LAICPMS: LA-ICPMS (Laser Ablation Inductively Coupled Plasma Mass Spectrometry) zircon U-Pb results and accompanying data dictionary CAIDTIMS: CA-ID-TIMS (chemical abrasion-isotope dilution-thermal ionization mass spectrometry) zircon U-Pb results and accompanying data dictionary SummaryAges: Summary ages and accompanying data dictionary MachineRead: Key analytical data optimized for database ingestion and accompanying data dictionary
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Our base camp for several recent field seasons was at Toolik Field Station, which is placed on and surrounded by 'the ancestral hunting grounds of the Nunamiut, and occasional hunting grounds and routes of the Gwich'in, Koyukuk, and Inupiaq peoples' (www.uaf.edu/toolik/about/land-acknowledgement.php); these surrounding lands include Slope Mountain and some of the earliest known Alaska Native peoples sites in northern Alaska. We thank Arctic Slope Regional Corporation for granting access to their lands at Ninuluk Bluff, with Erik Kenning processing our permit requests. Our chronostratigraphic work in northern Alaska has benefited from discussions with Richard Lease, Peter Flaig, Joshua Long, Robert Gillis, Jared Gooley, David Houseknecht, Amanda Willingham, and Mareca Guthrie. Amanda Willingham and Michelle Gavel participated in our Slope Mountain fieldwork during 2018. Robin Carbaugh digitized laser ablation spot locations and labels on the cathodoluminescence imagery of appendix B and joined us on several traverses at Slope Mountain and Ninuluk Bluff. We thank Toolik Field Station and Happy Valley staff and managers for hosting our field crews. Tom Rat Ratledge and Sarah Rafaelli safely transported personnel during fieldwork. Kristen Janssen and Simone Montayne provided publication support. Reviews by Robert Gillis and an anonymous referee improved this data report. The State of Alaska funded this study, and funding for the analytical infrastructure of the Boise State University Isotope Geology Laboratory is provided by the National Science Foundation (grants EAR-0521221, EAR-0824974, EAR-1337887, EAR-1735889).
Resolving the ages of Alaska's stratigraphic units is foundational to understanding sedimentary basin evolution and thier hydrocarbon potential. Existing stratal age constraints in Alaska often remain tied to paleontologic assessments completed during mid-twentieth century geologic mapping campaigns led by the U.S. Geological Survey. Although many of these relative-age frameworks reflect extensive fossil collections, the provinciality and wide or ambiguous age ranges for some faunas and floras, especially at high latitudes, can present notable hurdles to further understanding of basin histories. U-Pb geochronology of zircon is starting to refine, or redefine, the chronostratigraphic frameworks in Alaska basins.
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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).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.
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.
| Data format: | table in format csv |
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https://doi.org/10.14509/31152 |