| Deposit ID | 10255600 |
|---|---|
| MAS/MILS ID | 3350200057 |
| Record type | Site |
| Current site name | Bolsa Negra |
| Alternate or previous names | Nevada |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -67.7895, -16.53769 (WGS84) |
| Elevation | 4250 |
| Location accuracy | 500(meters) |
Political divisions (FIPS codes)
La Paz(province)
Bolivia(country)
South America(continent)
Land(continent)
| Country | State |
|---|---|
| Bolivia | La Paz |
| Commodity | Importance |
|---|---|
| Tungsten Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Arsenopyrite | Unknown |
| Barite | Unknown |
| Pyrrhotite | Unknown |
| Quartz | Unknown |
| Scheelite | Unknown |
| Sphalerite | Unknown |
| Wolframite | Unknown |
| Ore Body (1) | -67.7895, -16.53769 |
|---|
| Strike | N23E | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dip | 20W | ||||||||||||||||||||||
| Length | 800M | ||||||||||||||||||||||
| Width | 60M | ||||||||||||||||||||||
| |||||||||||||||||||||||
| Area | 1601HA | ||||||
|---|---|---|---|---|---|---|---|
| |||||||
| Operation type | Underground |
|---|---|
| Development status | Producer |
| Commodity type | Metallic |
| Significant | Yes |
| Mining method | Open Stope - Overhand |
| Year of first production | 1914 |
| Milling method | Gravity |
| District name | Mururata |
|---|
| Type of mineral rights | State Lease |
|---|---|
| Type of mineral rights | Minerals Only |
| Ownership category | State |
|---|
| Type | Owner |
|---|---|
| Owner | Comibal (Corp. Minera De Bolivia) |
| Interest | 100 |
| Home office | Bolivia |
| Year | 1982 |
| Type | Operator |
|---|---|
| Owner | Cooperative Minera De Bolsa Negra (A Lease By A Coop) |
| Interest | 100 |
| Home office | Bolivia |
| Year | 1992 |
| Type of workings | Underground | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 3350200057 |
ROSKILL INFORMATION SERVICES LTD., THE ECONOMICS OF TUNGSTEN
6'TH EDITION 1990. P 48.
AHLFELD, F., 1954, LOS YACIMIENTOS MINERALES DE BOLIVIA: BAN
MINERO DE BOLIVIA, LA PAZ, PG. 109-111, PRINTED IN BILBAO, S
IMPRENTA INDUSTRIAL S. A., IN SPANISH.
PEREIRA BASCOPE, G., 1968, INVESTIGACIONES PRELIM. SOBRE TEC
Y METALOGEN. EN LAS CORD. REAL Y QUIMSA CRUZ: SER. GEOL. DE
BOL. 9, LA PAZ, 99 PGS.
TUNGSTEN PRODUCT SPECIFICATIONS, PRIMARY TUNGSTEN
ASSOCIATION, LONDON.
PRIMARY TUNGSTEN ASSOCIATION, QUARTERLY BULLETINS 1977-1981.
| Subject category | Comment text |
|---|---|
| Deposit | MINE WAS MAJOR W PRODUCER IN WWI AND IS BEDDING REPLACEMENTS M THICK HORIZONTAL ZONE, INDIVIDUAL ORE SEAMS ARE 0.02 TO 0. WIDE, 26 LAYERS KNOWN, GRADE OF ORE LENSES IS 1 TO 2.5 PCT W DATA FROM AHLFELD, MINE 85 KM E OF LA PAZ. LOCATION FROM AHL MAP, 1954. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 17-APR-1995 | Rfb | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.