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    • Density and magnetic susceptibility measurements on Precambrian rocks in the central Upper Peninsula, Michigan, 2021-2022

    Metadata Updated: October 30, 2025

    The U.S. Geological Survey (USGS) collected rock physical property measurements to help understand causative sources of gravity and magnetic survey anomalies in the central Upper Peninsula of Michigan. A total of 1,460 measurements of magnetic susceptibility and density from 61 outcrops and 37 boreholes have been conducted on Precambrian rocks. The measurements aid in interpretation of gravity and airborne magnetic data that are helping to understand Precambrian geology and potential mineral resources. For outcrop measurements, lithologic info is provided. Sample locations were determined using handheld Global Position System units. Measurements from drill core samples at the State of Michigan public core facility in KI Sawyer and the Cleveland Cliffs Inc. drill core facility in Ishpeming are also presented. For these measurements, the drill hole name, depth, and lithologic unit are provided. We thank Cleveland Cliffs Inc. for allowing access to their drill core facility and outcrops on their lands.

    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.

    Downloads & Resources

    Dates

    Metadata Created Date September 13, 2025
    Metadata Updated Date October 30, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 13, 2025
    Metadata Updated Date October 30, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-647e59b2d34eac007b55e98f
    Data Last Modified 2024-11-20T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 65605568-a2cc-4ec7-8b06-6030e03c794a
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -88.7738, 45.8871, -86.9801, 46.6520
    Source Datajson Identifier True
    Source Hash ca69793b4eee7595ee6a74508cc2875f4110aa0fc53c5a0125b7d5cd744ea70c
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -88.7738, 45.8871, -88.7738, 46.6520, -86.9801, 46.6520, -86.9801, 45.8871, -88.7738, 45.8871}

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