The Central African Republic Diamond Database (2018)

Identification_Information:

Citation:

Citation_Information:

Originator: Peter G. Chirico
Originator: Jessica D. DeWitt
Originator: Sarah E. Bergstresser
Publication_Date: 2018
Title:

The Central African Republic Diamond Database (2018) - Surficial Geology

Geospatial_Data_Presentation_Form: ESRI feature class (polygon) data
Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P9NFPUEO
Larger_Work_Citation:

Citation_Information:

Originator:

DeWitt, Jessica D., Chirico, Peter G., Bergstresser, Sarah E., and Clark, Inga E.

Publication_Date: 2018
Title:

The Central African Republic Diamond Database – A Geodatabase of Archival Diamond Occurrences and Areas of Recent Artisanal and Small-scale Diamond Mining

Geospatial_Data_Presentation_Form: GIS dataset
Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Description:

Abstract:

This GIS raster dataset describes the spatial extent of quaternary surficial geology in the Central African Republic (CAR). A national-scale geologic dataset published by Lescuyer and Milesi (2004) was digitized and modified to provide country-scale geospatial context for the geomorphologic terrain elements, which are the focus of investigations regarding alluvial and fluvial placer diamond deposits.

Purpose:

The polygons in this dataset provide country-scale geologic context for the geomorphologic terrain elements, which are the focus of investigations regarding alluvial and fluvial placer diamond deposits.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2018

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 14.765624995817
East_Bounding_Coordinate: 27.421874995312
North_Bounding_Coordinate: 11.048608926563
South_Bounding_Coordinate: 2.8548257978545

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: bedrock geologic units

Place:

Place_Keyword_Thesaurus: CommonGeographicAreas
Place_Keyword: Central African Republic

Access_Constraints: none
Use_Constraints:

Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Peter G. Chirico
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical
Address: 12201 Sunrise Valley Dr.
City: Reston
State_or_Province: VA
Postal_Code: 2019
Country: USA

Contact_Voice_Telephone: 703-648-6950
Contact_Electronic_Mail_Address: pchirico@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted

Logical_Consistency_Report: No formal logical accuracy tests were conducted
Completeness_Report:

Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: No formal positional accuracy tests were conducted

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report: No formal positional accuracy tests were conducted

Lineage:

Process_Step:

Process_Description:

Mapped geologic data presented in conference proceedings was digitized and adapted for use in this study. The full citation of this data source is: Lescuyer, J.L., and Milési, J.P., 2004, Africa GIS and SIGAfrique network – Geological and metallogenic information system, tools for sustainable development: France, 20éme Colloque de Géologie Africaine.

Process_Date: 2017

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 1.0
Longitude_Resolution: 1.0
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WVG_1984
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Surficial_Geology
Entity_Type_Definition: attribute table for Surficial_geology GIS polygons
Entity_Type_Definition_Source: unknown

Attribute:

Attribute_Label: USGS_ATT
Attribute_Definition:

USGS attribute describing the major geochronologic epoch of each bedrock unit.

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain:

Eoarchean, Paleoarchean, Mesoarchean, Neoarchean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic, Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, Paleogene-eogene, Quaternary

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Peter G. Chirico
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical
Address: 12201 Sunrise Valley Dr.
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA

Contact_Voice_Telephone: 703-648-6950
Contact_Electronic_Mail_Address: pchirico@usgs.gov

Distribution_Liability:

Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.

Technical_Prerequisites:

This dataset is formatted as a feature class in a ESRI geodatabase. It requires the user to have geospatial software such as ESRI ArcGIS, Blue Marble Global Mapper, Que GIS, GRASS, or other GIS software

Metadata_Reference_Information:

Metadata_Date: 20180409
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Jessica DeWitt
Contact_Organization: U.S. Geologic Survey

Contact_Address:

Address_Type: mailing and physical
Address: 12201 Sunrise Valley Dr.
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA

Contact_Voice_Telephone: 703-648-6926
Contact_Electronic_Mail_Address: jdewitt@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

The Central African Republic Diamond Database (2018) - Surficial Geology

Metadata: