Mine detail: Portovelo Gold Mines

Previously called 'Cima'

Location:	El Oro, Ecuador, South America
Lat / long:	-3.63962, -79.58925
dep_id:	10068846
mrds_id:	W002104
Commodity type:	metallic
Major mineral:	Zinc, Gold, Lead
Minor mineral:	Copper, Silver
Trace mineral:	Cadmium
Operation type:	Unknown
Deposit type:	Vein
Production size:	Production occurred
Development status:	Producer
ore:	Argentite, Bornite, Chalcocite, Chalcopyrite, Galena, Pyrite, Pyrrhotite, Sphalerite
gangue:	Calcite, Gypsum, Quartz
orebody_fm:	NARROW, PARALLEL
work_type:	Underground
alteration:	Propylitization, Silicification; 30 Cm Clay-Sericite Alteration Envelopes; Some Secondary Hematite.
conc_proc:	Mesothermal/Epithermal
ore_ctrl:	N-S Fracture/Fissure Systems At Portovelo/Minas Nuevas
Reporter:	Irving, Earl M., Lopez, Tony
hrock_unit:	Celica Formation;;
hrock_type:	Volcanic Rock (Aphanitic)
Structure:	Portovelo-Pinas Nw-Se Fault
Year first produced:	1549
disc_yr:	1549
prod_yrs:	1878-1971
discr:	Captain Mercadillo
References:	Deposit:: UNDP, 1969, GOLD AND BASE METAL SULPHIDES-PORTOVELO, REPORT NO. 2 Deposit:: BILLINGSLEY, P. 19-26, ZARUMA GOLD DISTRICT, AIMME, VOL. 74, P. 255-275 Deposit:: PALADINES, P.A., SAN MARTIN, D.H., AND SUAREZ, L.H., 1980, MAPA METALOGENICO DE LA REPUBLICA DEL ECUADOR: MINISTERIO DE RECURSOS NATURALES Y ENERGETICOS, SCALE 1:1,000,000. Deposit:: MINISTERIO DE RECURSOS NATURALES Y ENERGETICOS, 1982, MAPA GEOLOGICO NACIONAL DE LA REPUBLICA DEL ECUADOR, SCALE 1:1,000,000. Deposit:: GOOSSENS, P.J., FOZZARD, P.M., AND MOSQUERA, C.C., 1969, MINERAL INDEX MAP REPUBLIC OF ECUADOR: NACIONAL DE GEOLOGIA Y MINERA, MINISTERIO DE INDUSTRIAS Y COMERCIO, QUITO, ECUADOR, SCALE 1:1,000,000. Deposit:: INEMIN INSTITUTO ECUATORIANO MINERALIA, 1987, MAPA CATASTRAL MINERO ECUATORIANO. Deposit:: GEMUTS, I., LOPEZ, G., AND JIMENEZ, F., 1992, GOLD DEPOSITS OF SOUTHERN ECUADOR, SOCIETY OF ECONOMIC GEOLOGISTS NEWSLETTER, NO. 11, OCT. 92, PP. 14-16. Deposit:: STOLL, W.C., 1962, NOTES ON THE MINERAL RESOURCES OF ECUADOR, ECON. GEOL., 57(5), P. 799-808. Deposit:: PUIG, C.A., 1984, ECUADOR LOOKING TO MINING INCOME TO SUPPLEMENT OIL REVENUES, ENGINEERING AND MINING JOURNAL, 185, P. 85,89,92. Deposit:: THOURNOUT, VAN AND MERLYN, M., 1990, NUEVO MODELO METALOGENICO EN PORTOVELO, MINERIA ECUATORIANA, NO. 2, P. 17-19. Deposit:: GUSIAMANO, A.J., 1982, ESTUDIO MINERALOGICO DE PORTOVELO, FLYSCH, NO. 3, P. 95-128. Deposit:: 1964 UNDP Deposit:: MANY AT MINE. UNDP REPORTS AT UN, NY OF LIMITED DISTRIBUTION Deposit:: 1968 UNDP, REPORT ON NEGATIVE RESULTS Production:: UNDP, ECUADOR, REPORT NO 2, 1969 Reserve-Resource:: UNDP, ECUADOR, REPORT NO. 2, 1969