| Deposit ID | 10068865 |
|---|---|
| MRDS ID | W002134 |
| Record type | Site |
| Current site name | Northeastern Brazil Ta-Nb |
| Geographic coordinates: | -36.49888, -6.26472 (WGS84) |
|---|
Political divisions (FIPS codes)
Rio Grande Do Norte(province)
Brazil(country)
South America(continent)
Land(continent)
| Country | State |
|---|---|
| Brazil | Rio Grande Do Norte |
| Commodity | Importance |
|---|---|
| Tantalum Critical | Primary |
| Lithium Critical | Primary |
| Beryllium Critical | Primary |
| Materials | Type of material |
|---|---|
| Beryl | Ore |
| Spodumene | Ore |
| Tantalite | Ore |
| Host or associated | Host | ||
|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||
| |||
| (1) | -36.49888, -6.26472 |
|---|
| Development status | Producer |
|---|---|
| Commodity type | Metallic |
| Significant | No |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W002134 |
WRITTEN COMMUNICATION FROM M.G. WHITE
| Subject category | Comment text |
|---|---|
| Deposit | ABOUT 24 LARGE PEGMATITES EXHIBIT DIFFERENTIAL CRYSTALIZATION AND ARE OF ECONOMIC IMPORTANCE. THE OUTCROPS ARE LENTICULAR AND LARGEST ONES MEASURE 500 METERS BY 100 METERS. THERE ARE 4 MINERAL ZONES IN THE PEGMATITES, EACH ZONE HAVING A CERTAIN MINERAL ASSEMBLAGE. ZONE 1 A THIN OUTERMOST LAYER HAVING LARGE BIOTITE CRYSTALS. ZONE 2 THE THICKEST ZONE CONTAINS LARGE CRYSTALS OF FELDSPAR, MUSCOVITE AND QUARTZ. ZONE 3 HAS MOSTLY LARGE FELDSPAR CRYSTALS AND CONTAIN MOST OF THE TANTALITE, BERYL, COLUMBITE AND LITHIUM MINERALS. ZONE 4, THE CORE REGION OF THE PEGMATITE HAS LARGE MASSES OF QUARTZ AND SOME CRYSTALS OF BERYL. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1974 | Warfle, Thomas M. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.