The Derni Cu-Co Massive Sulfide Deposit, Qinghai Province, China: Ultramafic Volcanic-hosted Submarine-exhalative Mineralization

Abstract

Research Article| July 01, 2000 The Derni Cu-Co Massive Sulfide Deposit, Qinghai Province, China: Ultramafic Volcanic-hosted Submarine-exhalative Mineralization YUWANG WANG; YUWANG WANG Beijing Institute of Geology for Mineral Resources, CNNC, Beijing 100012, People’s Republic of China Search for other works by this author on: GSW Google Scholar KEZHANG QIN; KEZHANG QIN Beijing Institute of Geology for Mineral Resources, CNNC, Beijing 100012, People’s Republic of China Search for other works by this author on: GSW Google Scholar YANGGENG TAN; YANGGENG TAN Northwest Institute of Geology for Mineral Resources, CNNC, Xi’an 710054, People’s Republic of China Search for other works by this author on: GSW Google Scholar ZENGQIAN HOU ZENGQIAN HOU Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 100037, People’s Republic of China Search for other works by this author on: GSW Google Scholar Author and Article Information YUWANG WANG Beijing Institute of Geology for Mineral Resources, CNNC, Beijing 100012, People’s Republic of China KEZHANG QIN Beijing Institute of Geology for Mineral Resources, CNNC, Beijing 100012, People’s Republic of China YANGGENG TAN Northwest Institute of Geology for Mineral Resources, CNNC, Xi’an 710054, People’s Republic of China ZENGQIAN HOU Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 100037, People’s Republic of China Publisher: Canadian Institute of Mining, Metallurgy and Petroleum Received: 29 May 1998 Accepted: 24 May 2001 First Online: 02 Mar 2017 © 2002 Canadian Institute of Mining, Metallurgy and Petroleum Exploration and Mining Geology (2000) 9 (3-4): 253–264. https://doi.org/10.2113/0090253 Article history Received: 29 May 1998 Accepted: 24 May 2001 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation YUWANG WANG, KEZHANG QIN, YANGGENG TAN, ZENGQIAN HOU; The Derni Cu-Co Massive Sulfide Deposit, Qinghai Province, China: Ultramafic Volcanic-hosted Submarine-exhalative Mineralization. Exploration and Mining Geology 2000;; 9 (3-4): 253–264. doi: https://doi.org/10.2113/0090253 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 SocietyExploration and Mining Geology Search Advanced Search Abstract The large Derni Cu-Co (-Zn) deposit in Qinghai Province exhibits unusual geological features, and its genesis is controversial. Based on previous research and detailed field investigations, petrographic studies of the host volcanic rocks, isotope and trace element geochemistry of the sulfide ore, and comparison with typical ore deposits, this deposit is a VHMS (submarine volcanic-hosted massive sulfide deposit) type. This argues against previous interpretations of a magmatic or a hydrothermal replacement origin. Systematic rock, mineral and geochemical studies of the host serpentinites of the ore district indicate that the protoliths of several types of serpentinites that are widespread in the ore district are mainly ultramafic volcanic rocks. The mineralization formed within an ultramafic volcanic breccia, or between the breccia and its overlying Mg-rich carbonate rocks and volcanic sedimentary rocks. The ore-forming components were derived mainly from ultramafic rocks and partly from mafic rocks. The ultramafic rocks are MgO-rich, CaO-poor with a high MgO/FeO ratio, and the mafic rocks are rich in Na2O and poor in K2O. The chemical composition of the ultramafic rocks is similar to that of volcanic peridotite, or komatiite. The volcanic rocks that host the Derni deposit are among the most basic host rocks known for VHMS deposits, and the Derni deposit represents the most basic member in the VHMS deposit spectrum. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.