Porphyry copper deposit in Chihuahua, Mexico

Names and other identifiers

Tract name Western Sierra Madre Occidental and Laramide Central (003pCu3007x)
Group name Bahuerachi
Included sites Main Zone Porphyry, South Goat Porphyry, North Porphyry Lobe
Site status deposit

Geographic location

Country Mexico
State or province Chihuahua
Geographic location -108.121252336, 27.015060529
Geologic map unit -108.121252336, 27.015060529
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 65.7Ma
Age determination method unknown
Age range 65.7 Ma
Age reference Singer and others (2008)
Minerals anhydrite, azurite/malachite, chalcopyrite, Cu-oxides, galena, molybdenite, pyrite, sphalerite
Associated rocks dacitic porphyry intrusion, granite-granodiorite, andesite, conglomerate, limestone, marble
Tectonic setting continental margin
Stratigraphic age Late Cretaceous–Paleocene

Commodity and development information

Development status Prospect
Major commodities Cu
Minor commodities Au, Ag
Tonnage (Mt) 605Mt
Cu grade (%) 0.393%
Mo grade (%) 0.008%
Au grade (g/t) 0.032g/t
Ag grade (g/t) 3.91g/t
Contained copper 2,380,000t
Gold-Moly ratio 4

Reference information

Comments Exposed. Pre-development in 2008 (open-pit). Location based on UTM in Tyler Resources reports. Main body is a 4 km long dacitic mineralized porphyry, structurally dismembered into 3 lobes representing different paleodepths. Drilled 2004 to 2007 by Tyler Resources for resource estimate. Intrusive complex (multiple phases, dioritic/andesite to rhyolitic) exposed in an erosional window through Late Tertiary volcanic rocks. Measured, indicated and inferred resources at 0.2% Cu cutoff. 88% of measured resources in quartz feldspar porphyry; high-grade skarns also present. Bahuerachi Project property (6,488 hectares) includes Main Zone Porphyry, South Goat Porphyry, North Porphyry Lobe, skarn targets, veins, and distal epithermal systems. Alteration: none.
Study area name Mexico
References Independent Mining Consultants (2007); Jutras and McCandlish (2006); Minjárez-Sosa and others (2002); Tyler Resources Inc. (2006); Tyler Resources Inc. (2007); U.S. Geological Survey (2007); Singer and others (2008)
Site reference Hammarstrom and others (2010)
Independent Mining Consultants, Inc., 2007, Bahuerachi project - Preliminary Economic Assessment report, Chihuahua, Mexico: Tyler Resources Web page accessed Feb. 15, 2008, at [Web page no longer available.]
Jutras, J.P. and McCandlish, Keith, 2006, Resource estimate—Tyler Resources Inc., Bahuerachi deposit, Chihuahua State, Mexico: Report prepared for Tyler Resources Inc., Calgary, Alberta, 117 p.
Minjárez-Sosa, Ismael, Montño-Jiménez, T.R., Ochoa-Granillo, José, Grijalva-Noriega, F.J., Ochoa-Landín, L.H., Urbina-Herrera, Saúl, Guzmán-Espinosa, J.B., and Mancilla-Gutiérrez, A.A., 2002, Carta geológico-minera, Ciudad Obregón G12-3, Sonora, Chihuahua: Servicio Geológico Mexicano, 1 sheet, scale 1:250,000.
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
Tyler Resources Inc., 2006, Resource estimate—Bahuerachi deposit, Chihuahua State, Mexico: Tyler Resources Inc. project no. 03PM69 final report, 125 p., accessed 2008, at [Web page no longer available.]
Tyler Resources Inc., 2007, Bahuerachi—A porphyry copper (Mo, Ag, Au, Zn) deposit and district with world class potential—Presentation update, July 2007: Tyler Resources Inc. update, 27 p., accessed 2008, at Tyler%20Corporate%20Presentation%20July%202007.pdf. [Web page no longer available.]
U.S. Geological Survey, 2007, Mineral Resources Data System (MRDS): U.S. Geological Survey database, accessed December 15, 2007, at