SIO Mn Nodule Analysis File NGDC MGG15995013

Metadata also available as - [Outline] - [Parseable text]

Frequently-anticipated questions:

What does this data set describe?

Title:
SIO Mn Nodule Analysis File NGDC MGG15995013
Abstract:
The World Sediment Data Bank and Manganese Nodule Analysis File, compiled at the Scripps Institution of Oceanography through 1979 represent the largest organized data files available on ferromanganese deposits on the ocean floor. The compilation was partially funded by the U.S. National Science Foundation through the International Decade of Ocean Exploration Program. A copy of the nodule analysis data, and portions of the sediment data were transferred to NGDC for distribution, after compilation stopped at SIO, by Mary Fisk. The SIO nodule data were incorporated into the NGDC Marine Minerals Database, and are offered on the NOAA & MMS Marine Minerals CD-ROM Data Set described elsewhere. The following is a description of the format/field contents for SIO station records, major element analysis records, and "extra" element analysis records in their original format, as transferred to NGDC. Each file is ASCII with fixed-length fields. Column headers are embedded in each file, as received by NGDC from SIO. The nodule analyses are also represented in the NGDC Marine Minerals Database in searchable form on the marine minerals CD-ROM, as well as in dbms and spreadsheet form.
Supplemental_Information: Data are available for free download from NGDC's Web server.
  1. How should this data set be cited?

    Frazer, Jane, Fisk, Mary, and Scripps Institution of Oceanography, 1981, SIO Mn Nodule Analysis File NGDC MGG15995013.

    Online Links:

    Other_Citation_Details:
    related files available from NGDC: SIO sediment descriptions files, NOAA & MMS Marine Minerals CD-ROM Data Set

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -179.9967
    East_Bounding_Coordinate: 179.9967
    North_Bounding_Coordinate: 75.603
    South_Bounding_Coordinate: -65.617

  3. What does it look like?

    MnNOD.jpg (.jpg)
    Sample distribution displayed in a GIS with land for reference.

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

    Calendar_Date: 1979
    Currentness_Reference: 1981

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

    Geospatial_Data_Presentation_Form: vector 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. It contains the following vector data types (SDTS terminology):

      • Entity point (861 entity points.)

    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 .001. Longitudes are given to the nearest .001. Latitude and longitude values are specified in decimal degrees.

      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Unknown
      Depth_Resolution: 1.0
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values

  7. How does the data set describe geographic features?

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?

    Credit belongs to the The Scripps Institution of Oceanography as the originators of the data, and the National Geophysical Data Center for the maintenance and accessibility of the data.

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

    National Geophysical Data Center (NGDC)
    E/GC 325 Broadway
    Boulder, CO 80305-3328
    USA

    303-497-6826 (voice)
    ngdc.info@noaa.gov

Why was the data set created?

The Scripps Institution of Oceanography compiled data on the geochemistry of marine ferromanganese nodules as part of the International Decade of Ocean Exploration, funded by the National Science Foundation. The files were discontinued in 1981. The SIO files contain data from approximately 1,500 samples collected at 800 locations worldwide. Data were abstracted from the literature, and other sources. The four files include data source, latitude/longitude, sampling device, water depth, nodule type, and weight percentages of selected elements. Files of additional elemental analyses, and bibliographic references are also included. The SIO data are also included in the NGDC marine minerals data base.

How was the data set created?

  1. From what previous works were the data drawn?

    Sediment Data Bank Coding Instructions (source 1 of 1)
    Frazer, J.Z., Freelander, N.A., Hawkins, D.L., and Scripps Institution of Oceanography, 1978, Sediment Data Bank Coding Instructions: Scripps Institution of Oceanography Reference No. 78-9.

    Type_of_Source_Media: .pdf and digital data
    Source_Contribution:
    Ship, cruise, sample id, latitude/longitude, water depth, sampling device, core length, geochemical composition.

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

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

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

  1. How well have the observations been checked?

    Accuracy of each attribute is dependent on the accuracy of the lineage data.

  2. How accurate are the geographic locations?

    Unknown. No navigational technique information is given in the Scripps Institution of Oceanography Ferromanganese Nodule Analysis File; therefore data have unknown original horizontal positional accuracy. Latitude and longitude are given in decimal degrees, to the thousanth of a degree.

  3. How accurate are the heights or depths?

    Unknown.

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

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

    Data within the SIO Mn Nodule Analysis File database were extracted from several reports.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
Public domain data from the U.S. government is freely redistributable with proper metadata and source attribution 1.) Recognize the source of information as: National Geophysical Data Center NGDC; 2.) Cite this reference in all publications, reports, and posters
Use_Constraints: None

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

    National Geophysical Data Center (NGDC)
    E/GC 325 Broadway
    Boulder, CO 80305-3328
    Contact_Voice_Telephone 303-497-6826

    303-497-6826 (voice)
    ngdc.info@noaa.gov

  2. What's the catalog number I need to order this data set?

    IDOE, MAGNOD, G00128 or MGGID 15995013

  3. What legal disclaimers am I supposed to read?

    Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of limitations of the data due to possible imprecision due to navigational inaccuracies and descriptive limitations of the extracted data.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 2006
Metadata author:
U.S. Geological Survey
c/o Brian J. Buczkowski
Core Curator & Data Management Specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598

508-548-8700 x2361 (voice)
bbuczkowski@usgs.gov

Contact_Instructions: Email preferred
Metadata standard:
CSDGM Version 2 (FGDC-STD-001-1998)

Generated by mp version 2.8.24 on Mon Mar 27 19:55:58 2006