Occurrence of copper and silver at the Carrizo copper mine in the Carrizo Mountains, Apache County, Arizona
— Virginia T. McLemore and William L. Chenoweth

Copper and silver are present at the Carrizo copper mine in the Carrizo Mountains, approximately 2.5 mi west of Beclabito, NM, in Apache County, AZ. A shipment of 1500 lbs of co; per ore worth $68.33 was possibly made to a smelter at Durango, Colorado, from this mine by the Navajo Mining Co. in 1921. The Carrizo Mountains lie along the southern extent of the Colorado lineament, crustal zone characterized predominantly by Precambrian faults and the Colorado mineral belt. Much of the Carrizo Mountains is formed by a Late Cretaceous to Tertiary diorite-porphyry laccolith, which Intrudes older sedimentary rocks. The age of the Carrizo laccolith is uncertain, but it was probably emplaced along northeast-trending fault zones during or soon after the shallow subduction of the Farallon plate beneath the American plate. The Carrizo copper mine is located along a fault zone in the upper sandstone beds of the Salt Wash Member of the Morrison Formation (Jurassic), which trends N65°E with a dip of vertical to 81°S. Malachite, azurite and chalcocite coat fractures and are disseminated within the sandstone, -lid are associated with organic material. No anomalous radioactivity was noted anywhere at the site. Co per may have been leached from the Carrizo laccolith by meteoric fluids during or after cooling and precipitated in the overlying Salt Wash sandstone in the presence of organic material (supergene processes). r, copper-rich magmatic-hydrothermal fluids evolved from the Carrizo laccolith, migrated along the fa, and copper precipitated in the sandstone in the presence of reducing organic material or by simple cool' of the fluids(epithermal processes).