USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data

World phosphate mines, deposits, and occurrences

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

Frequently anticipated questions:


What does this data set describe?

Title: World phosphate mines, deposits, and occurrences
Abstract:
Geologic and mineral resource information for 1635 deposits of phosphate worldwide
  1. How might this data set be cited?
    Chernoff, Carlotta B., and Orris, Greta. J., 2002, World phosphate mines, deposits, and occurrences: Open-File Report 2002-156, U.S. Geological Survey, Menlo Park, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -178.81667
    East_Bounding_Coordinate: 177.3
    North_Bounding_Coordinate: 69.45
    South_Bounding_Coordinate: -50.3333
  3. What does it look like?
    https://mrdata.usgs.gov/phosphate/ofr-2002-156.png (PNG)
    Small-scale map showing site locations, 540 x 180 pixels
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2002Currentness_Reference: Original publication date
  5. What is the general form of this data set?
  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 (1187)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitude and longitude values are specified in decimal degrees. The horizontal datum used is World Geodetic System 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.
  7. How does the data set describe geographic features?
    commodity
    Commodities present at the site
    rec_no
    Record ID.

    Database record identifier, a value of main:recno. Integer values. Int of width 6.
    Range of values
    Minimum:1
    Maximum:1635
    Resolution:1
    value
    Commodity.

    Mineral commodity present at the site. Textual values of no more than 4 characters.
    main
    Site location and characteristics
    rec_no
    Record ID.

    Database record identifier. Integer values. Int of width 6.
    Range of values
    Minimum:1
    Maximum:1635
    Resolution:1
    country
    Country.

    Name of country in which the deposit occurs. Textual values of no more than 40 characters.
    ValueDefinition
    (no value)Information not available for this record. 1 records have no value for country.
    stprov
    State or province.

    State or province where the deposit occurs. Textual values of no more than 40 characters.
    ValueDefinition
    (no value)Information not available for this record. 476 records have no value for stprov.
    county
    County.

    Third order political subdivision containing the deposit, such as a county. Textual values of no more than 40 characters.
    ValueDefinition
    (no value)Information not available for this record. 1342 records have no value for county.
    location
    Location description.

    General description of the location. Textual values of no more than 96 characters.
    ValueDefinition
    (no value)Information not available for this record. 134 records have no value for location.
    site_name
    Site name.

    Name or names by which the site is known. Textual values of no more than 100 characters.
    ValueDefinition
    (no value)Information not available for this record. 1255 records have no value for site_name.
    commodity
    Commodities.

    List of commodities present at the site. Textual values of no more than 10 characters.
    ValueDefinition
    (no value)Information not available for this record. 4 records have no value for commodity.
    analytical
    Analytical data.

    Physical, chemical, or mineralogical analyses describing materials at the site. Textual values of no more than 254 characters.
    ValueDefinition
    (no value)Information not available for this record. 1329 records have no value for analytical.
    latitude
    Latitude.

    Geographic latitude in decimal degrees, WGS84. Real numbers stored in double precision.
    ValueDefinition
    (no value)Information not available for this record. 448 records have no value for latitude.
    Range of values
    Minimum:-50.33333
    Maximum:70.95
    Units:decimal degrees
    longitude
    Longitude.

    Geographic longitude in decimal degrees, WGS84. Real numbers stored in double precision.
    ValueDefinition
    (no value)Information not available for this record. 448 records have no value for longitude.
    Range of values
    Minimum:-178.816667
    Maximum:177.3
    Units:decimal degrees
    loc_comm
    Comments on location.

    General comments on the location or how well we know it. Textual values of no more than 176 characters.
    ValueDefinition
    (no value)Information not available for this record. 1245 records have no value for loc_comm.
    disc_yr
    Discovery year.

    Year in which the deposit was discovered. Textual values of no more than 32 characters.
    ValueDefinition
    (no value)Information not available for this record. 1472 records have no value for disc_yr.
    prod
    Production.

    General characteristics of production at the site. Textual values of no more than 48 characters.
    ValueDefinition
    (no value)Information not available for this record. 766 records have no value for prod.
    ann_prod
    Annual production.

    Annual production at the site in millions of metric tons of ore. Textual values of no more than 96 characters.
    ValueDefinition
    (no value)Information not available for this record. 1442 records have no value for ann_prod.
    cum_prod
    Cumulative production.

    Cumulative production at the site in millions of metric tons of ore. Textual values of no more than 80 characters.
    ValueDefinition
    (no value)Information not available for this record. 1476 records have no value for cum_prod.
    min_method
    Mining methods.

    Methods by which materials are extracted from the site. Textual values of no more than 20 characters.
    ValueDefinition
    (no value)Information not available for this record. 1020 records have no value for min_method.
    resources
    Resource estimates.

    Estimates of the mineral endowment. Textual values of no more than 254 characters.
    ValueDefinition
    (no value)Information not available for this record. 1059 records have no value for resources.
    company
    Company name.

    Name of the company associated with the site as operator, owner, or both. Textual values of no more than 80 characters.
    ValueDefinition
    (no value)Information not available for this record. 1419 records have no value for company.
    dep_type
    Deposit type.

    General type of deposit. Textual values of no more than 96 characters.
    ValueDefinition
    (no value)Information not available for this record. 99 records have no value for dep_type.
    sub_type
    Deposit subtype.

    Specific subtype of deposit; form or style of mineralization. Textual values of no more than 192 characters.
    ValueDefinition
    (no value)Information not available for this record. 638 records have no value for sub_type.
    min_age_g
    Mineralization age (general).

    General age of mineralization. Textual values of no more than 96 characters.
    ValueDefinition
    (no value)Information not available for this record. 506 records have no value for min_age_g.
    min_age_s
    Mineralization age (specific).

    Specific age of mineralization. Textual values of no more than 52 characters.
    ValueDefinition
    (no value)Information not available for this record. 1286 records have no value for min_age_s.
    host_age
    Host rock age.

    Age of associated magmatism or host rocks. Textual values of no more than 40 characters.
    ValueDefinition
    (no value)Information not available for this record. 1561 records have no value for host_age.
    host_lith
    Host rock lithology.

    Lithologic description of host or associated rocks. Textual values of no more than 208 characters.
    ValueDefinition
    (no value)Information not available for this record. 517 records have no value for host_lith.
    host_unit
    Host rock unit.

    Host rock formation or complex name. Textual values of no more than 88 characters.
    ValueDefinition
    (no value)Information not available for this record. 1196 records have no value for host_unit.
    minerals
    Minerals present.

    Major minerals present at the site. Textual values of no more than 232 characters.
    ValueDefinition
    (no value)Information not available for this record. 1302 records have no value for minerals.
    descript
    Description.

    Geologic comments or description of the deposit. Textual values of no more than 254 characters.
    ValueDefinition
    (no value)Information not available for this record. 1161 records have no value for descript.
    age_ref
    Age references.

    Bibliographic references (short citations) providing information about the age of the deposit. Textual values of no more than 128 characters.
    ValueDefinition
    (no value)Information not available for this record. 617 records have no value for age_ref.
    comments
    Comments.

    General comments on the deposit or our knowledge of it. Textual values of no more than 254 characters.
    ValueDefinition
    (no value)Information not available for this record. 1229 records have no value for comments.
    loc_ref
    Location references.

    Bibliographic references (short citations) providing information about the location of the deposit. Textual values of no more than 96 characters.
    ref
    General references.

    Bibliographic references (short citations) providing general information about the site or deposit. Textual values of no more than 224 characters.
    ValueDefinition
    (no value)Information not available for this record. 275 records have no value for ref.
    mas_id
    MAS/MILS ID number.

    Record number of the same site as described in the MAS/MILS database. Textual values of no more than 32 characters.
    ValueDefinition
    (no value)Information not available for this record. 1365 records have no value for mas_id.
    mrds_id
    MRDS ID number.

    Record number of the same site as described in MRDS. Textual values of no more than 32 characters.
    ValueDefinition
    (no value)Information not available for this record. 1371 records have no value for mrds_id.
    minerals
    Minerals present at the site
    rec_no
    Record ID.

    Database record identifier, a value of main:recno. Integer values. Int of width 6.
    Range of values
    Minimum:1
    Maximum:1635
    Resolution:1
    value
    Mineral name.

    Name of a mineral present at the site. Textual values of no more than 48 characters.
    other_db
    Other databases describing this site
    rec_no
    Record ID.

    Database record identifier, a value of main:recno. Integer values. Int of width 6.
    Range of values
    Minimum:1
    Maximum:1635
    Resolution:1
    db
    Database name.

    Identifying abbreviation of another database. Textual values of no more than 4 characters.
    value
    Record ID.

    Identifier of a record within the other database that describes the same site or deposit. Textual values of no more than 10 characters.
    ref
    Bibliographic references describing the site
    ref_id
    Reference ID.

    Distinct identifier of this bibliographic reference. Integer values. Int of width 6.
    Range of values
    Minimum:1
    Maximum:272
    Resolution:1
    short_ref
    Short citation.

    Short citation for the bibliographic reference, such as might be used within the text of a report. Textual values of no more than 254 characters.
    reference
    Bibliographic reference.

    Long form of the bibliographic reference, such as might be listed at the end of a report. Textual values of no more than 254 characters.
    reflink
    Short citation link to bibliography
    rec_no
    Record ID.

    Database record identifier, a value of main:recno. Integer values. Int of width 6.
    Range of values
    Minimum:1
    Maximum:1635
    Resolution:1
    subject
    Subject category.

    General category of concern for which the reference is relevant. Textual values of no more than 10 characters.
    short_ref
    Short citation.

    Short citation of the bibliographic reference, a value o ref:short_ref. Textual values of no more than 128 characters.
    datadxny
    Data dictionary, explaining tables and fields
    id
    Row ID.

    Row identifier within datadxny table. Integer values. Int of width 0.
    Range of values
    Minimum:1
    Maximum:68
    Resolution:1
    tblorder
    Table order.

    Order in which this table should appear in some presentations. Integer values. Int of width 0.
    Range of values
    Minimum:2
    Maximum:7
    Resolution:1
    tblname
    Table name.

    Name of the table. Textual values of no more than 20 characters.
    number
    Field order.

    Order in which this field occurs in the RDBMS. Integer values. Int of width 0.
    ValueDefinition
    (no value)Information not available for this record. 7 records have no value for number.
    Range of values
    Minimum:1
    Maximum:33
    Resolution:1
    label
    Field label.

    Label of the field in the RDBMS. Textual values of no more than 32 characters.
    ValueDefinition
    (no value)Information not available for this record. 7 records have no value for label.
    category
    Category.

    General category of information provided by the contents of the field. Textual values of no more than 50 characters.
    ValueDefinition
    (no value)Information not available for this record. 1 records have no value for category.
    short_desc
    Short description.

    Descriptive name of the field used in some presentations, not constrained by rules affecting the label. Textual values of no more than 40 characters.
    ValueDefinition
    (no value)Information not available for this record. 1 records have no value for short_desc.
    description
    Description.

    Longer description of the purpose and contents of the field. Textual values of no more than 254 characters.
    link
    Link.

    URL providing more information about the field. Textual values of no more than 96 characters.
    ValueDefinition
    (no value)Information not available for this record. 68 records have no value for link.
    origin
    Origin.

    Abbreviation of an organization, data set, or other entity responsible for defining the field. Textual values of no more than 12 characters.
    ValueDefinition
    (no value)Information not available for this record. 68 records have no value for origin.
    sqltype
    SQL data type.

    Data type of the field as used in the RDBMS. Textual values of no more than 8 characters.
    ValueDefinition
    (no value)Information not available for this record. 7 records have no value for sqltype.
    dbftype
    DBF field type.

    Data type of the field when expressed in DBF. Textual values of no more than 1 characters.
    ValueDefinition
    (no value)Information not available for this record. 7 records have no value for dbftype.
    width
    DBF field width.

    Field width when expressed in DBF. Integer values. Int of width 0.
    ValueDefinition
    (no value)Information not available for this record. 7 records have no value for width.
    Range of values
    Minimum:0
    Maximum:4096
    Resolution:1
    prec
    DBF field precision.

    Precision of the field (places to right of decimal) when expressed in DBF, only for numeric fields. Integer values. Int of width 0.
    ValueDefinition
    (no value)Information not available for this record. 61 records have no value for prec.
    Range of values
    Minimum:0
    Maximum:5
    Resolution:1
    units
    Units.

    Units of measure of the field values. Textual values of no more than 64 characters.
    ValueDefinition
    (no value)Information not available for this record. 66 records have no value for units.

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?
  3. To whom should users address questions about the data?
    Peter N Schweitzer
    USGS ER GD
    Geologist
    12201 Sunrise Valley Drive
    Reston, VA
    USA

    703-648-6533 (voice)
    703-648-6252 (FAX)
    pschweitzer@usgs.gov

Why was the data set created?

Provide an updated inventory of sites known to contain potentially exploitable mineral resources to support the development of comprehensive descriptive deposit models and grade-tonnage models.

How was the data set created?

  1. From what previous works were the data drawn?
    OFR 02-156 (source 1 of 1)
    Chernoff, Carlotta B., and Orris, Greta J., 2002, Data set of world phosphate mines, deposits, and occurrences-- Part A. Geologic Data; Part B. Location and Mineral Economic Data: Open-File Report 2002-156, U.S. Geological Survey, Menlo Park, California.

    Online Links:

    Type_of_Source_Media: digital data
    Source_Contribution:
    Entire source of data. Some minor spelling corrections, re-formatting, reduction of non-informative values, and explicit linking of reference information was carried out to create the version found on MRData.usgs.gov.
  2. How were the data generated, processed, and modified?
    Date: 2001 (process 1 of 2)
    G.J. Orris and C.B. Chernoff compiled the data on world phosphate deposits from previously published compilations, new published sources, "gray" literature, company internet sites, and other sources. Locations were commonly taken from published sources, no effort was made to determine the correctness of these data beyond a preliminary review to be sure they plot in the correct country. Other locations were found using the GEOnet Names server on the National Imagery and Mapping Agency's website, www.nima.mil. Still other locations were determined using available maps of varying scales. Most of the latitudes-longitudes are believed to be within 5 minutes of their true locations, but other locations may be highly inaccurate due to inadequate or incorrect location data.
    Date: Jan-2012 (process 2 of 2)
    Reformatting of the data, rearranging into separate relational tables, explicit linking, where possible, of short references with bibliography entries, reduction of non-informative data values. For example, "Unknown" need not be spelled out because a NULL value carries this meaning.

    OGC WMS, WFS, search, and data selection and download interfaces developed to enhance visibility and utility of these data. Data sources used in this process:
    • OFR 02-156
    Data sources produced in this process:
  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?
    The accuracy of file data attributes is highly variable, especially for some parts of Africa and Asia. Most locations are believed to be within 5 minutes of the exact location; some locations are for the nearest town, and other locations may be highly inaccurate. Location errors are a result of inadequate or incorrect original data, error caused by multiple locations with the same name, and error introduced by data entry or location format conversion. Data were plotted at a preliminary stage to check that sites plotted in the correct country and the data tables were spot-checked (1 in 5 records) against the original data.
  2. How accurate are the geographic locations?
    The horizontal positional accuracy of the digital data was checked to be sure that they plotted within the correct country. The latitudes and longitudes were largely determined using latitude-longitudes given in one of the references or determined from descriptions of the location using the maps available to us or the GEOnet Names server on the National Imagery and Mapping Agency's NIMA database. The accuracy of these locations vary with the detail of the original information.

    A consequence of these considerations is that no specific horizontal datum should be preferred for these data. Unfortunately modern GIS software requires that a datum be specified, so the WGS84 datum has been applied. However accuracy and precision of these locations does not warrant concern over the datum.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This report is the most complete compilation of phosphate mines, deposits, and occurrences known. However, it is highly likely that there are additional phosphate sites that are not included. In addition, data for many of the sites are incomplete. Determination of latitudes and longitudes for some sites were impossible given the available data.
  5. How consistent are the relationships among the observations, including topology?
    Location is not given by coordinates for 448 of the 1635 reported sites.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints: none
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Information Services
    Box 25286, Denver Federal Center
    Denver, Colorado
    USA

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
    infoservices@usgs.gov
  2. What's the catalog number I need to order this data set? USGS Open-File Report 2002-156
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (or with the North American Stratigraphic Code). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 07-Dec-2016
Metadata author:
Schweitzer, Peter, N
Eastern Mineral Resources Team
12201 Sunrise Valley Drive Mail Stop 954
Reston, VA
USA

703-648-6533 (voice)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://mrdata.usgs.gov/metadata/ofr-2002-156.faq.html>

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Peter Schweitzer
Page Last Modified: Tuesday, 21-Feb-2017 10:34:32 MST

Generated by mp version 2.9.40 on Tue Feb 21 10:34:32 2017