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The AAPG/Datapages Combined Publications Database

Grand Junction Geological Society

Abstract


Scenic Geology of the San Juan Mountains, Colorado, 1978
Pages 91-98

Ore Deposits in the Central San Juan Mountains, Colorado

Thomas A. Steven

Abstract

Most mineralized areas in the central San Juan Mountains, Colorado, are associated with the youngest subsidence structures in a large volcanic cauldron complex that formed concurrently with eruption of the surrounding ash-flow field. Two local types have been recognized: (1) fissure-vein deposits along faults characterized by relatively late movement, and (2) hydrothermally altered and mineralized areas associated with postsubsidence Fisher Quartz Latite centers. The first type has provided most production in the past; the potential of the second type has yet to be adequately tested.


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