Hauling field gear up Gothic Mountain…
Other| February 01, 1974 Strata-Bound Copper Deposits in Triassic Sandstone of Sierra Nacimiento, New Mexico Lee A. Woodward; Lee A. Woodward Search for other works by this author on: GSW Google Scholar William H. Kaufman; William H. Kaufman Search for other works by this author on: GSW Google Scholar Otto L. Schumacher; Otto L. Schumacher Search for other works by this author on: GSW Google Scholar Lyle W. Talbott Lyle W. Talbott Search for other works by this author on: GSW Google Scholar Author and Article Information Lee A. Woodward William H. Kaufman Otto L. Schumacher Lyle W. Talbott Publisher: Society of Economic Geologists First Online: 02 Mar 2017 Online ISSN: 1554-0774 Print ISSN: 0361-0128 GeoRef, Copyright 2008, American Geological Institute. Abstract, Copyright, Society of Economic Geologists Economic Geology (1974) 69 (1): 108–120. https://doi.org/10.2113/gsecongeo.69.1.108 Article history First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Lee A. Woodward, William H. Kaufman, Otto L. Schumacher, Lyle W. Talbott; Strata-Bound Copper Deposits in Triassic Sandstone of Sierra Nacimiento, New Mexico. Economic Geology 1974;; 69 (1): 108–120. doi: https://doi.org/10.2113/gsecongeo.69.1.108 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEconomic Geology Search Advanced Search Abstract Copper sulfides and copper-iron sulfides have partly replaced or are closely associated with carbonaceous fossil plant material, mainly logs, in the Agua Zarca Sandstone Member of the Chinle Formation of Triassic age. Small amounts of native silver occur with the sulfides. Malachite, chrysocolla, and azurite fill the interstices and fractures in the clastic host rocks, forming irregular halos around the mineralized fossil plant material.Primary sulfide minerals, chalcocite, covellite, bornite, chalcopyrite, and pyrite, were probably deposited by ground-water solutions moving through paleochannel complexes in Triassic time shortly after deposition of the host rock; mineralization occurred where there was a favorable reducing environment provided principally by the carbonaceous material. The ultimate source of the copper may have been older deposits in the Precambrian rocks of the Uncompahgre highland in northern New Mexico and Colorado. The sulfide minerals were partly oxidized later, and copper in the form of malachite, chrysocolla, and azurite was disseminated in the adjacent host rock. Major faults post-date deposition of the sulfide minerals and can be expected to offset some of the mineralized paleochannels.Large-scale deposition of the sulfide minerals occurred at fossil logjams within paleochannels. Orientations of cross-bedding and fossil logs can be used to determine the trends of the paleochannels. These trends should be followed in subsurface exploration. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Items connected by shared entities, co-authorship, citations, or semantic similarity.