Filters: partyWithName: Alaska Division of Geological & Geophysical Surveys (X) > partyWithName: Benowitz, J.A. (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 Layer, P.W. Newberry, R.J. State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Tuzzolino, A.L. Wypych, Alicja Tag Types Theme (3) Place (3) Tag Schemes Alaska Division of Geological & Geophysical Surveys (2) None (1) ISO 19115 Topic Category (3) View Results as: JSON ATOM CSV

40Ar/39Ar data, Ray Mountains area, Bettles Quadrangle, Alaska 40Ar/39Ar analyses were performed on igneous rocks from the Ray Mountains area of west-central Alaska. The plutonic samples have ages from about 89 Ma to 109 Ma, while the volcanic samples show ranges from about 30 Ma to 64 Ma. The three volcanic samples fall into two age groups: the younger sample, a basalt, has an age of about 30 Ma, while the two older, rhyolitic samples fall between 58 Ma and 64 Ma. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. Products included in this data release are: a summary of sample collection method; the laboratory report, analytical data tables and associated metadata; and plots of... Tags: 40Ar/39Ar, Age Dates, Analyses, Analyses and Sampling, Analytical Lab Results, All tags... Analytical Results, Ar-Ar, Bedrock, Bedrock Geology, Bettles Quadrangle, Geochronology, Geology, Lab Methods, Mineral Assessment, Mineral Deposit, Mineral Resources, Ray Mountains, Sample Location, Strategic and Critical Minerals Assessment Project, geoscientificInformation, Fewer tags 40AR/39AR Ages from the East Bonnifield geologic map area, Fairbanks A-1, Fairbanks A-2, Healy D-1, and Healy D-2 quadrangles, Alaska 40Ar/39Ar data from plutonic, dike, and alteration samples collected during geologic mapping of the eastern part of the Bonnifield mining district geologic map area in parts of Fairbanks A-1 and Fairbanks A-2 and Healy D-1 and Healy D-2 quadrangles yield results indicating the plutons, dikes, and a gold-bearing quartz vein in the Bonnifield Map area range from 85 to 95 m.y. Tags: 40Ar/39Ar, Age Dates, Alaska Range, Alaska, State of, Buzby prospect, All tags... Chute Creek, Denali Borough, Dry Creek, Dry Creek placer mine, Dry Creek prospect, Fairbanks Quadrangle, Forgotten Creek, Geochronology, Geology, Glacier Creek, Glory Creek, Glory Creek prospect, Healy Quadrangle, Kansas Creek, Kansas Creek prospect, LEA Creek prospect, Newman Creek, Newman Creek placer mine, Red Mountain Creek, Red Mountain Creek prospect, Rogers Creek, STATEMAP Project, Sheep Creek, Slate Creek, Slide Creek, Smog prospect, Snow Mountain Gulch, Threemile Creek, WTF (Western Tundra Flats) prospect, West Fork Little Delta River, Wood River, geoscientificInformation, Fewer tags 40Ar/39Ar ages of rocks collected from the Passage Canal area, Seward D-7 Quadrangle, Alaska This report presents 40Ar/39Ar step-heating geochronology results from a single outcrop of a mineralized near-trench intrusion exposed in a road cut near Whittier, Alaska. The outcrop is the best road-accessible occurrence of a Tertiary near-trench pluton in the region and is commonly visited by field trips, yet no prior geochronological data from this outcrop have been published. Two chronologically distinct intrusive bodies, the Paleogene Sanak-Baranof belt and the Eshamy-suite, are documented in the upper Cook Inlet area. Geochronological analysis of the two samples described in this report confirms that the Whittier road-cut intrusion and veins are coeval (53.0 +/- 0.3 Ma and 50.9 +/- 0.2 Ma, respectively) with... Tags: 40Ar/39Ar, Age Dates, Analyses, Analyses and Sampling, Analytical Lab Results, All tags... Analytical Results, Ar-Ar, Bedrock, Bedrock Geology, Geochronology, Geologic, Geology, Igneous, Igneous Rocks, Isotopes, Lab Methods, Methods, Mineralogy, Rocks, Sample Location, Seward Quadrangle, Volcanic Arc, Volcanic Rocks, Whittier, geoscientificInformation, Fewer tags