Filters: Tags: metamorphic rocks (X) > partyWithName: Freeman, L.K. (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Alaska Division of Geological & Geophysical Surveys Newberry, R.J. Szumigala, D.J. Werdon, M.B. Athey, J.E. More... Tag Types Theme (8) Place (8) Tag Schemes Alaska Division of Geological & Geophysical Surveys (7) None (1) ISO 19115 Topic Category (8) View Results as: JSON ATOM CSV

Zircon U-Pb age data, Alaska Highway Corridor, Tanacross and Nabesna quadrangles, Alaska Twenty-two igneous and metamorphic rock samples were collected in a 20-km-long swath centered on the Alaska Highway between Tetlin Junction, Alaska, and the Canada border. Igneous and metamorphic rock samples were submitted to the Apatite to Zircon, Inc. laboratory (A2Z), where zircon U-Pb age analysis, using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), was performed by Paul O'Sullivan. The 15 felsic plutonic rock samples and one gabbro sample yield Cretaceous zircon U-Pb weighted-mean ages ranging from 95.7 Ma to 106.2 Ma. Zircons from a metadiorite yield a Triassic weighted-mean age of about 241.9 Ma. Metamorphic zircons from two samples with felsic igneous protoliths yield Mississippian... Tags: Age Dates, Alaska Highway Corridor, Analyses and Sampling, Bedrock, Bedrock Geology, All tags... Detrital Zircon, Geochronology, Geology, Igneous Rocks, Isotopes, Metamorphic Rocks, Nabesna Quadrangle, Tanacross Quadrangle, U-Pb, geoscientificInformation, Fewer tags Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska This data file presents 40Ar/39Ar step-heating geochronology results for a granite sample from the Livengood mining district. The Livengood area is a historically productive placer mining area approximately 80 road miles north of Fairbanks, Alaska. This data is a component of a geologic map and accompanying report that synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. Tags: 40Ar/39Ar, Airborne Geophysical/Geological Mineral Inventory, Bedrock, Bedrock Geology, Cascaden Ridge, All tags... Copper, Eolian, Fossils, Geochemistry, Geochronology, Geologic Map, Gold, Igneous Rocks, Livengood, Livengood Bench, Livengood Quadrangle, Man-Made Deposits, Metamorphic Rocks, Money Knob, Plutonic Rocks, Ranney Hollow, STATEMAP Project, Sedimentary Rocks, Shorty Creek, Silver, Surficial Geology, Tailings, Tolovana Mining District, Tolovana River, geoscientificInformation, Fewer tags Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Tok area, Tanacross A-5, A-6, and parts of adjacent quadrangles, Alaska The Tok project area is adjacent to the Delta mineral belt volcanogenic massive-sulfide (VMS) district, the Peak gold-silver-copper skarn, and structurally controlled gold and antimony mineralization in the Stibnite Creek and White Gold areas. The project area also includes the Noah prospect, an intrusion-related copper prospect. Whereas the Delta mineral belt has been extensively mapped and explored, the detailed mapping does not continue into the 2015 Tok project area. In this area, only reconnaissance mapping has been conducted. The combination of a lack of detailed mapping, the industry interest in the adjacent areas, and the geophysical data findings prompted the Alaska Division of Geological & Geophysical... Tags: Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, Antimony, All tags... Arsenic, Bedrock Geologic Map, Chemistry, Geochemical Data, Geochemical Surveys, Geochemistry, Gold, Gold Prospect, Lab Methods, Major Oxides, Massive Sulfide Deposit, Massive Sulfide Occurrence, Massive Sulfide Prospect, Massive Sulfides, Metallogenesis, Metamorphic, Metamorphic Deposit, Metamorphic Rocks, Metasedimentary Rocks, Metavolcanic rocks, Minor Oxides, Plutonic Hosted, Polymetallic Vein, Porphyry, Skarn, Tanacross Quadrangle, Tok, Trace Elements, Trace Geochemical, Vein Deposit, Volcanogenic Massive Sulfide, geoscientificInformation, Fewer tags Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska This geologic map and report depicts portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles. The Livengood area is a historically productive placer mining area approximately 80 road miles north of Fairbanks, Alaska. This report synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. It expands and updates the Alaska Division of Geological & Geophysical Surveys (DGGS) Preliminary Interpretive Report (PIR) 2004-3 with the addition of new DGGS mapping and drillhole data from ITH, and integrates previously published DGGS surficial... Tags: 40Ar/39Ar, Airborne Geophysical/Geological Mineral Inventory, Bedrock, Bedrock Geology, Cascaden Ridge, All tags... Copper, Eolian, Fossils, Geochemistry, Geochronology, Geologic Map, Gold, Igneous Rocks, Livengood, Livengood Bench, Livengood Quadrangle, Man-Made Deposits, Metamorphic Rocks, Money Knob, Plutonic Rocks, Ranney Hollow, STATEMAP Project, Sedimentary Rocks, Shorty Creek, Silver, Surficial Geology, Tailings, Tolovana Mining District, Tolovana River, geoscientificInformation, Fewer tags Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and streams sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a helicopter-supported geological and geochemical resource assessment project in the Beaver, Bettles, Livengood, and Tanana quadrangles from June 23 through August 5, 2012. The objectives of DGGS's resource assessment are to improve the trace-element geochemical coverage of selected watersheds; to obtain modern, quantitative geochemical analyses; to understand the petrogenesis of the granites; and to better document established mineral occurrences. Stream-sediment, pan-concentrate, and rock sampling were conducted as part of the State's Rare Earth Elements and Strategic Minerals Assessment project, which is... Tags: Aluminum, Antimony, Arsenic, Augen Gneiss, Barium, All tags... Basalt, Base Metals, Batholith, Beaver Quadrangle, Bedrock, Beryllium, Bettles Quadrangle, Bismuth, Bonanza Creek, Cadmium, Calcium, Caribou Mountain, Cerium, Cesium, Chalcopyrite, Chlorite, Chromium, Coal Creek, Cobalt, Copper, Critical Minerals, Dall River, Dalton Highway, Dysprosium, Economic Geology, Erbium, Europium, Exploration, Felsic, Fish Creek, Fleshlanana Creek, Fluorine, Fort Hamlin Hills, Gadolinium, Galena, Gallium, Geochemical Data, Geochemical Surveys, Geochemistry, Geology, Germanium, Gishna Creek, Gneiss, Gobblers Knob, Gold, Granite, Greisen, Hafnium, Halu Creek, Heavy Metals, Holmium, Hornfels, Igneous Rocks, Iron, Ishtalitna Creek, Kanuti Hot Springs, Kanuti Kilolitna River, Kanuti River, Kilo Hot Springs, Koyuk Mining District, Lanthanide Elements, Lanthanum, Livengood Quadrangle, Lode, Lower Ray Hot Springs, Lutetium, Magnesium, Major Oxides, Manganese, McQuesten Creek, Metabasite, Metals, Metamorphic Rocks, Metasedimentary rocks, Metavolcanic rocks, Mineral Assessment, Mineral Deposit, Mineral Localities, Mineral Resources, Minor Oxides, Molybdenum, Monazite, Mount Henry Eakin, Mount Tozi, Neodymium, Nickel, Niobium, No Name Creek, Non-Metals, Palladium, Pan Concentrates, Phosphorus, Placer, Placer Gold, Platinum, Platinum Group Elements, Potassium, Praseodymium, Precious Metals, Promethium, Prospect Creek, Rare Earth Elements, Ray Mountains, Ray River, Ray River Hot Springs, Ree, Resource Assessment, Resources, Rhyolite, Rubidium, Samarium, Scheelite, Schist, Selenium, Silica, Silver, Sithylemenkat Lake, Sodium, Soil Chemistry, Soil Sampling, Sphalerite, Strategic Minerals, Stream Sediments, Strontium, Sulfides, Sulfur, Tanana Quadrangle, Tantalum, Thallium, Thorium, Tin, Titanium, Tokusatatquaten Lake, Torment Creek, Tourmaline, Trace Elements, Trace Geochemical, Trace Metals, Trans-Alaska Pipeline, Tungsten, Upper Ray Hot Springs, Uranium, Vanadium, Volcaniclastics, Ytterbium, Zeunerite, Zinc, Zirconium, geoscientificInformation, Fewer tags Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock samples collected in 2013 in the Ray Mountains area, Bettles A-1 and A-6 quadrangles, Alaska In 2012, the State of Alaska established its Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), to evaluate Alaska's statewide potential for SCM resources. The project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For decades, the Ray Mountains area of west-central Alaska has been explored for its potential mineral resources. To further assess the rare-earth-element (REE) potential of the State-selected and top-filed lands in the Ray Mountains area, mineral-resource geologists at DGGS carried out a helicopter-supported geological and... Tags: Base Metals, Batholith, Bedrock, Bettles Quadrangle, Cerium, All tags... Chlorite, Critical Minerals, Dalton Highway, Dysprosium, Economic Geology, Erbium, Europium, Exploration, Felsic, Fluorine, Fort Hamlin Hills, Gadolinium, Geochemical Data, Geochemical Surveys, Geochemistry, Geology, Gneiss, Greisen, Heavy Metals, Holmium, Hornfels, Igneous Rocks, Iron, Lanthanide Elements, Lanthanum, Lode, Lutetium, Major Oxides, Metals, Metamorphic Rocks, Metavolcanic rocks, Mineral Assessment, Mineral Deposit, Mineral Localities, Mineral Resources, Minor Oxides, Monazite, Neodymium, No Name Creek, Phosphorus, Placer, Praseodymium, Promethium, Rare Earth Elements, Ray Mountains, Ray River, Ree, Resource Assessment, Resources, Rhyolite, Rubidium, Samarium, Sample Location, Scheelite, Schist, Silica, Silver, Strategic Minerals, Strategic and Critical Minerals Assessment Project, Thallium, Thorium, Tin, Titanium, Tourmaline, Trace Elements, Trace Geochemical, Trace Metals, geoscientificInformation, Fewer tags Bedrock geologic map of the Liberty Bell area, Fairbanks A-4 Quadrangle, Bonnifield mining district, Alaska Report of Investigation 2006-2, "Bedrock geologic map of the Liberty Bell area, Fairbanks A-4 Quadrangle, Bonnifield mining district, Alaska," is the bedrock geologic map of an approximately 131-square-mile area surrounding the Liberty Bell Mine. The geology of the Liberty Bell area, located in the northern Alaska Range foothills, comprises Devonian metasedimentary and meta-igneous rocks of the Totatlanika Schist and Keevy Peak formations, Cretaceous and Tertiary igneous rocks, and overlying unconsolidated Tertiary sedimentary rocks of the Usibelli Group and the younger Nenana Gravel. Tags: 40Ar/39Ar, Alaska, State of, Bedrock Geologic Map, Bonnifield Mining District, Coal, All tags... Fairbanks Quadrangle, Geochemical Data, Geochronology, Geology, Igneous Rocks, Jumbo Dome, Liberty Bell Mine, Metamorphic Rocks, Palynology, Petrography, STATEMAP Project, Sedimentary Rocks, Volcanic Rocks, geoscientificInformation, Fewer tags Major-oxide, minor-oxide, and trace-element geochemical data from rocks collected in 2008 in the eastern Bonnifield mining district, Fairbanks and Healy quadrangles, Alaska Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys carried out a geological field survey, including mapping and sampling, in the eastern part of the Bonnifield mining district in the Fairbanks A-1 and A-2, and the Healy D-1 and D-2 quadrangles, Alaska, from June 16 through July 18, 2008. The fieldwork provides basic information critical to building an understanding of Alaska's geology and is part of an integrated program of airborne geophysical surveys followed by geological mapping. Specifically, this work provides geologic context for geophysical surveys conducted in 2006. To represent a typical lithology, igneous or possible meta-igneous samples were collected and analyzed... Tags: Alaska Range, Analyses, Analyses and Sampling, Analytical Lab Results, Analytical Results, All tags... Bedrock, Bedrock Geology, Chemistry, Chute Creek, Dry Creek, Fairbanks Quadrangle, Geochemical Data, Geochemical Surveys, Geochemistry, Geologic, Geology, Healy Quadrangle, Igneous, Igneous Rocks, Kansas Creek, Lab Methods, Metamorphic Rocks, Methods, Mineral Assessment, Mineralogy, Minerals, Red Mountain Creek, Resource Assessment, Resource Information, Resources, Rocks, Rogers Creek, STATEMAP Project, Sample Location, Sheep Creek, geoscientificInformation, Fewer tags