| Deposit ID | 10080340 |
|---|---|
| MRDS ID | W031460 |
| Record type | Site |
| Current site name | Bolsa Negra Mine |
| Alternate or previous names | Nevada Mine |
| Geographic coordinates: | -67.79367, -16.54602 (WGS84) |
|---|---|
| Elevation | 4290 |
| Relative position | 17 KM N 87 E OF PALCA |
Political divisions (FIPS codes)
La Paz(province)
Bolivia(country)
South America(continent)
Land(continent)
| Country | State |
|---|---|
| Bolivia | La Paz |
| Commodity | Importance |
|---|---|
| Tungsten Critical | Primary |
| Tin Critical | Secondary |
| Copper | Tertiary |
| Arsenic Critical | Tertiary |
| Bismuth Critical | Tertiary |
| Zinc Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Bismuthinite | Ore |
| Cassiterite | Ore |
| Chalcopyrite | Ore |
| Scheelite | Ore |
| Sphalerite | Ore |
| Wolframite | Ore |
| Barite | Gangue |
| Chlorite | Gangue |
| Fluorite | Gangue |
| Hematite | Gangue |
| Jarosite | Gangue |
| Limonite | Gangue |
| Muscovite | Gangue |
| Pyrite | Gangue |
| Pyrrhotite | Gangue |
| Quartz | Gangue |
| Siderite | Gangue |
| Tourmaline | Gangue |
| Model code | 46 |
|---|---|
| USGS model code | 15a |
| Deposit model name | W veins |
| Host or associated | Associated | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Rock type | Plutonic Rock > Mafic Intrusive Rock > Diorite | ||||||||||
| |||||||||||
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite |
| Rock unit name | Taquesi-Mururata Batholith |
| Rock description | Taquesi-Mururata Batholith |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Shale |
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Sandstone |
| Rock unit name | Unduavi Formation |
| Rock description | Unduavi Formation |
| (1) | -67.79367, -16.54602 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Doming Of Sediments Due To Intrusion Of Taquesi-Mururata Batholith |
| General form | BLANKET |
|---|---|
| Strike | N 50-60 E |
| Dip | 0-15 SE |
| Length | 1000M |
| Width | 60M |
| Development status | Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Large |
| Significant | No |
| Discovery year | 1914 |
| Discoverer | L. D. Rasley |
| Year of first production | 1919 |
| District name | Taquesi-Mururata |
|---|
| Type | Operator |
|---|---|
| Owner | Comibol ; Cooperativa Minera Bolsa Negra Limitada ) |
| First year | 1952 |
| Last year | 1965 |
| Type | Owner |
|---|---|
| Owner | Corporacion Minera De Bolivia (Comibol; 1952-) |
| Year | 1966 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | CON? | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| Description | Ap_Grade: ^72.18% Wo3 | ||||||||||||||
| |||||||||||||||
| Year | 1967 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | CON? | ||||||||||||||
| Accuracy | Accurate | ||||||||||||||
| Description | Ap_Grade: ^71.75% Wo3 | ||||||||||||||
| |||||||||||||||
| Year | 1968 |
|---|---|
| Material | CON? |
| Accuracy | Accurate |
| Description | Ap_Grade: ^69.50% Wo3 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W031460 |
AHLFELD, F., AND SCHNEIDER-SCHERBINA, A., 1964, LOS YACIMIENTOS MINERALES Y DE HIDROCARBUROS DE BOLIVIA: BOLIVIA DEPARTAMENTO NACIONAL DE GEOLOGIA BOL. 5, PP. 76-8.
WIELER, A., 1970, DESCRIPCION Y LEVANTAMIENTO GEOLOGICO DEL GRUPO MINERO BOLSA NEGRA, NO. SGG, 77/70-COMIBOL.
STOUGHTON, I., 1964, ESTUDIO SOBRE VETA NUEVA BOLSA NEGRA, INFORME NO. 1919-COMIBOL.
FUENTES, ?., 1969, ESTUDIO GEOLOGICO-ECONOMICO BOLSA NEGRA, NO. 2165-COMIBOL.
MINING MAGAZINE, JANUARY, 1987, P. 58.
WINKLEMAN, LOTHAR, 1983, GEOLOGIE UND LAGERSTATTEN IM BEREICH PALCA (MURURATA) UND DIE GEOCHEMIE DER SILURSEDIMENTITE IN DER CORDILLERA LA PAZ/BOLIVIEN: BERLINER GEOWISSENSCHAFTLICHE ABHANDLUNGEN, REIHE A, V. 51, 110 P.
GUSTAVSON ASSOC., 1993, COMPENDIUM OF THE ECONOMIC GEOLOGY OF BOLIVIA
CIMRI
GUSTAVSON ASSOC. (1992)
| Subject category | Comment text |
|---|---|
| Deposit | FIVE MANTOS, 0.02-0.5 M WIDE, IN ALTERED COUNTRY ROCKS 1200 M SOUTH OF THE CONTACT ZONE OF THE TAQUESI-MURURATA BATHOLITH. TRUE THICKNESS OF MINERALIZED ZONE IS 40 M. |
| Deposit | NUMEROUS MINERALIZED VEINS OCCUR IN THE COUNTRY ROCKS ON BOTH SLOPES OF THE CERRO NEGRO RIDGE. WOLFRAMITE QUARTZ VEINS IN THE DISTRICT OCCUR WITH CASSIFERITE AND SPHALERITE MINERALIZATION IN SEVERAL LOCALITIES. SEVERAL VEIN SYSTEMS ARE PRESENT: A GROUP WEST OF THE RIDGE AXIS NEAR LAICACOLLO HILL AS DESIGNATED "FLORES", "AGUIRRE" AND "CANO". A SECOND SYSTEMS KNOWN AS "TRES HERMANOS" OUTCROPS WITH STRIKE N45W, DIP 75NE. THE SAN JUAN MINE, NE OF THE RIDGE, CONTAINS CASSITERITE VEINS. VEINS EXTEND UP TO 1000 METERS IN LENGTH WITH THICKNESS 10 TO 50 CMS. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-JUN-1978 | Urquidi-Barrau, Fernando | Department of State | |
| Updater | 01-AUG-1981 | Ericksen, George E. (Rowe, William D.) | U.S. Geological Survey | |
| Updater | 01-DEC-1993 | Long, Keith R. | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.