| Deposit ID | 10068383 |
|---|---|
| MRDS ID | W001413 |
| Record type | Site |
| Current site name | Amapa Tin Placers |
| Geographic coordinates: | -51.54916, 0.75155 (WGS84) |
|---|
Political divisions (FIPS codes)
Amapa*(province)
Brazil(country)
South America(continent)
Land(continent)
| Country | State |
|---|---|
| Brazil | Amapa* |
| Commodity | Importance |
|---|---|
| Tin Critical | Primary |
| Tantalum Critical | Secondary |
| Niobium (Columbium) Critical | Secondary |
| Gold | Secondary |
| Diamond | Secondary |
| Materials | Type of material |
|---|---|
| Cassiterite | Ore |
| Gold | Ore |
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Plutonic Rock > Pegmatite | ||
| |||
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Metasedimentary Rock |
| (1) | -51.54916, 0.75155 |
|---|
| Development status | Producer |
|---|---|
| Commodity type | Both |
| Significant | No |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W001413 |
1. KLEPPER, M.R. AND DEQUECH, VITOR(1945)MINERAL DEPOSITS OF THE TERRITORY OF AMAPA, BRAZIL: ALLUVIAL GOLD, CASSITERITE AND COLUMBITE-TANTALITE IN THE AMAPARI RIVER REGION, U.S. GEOLOGICAL SURVEY OPEN FILE REPORT, WASH. D.C.
KLEPPER, M.R. AND DEQUECH, VITOR(1945),MINERAL DEPOSITS OF THE TERRITORY OF AMAPA, BRAZIL; GOLD, TANTALITE AND DIAMONDS NEAR VILA SANTA MARIA, U.S. GEOLOGICAL SURVEY, OPEN FILE REPORT, WASH. D.C.
DEQUECH, VITOR AND KLEPPER, M.R.(1946), ESTANHO, OURO , TANTALITA E DIAMANTES NO TERRITORIO DE AMAPA: DIV. DE FOMENTO DA PRODUCAO MINERAL, BOLETIM 79, P.89-113.
| Subject category | Comment text |
|---|---|
| Deposit | DISTRICT IS IN UPPER PORTION OF AMAPARI AND VILLA NOVA RIVER VALLEYS IN SOUTH CENTRAL AMAPA. CASSITERITE AND TANTALITE-COLUMBITE DERIVED FROM PEGMATITES AND GOLD FROM QUARTZ VEINS IN PRECAMBRIAN METASEDIMENTS. ORIGIN OF DIAMONDS NOT KNOWN. PLACERS OF REGION CONTAIN ONLY SMALL RESERVES NO MORE THAN 16 METRIC TONS CASSITERITE AND MUCH SMALLER RESERVES TANTALITE-COLUMBITE. SMALL PRODUCTION OF THESE IN 1940S. SPORADIC PRODUCTION GOLD AND DIAMONDS BY PIMITIVE PLACER MINING. IN 1972 CPRM CONDUCTED RECONNAISSANCE MINERAL SURVEY OF 70,000 SQUARE KILOMETERS OF THIS REGION AND THE CALCOENE RIVER REGION TO THE NORTH. REPORT NOT YET AVAILABLE(JAN.,1973). |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JAN-1973 | White, Max G. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.