Porphyry copper prospect in Sonora, Mexico

Names and other identifiers

Alternate names El Nublado, Pichacho Dos
Tract name Western Mexican Basin and Range and Laramide Southwest (003pCu3006x)
Site status prospect

Geographic location

Country Mexico
State or province Sonora
Geographic location -110.72345632, 29.183313506
Geologic map unit -110.72345632, 29.183313506
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range ~80–35 Ma(?) (Laramide orogeny(?))
Age reference geologic inference
Minerals Cu-oxides, powellite, scheelite
Tectonic setting continental margin
Stratigraphic age Late Cretaceous–Paleocene–Eocene(?)

Commodity and development information

Development status Occurrence
Minor commodities Mo, Cu
Gold-Moly ratio -9999

Reference information

Comments Part of Yale Resources 2,620-hectare La Verde Project that on 6 contiguous exploration concessions (Yale Resources Ltd., 2008). Tentatively classified as a porphyry system based on geology (Lukas Zürcher, oral commun., 2008). Epidote-garnet tactite with scheelite, powellite, and oxide copper minerals. Development: W-bearing tactite discovered in the district in 1943. Three claims recorded: El Nublado, El Picacho, and La Florencia. Minor development (shallow pit),but no tungsten ore mined; gold produced at El Picacho and La Florencia. Geology: NW-strinking belt of discontinuous tactite outcropus surrounded by metalimestone and hornfel, probably underliain by granite. Granite crops out 200 m W of the limestone, separated from it by silicified volcanic breccia in contact with limestone along a pre-intrusive fault.
Study area name Mexico
References Peña-Leal and others (1999); University of Arizona (1999); Yale Resources Ltd. (2008)
Site reference Hammarstrom and others (2010)
Peña-Leal, J.L., Zamora-Tovar, R.E., Núñez-Othón, Aristeo, and Orantes-Contreras, Vladimir, 1999, Carta geológico-minera, Hermosillo H12-8, Sonora [Mexico]: Pachuca, Hidalgo, Servicio Geológico Mexicano, 1 sheet, scale 1:250,000.
University of Arizona-Industry-USGS Mexico Consortium, 1999, March 1999 release notes: University of Arizona-Industry-USGS Mexico Consortium (unpub. report).
Yale Resources Ltd., 2008, La Verde project: Yale Resources Ltd. Web page accessed December 29, 2008, at http://www.yaleresources.com/s/LaVerde.asp.