Mine detail: El Asiento Mine

Previously called ''

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Location

Lat / long:

-20.01287, -66.55363

Resource(M)

Primary:	Tin, Silver, Gold
Tertiary:	Zinc, Copper, Lead
Ore:	Cassiterite, Galena, Gold, Proustite, Sphalerite, Tetrahedrite
Gangue:	Alunite, Barite, Jarosite, Pyrite, Quartz

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
Production years:	1873-1911, 1934-1936

Geology

Host rock:	Llallagua;Cuzco
Host type:	Quartzite,Siltstone,Tuff,Quartz Latite
Structure:	N30-40w Syncline, Diatreme (Vent For Tuff), Quartz Latite Volcanic Dome Intruding Margin Of Diatreme
Alteration processes:	Alteration Zone 3 Km Long And 1.7 Km Wide Oriented Ne-Sw With Central Zones Of Sericitization And Disseminated Pyrite, Zoning Outward Through Argillic To Propylitic. Silicification Is Limited To Vein Selvages, Silurian Sediments, And Zones Of Argillic Alteration, Particularly In The Upper Part Of The Volcanic Dome. The Diatreme Is Stongly Propylitized.

References

MRDS	BL20307
DEP	10006312
Reference	{Deposit:: UNDP, 1989, EL ASIENTO: YACIMIENTOS DE METALES PRECIOSOS DE BAJA LEY Y GRAN VOLUMEN: PROYECTO BOL/87/12 FOLLETO TECNICO PROMOCIONAL, 14 P.}{Deposit:: ESPINOZA, O.A., 1989, INFORME GEOLOGICO MINERO DEL ASIENTO: MINTEC, INFORME INTERNO.}{Deposit:: GUSTAVSON ASSOC., 1992, COMPENDIUM OF THE ECONOMIC GEOLOGY OF BOLIVIA}{Deposit:: PINTO V., J., 1988, MODELO CONCEPTUAL Y EVALUACION DE METALES PRECIOSOS EL ASIENTO, POTOSI, BOLIVIA: UNDP PROYECTO BOL/87/012 INFORME INTERNO, 30 P.}{Deposit:: AHLFELD, F., AND SCHNEIDER-SCHERBINA, A., 1964, LOS YACIMIENTOS MINERALES Y DE HIDROCARBUROS DE BOLIVIA: DEPARTAMENTO NACIONAL DE GEOLOGIA BOLETIN 5, P. 297.}{Deposit:: UNITED NATIONS DEVELOPMENT PROGRAM STUDY 1988-1989 (PINTO, 1988; UNDP, 1989}{Other Database:: CIMRI}
Reporter	Guerra, Edwin, Long, Keith R.