U-Pb and 40Ar/39Ar Geochronologic Data for Selected Rocks from the Western Alaska Range, Alaska

This dataset includes four tables with isotopic data and ages for selected igneous bedrock samples collected in 2001 through 2003 from the Western Alaska Range, southcentral Alaska: (1) the concentration of uranium (U) and thorium (Th), ratios of multiple isotopes of lead (Pb) and U, and the age of multiple analytical aliquots, or fractions, of zircon for each sample; (2) the 40Ar/39Ar analytical data and interpreted ages for each rock sample; (3) the sample location, rock characteristics, and interpreted ages for each sample; (4) a data dictionary table, provided as a reference guide for the user.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
datagov_dedupe_retained 20220725164314
identifier USGS:ASC437
metadata_type geospatial
modified 20220218
old-spatial {"type": "Polygon", "coordinates": [[[-152.42, 61.28], [-152.42, 62.01], [ -150.55, 62.01], [ -150.55, 61.28], [-152.42, 61.28]]]}
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash b4b2bfd179c580cf7e972b2c82c49ea1ccdd5862
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-152.42, 61.28], [-152.42, 62.01], [ -150.55, 62.01], [ -150.55, 61.28], [-152.42, 61.28]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • alaska
  • alaska-range
  • amerigeo
  • amerigeoss
  • ckan
  • geo
  • geochronology
  • geology
  • geoscientificinformation
  • geoss
  • igneous-rock-age-determination
  • isotope-ratios
  • isotopic-age
  • isotopic-analysis
  • national
  • north-america
  • potassium-argon-analysis
  • radiometric-dating
  • revelation-mountains
  • tordrillo-mountains
  • united-states
  • uranium-lead-analysis
  • uranium-thorium-analysis
  • usgs-asc437
isopen False
license_id notspecified
license_title License not specified
maintainer U.S. Geological Survey, Alaska Science Center
maintainer_email ascweb@usgs.gov
metadata_created 2025-11-22T03:29:29.979093
metadata_modified 2025-11-22T03:29:29.979097
notes This dataset includes four tables with isotopic data and ages for selected igneous bedrock samples collected in 2001 through 2003 from the Western Alaska Range, southcentral Alaska: (1) the concentration of uranium (U) and thorium (Th), ratios of multiple isotopes of lead (Pb) and U, and the age of multiple analytical aliquots, or fractions, of zircon for each sample; (2) the 40Ar/39Ar analytical data and interpreted ages for each rock sample; (3) the sample location, rock characteristics, and interpreted ages for each sample; (4) a data dictionary table, provided as a reference guide for the user.
num_resources 2
num_tags 24
title U-Pb and 40Ar/39Ar Geochronologic Data for Selected Rocks from the Western Alaska Range, Alaska