Carbonatites of the world, explored deposits of Nb and REE

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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: https://mrdata.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
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
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: https://mrdata.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: 0.04
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: 1.0
Format_Information_Content: Deposit locations with geologic and economic characteristics
File_Decompression_Technique: unzip
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Digital_Form:
Digital_Transfer_Information:
Format_Name: WMS
Format_Version_Number: 1.3.0
Format_Information_Content: Deposit locations with geological and economic characteristics
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
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:
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20161207
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N Schweitzer
Contact_Organization: USGS Eastern Mineral and Environmental Resources 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

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