Mine detail: Bolsa Negra Mine

Previously called 'Nevada Mine'

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Location

Lat / long:

-16.54602, -67.79367

Resource(M)

Primary:	Tungsten
Secondary:	Tin
Tertiary:	Copper, Arsenic, Bismuth, Zinc
Ore:	Bismuthinite, Cassiterite, Chalcopyrite, Scheelite, Sphalerite, Wolframite
Gangue:	Barite, Chlorite, Fluorite, Hematite, Jarosite, Limonite, Muscovite, Pyrite, Pyrrhotite, Quartz, Siderite, Tourmaline
Orebody form:	BLANKET
Discovery year:	1914

Production

Operation type:	Unknown
Production size:	Medium
Development status:	Producer
First production started:	1919

Geology

Host rock:	Unduavi Formation
Host type:	Shale,Sandstone
Associated rock:	Taquesi-Mururata Batholith
Associated type:	Diorite,Granite
Structure:	Doming Of Sediments Due To Intrusion Of Taquesi-Mururata Batholith
Alteration processes:	Narrow, Irregular Muscovite-Chlorite Selvages Around Stockwork Veins; Host Rock Hornfelsed (Chlorite-Muscovite-Tourmaline-Carbonate)

References

MRDS	W031460
DEP	10080340
Reference	{Deposit:: 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.}{Deposit:: GRANT, J.N., ET. AL., 1979, K-AR AGES OF IGNEOUS ROCKS AND MINERALIZATION IN PART OF THE BOLIVIAN TIN BELT: ECON. GEOL., V. 74, P. 838-851.}{Deposit:: WIELER, A., 1970, DESCRIPCION Y LEVANTAMIENTO GEOLOGICO DEL GRUPO MINERO BOLSA NEGRA, NO. SGG, 77/70-COMIBOL.}{Deposit:: STOUGHTON, I., 1964, ESTUDIO SOBRE VETA NUEVA BOLSA NEGRA, INFORME NO. 1919-COMIBOL.}{Deposit:: FUENTES, ?., 1969, ESTUDIO GEOLOGICO-ECONOMICO BOLSA NEGRA, NO. 2165-COMIBOL.}{Deposit:: MINING MAGAZINE, JANUARY, 1987, P. 58.}{Deposit:: 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.}{Deposit:: GUSTAVSON ASSOC., 1993, COMPENDIUM OF THE ECONOMIC GEOLOGY OF BOLIVIA}{Deposit:: MCBRIDE, S.L., AND OTHERS, 1983, MAGMATIC AND METALLOGENIC EPISODES IN THE NORTHERN TIN BELT, CORDILLERA REAL, BOLITIA: GEOLOGISCHE RUNDSCHAU, V. 72, N. 2, P. 685-713.}{Other Database:: CIMRI}{Production:: GUSTAVSON ASSOC. (1992)}
Reporter	Ericksen, George E. (Rowe, William D.), Long, Keith R., Urquidi-Barrau, Fernando