Mine detail: El Silencio Mine

Previously called 'MantaFrontino Gold Mines Ltd. Veins: Main Vein'

Location:	Antioquia, Colombia, South America
Lat / long:	7.10123, -74.68302
dep_id:	10068462
mrds_id:	W001523
Commodity type:	metallic
Major mineral:	Gold, Silver
Minor mineral:	Copper, Zinc, Lead
Operation type:	Unknown
Production size:	Medium ammount of material produced
Development status:	Producer
ore:	Chalcopyrite, Galena, Gold, Pyrite, Pyrrhotite, Scheelite, Sphalerite
gangue:	Calcite, Quartz
orebody_fm:	TABULAR
work_type:	Underground
alteration:	Silicification, Considerable Pyrite
conc_proc:	Mesothermal Vein In Igneous Host
ore_ctrl:	Major Shear Zone Probably Multiply Reopened During Mineralization.
Reporter:	Irving, Earl M., Schruben, Paul G., Learned, Robert, Page, Norman J.
hrock_type:	Gneiss,Sandstone,Conglomerate
arock_unit:	Segovia Batholith
arock_type:	Diorite,Dacite
Structure:	Central Cordillera; N-S, Major Shear Zone With Branches
Year first produced:	1825
dy_ba:	<
disc_yr:	1825
discr:	Compania De Frontino Y Bolivia S.A. (British)
References:	Deposit:: WOKITTEL, R., COLOMBIA NAT. GEOL. SERV., TOMOX, 1960. Deposit:: FEININGER, BARRERO, CASTRO, RAMIREZ AND OTHERS, 1970, MAPA GEOLOGICO DEL ORIENTE DEL DEPTO. DE ANTIOQUIA, INST. NAC. DE INVEST. GEOL-MINES, COLUMBIA. Deposit:: E/MJ INTL. DIR. Deposit:: RODRIGUEZ, C.J., AND PERNETT, A., 1983, RECURSOS MINERALES DE ANTIOQUIA, BOL. GEOL. INGEOMINAS, V. 26, NO. 3, P. 116, BOGOTA. Deposit:: HALL, R., ET AL, 1970, RECURSOS MINERALES DE PARTE DE ANTIOQUIA Y CALDAS, BOL. GEOL. V. 18, NO. 2, BOGOTA. Deposit:: OQUENDO, E., 1970, OCCURRENCIAS MINERALES DE ZARAGOZA, SEGOVIA Y REMEDIOS, INF. 1574, INGEOMINAS, BOGOTA. Deposit:: LOZANO, H., Y PULIDO, O.H., 1983, METALES PRECIOSOS - ORO, IN RECURSOS MINERALES DE COLOMBIA, 2ND ED., PUB. GEOL. ESP. NO. 1, INGEOMINAS, BOGOTA. Deposit:: U.S. EMBASSY, BOGOTA, 1993, 1992 MINERALS REPORT- COLOMBIA: DEPARTMENT OF STATE CABLE, 7/93. Deposit:: SINGEWALD, Q.D., 1950, MINERAL RESOURCES OF COLOMBIA (OTHER THAN PETROLEUM): U.S. GEOLOGICAL SURVEY BULLETIN 964-B, P. 53-204. Deposit:: INTERNATIONAL MINERALS CORPORATION, (N.D.), PRIVATE REPORTS: INTERNATIONAL MINERALS CORPORATION, NEW YORK. Deposit:: 1950 COMPILE SINGEWALD, Q., USGS BULL. 964B. Deposit:: 1960 COMPILE WOKITTEL, R., COL. NAT. GEOL. SURV., TOMOX Deposit:: 1971 COMPILE HALL, R.B., COLOMBIA BOL. GEOL. V Production:: U.S. EMBASSY, BOGOTA (1993). SINGEWALD (1950).