USGS Home
Contact USGS
Search USGS

Mineral Resources > Online Spatial Data

Mineral resource data for Mississippi Valley-Type and clastic-dominated sediment-hosted lead-zinc deposits

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?

   Taylor, Ryan D., Leach, David L., Bradley, Dwight C., and Pisarevsky, Sergei A., 2009, Mineral resource data for Mississippi Valley-Type and clastic-dominated sediment-hosted lead-zinc deposits: Open-File Report 2009-1297, Geological Survey (U.S.), Denver, Colorado.

   Online Links:

   • <http://mrdata.usgs.gov/sedexmvt/>
   • <http://pubs.usgs.gov/of/2009/1297/>

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -163.21

   East_Bounding_Coordinate: 148.42

   North_Bounding_Coordinate: 83.08

   South_Bounding_Coordinate: -34.88

3. What does it look like?

   <http://mrdata.usgs.gov/catalog/images/OFR_2009-1297.png> (PNG)

   Global distribution of these data from the web map interface, (768 x 384 pixels)

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

   Calendar_Date: 2009

   Currentness_Reference: 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 (240)

   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, assigned by the data manager of mrdata.usgs.gov. Integer values. Int of width 4.

   Range of values
   Minimum:	1
   Maximum:	240
   Resolution:	1

   district

   District.

   Name of the mining district. Textual values of no more than 24 characters.

   Value	Definition
   (no value)	Information not available for this record. 126 records have no value for district.

   depname

   Deposit.

   Most commonly used name of the deposit. Textual values of no more than 27 characters.

   country

   Country.

   Country in which the deposit is located. Textual values of no more than 26 characters.

   latitude

   Latitude.

   Geographic latitude of the deposit, in decimal degrees WGS84, south latitude negative. Real numbers stored in double precision.

   Range of values
   Minimum:	-34.88
   Maximum:	83.08
   Units:	decimal degrees

   longitude

   Longitude.

   Geographic longitude of the deposit, in decimal degrees WGS84, west longitude negative. Real numbers stored in double precision.

   Range of values
   Minimum:	-163.21
   Maximum:	148.42
   Units:	decimal degrees

   deptype

   Classification.

   General classification of the deposit as MVT (Mississippi Valley Type), CD (clastic-dominated), or UN (unclassified). Textual values of no more than 3 characters.

   alttype

   Alternative Classification.

   Any alternative classification commonly given for the deposit, includes BHT (Broken Hill type), carbonate-hosted/replacement, or sh (shale) or cc (coarse clastic). Textual values of no more than 23 characters.

   Value	Definition
   (no value)	Information not available for this record. 230 records have no value for alttype.

   tectset

   Tectonic Setting.

   Generalized tectonic setting: PM (passive margin), BA (back arc basin), CS (continental sag), RF (rift), or UN (unclassified). Textual values of no more than 2 characters.

   Value	Definition
   (no value)	Information not available for this record. 128 records have no value for tectset.

   hostrock

   Host Rocks.

   Lithology of the host rock. Textual values of no more than 89 characters.

   oreton

   Size (tonnage).

   Deposit size given in million metric tons of ore. Real numbers stored in double precision.

   Range of values
   Minimum:	0.01
   Maximum:	394
   Units:	million metric tons

   pbton

   Pb (tonnage).

   Tonnage of lead. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 10 records have no value for pbton.

   Range of values
   Minimum:	0
   Maximum:	28
   Units:	million metric tons

   znton

   Zn (tonnage).

   Tonnage of zinc. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 10 records have no value for znton.

   Range of values
   Minimum:	0
   Maximum:	27.39
   Units:	million metric tons

   pbznton

   Pb+Zn (tonnage).

   Tonnage of lead and zinc combined. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 1 records have no value for pbznton.

   Range of values
   Minimum:	0.002096
   Maximum:	51.8
   Units:	million metric tons

   pbgrd

   Pb grade.

   Lead grade. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 28 records have no value for pbgrd.

   Range of values
   Minimum:	0.18
   Maximum:	13
   Units:	percent of metal in

   zngrd

   Zn grade.

   Zinc grade. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 11 records have no value for zngrd.

   Range of values
   Minimum:	0.11
   Maximum:	24
   Units:	percent of metal in

   pbzngrd

   (Pb+Zn) grade.

   Combined grade of lead and zinc. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 1 records have no value for pbzngrd.

   Range of values
   Minimum:	0.43
   Maximum:	26.1
   Units:	percent of metal in

   cugrd

   Cu grade.

   Copper grade. Real numbers stored in double precision.

   Value	Definition
   (no value)	Information not available for this record. 211 records have no value for cugrd.

   Range of values
   Minimum:	0.09
   Maximum:	4.39
   Units:	percent of metal in

   aggrd

   Ag grade.

   Silver grade. Textual values of no more than 5 characters.

   Value	Definition
   (no value)	Information not available for this record. 135 records have no value for aggrd.

   othercom

   Other Commodities.

   Other commodities present at the site. Textual values of no more than 17 characters.

   Value	Definition
   (no value)	Information not available for this record. 231 records have no value for othercom.

   refgen

   General References.

   Short citations for general references. Textual values of no more than 169 characters.

   refprod

   Production or Reserves References.

   Short citations for references related to production and reserves. Textual values of no more than 64 characters.

   hostage

   Host-Rock Age.

   Age of the host rocks. Textual values of no more than 31 characters.

   minagemeth

   Mineralization Age and Method.

   Mineralization ages, with the method of determining age in parentheses after each estimate. Textual values of no more than 84 characters.

   Value	Definition
   (no value)	Information not available for this record. 177 records have no value for minagemeth.

   refage

   Age Reference.

   Short citations for references documenting the geologic age of the deposit. Textual values of no more than 79 characters.

   Value	Definition
   (no value)	Information not available for this record. 177 records have no value for refage.

   deptypea

   Deposit type A.

   Classification of the deposit as given in Leach and others (2005). Textual values of no more than 5 characters.

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

   deptypeb

   Deposit type B.

   Classification of the deposit as given in Leach and others (2005). Textual values of no more than 12 characters.

   Value	Definition
   (no value)	Information not available for this record. 95 records have no value for deptypeb.

   deptypec

   Deposit type C.

   Classification of the deposit as given in Leach and others (2005). Textual values of no more than 12 characters.

   Value	Definition
   (no value)	Information not available for this record. 206 records have no value for deptypec.

   reference

   References categorized by topic

   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:	240
   Resolution:	1

   field

   Category.

   Category to which the reference applies, one of "general", "production", or "age". Textual values of no more than 10 characters.

   reference

   Bibliographic reference.

   Bibliographic reference drawn from the printed report. Textual values of no more than 480 characters.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Taylor, Ryan D.
   • Leach, David L.
   • Bradley, Dwight C.
   • Pisarevsky, Sergei A.

2. Who also contributed to the data set?

3. To whom should users address questions about the data?
   David L Leach
   USGS CR RM GD
   Scientist Emeritus
   Box 25046$Denver Federal Center$Mail Stop 973
   Denver, CO 80225-0046
   USA
   

   303-236-5522 (voice)
   303-236-3200 (FAX)
   dleach@usgs.gov
   

Why was the data set created?

These mineral deposit resource data are important for exploration targeting and mineral resource assessments. There is significant variability in the resource data for these deposit types, and ore controls vary from one region to another.

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?

   Singer, Donald A., Berger, Vladimir I., and Moring, Barry C., 2009, Sediment-hosted zinc-lead deposits of the world: Open-File Report 2009-1252, Geological Survey (U.S.), Menlo Park, California.

   Online Links:

   • <http://mrdata.usgs.gov/sedznpb/>
   • <http://pubs.usgs.gov/of/2009/1252/>

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 2009-1297

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:	Deposit locations and characteristics in format Shapefile (version 1.0)
     Network links:	<http://mrdata.usgs.gov/sedexmvt/sedexmvt.zip>

   • Cost to order the data: none

Who wrote the metadata?

Dates:

Last modified: 11-Jan-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)