessment and to build an improved understanding of the area's geology and controls on gold mineralization to facilitate industry exploration targeting. This report is based on 17 days of fieldwork completed June 23-July 3,...
Tags: Analyses,
Analyses and Sampling,
Analytical Lab Results,
Analytical Results,
Base Metals, All tags...
Big Delta Quadrangle,
Chemistry,
Critical Minerals,
Economic Geology,
Economic Study,
Exploration,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geologic,
Geology,
Lab Methods,
Major Oxides,
McCoy Creek,
Metals,
Methods,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Minerals,
Mining,
Minor Oxides,
Minton Creek,
Monte Cristo Creek,
Non-Metals,
Ore Deposit,
Ores,
Precious Metals,
Prospecting Sites,
Resource Assessment,
Resource Information,
Resources,
Richardson Mining District,
Sample Location,
Stream Sediments,
Trace Elements,
Trace Geochemical,
Trace Metals,
Uncle Sam prospect,
geoscientificInformation, Fewer tags
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In 2016, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) and University of Alaska Fairbanks carried out a two-part geologic mapping and geochemical sampling project in the Tok River area of the Tanacross A-5 and A-6 quadrangles (June 12-26 and July 8-26). This report provides results of stream-sediment sampling for trace-element geochemistry. An initial suite of sediment samples was collected from streams draining known gold occurrences, including the Stibnite Creek and Noah prospects, and numerous prospects in the White Gold area. These samples were split in half and the two splits were sieved to -200 mesh and -80 mesh, respectively. The splits were then both analyzed to determine...
Tags: Analyses,
Analyses and Sampling,
Analytical Lab Results,
Analytical Results,
Chemistry, All tags...
Dall Prospect,
Eagle Prospect,
Economic Geology,
Exploration,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Geology,
Gold,
Heavy Metals,
Jacqueline Prospect,
Lab Methods,
Metals,
Mineral Assessment,
Mineral Deposit,
Mineral Localities,
Mineral Prospect,
Mineral Resources,
Placer,
Placer Gold,
Precious Metals,
STATEMAP Project,
Shalosky Prospect,
Stream Sediments,
Tanacross Quadrangle,
Tok,
Tok Mining District,
Tok River,
Trace Elements,
Trace Geochemical,
Trace Metals,
geoscientificInformation, Fewer tags
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Geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) and University of Alaska carried out a two-part geologic mapping and geochemical sampling project in the Tok River area of the Tanacross A-5 and A-6 quadrangles (June 12-26 and July 8-26). The Tok River area is adjacent to the Delta mineral belt volcanogenic massive-sulfide (VMS) district, the Peak gold-silver-copper skarn, and the structurally controlled gold and antimony mineralization in the Stibnite Creek and White Gold areas. The Tok River project area includes the Noah (also called Hona) prospect, an intrusion-related copper prospect. The combination of insufficient detailed geologic mapping, historical and current industry interest...
Tags: Analyses,
Analyses and Sampling,
Analytic Signal,
Analytical Lab Results,
Analytical Results, All tags...
Antimony,
Arsenic,
Bedrock,
Chemistry,
Dall Prospect,
Eagle Prospect,
Geochemical Data,
Geochemical Surveys,
Geochemistry,
Gold,
Gold Prospect,
Jacqueline Prospect,
Lab Methods,
Major Oxides,
Massive Sulfide Deposit,
Massive Sulfide Occurrence,
Massive Sulfide Prospect,
Massive Sulfides,
Metallogenesis,
Metals,
Metamorphic Rocks,
Metasedimentary Rocks,
Metavolcanic rocks,
Mineral Assessment,
Mineral Localities,
Mineral Prospect,
Minor Oxides,
Noah Prospect,
Parton Prospect,
Shalosky Prospect,
Tanacross Quadrangle,
Tok,
Tok Mining District,
Tok River,
Trace Elements,
Trace Geochemical,
Volcanogenic Massive Sulfide,
geoscientificInformation, Fewer tags
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This report presents 40Ar/39Ar step-heating geochronology results for igneous and metamorphic rocks from the Alaska Division of Geological & Geophysical Surveys' (DGGS) geologic mapping project in the Tanacross A-5 and A-6 quadrangles and adjoining areas. Our results indicate the Hona granodiorite pluton intruded the area in the Late Cretaceous between 76 and 71 Ma. We determined Cretaceous metamorphic ages from 126 to 121 Ma for hornblende, biotite, sericite and muscovite from multiple samples of upper greenschist to amphibolite grade rocks. This is consistent with regional argon results that imply this area is in the upper plate of the Yukon Tanana Terrane (Hansen and Dusel-Bacon, 1998). Basaltic andesite dikes...
Tags: 40Ar/39Ar,
Amphibolite,
Analyses,
Analyses and Sampling,
Analytical Lab Results, All tags...
Analytical Results,
Basalt,
Bedrock,
Crystals,
Exploration,
Faulting,
Geochronology,
Geologic,
Geology,
Gneiss,
Granite,
Granodiorite,
Greenschist,
Hornblende,
Igneous,
Isotopes,
Metamorphic,
Metamorphic Rocks,
Metamorphism,
Methods,
Mica,
Mineral Composition,
Mineral Prospect,
Mineralogy,
Minerals,
Muscovite,
Noah Prospect,
Plagioclase,
Plutonic,
Rocks,
Sample Location,
Sericite,
Shalosky Prospect,
Tanacross Quadrangle,
Tok,
Tok Mining District,
Tok River,
geoscientificInformation, Fewer tags
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