Raw point data: Raw point data for all samples and working standards in the order they were run on the electron microprobe. File contains normalized (to 100%) point data omitting points that have been filtered out (e.g. mineral inclusion, epoxy, low or high totals, etc.). Sample metadata and normalized averages: Sample metadata (description, location, etc.) and normalized and averaged major-oxide data each sample.
Wallace, K.L., Hayden, L.A., and Neal, C.A., 2017, Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, Alaska: Raw Data File RDF 2017-9, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This is a point data set.
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees.
The horizontal datum used is World Geodetic System of 1984.
The ellipsoid used is WGS 84.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257223563000025.
This project is funded through the U.S. Geological Survey Volcano Science Center, and this raw data file (RDF) is published through the State of Alaska Division of Geological & Geophysical Surveys (DGGS) with funding provided under USGS Volcano Hazard Program/DGGS cooperative agreement G16AC00165. The authors would like to thank Katherine Mulliken and Cheryl Cameron at DGGS for their guidance formatting the dataset for quick inclusion in the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA) and for support with producing map figures.
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This Raw Data File presents major-oxide glass geochemical results from the ca. 3.6 ka caldera-forming eruption of Aniakchak volcano, Alaska. These data are part of a larger effort to identify and characterize tephra deposits from the largest eruptions in Alaska for use as geochronological marker horizons. Aniakchak is one of at least 29 volcanoes in Alaska that has had multiple large tephra-producing eruptions.
Armstrong, J.T., 1995, CITZAF: a package of correction programs for the quantitative electron microbeam X-ray analysis of thick polished materials, thin films, and particles: null v. 4, Microbeam Analysis Society, New York.Online Links:
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Jarosewich, Eugene, Nelen, J.A., and Norberg, J.A., 1979, Electron-microprobe reference samples for standard analysis: null v. 22, Smithsonian Institution Press, Washington, DC.Online Links:
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Deer, W.A., Howie, R.A., and Zussman, Jack, 1992, An introduction to the rock-forming minerals (2d ed.): Longman Scientific & Technical, Essex, England.Online Links:
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Data sources used in this process:
Data sources used in this process:
Bacon, C.R., Neal, C.A., Miller, T.P., McGimsey, R.G., and Nye, C.J., 2014, Postglacial eruptive history, geochemistry, and recent seismicity of Aniakchak volcano, Alaska Peninsula: Professional Paper P 1810, U.S. Geological Survey, United States.Online Links:
Dunning, H.A., 2011, Extending the applications of tephrochronology in northwestern North America: University of Alberta, Alberta.Online Links:
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Kienle, Juergen, and Swanson, S.E., 1983, Volcanism in the eastern Aleutian Arc: late Quaternary and Holocene centers, tectonic setting and petrology: null v. 17, no. 1-4, Elsevier, Atlanta, GA.Online Links:
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Miller, T.P., and Smith, R.L., 1977, Spectacular mobility of ash flows around Aniakchak and Fisher calderas, Alaska: null v. 5, Geological Society of America, Boulder, CO.Online Links:
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Riehle, J.R., Meyer, C.E., Ager, T.A., Kaufman, D.S., and Ackerman, R.E., 1987, The Aniachak tephra deposit, a late Holocene marker horizon in western Alaska: Circular C 998, U.S. Geological Survey, United States.Online Links:
This data set is being released in the DGGS Raw Data File series. The information has been examined by several geologists familiar with the study area, but the data and accompanying report have not been formally reviewed for technical content or for conformity to the editorial standards of DGGS. The procedures used to ensure analytical quality are discussed in the accompanying manuscript.
Samples were collected from a single coastal bluff outcrop. Uncertainty associated with the location coordinates is unknown, but is estimated to be less than 30 meters.
This data release is complete.
not applicable
Are there legal restrictions on access or use of the data?
- 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).
- 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.
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RDF 2017-9
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DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.
| Data format: | sample-location-details |
|---|---|
| Network links: |
<http://doi.org/10.14509/29777> |
(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov