geochron-data: Geochronology lab files and applicable documentation.
Herriott, T.M., Wartes, M.A., O'Sullivan, P.B., and Gillis, R.J., 2019, Detrital zircon maximum depositional dates for the Jurassic Chinitna and Naknek Formations, lower Cook Inlet, Alaska: A preliminary view: Preliminary Interpretive Report PIR 2019-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
This is a point data set.
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0001. Longitudes are given to the nearest 0.0001. Latitude and longitude values are specified in decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is GRS 80.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257222101000025.
The State of Alaska funded this work. Merlin "Spanky" Handley safely transported our field crew to collect samples in Oil Bay. We thank Alaska Homestead Lodge for their hospitality. Discussions with Jamey Jones, Richard Lease, Matt Rioux, Jim Crowley, Mark Schmitz, and Mareca Guthrie improved this study. Kristen Janssen formatted this report, and Simone Montayne managed the metadata. Dave LePain and Mandy Willingham provided reviews that improved this paper.
The Alaska Division of Geological & Geophysical Surveys leads a basin analysis program in Cook Inlet of south-central Alaska. This program aims to improve understanding of the region's petroleum geology and includes work in the Iniskin Bay-Tuxedni Bay area of lower Cook Inlet. A major focus of these studies is the Jurassic forearc stratigraphy, which hosts the basin's oil source rocks. Robust biostratigraphic constraints provide temporal context for this economically significant Jurassic succession. However, prior to this work, no modern radioisotopic dates were available to render absolute age control. Chronostratigraphy is an integral part of basin analysis, and geochronologic dates are commonly obtained to refine existing frameworks that have historically relied on paleontologic collections.
These data are being released in the DGGS Preliminary Interpretive Report series. This category is intended for the timely release of maps and reports with preliminary interpretation of geology or analytical data. The publication has undergone limited peer review but does not necessarily conform to DGGS editorial standards. Interpretations or conclusions contained in this publication are subject to change.
Locations were measured using a recreational grade GPS. Note that location coordinates for sample 09BG010-14.5C (N59.66258Â° W153.27545Â° [NAD83]) are tied to the base of a measured section that lies 14.5 m stratigraphically below the sampled bed.
This data release is complete but does not include comprehensive metadata for all of the analytical fields in the data tables. The data and limited metadata provided by the originating lab were deemed sufficiently understandable for the intent of this analysis, and attempts to obtain more comprehensive documentation from the lab were unsuccessful. Requests for additional information regarding the parameters and definitions of the analytical values should be directed to the originating lab.
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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.
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|Data format:||ASCII tabular files|