Research Article| January 01, 1999 Syngenetic Au on the Carlin trend: Implications for Carlin-type deposits Poul Emsbo; Poul Emsbo 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401, USA Search for other works by this author on: GSW Google Scholar Richard W. Hutchinson; Richard W. Hutchinson 1Department of Geology and Geological Engineering, Colorado School of Mines, Golden, Colorado 80401, USA Search for other works by this author on: GSW Google Scholar Albert H. Hofstra; Albert H. Hofstra 2U.S. Geological Survey, MS 973, Denver, Colorado 80225, USA Search for other works by this author on: GSW Google Scholar Jeffrey A. Volk; Jeffrey A. Volk 3Barrick Goldstrike Mines Inc., P.O. Box 29, Elko, Nevada 89801, USA Search for other works by this author on: GSW Google Scholar Keith H. Bettles; Keith H. Bettles 3Barrick Goldstrike Mines Inc., P.O. Box 29, Elko, Nevada 89801, USA Search for other works by this author on: GSW Google Scholar Gary J. Baschuk; Gary J. Baschuk 3Barrick Goldstrike Mines Inc., P.O. Box 29, Elko, Nevada 89801, USA Search for other works by this author on: GSW Google Scholar Craig A Johnson Craig A Johnson 4U.S. Geological Survey, MS 963, Denver, Colorado 80225, USA Search for other works by this author on: GSW Google Scholar Geology (1999) 27 (1): 59–62. https://doi.org/10.1130/0091-7613(1999)027<0059:SAOTCT>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Poul Emsbo, Richard W. Hutchinson, Albert H. Hofstra, Jeffrey A. Volk, Keith H. Bettles, Gary J. Baschuk, Craig A Johnson; Syngenetic Au on the Carlin trend: Implications for Carlin-type deposits. Geology 1999;; 27 (1): 59–62. doi: https://doi.org/10.1130/0091-7613(1999)027<0059:SAOTCT>2.3.CO;2 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 SocietyGeology Search Advanced Search Abstract A new type of gold occurrence recently discovered in the Carlin trend, north-central Nevada, is clearly distinct from classic Carlin-type gold ore. These occurrences are interpreted to be of sedimentary exhalative (sedex) origin because they are stratiform and predate compaction and lithification of their unaltered Devonian host rocks. They contain barite that exhibits δ34S and δ180 values identical to sulfate in Late Devonian seawater and sedex-type barite deposits. Abrupt facies changes in the host rocks strongly suggest synsedimentary faulting and foundering of the carbonate shelf during mineralization, as is characteristic of sedex deposits. Gold occurs both as native inclusions in synsedimentary base-metal sulfides and barite, and as chemical enrichments in sulfide minerals. The absence of alteration and lack of δ13C and δ180 isotopic shift of primary carbonates in these rocks is strong evidence that this gold was not introduced with classic Carlin-type mineralization. Collectively, these features show that the Devonian strata were significantly enriched in gold some 300 m.y. prior to generation of the mid-Tertiary Carlin-type deposits. These strata may have been an important, perhaps even vital, source of gold for the latter. Although gold is typically low in most Zn-Pb-rich sedex deposits, our evidence suggests that transport of gold in basinal fluids, and its subsequent deposition in the sedex environment, can be significant. 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.
