Precious- and base-metal districts in Rio Arriba and Sandoval Counties, New Mexico
Virginia T. McLemore

Abstract:

 Total production from Rio Arriba and Sandoval Counties is estimated at 8 million lbs of copper, 66,000 oz of gold, 284,000 oz of silver, 41,000 lbs of lead, and 1000 lbs of zinc. Five types of precious- and base-metal deposits occur in this area: placer gold, volcanic-epithermal veins, sedimentary-hydrothermal baritefluorite-galena (± copper, silver) deposits, sedimentary-copper deposits, and Precambrian vein and replacement deposits. Of these deposits, volcanic-epithermal veins in the Cochiti district and sedimentary-copper deposits in the Nacimiento Mountains district have yielded significant production and continue as viable exploration targets. Furthermore, there may be additional potential for Precambrian precious-metal vein deposits in the Bromide and Hopewell districts in the Tusas Mountains.


Citation:

  1. McLemore, Virginia T., 1992, Precious- and base-metal districts in Rio Arriba and Sandoval Counties, New Mexico, in: San Juan Basin IV, Lucas, Spencer, G.; Kues, Barry S.; Williamson, Thomas E.; Hunt, Adrian P., New Mexico Geological Society, Guidebook, 43rd Field Conference, pp. 385-389.

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