Metadata: Identification_Information: Citation: Citation_Information: Originator: Berger, Vladimir I. Originator: Singer, Donald A. Originator: Orris, Greta J. Title: Carbonatites of the world, explored deposits of Nb and REE Publication_Date: 2009 Series_Information: Series_Name: Open-File Report Issue_Identification: 2009-1139 Publication_Information: Publisher: Geological Survey (U.S.) Publication_Place: Menlo Park, California Online_Linkage: http://tin.er.usgs.gov/carbonatite/ Description: Abstract: Data on 60 of the 527 known carbonatites in the world, providing reliable quantitative data on ore tonnages and grades of niobium and REE. Purpose: Assist in the creation of descriptive and grade-tonnage models for mineral deposits to support a new national mineral resource assessment. The models used for such an assessment must be based on information that is available for undiscovered deposits, including lithology, age, structural features, and geophysical and geochemical anomalies that are visible on regional geologic maps rather than the detailed studies commonly carried out on deposits that are well known. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Currentness_Reference: revision date Status: Progress: Complete Maintenance_and_Update_Frequency: as needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -123.749167 East_Bounding_Coordinate: 127.1625 North_Bounding_Coordinate: 71.053611 South_Bounding_Coordinate: -30.884167 Access_Constraints: none Use_Constraints: none Keywords: Theme: Theme_Keyword_Thesaurus: General glossary for mineral resources spatial data Theme_Keyword: comma-delimited text Theme_Keyword: HTML table Theme_Keyword: KML Theme_Keyword: OGC WMS Theme_Keyword: shapefile Theme_Keyword: tab-delimited text Theme: Theme_Keyword_Thesaurus: Mineral Resources Data System commodity types Theme_Keyword: Niobium Theme_Keyword: rare earth elements Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: economic geology Theme_Keyword: geospatial analysis Theme_Keyword: geospatial datasets Theme_Keyword: metallic ores Theme_Keyword: metamorphic rocks Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Dan L Mosier 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: 650-329-5050 Contact_Electronic_Mail_Address: mosier@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://tin.er.usgs.gov/carbonatite/carbonatite-global.png Browse_Graphic_File_Description: Reduced-size image of the global distribution of deposits, (180 x 90 pixels) Browse_Graphic_File_Type: PNG Data_Quality_Information: Lineage: Process_Step: Process_Description: Modified oreton field for record 34 (Ruri, Kenya) to 0.375 Mt in consultation with database author. Process_Date: 20111207 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: 60 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: 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 Attribute: Attribute_Label: rec_id Attribute_Definition: Record ID. A distinct numerical identifier for the database record without further scientific significance. Integer values. Int of width 3. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 60 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: country Attribute_Definition: Country. Name of the country where the deposit occurs. Textual values of no more than 28 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: Attribute_Label: stprov Attribute_Definition: State or Province. State or province, if known, where the deposit occurs. Textual values of no more than 24 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 12 records have no value for stprov. Attribute: Attribute_Label: depname Attribute_Definition: Deposit name. The most recent deposit name. Textual values of no more than 16 characters. Attribute: Attribute_Label: altname Attribute_Definition: Other names. Alternative names that have been used for the deposit. Textual values of no more than 20 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 38 records have no value for altname. 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 16 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 58 records have no value for includes. 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_Domain_Values: Range_Domain: Range_Domain_Minimum: -30.8841666666667 Range_Domain_Maximum: 71.0536111111111 Attribute: Attribute_Label: latdeg Attribute_Definition: Latitude (degrees). Degrees of latitude. Integer values. Int of width 2. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -30 Range_Domain_Maximum: 71 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: latmin Attribute_Definition: Latitude (minutes). Minutes of latitude. Integer values. Int of width 2. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -59 Range_Domain_Maximum: 59 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: latsec Attribute_Definition: Latitude (seconds). Seconds of latitude. Integer values. Int of width 2. 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 latsec. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -58 Range_Domain_Maximum: 58 Attribute_Measurement_Resolution: 1 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_Domain_Values: Range_Domain: Range_Domain_Minimum: -123.749166666667 Range_Domain_Maximum: 127.1625 Attribute: Attribute_Label: londeg Attribute_Definition: Longitude (degrees). Degrees of lontitude. Integer values. Int of width 2. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -123 Range_Domain_Maximum: 127 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: lonmin Attribute_Definition: Longitude (minutes). Minutes of longitude. Integer values. Int of width 2. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -56 Range_Domain_Maximum: 58 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: lonsec Attribute_Definition: Longitude (seconds). Seconds of longitude. Integer values. Int of width 2. 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 lonsec. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -59 Range_Domain_Maximum: 57 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: discdate Attribute_Definition: Discovery date. Date the deposit was discovered. Textual values of no more than 11 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 27 records have no value for discdate. Attribute: Attribute_Label: startdate Attribute_Definition: Startup date. Date mining started. Textual values of no more than 18 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 38 records have no value for startdate. Attribute: Attribute_Label: mintype Attribute_Definition: Mineral type. Mineralogical subtype of the deposit, based on the dominant carbonate mineral composition and textural features. Textual values of no more than 41 characters. 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 mintype. Attribute: Attribute_Label: oreton Attribute_Definition: Tonnage. Tonnage based on the total production, reserves, and resources at the lowest possible cutoff grade, in millions of metric tons. Real numbers stored in double precision. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 5 records have no value for oreton. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.03 Range_Domain_Maximum: 2898 Attribute: Attribute_Label: deptype Attribute_Definition: Deposit subtype. Deposit type given in Cox and Singer (1986); all records have the value 10 for this field. Integer values. Int of width 2. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 10 Range_Domain_Maximum: 10 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: niobium Attribute_Definition: Niobium grade. Niobium oxide grade in percent of oxide in the ore. Real numbers stored in double precision. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 2.86 Attribute: Attribute_Label: ree Attribute_Definition: REE grade. Rare earth element oxide grade in percent of oxide in the ore. Real numbers stored in double precision. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 6.3 Attribute: Attribute_Label: p2o5 Attribute_Definition: P2O5 grade. Phosphorus grade as percent of oxide in the ore. Real numbers stored in double precision. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 25 Attribute: Attribute_Label: grade_src Attribute_Definition: Grades. Reference sources used to determine grade values. Textual values of no more than 181 characters. Attribute: Attribute_Label: depage Attribute_Definition: Age of deposit. Quantitative age determinations for the deposit, indicating the method used and material dated, where available. Textual values of no more than 68 characters. 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 depage. Attribute: Attribute_Label: agemy Attribute_Definition: Age (m.y.). Radiometric age reported in millions of years before the present based on measurements or midpoints of units from the geologic time scale. Real numbers stored in double precision. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 2047 Attribute: Attribute_Label: tectset Attribute_Definition: Tectonic setting. Type of tectonic unit hosting the deposit. Textual values of no more than 196 characters. Attribute: Attribute_Label: rocks Attribute_Definition: Rocks in deposit. Rock types within the deposit and not reported on regional maps. Textual values of no more than 149 characters. Attribute: Attribute_Label: rocksmap Attribute_Definition: Rocks on map. Country rocks recorded both in the deposits and on a regional map, along with the geologic age of the rocks. Textual values of no more than 126 characters. Attribute: Attribute_Label: ganguemin Attribute_Definition: Gangue minerals. Gangue minerals present in the deposit. Textual values of no more than 279 characters. Attribute: Attribute_Label: orebody_fm Attribute_Definition: Orebody form. General form of the carbonatite intrusion or alkali-carbonatite intrusive complex. Textual values of no more than 140 characters. Attribute: Attribute_Label: ore_a Attribute_Definition: Orebody A-axis. Long axis of the two-dimensional projection of the ore body onto the surface, in km. Real numbers stored in double precision. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 14 records have no value for ore_a. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 18 Attribute: Attribute_Label: ore_area Attribute_Definition: Orebody area. General size of the carbonatite intrusion or intrusive complex. Textual values of no more than 6 characters. 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 ore_area. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.3 Range_Domain_Maximum: 1327 Attribute: Attribute_Label: ore_b Attribute_Definition: Orebody B-axis. Short axis of the two-dimensional projection of the ore body onto the surface, in km. Textual values of no more than 5 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 14 records have no value for ore_b. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.3 Range_Domain_Maximum: 5.6 Attribute: Attribute_Label: alttype Attribute_Definition: Alteration type. Type of alteration present. Textual values of no more than 59 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 5 records have no value for alttype. Attribute: Attribute_Label: altwidth Attribute_Definition: Alteration zone width. Width of the alteration zone, in km. Real numbers stored in double precision. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 2.5 Attribute: Attribute_Label: dep5km Attribute_Definition: Deposits within 5km. Types of other mineral deposits found within 5km, values from Cox and Singer (1986). Textual values of no more than 22 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 37 records have no value for dep5km. Attribute: Attribute_Label: dep10km Attribute_Definition: Deposits within 10km. Types of other mineral deposits found between 5km and 10km away, values from Cox and Singer (1986). Textual values of no more than 16 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 56 records have no value for dep10km. Attribute: Attribute_Label: comments Attribute_Definition: Comments. Additional descriptive comments about the deposit. Textual values of no more than 1024 characters. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (no value) Enumerated_Domain_Value_Definition: Information not available for this record. 7 records have no value for comments. Detailed_Description: Entity_Type: Entity_Type_Label: minerals Entity_Type_Definition: Mineralogy of the deposit as reported in scientific literature Attribute: Attribute_Label: rec_id Attribute_Definition: Record ID. A distinct numerical identifier for the database record without further scientific significance. Integer values. Int of width 3. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 60 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 32 characters. Detailed_Description: Entity_Type: Entity_Type_Label: ref Entity_Type_Definition: Scientific literature consulted by the authors to characterize the deposit Attribute: Attribute_Label: rec_id Attribute_Definition: Record ID. A distinct numerical identifier for the database record without further scientific significance. Integer values. Int of width 3. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 60 Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: value Attribute_Definition: Reference. 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 400 characters. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Information Services Contact_Address: Address_Type: mailing Address: Box 25286, Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80255-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: 1-303-202-4695 Contact_Electronic_Mail_Address: infoservices@usgs.gov 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: Deposit locations with geologic and economic characteristics File_Decompression_Technique: unzip Transfer_Size: 44 kilobytes Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://tin.er.usgs.gov/carbonatite/carbonatite.zip Digital_Form: Digital_Transfer_Information: Format_Name: WMS Format_Version_Number: 1.1.1 Format_Information_Content: Deposit locations with geological and economic characteristics Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://mrdata.usgs.gov/services/carbonatite?request=GetCapabilities&service=WMS&version=1.1.1 Digital_Form: Digital_Transfer_Information: Format_Name: WFS Format_Version_Number: 1.0.0 Format_Information_Content: Deposit locations with geological and economic characteristics Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://mrdata.usgs.gov/services/carbonatite?request=GetCapabilities&service=WFS&version=1.0.0 Fees: none Metadata_Reference_Information: Metadata_Date: 20111207 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