Detrital zircon maximum depositional dates for the Jurassic Chinitna and Naknek Formations, lower Cook Inlet, Alaska: A preliminary view

This report and it's accompanying analytical data present uranium-lead (U-Pb) detrital zircon dates for the Paveloff Siltstone Member of the Chinitna Formation and the lower sandstone member of the Naknek Formations, permitting insights into the depositional ages of these units and revealing discrepancies between this new geochronology and the long-established biostratigraphy and/or the current geologic time scale. We conducted laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) U-Pb detrital zircon geochronology of two sandstone samples from Oil Bay in Cook Inlet, Alaska. Samples were prepared and analyzed by GeoSep Services. All files are available from the DGGS website: http://doi.org/10.14509/30180.

Data and Resources

Field Value
access_constraints ["Use Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.", "Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below)."]
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licence ["The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product."]
metadata-date 2019-09-17
metadata-language eng; USA
metadata_type geospatial
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resource-type dataset
responsible-party [{"name": "Alaska Division of Geological & Geophysical Surveys", "roles": ["pointOfContact"]}]
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • basins
  • callovian
  • chinitna-formation
  • ckan
  • cook-inlet
  • detrital-zircon
  • forearc-basin
  • formations
  • gas
  • geo
  • geochronology
  • geologic
  • geology
  • geoss
  • iniskin-bay
  • jurassic
  • kimmeridgian
  • lead
  • methods
  • naknek-formation
  • national
  • nonmarine
  • north-america
  • oil-bay
  • oxfordian
  • paveloff-siltstone-member
  • petroleum
  • provenance
  • resources
  • rocks
  • sediment
  • sedimentary
  • sedimentation
  • sedimentology
  • siltstone
  • stratigraphy
  • tuxedni-bay
  • tuxedni-group
  • united-states
  • uranium
  • volcanic
  • zircon
isopen False
metadata_created 2025-11-20T08:03:10.837400
metadata_modified 2025-11-20T08:03:10.837404
notes This report and it's accompanying analytical data present uranium-lead (U-Pb) detrital zircon dates for the Paveloff Siltstone Member of the Chinitna Formation and the lower sandstone member of the Naknek Formations, permitting insights into the depositional ages of these units and revealing discrepancies between this new geochronology and the long-established biostratigraphy and/or the current geologic time scale. We conducted laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) U-Pb detrital zircon geochronology of two sandstone samples from Oil Bay in Cook Inlet, Alaska. Samples were prepared and analyzed by GeoSep Services. All files are available from the DGGS website: http://doi.org/10.14509/30180.
num_resources 2
num_tags 44
title Detrital zircon maximum depositional dates for the Jurassic Chinitna and Naknek Formations, lower Cook Inlet, Alaska: A preliminary view