Metadata: Identification_Information: Citation: Citation_Information: Originator: Singer, Donald A. Originator: Berger, Vladimir I. Originator: Moring, Barry C. Publication_Date: 2008 Title: Porphyry copper deposits of the world Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1155 Publication_Information: Publication_Place: Menlo Park, California Publisher: Geological Survey (U.S.) Online_Linkage: https://doi.org/10.3133/ofr20081155 Online_Linkage: https://mrdata.usgs.gov/porcu/ Description: Abstract: Information on porphyry copper deposits from around the world with grade and tonnage models, a general classification based on geologic setting, mineralogy, with data allowing locations of these deposits to be plotted using GIS. Purpose: Support regional to national scale mineral resource assessment Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -160.666944 East_Bounding_Coordinate: 178.178333 North_Bounding_Coordinate: 67.866667 South_Bounding_Coordinate: -48.075 Keywords: 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: comma-delimited text Theme_Keyword: DBF Theme_Keyword: HTML table Theme_Keyword: KML Theme_Keyword: shapefile Theme_Keyword: tab-delimited text Theme: Theme_Keyword_Thesaurus: Mineral Resources Data System commodity types Theme_Keyword: Copper Theme_Keyword: Gold Theme_Keyword: Molybdenum Theme_Keyword: Silver Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: copper Theme_Keyword: economic geology Theme_Keyword: geospatial datasets Theme_Keyword: gold Theme_Keyword: mathematical modeling Theme_Keyword: metallic ores Theme_Keyword: molybdenum Theme_Keyword: natural resource assessment Theme_Keyword: ore formation Theme_Keyword: Plutonic rocks Theme_Keyword: silver Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Access_Constraints: none Use_Constraints: none Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Donald A Singer Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road Mail Stop 901 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5370 Contact_Electronic_Mail_Address: dsinger@usgs.gov Data_Quality_Information: Logical_Consistency_Report: An important consideration at the data gathering stage is the question of what the sampling unit should be. Grade and tonnage data are available to varying degrees for districts, deposits, mines, and shafts. For the deposits in this file, the following rule was used to determine which ore bodies were combined. All mineralized rock or alteration within two (2) kilometers was combined into one deposit. Thus if the alteration zones of two deposits are within two kilometers of each other, they were combined. Such an operational spatial rule is necessary for defining deposits because we must be able to classify deposits in regions with highly variable geologic information and to avoid bias in estimating undiscovered deposits in resource assessments in areas where detailed information is lacking such as under cover. The two-kilometer rule was developed to try to insure that deposits in grade and tonnage and spatial density models correspond to deposits as geologic entities. Rules such as the two-kilometer rule applied here are essential in order to have an internally consistent assessment system where the estimate of number of undiscovered deposits is consistent with the grade and tonnage model. For example, El Pachon in Argentina and Los Pelambres in Chile are here reported as one record (deposit) because of the two-kilometer rule. Completeness_Report: This collection includes only well explored deposits for which there is sufficient information to contribute to constructing deposit models for this type of deposit and for distinguishing subtypes. This collection excludes, therefore, known occurrences that might be of this type, but for which important information is not available. With its focus on deposits, formally defined, this compilation excludes occurrences that cannot be expected to have economic potential. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Singer, Donald A. Originator: Berger, Vladimir I. Originator: Moring, Barry C. Publication_Date: 2002 Title: Porphyry copper deposits of the world: database, maps, and preliminary analysis Series_Information: Series_Name: Open-File Report Issue_Identification: 2002-268 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: DOI: 10.3133/ofr02268 Online_Linkage: https://pubs.usgs.gov/of/2002/0268/ Type_of_Source_Media: Digital data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: USGS OFR-2002-268 Source_Contribution: This is a previous major version of the present database. Source_Information: Source_Citation: Citation_Information: Originator: Singer, Donald A. Originator: Berger, Vladimir Iosifovich Originator: Moring, Barry C. Publication_Date: 2005 Title: Porphyry copper deposits of the world: database, map, and grade and tonnage models Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1060 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: DOI: 10.3133/ofr20051060 Online_Linkage: https://pubs.usgs.gov/of/2005/1060/ Type_of_Source_Media: Digital data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: USGS OFR-2005-1060 Source_Contribution: This is a previous major version of the present database. Process_Step: Process_Description: This report is an update of earlier publications about porphyry copper deposits (Singer, Berger, and Moring, 2002; Singer, D.A., Berger, V.I., and Moring, B.C., 2005). The update was necessary because of new information about substantial increases in resources in some deposits and because we revised locations of some deposits so that they are consistent with images in GoogleEarth. In this report we have added new porphyry copper deposits and removed a few incorrectly classed deposits. In addition, some errors have been corrected and a number of deposits have had some information, such as grades, tonnages, locations, or ages revised. Colleagues have helped identify places where improvements were needed. Source_Used_Citation_Abbreviation: USGS OFR-2002-268 Source_Used_Citation_Abbreviation: USGS OFR-2005-1060 Process_Date: 2008 Process_Step: Process_Description: Modified location given in record 260 (El Cobre, Cuba) to the inundated pit where mining occurred in the past. Thanks to Mr. Mario J. Faz, P.G., of Miami Florida for finding and alerting us to this problem. Process_Date: 20111212 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 690 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: main Entity_Type_Definition: General descriptive information about the deposit Entity_Type_Definition_Source: this dataset Attribute: Attribute_Label: rec_id Attribute_Definition: 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 690 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: depname Attribute_Definition: Deposit name. The most recent deposit name. Textual values of no more than 36 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Unrepresentable_Domain: Textual values of no more than 36 characters. Attribute: Attribute_Label: includes Attribute_Definition: 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 58 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 614 records have no value for includes. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: altname Attribute_Definition: Other names. Alternative names that have been used for the deposit. Textual values of no more than 154 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 525 records have no value for altname. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: country Attribute_Definition: Country. Name of the country where the deposit occurs. Textual values of no more than 18 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Unrepresentable_Domain: Textual values of no more than 18 characters. Attribute: Attribute_Label: cntrycd Attribute_Definition: Country code. Coded abbreviation combining the country and state or province. Textual values of no more than 4 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Country codes for USGS OFR-2008-1155 Codeset_Source: https://pubs.usgs.gov/of/2008/1155/data/country_codes.xls Attribute: Attribute_Label: stprov Attribute_Definition: State or province. State or province, if known, where the deposit occurs. Textual values of no more than 40 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 233 records have no value for stprov. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: latitude Attribute_Definition: Latitude. Geographic latitude in decimal degrees, datum WGS84. South is negative, north positive. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -48.075 Range_Domain_Maximum: 67.8666666666667 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: longitude Attribute_Definition: Longitude. Geographic longitude in decimal degrees, datum WGS84. West is negative, east positive. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -160.666944444444 Range_Domain_Maximum: 178.178333333333 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: agemy Attribute_Definition: 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 60 records have no value for agemy. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 3234 Attribute_Units_of_Measure: million years Attribute: Attribute_Label: depage Attribute_Definition: Deposit age. Textual values of no more than 67 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 97 records have no value for depage. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: oreton Attribute_Definition: 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 267 records have no value for oreton. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 21277 Attribute_Units_of_Measure: million metric tons Attribute: Attribute_Label: cugrd Attribute_Definition: 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1.8 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: mogrd Attribute_Definition: Molybdenum grade. Average grade of molybdenum 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 1 records have no value for mogrd. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0.1 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: augrd Attribute_Definition: Gold grade. Average grade of gold 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1.3 Attribute_Units_of_Measure: grams per metric ton Attribute: Attribute_Label: aggrd Attribute_Definition: 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. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 21 Attribute_Units_of_Measure: grams per metric ton Attribute: Attribute_Label: deptype Attribute_Definition: Type of deposit. Classification of the deposit using a system new to this report using the observed rocks reported in maps rather than characteristics that are frequently unobservable in yet-to-be discovered deposits. Textual values of no more than 3 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Cox and Singer (1986) Codeset_Source: https://doi.org/10.3133/b1693 Attribute: Attribute_Label: empldepth Attribute_Definition: Emplacement depth. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 3 records have no value for empldepth. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 7.5 Attribute_Units_of_Measure: km Attribute: Attribute_Label: dep5km10km Attribute_Definition: Other deposits between 5km and 10km. Listing of other deposits by type that are between 5 and 10 km of the subject deposit. Each deposit type is coded as the deposit-type number and deposit type as listed in USGS Bulletins 1693 (Cox and Singer, 1986) and 2004 (Bliss, 1992). Textual values of no more than 37 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 460 records have no value for dep5km10km. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: dep5km Attribute_Definition: Other deposits within 5km. Listing of other deposits by type that are within 5 km of the subject deposit. Each deposit type is coded as the deposit-type number and deposit type as listed in USGS Bulletins 1693 (Cox and Singer, 1986) and 2004 (Bliss, 1992). Textual values of no more than 59 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 352 records have no value for dep5km. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: dep_id Attribute_Definition: Deposit ID. Integer values. Int of width 8. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 710 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: latdeg Attribute_Definition: Latitude degrees. Degrees of latitude. Integer values. Int of width 3. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -48 Range_Domain_Maximum: 67 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: latmin Attribute_Definition: Latitude minutes. Minutes of latitude. Integer values. Int of width 2. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -59 Range_Domain_Maximum: 59 Attribute_Units_of_Measure: minutes Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: latsec Attribute_Definition: Latitude seconds. Seconds of latitude. Integer values. Int of width 2. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 355 records have no value for latsec. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -58 Range_Domain_Maximum: 59 Attribute_Units_of_Measure: seconds Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: londeg Attribute_Definition: Longitude degrees. Degrees of lontitude. Integer values. Int of width 4. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -160 Range_Domain_Maximum: 178 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: lonmin Attribute_Definition: Longitude minutes. Minutes of longitude. Integer values. Int of width 2. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -59 Range_Domain_Maximum: 59 Attribute_Units_of_Measure: minutes Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: lonsec Attribute_Definition: Longitude seconds. Seconds of longitude. Integer values. Int of width 2. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 365 records have no value for lonsec. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -59 Range_Domain_Maximum: 59 Attribute_Units_of_Measure: seconds Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: rockdep Attribute_Definition: Rocks in deposit. Textual values of no more than 204 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 45 records have no value for rockdep. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: rockmap Attribute_Definition: Rocks on map. Textual values of no more than 184 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 408 records have no value for rockmap. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: rockmapdep Attribute_Definition: Rocks on map in deposit. Textual values of no more than 213 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 19 records have no value for rockmapdep. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: discdate Attribute_Definition: Discovery date. Date the deposit was discovered, where this is known. Textual values of no more than 35 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 306 records have no value for discdate. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: startdate Attribute_Definition: Startup date. Date mining of the deposit began, if this is know. Textual values of no more than 19 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 553 records have no value for startdate. Enumerated_Domain_Value_Definition_Source: this dataset Attribute: Attribute_Label: ore_a Attribute_Definition: Ore A-axis. Length in km of the major axis of the ellipse that best fits the shape of the ore body projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 17 records have no value for ore_a. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 303 Attribute_Units_of_Measure: km Attribute: Attribute_Label: ore_b Attribute_Definition: Ore BA-axis. Length in km of the minor axis of the ellipse that best fits the shape of the ore body projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 11 records have no value for ore_b. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 3 Attribute_Units_of_Measure: km Attribute: Attribute_Label: ore_area Attribute_Definition: Ore Area. Area in sq km of the ellipse that best fits the shape of the ore body projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 11 records have no value for ore_area. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 28 Attribute_Units_of_Measure: sq km Attribute: Attribute_Label: alter_a Attribute_Definition: Alteration A-axis. Length in km of the major axis of the ellipse that best fits the shape of the alteration zone projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 10 records have no value for alter_a. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 25 Attribute_Units_of_Measure: km Attribute: Attribute_Label: alter_b Attribute_Definition: Alteration B-axis. Length in km of the minor axis of the ellipse that best fits the shape of the alteration zone projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 10 records have no value for alter_b. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 9 Attribute_Units_of_Measure: km Attribute: Attribute_Label: alter_area Attribute_Definition: Alteration area. Area in sq km of the ellipse that best fits the shape of the alteration zone projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 10 records have no value for alter_area. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 82 Attribute_Units_of_Measure: sq km Attribute: Attribute_Label: sulf_a Attribute_Definition: Sulfide A-axis. Length in km of the major axis of the ellipse that best fits the shape of the sulfide occurrence zone projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 10 records have no value for sulf_a. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 13 Attribute_Units_of_Measure: km Attribute: Attribute_Label: sulf_b Attribute_Definition: Sulfide B-axis. Length in km of the minor axis of the ellipse that best fits the shape of the sulfide occurrence zone projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 10 records have no value for sulf_b. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 7 Attribute_Units_of_Measure: km Attribute: Attribute_Label: sulf_area Attribute_Definition: Sulfide area. Area in sq km of the ellipse that best fits the shape of the sulfide occurrence zone projected in two dimensions to the surface. Real numbers stored in double precision. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 10 records have no value for sulf_area. Enumerated_Domain_Value_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 89 Attribute_Units_of_Measure: sq km Attribute: Attribute_Label: comments Attribute_Definition: Comments. Supplementary information. Textual values of no more than 255 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 203 records have no value for comments. Enumerated_Domain_Value_Definition_Source: this dataset Detailed_Description: Entity_Type: Entity_Type_Label: minerals Entity_Type_Definition: Mineralogy of the deposit as reported in scientific literature Entity_Type_Definition_Source: this dataset Attribute: Attribute_Label: rec_id Attribute_Definition: Record ID. Numerical identifier for the deposit, matches a value in main:rec_id. Integer values. Int of width 4. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 690 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: value Attribute_Definition: 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 44 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Unrepresentable_Domain: Textual values of no more than 44 characters. Detailed_Description: Entity_Type: Entity_Type_Label: ref Entity_Type_Definition: Scientific literature consulted by the authors to characterize the deposit Entity_Type_Definition_Source: this dataset Attribute: Attribute_Label: rec_id Attribute_Definition: Record ID. Numerical identifier for the deposit, matches a value in main:rec_id. Integer values. Int of width 4. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 690 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: value Attribute_Definition: 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 255 characters. Attribute_Definition_Source: this dataset Attribute_Domain_Values: Unrepresentable_Domain: Textual values of no more than 255 characters. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Geology, Energy, and Minerals Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 12201 Sunrise Valley Drive 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 Resource_Description: USGS Open File Report 2008-1155 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: Shapefile Format_Version_Number: 1.0 Format_Information_Content: Simple shapefile with a URL to the full report of each location, with all attributes as accompanying CSV files File_Decompression_Technique: unzip Transfer_Size: 0.25 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://mrdata.usgs.gov/porcu/porcu-csv.zip Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: 1.0 Format_Information_Content: Simple shapefile with a URL to the full report of each location, with all attributes as accompanying CSV files File_Decompression_Technique: unzip Transfer_Size: 0.25 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://mrdata.usgs.gov/porcu/porcu-csv.zip Digital_Form: Digital_Transfer_Information: Format_Name: WMS Format_Version_Number: 1.3.0 Format_Information_Content: Deposit locations and characteristics Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://mrdata.usgs.gov/services/porcu?request=getcapabilities&service=WMS&version=1.3.0& Digital_Form: Digital_Transfer_Information: Format_Name: WFS Format_Version_Number: 1.0.0 Format_Information_Content: Deposit locations with minimal descriptive characteristics Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://mrdata.usgs.gov/wfs/porcu?request=getcapabilities&service=WFS&version=1.0.0& Fees: none Metadata_Reference_Information: Metadata_Date: 20210212 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Geology, Energy, and Minerals Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 12201 Sunrise Valley Drive 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 Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998