Mineral Deposits in the West Chinati Stock, Chinati Mountains, Presidio County, Texas

Abstract
The West Chinati stock, well exposed in San Antonio Canyon and immediately westward on slopes of the southwestern part of the Chinati Mountains, Presidio County, Texas, is a large stocklike body of porphyritic hornblende granite cut by numerous dikes and irregular-shaped plutons of rhyolite, rhyolite porphyry, microgranite, trachyte porphyry, diorite, and igneous breccia. Fissure veins developed in wide and long sheeted zones which strike E-W and N. 50" E. containpotentially commercial deposits of lead-zinc-silver fluorspar, minerals including galena (PbS), sphalerite (ZnS), argentite (Ag2S), cerargyrite (AgCl), and fluorite (CaF2). Minor amounts of chalcopyrite (CuFeS2) and oxidized copper minerals also occur in the fissure vein deposits. Marginal bodies of rhyolite, rhyolite porphyry, and trachyte porphyry contain disseminated copper mineralization and possibly host commercial porphyry-type copper deposits.
Authors
William N. McAnulty, Sr.
Citation

McAnulty, W. N.., Sr., 1972, Mineral Deposits in the West Chinati Stock, Chinati Mountains, Presidio County, Texas: The University of Texas at Austin, Bureau of Economic Geology, Geological Circular 72-1, 13 p. doi.org/10.23867/gc7201D.

ISSN
2475-3637
Number of figures
7
Number of pages
13
Publisher
The University of Texas at Austin, Bureau of Economic Geology
Series
Geological Circular
Year
1972