Emeritus
Email:
cdusel@usgs.gov
Office Phone:
650-329-5719
Fax:
650-329-5491
ORCID:
0000-0001-8481-739X
Location
345 Middlefield Road
Mail Stop 901
Menlo Park
, CA
94025
US
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This dataset contains 99 electron microprobe analyses of cassiterite, chalcopyrite, galena, pyrite, sphalerite, and tetrahedrite from seven Sheep Creek drill core samples and one outcrop; and a table that describes the textures, mineralogy, and rock type of 15 thin sections of Sheep Creek drill core and observations from our study and from drill core logging by industry. These data were used to compare this prospect with others in the Bonnifield district. The dataset also contains tables of sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon dates, zircon characteristics (crystal shape, external morphology, internal features, color, aspect ratio, and cathodoluminescence zoning), and 139 U-Th-Pb analyses...
Categories: Data;
Tags: Age determinations,
Alaska,
Bonnifield,
Electron microprobe,
GeoScientificInformation, All tags...
Geochemistry,
Geochronology,
Healy,
Igneous rocks,
Isotopes,
Isotopic analysis,
Metamorphic rocks,
Mineral Resources,
Mineral chemistry,
Radioactive elements,
Radiometric dating,
Sulfide petrography,
U-Pb geochronology,
USGS Science Data Catalog (SDC),
Uranium-lead analysis,
Uranium-thorium analysis, Fewer tags
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This data release contains three tables of U-Pb zircon isotopic data generated from analyses of 40 metaplutonic and metavolcanic rocks from the Yukon-Tanana Upland of western Yukon and east-central Alaska and one sample from southern Yukon. One of the tables also reports U-Pb data for two titanite analyses for one of the samples. U-Pb zircon ages from analyzed samples range from 363.5 ± 3.8 to 253.1 ± 0.7 Ma and were collected from parautochthonous North America and the allochthonous Yukon-Tanana terrane. U-Pb zircon data include 216 individual analyses by ID-TIMS and 35 individual analyses of two samples by LA-ICP-MS. ID-TIMS analyses of titanite give concordant 206Pb-238U ages of 333 and 338 Ma. Two U-Pb tables...
Categories: Data;
Tags: Age determinations,
Alaska,
Big Delta,
Eagle,
Fairbanks, All tags...
Geochemistry,
Geochemistry,
Geochronology,
Geology,
Igneous rocks,
Isotopes,
Isotopic analysis,
Major elements,
Metamorphic rocks,
Minor elements,
Radioactive elements,
Radiometric dating,
Tanacross,
Trace elements,
USGS Science Data Catalog (SDC),
Uranium-lead analysis,
Uranium-thorium analysis,
Whole-rock geochemistry,
Yukon,
geoscientificInformation, Fewer tags
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