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Sediment-hosted copper deposits of the world

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  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?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Cox, Dennis P., Lindsey, David A., Singer, Donald A., and Diggles, Michael F., 2003, Sediment-hosted copper deposits of the world: Open-File Report 2003-107, Geological Survey (U.S.), Menlo Park, California.

   Online Links:

   • <http://mrdata.usgs.gov/sedcu/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -180

   East_Bounding_Coordinate: 180

   North_Bounding_Coordinate: 90

   South_Bounding_Coordinate: -60

3. What does it look like?

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

   Calendar_Date: Apr-2003

   Currentness_Reference: publication and revision dates

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 (785)

   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?

   main

   General descriptive information about the deposit

   rec_id

   Record ID.

   A distinct numerical identifier for the database record without further scientific significance. Integer values. Int of width 4.

   Range of values
   Minimum:	1
   Maximum:	785
   Resolution:	1

   depname

   Deposit name.

   The most recent deposit name. Textual values of no more than 34 characters.

   altname

   Other names.

   Alternative names that have been used for the deposit. Textual values of no more than 46 characters.

   Value	Definition
   (no value)	Information not available for this record. 708 records have no value for altname.

   includes

   Includes.

   The names of deposits that have been combined with the primary deposit as a result of the two-kilometer minimum separation rule. Textual values of no more than 67 characters.

   Value	Definition
   (no value)	Information not available for this record. 722 records have no value for includes.

   cntrycd

   Country code.

   Coded abbreviation combining the country and state or province. Textual values of no more than 5 characters.

   latdeg

   Latitude degrees.

   Degrees of latitude. Integer values. Int of width 3.

   Range of values
   Minimum:	-39
   Maximum:	73
   Units:	degrees
   Resolution:	1

   latmin

   Latitude minutes.

   Minutes of latitude. Integer values. Int of width 2.

   Value	Definition
   (no value)	Information not available for this record. 2 records have no value for latmin.

   Range of values
   Minimum:	-59
   Maximum:	59
   Units:	minutes
   Resolution:	1

   latsec

   Latitude seconds.

   Seconds of latitude. Integer values. Int of width 2.

   Value	Definition
   (no value)	Information not available for this record. 291 records have no value for latsec.

   Range of values
   Minimum:	-59
   Maximum:	60
   Units:	seconds
   Resolution:	1

   londeg

   Longitude degrees.

   Degrees of lontitude. Integer values. Int of width 4.

   Range of values
   Minimum:	-142
   Maximum:	147
   Units:	degrees
   Resolution:	1

   lonmin

   Longitude minutes.

   Minutes of longitude. Integer values. Int of width 2.

   Value	Definition
   (no value)	Information not available for this record. 3 records have no value for lonmin.

   Range of values
   Minimum:	-59
   Maximum:	59
   Units:	minutes
   Resolution:	1

   lonsec

   Longitude seconds.

   Seconds of longitude. Integer values. Int of width 2.

   Value	Definition
   (no value)	Information not available for this record. 300 records have no value for lonsec.

   Range of values
   Minimum:	-59
   Maximum:	57
   Units:	seconds
   Resolution:	1

   oreton

   Ore tonnage.

   Total tons of ore based on total production, reserves, and resources at the lowest possible cutoff grade, in millions of metric tons. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 644 records have no value for oreton.

   Range of values
   Minimum:	0.12
   Maximum:	2600
   Units:	million metric tons

   cugrd

   Copper grade.

   Average grade of copper for the deposit, as percent of metal in ore. Zero value means the grade (always for byproducts) was unavailable. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 644 records have no value for cugrd.

   Range of values
   Minimum:	0.15
   Maximum:	13
   Units:	percent

   cogrd

   Cobalt grade.

   Average grade of cobalt for the deposit, as percent of metal in ore. Zero value means the grade (always for byproducts) was unavailable. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 767 records have no value for cogrd.

   Range of values
   Minimum:	0.07
   Maximum:	1.07
   Units:	percent

   aggrd

   Silver grade.

   Average grade of silver for the deposit, as grams per metric ton of ore. Zero value means the grade (always for byproducts) was unavailable. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 744 records have no value for aggrd.

   Range of values
   Minimum:	0.3
   Maximum:	266
   Units:	grams per metric ton

   country

   Country.

   Name of the country where the deposit occurs. Textual values of no more than 28 characters.

   stprov

   State or province.

   State or province, if known, where the deposit occurs. Textual values of no more than 21 characters.

   Value	Definition
   (no value)	Information not available for this record. 327 records have no value for stprov.

   deptype

   Type of deposit.

   Classification of the deposit. Textual values of no more than 17 characters.

   hostrock

   Host rock.

   Type of rocks hosting the ore body, in the same terms used in published maps and reports. Textual values of no more than 83 characters.

   Value	Definition
   (no value)	Information not available for this record. 42 records have no value for hostrock.

   rockunder

   Rock underlying.

   Type of rocks underlying the host rock, forming the footwall. Textual values of no more than 73 characters.

   Value	Definition
   (no value)	Information not available for this record. 687 records have no value for rockunder.

   depage

   Age of deposit.

   Age of the deposit expressed using standard divisions of geologic time or in millions of years, when available. Textual values of no more than 35 characters.

   Value	Definition
   (no value)	Information not available for this record. 6 records have no value for depage.

   agemy

   Age.

   Age of the deposit in millions of years before the present based on reported absolute (typically thermal dates) ages or midpoints of geologic time scale units. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 7 records have no value for agemy.

   Range of values
   Minimum:	1
   Maximum:	2400
   Units:	million years

   rockover

   Rock overlying.

   Type of rocks overlying the host rock. Textual values of no more than 61 characters.

   Value	Definition
   (no value)	Information not available for this record. 714 records have no value for rockover.

   assoctype

   Associated Types.

   Supplementary information about the deposit type. Textual values of no more than 74 characters.

   Value	Definition
   (no value)	Information not available for this record. 616 records have no value for assoctype.

   comments

   Comments.

   Supplementary information. Textual values of no more than 212 characters.

   Value	Definition
   (no value)	Information not available for this record. 438 records have no value for comments.

   geolunit

   Geologic unit.

   Geologic unit code, a number matching polygons in XXXXXX. Textual values of no more than 49 characters.

   Value	Definition
   (no value)	Information not available for this record. 187 records have no value for geolunit.

   geolprov

   Geologic province.

   Name of the geologic province in which the deposit formed. Textual values of no more than 22 characters.

   Value	Definition
   (no value)	Information not available for this record. 592 records have no value for geolprov.

   latitude

   Latitude.

   Geographic latitude in decimal degrees, datum WGS84. South is negative, north positive. Real numbers stored in double precision.

   Range of values
   Minimum:	-39.2166666666667
   Maximum:	73.8
   Units:	decimal degrees

   longitude

   Longitude.

   Geographic longitude in decimal degrees, datum WGS84. West is negative, east positive. Real numbers stored in double precision.

   Range of values
   Minimum:	-142.866666666667
   Maximum:	147.5
   Units:	decimal degrees

   cuton

   Copper tonnage.

   Total tons of contained copper based on total production, reserves, and resources at the lowest possible cutoff grade, in millions of metric tons. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 644 records have no value for cuton.

   Range of values
   Minimum:	0.00136
   Maximum:	52
   Units:	million metric tons

   continent

   Continent.

   Coded abbreviation for the continent. Textual values of no more than 2 characters.

   minerals

   Mineralogy of the deposit as reported in scientific literature

   rec_id

   Record ID.

   Numerical identifier for the deposit, matches a value in main:rec_id. Integer values. Int of width 4.

   Range of values
   Minimum:	1
   Maximum:	785
   Resolution:	1

   value

   Mineralogy.

   Name of minerals reported as present in the deposit, without regard for their abundance. Most rock-forming minerals, such as feldspar, calcite, and quartz, are not included. Some variants of rock forming minerals that may be related to mineralization or alteration, such as Ag calcite, are included. Textual values of no more than 71 characters.

   tracemin

   Trace minerals of the deposit as reported in scientific literature

   rec_id

   Record ID.

   Numerical identifier for the deposit, matches a value in main:rec_id. Integer values. Int of width 4.

   Range of values
   Minimum:	1
   Maximum:	785
   Resolution:	1

   value

   Mineralogy.

   Name of trace minerals reported as present in the deposit, without regard for their abundance. Most rock-forming minerals, such as feldspar, calcite, and quartz, are not included. Some variants of rock forming minerals that may be related to mineralization or alteration, such as Ag calcite, are included. Textual values of no more than 76 characters.

   ref

   Scientific literature consulted by the authors to characterize the deposit

   rec_id

   Record ID.

   Numerical identifier for the deposit, matches a value in main:rec_id. Integer values. Int of width 4.

   Range of values
   Minimum:	1
   Maximum:	785
   Resolution:	1

   value

   References.

   Papers and web sites that were used to describe the deposit. In a few cases unpublished sources were used. Textual values of no more than 444 characters.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Cox, Dennis P.
   • Lindsey, David A.
   • Singer, Donald A.
   • Diggles, Michael F.

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   Dennis P Cox
   USGS WR SW GD
   Volunteer
   345 Middlefield Road$Mail Stop 901
   Menlo Park, CA 94025
   USA
   

   650-329-5328 (voice)
   650-329-5491 (FAX)
   dcox@usgs.gov
   

Why was the data set created?

National and global scale mineral resource assessments require information of this nature about specific types of mineral deposits

How was the data set created?

1. From what previous works were the data drawn?

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

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

   Cox, Dennis P., Lindsey, David A., Singer, Donald A., and Diggles, Michael F., 2003, Sediment-hosted copper deposits of the world: Deposit models and database: Open-File Report 2003-107, Geological Survey (U.S.), Menlo Park, California.

   Online Links:

   • <http://pubs.usgs.gov/of/2003/of03-107/>

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

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 80255-0046
   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 03-107

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?
   • Availability in digital form:

     Data format:	Mineral deposit characteristics in format Shapefile (version 1.0)
     Network links:	<http://mrdata.usgs.gov/sedcu/sedcu.zip>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 11-May-2010

Metadata author:

Peter N Schweitzer
USGS ER GD
Geologist
12201 Sunrise Valley Drive
Reston, VA 20192-0002
USA

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

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)