geochem-data: Major-oxide XRF and trace-element XRF and ICP-MS analyses of lavas, magmatic inclusions, and a few gabbroic cumulate inclusions from various Alaskan volcanoes.
Nye, C.J., Beget, J.E., Layer, P.W., Mangan, M.T., McConnell, V.S., McGimsey, R.G., Miller, T.P., Moore, R.B., and Stelling, P.L., 2018, Geochemistry of some quaternary lavas from the Aleutian Arc and Mt. Wrangell: Raw Data File RDF 2018-1, 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 0.000001. Longitudes are given to the nearest 0.000001. 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.
This work was made possible by cooperative agreements between the U.S. Geological Survey Volcano Hazards Program and the State of Alaska Division of Geological & Geophysical Surveys. The accompanying report provides additional detail about sample originators.
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Geochemical data from these localities provide insight into the eruptive history and character of volcanic deposits and eruptions throughout 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.Online Links:
This publication is intended for the timely release of raw field and/or analytical data and does not include interpretations (other than brief discussion of geologic context) of the data presented. It has undergone limited internal review and does not necessarily conform to the DGGS editorial standards. The accompanying report provides significant additional information about pertinent calculations, data calibration, significant figures, and estimates of the analytical precision for each chemical species.
Methods for obtaining location coordinates varies throughout the data. Coordinates for most modern samples were collected using handheld GPS units. Locations for older samples were digitized from field maps or visually approximated using web-based satellite imagery. In a few cases, the originating location coordinates were lost and location information is limited to the volcano name. Positional accuracy was not recorded.
This data release is complete.
not applicable
Are there legal restrictions on access or use of the data?
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RDF 2018-1
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| Data format: | ASCII tabular files |
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| Network links: |
<http://doi.org/10.14509/29843> |
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