AVO Geochemical Database: The Alaska Volcano Observatory geochemical database is a web based application that contains published whole-rock geochemical data for Quaternary volcanic rocks in Alaska
Cameron, C.E., Snedigar, S.F., and Nye, C.J., 2014, Alaska Volcano Observatory geochemical database: Digital Data Series DDS 8, 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 0.01. Longitudes are given to the nearest 0.01. 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 1/298.257222101.
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.
The DGGS Volcanology Section conducts geologic studies of active volcanoes and provides this information, along with volcano monitoring observations, to both scientists and the public, in a web-based, searchable format allowing for rapid, interagency, fact-based decision making to efficiently communicate volcano hazard information and science to a worldwide audience. Alaska Volcano Observatory's geochemical database contains published whole-rock data for Quaternary volcanic rocks in Alaska, linked to geologist, publication, source volcano (where possible), and other sample and analysis metadata.
Although we have made an extensive effort to provide the best data possible for each sample and analysis-often locating little-used references and untangling changing sample nomenclatures through time-we expect that routine use of the database will still uncover some errors. We ask users to please let us know of any they might find (firstname.lastname@example.org), and to always check the original reference as the final authority. We encourage users to read database documentation (https://www.avo.alaska.edu/geochem/help.php) for a comprehensive discussion of data entry protocols.
Locations were determined based on 1) coordinate values listed on the publication, digitized from the published map, or loaded from a digital spreadsheet; 2) personal correspondence or unpublished field maps or notes provided by the originator; or 3) if no sample-specific location is available, the default location of the volcano itself. Consequently, location certainty varies considerably throughout the dataset. Users requiring highly accurate locations for their area of interest should consult the originating data source or reference to determine if the location certainty is within acceptable parameters. All locations were converted to the NAD83 coordinate system.
Development of this database is ongoing. It is our intention to update this dataset as new volcano-related geochemical data is published.
Are there legal restrictions on access or use of the data?
- 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).
- 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.
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 (email@example.com), 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.
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