Location Data for Petrographic Samples and Isotopic and Age Data from Detrital Zircon Grains from Selected Rock Samples from St. Lawrence Island and the Western Brooks Range, Alaska

This data set contains a list of geologic station localities on St. Lawrence Island, Alaska, from which thin section samples were examined. The data set also contains U-Pb isotopic data and ages of detrital zircon (DZ) from sedimentary rocks collected on St. Lawrence Island and in the western Brooks Range. All St. Lawrence Island samples (DZ and thin sections) were collected by U.S. Geological Survey (USGS) geologists during geologic mapping in the 1970s. DZ samples from the Brooks Range were collected as part of regional geological mapping programs by the USGS and the Alaska Division of Geological and Geophysical Surveys. Detrital zircon grains were obtained from samples of sedimentary rocks to determine depositional age and sediment sources. The data tables accompanying this data release report the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of two isotopes of lead (207Pb and 206Pb) and two isotopes of uranium (235U and 238U), and the age of each grain.

Data e Risorse

Campo Valore
accessLevel public
bureauCode {010:12}
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier USGS:ASC459
metadata_type geospatial
modified 20220429
old-spatial -171.50, 63.10, -158.50, 68.65
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash b81d22fd85d234b20cf2e19e296ce0db7790df86
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-171.50, 63.10], [-171.50, 68.65], [ -158.50, 68.65], [ -158.50, 63.10], [-171.50, 63.10]]]}
theme {geospatial}
Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • alaska
  • amerigeo
  • amerigeoss
  • brooks-range
  • ckan
  • earth-science
  • earth-sciences
  • geo
  • geochronology
  • geoscientificinformation
  • geoss
  • land-records
  • national
  • north-america
  • ongoveyuk-river
  • sedimentary-rocks
  • seknak-river
  • st-lawrence-island
  • stratigraphy
  • tomname-lagoon
  • united-states
  • uranium-lead-analysis
  • usgs-asc459
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 2025-11-22T05:57:54.048898
metadata_modified 2025-11-22T05:57:54.048902
notes This data set contains a list of geologic station localities on St. Lawrence Island, Alaska, from which thin section samples were examined. The data set also contains U-Pb isotopic data and ages of detrital zircon (DZ) from sedimentary rocks collected on St. Lawrence Island and in the western Brooks Range. All St. Lawrence Island samples (DZ and thin sections) were collected by U.S. Geological Survey (USGS) geologists during geologic mapping in the 1970s. DZ samples from the Brooks Range were collected as part of regional geological mapping programs by the USGS and the Alaska Division of Geological and Geophysical Surveys. Detrital zircon grains were obtained from samples of sedimentary rocks to determine depositional age and sediment sources. The data tables accompanying this data release report the isotopic composition of uranium (U) and thorium (Th) measured in each grain, ratios of two isotopes of lead (207Pb and 206Pb) and two isotopes of uranium (235U and 238U), and the age of each grain.
num_resources 2
num_tags 23
title Location Data for Petrographic Samples and Isotopic and Age Data from Detrital Zircon Grains from Selected Rock Samples from St. Lawrence Island and the Western Brooks Range, Alaska