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U-Pb Isotopic Data and Ages of Titanite and Detrital Zircon from Selected Rocks from the Western Alaska Range, Alaska

Metadata Updated: October 26, 2023

This data set contains U-Pb isotopic data and associated ages of titanite from one sample and detrital zircon grains from 33 sedimentary and metasedimentary rocks collected from the western Alaska Range in south-central Alaska. The samples were collected as part of geological mapping and research conducted between 2010 and 2014 and funded by the Mineral Resources Program of the U.S. Geological Survey. Titanite was separated by Apatite to Zircon, Inc. (A2Z) and analyzed by USGS research staff at the Stanford-US Geological Survey (USGS) Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at Stanford University. Detrital zircon grains from each of the 33 samples were separated and analyzed by Apatite to Zircon, Inc. (A2Z) and GeoSep Services (GSS) laboratories between 2011 and 2014, using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques described in the supplemental file. The data tables report the concentration of the radioactive elements uranium (U) and thorium (Th) measured in each grain, corrected ratios of two isotopes of lead (207Pb and 206Pb) to two isotopes of uranium (235U and 238U), and the geologic age of each grain calculated from the isotopic ratios. The titanite data table also reports concentrations of selected trace elements measured in each grain.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 26, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 26, 2023
Publisher U.S. Geological Survey
Identifier USGS:ASC272
Data Last Modified 20201125
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id bc540a75-b095-4ff6-91c8-f1a126736911
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -154.36,61.28,-151.45,62.57
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 2384dbd06292449083f961f004e34b903d38ca8f7930e944b65937ba9ae11c8c
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -154.36, 61.28, -154.36, 62.57, -151.45, 62.57, -151.45, 61.28, -154.36, 61.28}

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