Cumay

Porphyry copper prospect in Zamora-Chinchipe, Ecuador

Names and other identifiers

GMRAP ID 234
Alternate names Nambija Norte
Tract name Colombia-Ecuador-Peru Jurassic San Carlos (005pCu1003)
Site status prospect

Geographic location

Country Ecuador
State or province Zamora-Chinchipe
Geographic location -78.883333333, -4.016666667
Geologic map unit -78.883333333, -4.016666667
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 141Ma
Age determination method unknown
Age range 141 ±5 Ma
Age reference Singer and others (2008)
Minerals actinolite, albite, biotite, bornite, carbonate, chalcocite, chalcopyrite, chlorite, clay minerals, covellite, epidote, galena, garnet, hematite, magnetite, malachite, molybdenite, prehnite, pyrite, pyrrhotite, rutile, sericite, sphalerite, tetrahedrite/tennantite
Associated rocks andesite dike, aplite, diorite, gabbro diorite, quartz monzonite porphyry, skarn, alaskite, andesite, andesitic dacite, dacite, dacite porphyry, diorite, granodiorite, latite, limestone, marble, quartz monzonite, quartzite, trachyte
Tectonic setting continental margin
Stratigraphic age Early Cretaceous

Commodity and development information

Development status Unknown
Gold-Moly ratio -9999

Reference information

Study area name Andes
References Markowski and others (2006); PRODEMINCA (2000a); PRODEMINCA (2000b); Quevedo and Lowell (2001); Singer and others (2008)
Site reference Cunningham and others (2008)
Markowski, Agnès; Vallance, Jean; Chiaradia, Massimo; and Fontboté, LluÌs, 2006, Mineral zoning and gold occurrence in the Fortuna skarn mine, Nambija district, Ecuador: Mineralium Deposita, v. 41, p. 301–321. (Also available at http://dx.doi.org/10.1007%2Fs00126-006-0062-x.)
PRODEMINCA, 2000a, Evaluacion distritos mineros del Ecuador—Depositos porfidicos y epi-mesotermales relacionados con intrusiones de las Cordilleras Occidental y Real: Ministerio de Energia y Minas, Subsecretaria de Minas, Direccion Nacional de Geologia, Proyecto de Desarrolo Minero y Control Ambiental (PRODEMINCA), v. 5, 223 p.
PRODEMINCA, 2000b, Manual de exploracion de depositos metaliferos en el Ecuador: Ministerio de Energia y Minas, Subsecretaria de Minas, Direccion Nacional de Geologia, Proyecto de Desarrolo Minero y Control Ambiental (PRODEMINCA), 100 p.
Quevedo, L., and Lowell, J.D., 2001, Cinturón de pórfidos de cobre de Zamora, Ecuador: II Congress of Prospectors and Explorers, ProExplo 2001, Lima, Peru, 20 p., accessed 2008, at http://www.proexplo.com.pe/encont/opcion/e2001.htm. [Web page no longer available.]
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.