National Mineral Resource Assessment 1998

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Title: National Mineral Resource Assessment 1998
Publication_Date: 2001
Series_Information:
Series_Name: Circular
Issue_Identification: 1178
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: https://mrdata.usgs.gov/nmra/
Description:
Abstract:
Estimates of the tonnages and amounts of contained metal in undiscovered deposits, mineral deposit types.
Purpose:
As the Nations population grows and its economy matures, greater attention is being paid to such issues as land use and environmental quality, as well as to sustainability of mineral supplies to provide for the needs of future generations. National Mineral Resource Assessments provide a framework for addressing these issues by monitoring the continuing depletion of the Nations nonrenewable mineral wealth and by contributing information required to manage resource extraction while minimizing consequent environmental effects. For responsible stewardship of the Nations lands and resources, it is important to know in which areas future mineral resources may be located and how much metal such resources might contain (McCammon and Briskey, 1992).
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1996
Currentness_Reference:
Publication date of the original report; subsequent reports elaborated and expanded on these results
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -179.14303704601
East_Bounding_Coordinate: -67.41278527303
North_Bounding_Coordinate: 71.3963032638234
South_Bounding_Coordinate: 28.9786952850653
Access_Constraints: none
Use_Constraints: none
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: Alexandria Digital Library Feature Type Thesaurus
Theme_Keyword: mineral deposit areas
Theme:
Theme_Keyword_Thesaurus: General glossary for mineral resources spatial data
Theme_Keyword: KML
Theme_Keyword: shapefile
Theme:
Theme_Keyword_Thesaurus: Mineral Resources Data System commodity types
Theme_Keyword: Copper
Theme_Keyword: Gold
Theme_Keyword: Lead
Theme_Keyword: Silver
Theme_Keyword: Zinc
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: copper
Theme_Keyword: economic geology
Theme_Keyword: geospatial datasets
Theme_Keyword: gold
Theme_Keyword: lead
Theme_Keyword: metallic mineral resources
Theme_Keyword: natural resource assessment
Theme_Keyword: silver
Theme_Keyword: zinc
Place:
Place_Keyword_Thesaurus: Common geographic areas thesaurus
Place_Keyword: fUS = United States
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N Schweitzer
Contact_Organization: MIDWEST REGION
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address:
Mail Stop 954
12201 Sunrise Valley Dr
City: Reston
State_or_Province: VA
Postal_Code: 20192-0002
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: https://mrdata.usgs.gov/nmra/nmra-example.png
Browse_Graphic_File_Description:
Reduced-size image of map interface showing permissive tracts for Hot spring Au deposits, (673 x 364 pixels)
Browse_Graphic_File_Type: PNG
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
These data are not observational but are interpretations made by the original authors, so accuracy must be judged by evaluating the source publications.

For consistency and simplicity, some attribute values were shortened; where the original indicated that no quantitative assessment was carried out for a tract, the values in this database are simply "NA".
Logical_Consistency_Report:
Assessed permissive tracts in Alaska were handled separately from those in the conterminous US even though in many cases the deposit models considered would have been the same. However users should assume that the concept envisioned in the deposit models for Alaskan tracts might differ in particulars from the concept used in the conterminous US.
Completeness_Report:
Hawaii was not assessed. In addition a number of tracts indicate that no quantitative assessment was made, even though the rationale information will indicate some of the thinking that went into the decision not to produce a quantitative estimate for those tracts.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
While these tracts are defined somewhat arbitrarily, their boundaries should be understood as broad approximations of the areas intended for assessment by the authors. In some cases it seems clear that the geometries digitized were much more precise than the assessors actually intended, so users should not assume any point close to a boundary has or does not have characteristics of the nearby polygon.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
The U.S. Geological Survey National Mineral Resource Assessment Team
Publication_Date: 2000
Title:
1998 Assessment of Undiscovered Deposits of Gold, Silver, Copper, Lead, and Zinc in the United States
Series_Information:
Series_Name: Circular
Issue_Identification: 1178
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/circ/c1178/
Type_of_Source_Media: digital files
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2000
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: cir1178
Source_Contribution:
Permissive tracts for the conterminous US with assessment information
Source_Information:
Source_Citation:
Citation_Information:
Originator:
U.S. Geological Survey National Mineral Resource Assessment Team
Originator: Schruben, Paul G. (compiler)
Publication_Date: 2002
Title:
Assessment of Undiscovered Deposits of Gold, Silver, Copper, Lead, and Zinc in the United States: A Portable Document (PDF) Recompilation of USGS Open-File Report 96-96 and Circular 1178
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2002-198
Publication_Information:
Publisher: U.S. Geological Survey
Publication_Place: Reston, Virginia
Online_Linkage: https://pubs.usgs.gov/of/2002/of02-198/
Type_of_Source_Media: digital files
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: ofr2002198
Source_Contribution: Permissive tracts for Alaska with assessment information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Ludington, S. D.
Originator: Cox, D. P.
Originator: McCammon, R. B.
Publication_Date: 1996
Title:
Data Base for a National Mineral-Resource Assessment of Undiscovered Deposits of Gold, Silver, Copper, Lead, and Zinc in the Conterminous United States
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 96-96
Publication_Information:
Publisher: U.S. Geological Survey
Publication_Place: Reston, Virginia
Online_Linkage: https://pubs.usgs.gov/of/1996/of96-096/
Type_of_Source_Media: digital files
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1996
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: ofr9696
Source_Contribution: Original report used for comparison
Process_Step:
Process_Description:
Permissive tracts were drawn from the previously published reports and entered into PostgreSQL relational database with PostGIS used to express the geometry. Additional web interfaces were developed to make it easier for people outside USGS to find, get, and use these data.
Process_Date: 2014
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 5769
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0001
Longitude_Resolution: 0.0001
Geographic_Coordinate_Units: decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: World Geodetic System 1984
Ellipsoid_Name: WGS 84
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: tract
Entity_Type_Definition: Estimates of the number of undiscovered deposits in each tract
Attribute:
Attribute_Label: tract
Attribute_Definition:
Coded identifier grouping polygons assessed for the same type of deposit in a given geographic region
Attribute_Domain_Values:
Unrepresentable_Domain:
Short texts combining a region abbreviation with a sequence number, purely to differentiate the tract from other tracts, without additional scientific significance.
Attribute:
Attribute_Label: layer
Attribute_Definition: Coded identifier abbreviating the deposit type
Attribute_Domain_Values:
Unrepresentable_Domain:
Short codes (4 or 5 letters and numbers) used to abbreviate the deposit types
Attribute:
Attribute_Label: dep_type
Attribute_Definition:
Type of mineral deposit for which the number of undiscovered deposits in the tract was estimated
Attribute_Domain_Values:
Unrepresentable_Domain:
Plain texts naming the deposit model used for the assessment; approximately matching the model title used in the published source (indicated by the dep_model field)
Attribute:
Attribute_Label: dep_model
Attribute_Definition:
Coded identifier used in Cox and Singer (1986) and related references to refer to the deposit type
Attribute_Domain_Values:
Unrepresentable_Domain:
Coded identifiers indicating the model used for the assessment; most refer to Cox and Singer (1986), some indicate two models using + as a conjunction, a few indicate other USGS publications
Attribute:
Attribute_Label: mark3_id
Attribute_Definition:
Coded identifier for the deposit type used by the MARK3 mineral assessment software
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: MARK3 model identifiers
Codeset_Source: https://pubs.usgs.gov/of/1998/0356/report.pdf
Attribute:
Attribute_Label: age
Attribute_Definition:
General chronostratigraphic age in which mineralization is anticipated to have occurred
Attribute_Domain_Values:
Unrepresentable_Domain:
Geologic time periods or ranges expressed as the names of chronostratigraphic units.
Attribute:
Attribute_Label: region
Attribute_Definition: General geographic region in which the tract is located
Attribute_Domain_Values:
Unrepresentable_Domain:
Names indicating generalized geographic regions which are described more precisely in USGS Circular 1178
Attribute:
Attribute_Label: state
Attribute_Definition:
States in which the tract is primarily located (space-separated list of values)
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: 2-letter postal abbreviations for US states
Codeset_Source: USPS
Attribute:
Attribute_Label: p_90
Attribute_Definition:
Estimated number of undiscovered deposits in the tract, with 90% confidence
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 80
Attribute_Units_of_Measure: deposits
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: na
Enumerated_Domain_Value_Definition: No quantitative assessment of the tract was made.
Attribute:
Attribute_Label: p_50
Attribute_Definition:
Estimated number of undiscovered deposits in the tract, with 50% confidence
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 600
Attribute_Units_of_Measure: deposits
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: na
Enumerated_Domain_Value_Definition: No quantitative assessment of the tract was made.
Attribute:
Attribute_Label: p_10
Attribute_Definition:
Estimated number of undiscovered deposits in the tract, with 10% confidence
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 800
Attribute_Units_of_Measure: deposits
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: na
Enumerated_Domain_Value_Definition: No quantitative assessment of the tract was made.
Attribute:
Attribute_Label: p_05
Attribute_Definition:
0 Estimated number of undiscovered deposits in the tract, with 5% confidence
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 800
Attribute_Units_of_Measure: deposits
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: na
Enumerated_Domain_Value_Definition: No quantitative assessment of the tract was made.
Attribute:
Attribute_Label: p_01
Attribute_Definition:
Estimated number of undiscovered deposits in the tract, with 1% confidence
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 800
Attribute_Units_of_Measure: deposits
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: na
Enumerated_Domain_Value_Definition: No quantitative assessment of the tract was made.
Attribute:
Attribute_Label: p_0
Attribute_Definition:
Estimated probability that there are no undiscovered deposits of the specified type in this tract
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.15
Range_Domain_Maximum: 0.99
Attribute_Units_of_Measure: probability in percent
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: na
Enumerated_Domain_Value_Definition: No quantitative assessment of the tract was made.
Attribute:
Attribute_Label: estimators
Attribute_Definition:
Names of the scientists who provided the estimates of undiscovered deposits
Attribute_Domain_Values:
Unrepresentable_Domain:
Last names of members of the assessment team, in comma-separated lists. Some names include a first initial to clarify the identity of the estimator.
Attribute:
Attribute_Label: area_km2
Attribute_Definition: Total area of the tract, in square kilometers
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 29
Range_Domain_Maximum: 702400
Attribute_Units_of_Measure: square kilometers
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Schweitzer, Peter, N
Contact_Organization: Eastern Mineral Resources Team
Contact_Address:
Address_Type: mailing address
Address: 12201 Sunrise Valley Drive Mail Stop 954
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Resource_Description: Circular 1178 with data from OFR 02-198
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: WMS
Format_Version_Number: 1.1,1
Format_Information_Content:
Permissive tracts for deposit types containing copper, silver, gold, lead, and zinc with estimates of the number of undiscovered deposits in each tract.
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Shapefile
Format_Version_Number: 1.0
Format_Information_Content:
Permissive tracts for mineral deposits containing copper, gold, silver, lead, and zinc in the continental US and Alaska, by deposit type with estimates of the number of undiscovered deposits of each type.
Transfer_Size: 7.1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://mrdata.usgs.gov/nmra/nmra.zip
Digital_Form:
Digital_Transfer_Information:
Format_Name: KML
Format_Version_Number: 2.2
Format_Information_Content:
Permissive tracts for mineral deposits containing copper, gold, silver, lead, and zinc in the continental US and Alaska, by deposit type with estimates of the number of undiscovered deposits of each type.
Transfer_Size: 5.5
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20170111
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Schweitzer, Peter, N
Contact_Organization: Eastern Mineral Resources Team
Contact_Address:
Address_Type: mailing address
Address: 12201 Sunrise Valley Drive Mail Stop 954
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://mrdata.usgs.gov/metadata/nmra.html>
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