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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    LA-ICP-MS uranium lead geochronologic data of zircon from igneous and meta-igneous rocks in the Mount Harper project area, Eagle, Tanacross, Mount Hayes, and Big Delta quadrangles, Alaska

    Metadata Updated: July 5, 2025

    LA-ICP-MS uranium lead geochronologic data of zircon from igneous and meta-igneous rocks in the Mount Harper project area, Eagle, Tanacross, Mount Hayes, and Big Delta quadrangles, Alaska, Raw Data File 2025-4, provides uranium-lead (U-Pb) geochronologic data from single zircon spots, analyzed using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Alaska Division of Geological & Geophysical Surveys (DGGS) staff collected zircon data from 31 samples of igneous and meta-igneous rocks, primarily selected during the 2022 field season in support of the Earth Mapping Resources Initiative (Earth MRI) Mount Harper project. Three of these samples were analyzed to support geologic interpretation in the Taylor Mountain map area. One sample was collected during the 2018 field season in support of the Richardson mining district mapping project, which has since been incorporated into the Mount Harper project area. The goal of this dataset is to determine the age of igneous activity to support geologic mapping efforts, tectonic interpretations, and characterization of mineralization in the Yukon-Tanana Uplands of Interior Alaska. Crystallization age data are organized in the age summary data table with our interpreted crystallization ages, sample location information, and sample descriptions. The zircon grain data table contains isotopic and elemental data for each zircon spot analyzed. Both tables have accompanying data dictionaries. These data and report are available from the DGGS website: http://doi.org/10.14509/31552.

    Access & Use Information

    Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

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    Dates

    Metadata Date July 3, 2025
    Metadata Created Date July 5, 2025
    Metadata Updated Date July 5, 2025
    Reference Date(s) January 1, 2025 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from Alaska Division of Geological and Geophysical Surveys

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date July 3, 2025
    Metadata Created Date July 5, 2025
    Metadata Updated Date July 5, 2025
    Reference Date(s) January 1, 2025 (publication)
    Responsible Party Alaska Division of Geological & Geophysical Surveys (Point of Contact)
    Contact Email
    Guid 5427c640-e3ee-4952-a8e1-a65c7d5078d6_source
    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).
    Bbox East Long -142.019858
    Bbox North Lat 64.464100
    Bbox South Lat 63.777042
    Bbox West Long -146.532882
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 5427c640-e3ee-4952-a8e1-a65c7d5078d6
    Harvest Source Id 8f77b6d5-f630-4995-bdf3-0aee7158a7f3
    Harvest Source Title Alaska Division of Geological and Geophysical Surveys
    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.
    Lineage This lineage was generated by the FGDC CSDGM to 19139 transformation
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-146.532882, 63.777042], [-142.019858, 63.777042], [-142.019858, 64.4641], [-146.532882, 64.4641], [-146.532882, 63.777042]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2018-01-01
    Temporal Extent End 2025-01-01

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