GMRAP ID | 3039 |
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Alternate names | El Nublado, Pichacho Dos |
Tract name | Western Mexican Basin and Range and Laramide Southwest (003pCu3006x) |
Site status | prospect |
Country | Mexico |
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State or province | Sonora |
Geographic location | -110.72345632, 29.183313506 |
Geologic map unit | -110.72345632, 29.183313506 |
Nearby data |
Deposit type | Porphyry copper |
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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(?) |
Development status | Occurrence |
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Minor commodities | Mo, Cu |
Gold-Moly ratio | -9999 |
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. |
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Study area name | Mexico |
References | Peña-Leal and others (1999); University of Arizona (1999); Yale Resources Ltd. (2008) |
Site reference | Hammarstrom and others (2010) |