Catalog of drill log cards and sample images from USGS seismic shothole sites in the National Petroleum Reserve - Alaska (1974-1981)

Catalog of drill log cards and sample images from USGS seismic shothole sites in the National Petroleum Reserve - Alaska (1974-1981), Raw Data File 2025-18, provides a database of georeferenced shotine and sample locations and high-resolution images of cards and recovered drill cuttings from approximately 26,124 shothole sites in the National Petroleum Reserve in Alaska (NPR-A). The samples were collected between 1944 and 1982 during seismic exploration involving nearly 98,753 boreholes. They are stored in labeled bags grouped by shothole within boxes at the Alaska Geologic Materials Center (GMC), which can be located using the GMC's online inventory, https://maps.dggs.alaska.gov/gmc/inventory/search. DGGS staff obtained location data from the NPR-A Legacy Seismic Data Archive (USGS and CERSC, 2019), verified and matched drill cards to sample bags, and photographed each sample after pulverizing and arranging it on a glass plate beside its labeled bag and card. This setup was designed to highlight key sediments such as pebbles or coal fragments. The Alaska Division of Geological & Geophysical Surveys (DGGS) cataloged these samples as part of a multi-year sand and gravel resource assessment conducted under the Arctic Strategic Transportation and Resources Project (ASTAR). ASTAR is a collaborative initiative led by the Alaska Department of Natural Resources in partnership with the North Slope Borough to support sustainable infrastructure and economic development in North Slope communities. The effort improves access to historical resource data, supports coordinated planning, reduces duplication, and provides valuable insights into construction materials and coal resources essential for land-use planning and management in remote regions like the NPR-A. All files can be downloaded from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30840).

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Organization: State of Alaska