Geochemistry of some quaternary lavas from the Aleutian Arc and Mt. Wrangell

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Frequently anticipated questions:


What does this data set describe?

Title:
Geochemistry of some quaternary lavas from the Aleutian Arc and Mt. Wrangell
Abstract:
This publication contains previously unpublished geochemical analyses or re-analyses of lavas, magmatic inclusions, and a few gabbroic cumulate inclusions from Alaska volcanoes (Akutan, Augustine, Buzzard Creek, Dana, Douglas, Fourpeaked, Frosty, Great Sitkin, Iliamna, Kaguyak, Kiska, Okmok, Prindle Cone, Recheshnoi, Redoubt, Spurr, Ukinrek Maars, Vsevidof, Westdahl, Wrangell) collected by the authors and others over the past 35 years. It provides substantial data sets for three volcanoes (Vsevidof, Westdahl, and Douglas) for which little or no published data exist. All analyses were made by the GeoAnalytical laboratory at Washington State University in Pullman, WA. The ICP/MS data have been reduced using the 2006 calibration to ensure internal consistency of the data set despite the twenty-year span over which the analyses were made. Files can be downloaded from the DGGS website (<http://doi.org/10.14509/29843>).
Supplemental_Information:
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.
  1. How should this data set be cited?

    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:

    Other_Citation_Details: 28 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -182.39600
    East_Bounding_Coordinate: -141.63221
    North_Bounding_Coordinate: 64.061082
    South_Bounding_Coordinate: 51.928761

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 1985
    Ending_Date: 2010
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: report and digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a point data set.

    2. What coordinate system is used to represent geographic features?

      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.

  7. How does the data set describe geographic features?

    rdf2018-1-geochem-data.csv, rdf2018-1-geochem-metadata.csv
    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. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory.)


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    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.

  3. To whom should users address questions about the data?

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays


Why was the data set created?

Geochemical data from these localities provide insight into the eruptive history and character of volcanic deposits and eruptions throughout Alaska.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 2010 (process 1 of 2)
    Field data collection - Lavas, magmatic inclusions, and a few gabbroic cumulate inclusions were collected from Alaska volcanoes by the authors and others over the past 35 years. Sample originators for each sample are noted in the report and in the data table.

    Date: 2010 (process 2 of 2)
    Rock sample analysis - Rock samples were analyzed for major and trace-element composition by the Washington State University (WSU) GeoAnalytical Laboratory. See accompanying report for significant additional information about laboratory methods, pertinent calculations, data calibration, significant figures, and estimates of the analytical precision for each chemical species.

  3. What similar or related data should the user be aware of?

    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:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    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.

  2. How accurate are the geographic locations?

    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.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This data release is complete.

  5. How consistent are the relationships among the observations, including topology?

    not applicable


How can someone get a copy of the data set?

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.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
  2. What's the catalog number I need to order this data set?

    RDF 2018-1

  3. What legal disclaimers am I supposed to read?

    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.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 19-Jan-2018
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.21 on Fri Jan 19 12:32:02 2018