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White Island, New Zealand, volcanic-hydrothermal system represents the geochemical environment of high-sulfidation Cu and Au ore deposition

1993; Geological Society of America; Volume: 21; Issue: 8 Linguagem: Inglês

10.1130/0091-7613(1993)021 2.3.co;2

1943-2682

Jeffrey W. Hedenquist, Stuart F. Simmons, Werner F. Giggenbach, C. Stewart Eldridge,

earthquake and tectonic studies

Research Article| August 01, 1993 White Island, New Zealand, volcanic-hydrothermal system represents the geochemical environment of high-sulfidation Cu and Au ore deposition Jeffrey W. Hedenquist; Jeffrey W. Hedenquist 1Mineral Resources Department, Geological Survey of Japan, Higashi 1-1-3, Tsukuba 305, Japan Search for other works by this author on: GSW Google Scholar Stuart F. Simmons; Stuart F. Simmons 2Geothermal Institute, University of Auckland, Private Bag, Auckland, New Zealand Search for other works by this author on: GSW Google Scholar Werner F. Giggenbach; Werner F. Giggenbach 3Institute of Geological and Nuclear Sciences, Box 30368, Lower Hutt, New Zealand Search for other works by this author on: GSW Google Scholar C. Stewart Eldridge C. Stewart Eldridge 4Research School of Earth Sciences, Australian National University, Canberra 2601, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information Jeffrey W. Hedenquist 1Mineral Resources Department, Geological Survey of Japan, Higashi 1-1-3, Tsukuba 305, Japan Stuart F. Simmons 2Geothermal Institute, University of Auckland, Private Bag, Auckland, New Zealand Werner F. Giggenbach 3Institute of Geological and Nuclear Sciences, Box 30368, Lower Hutt, New Zealand C. Stewart Eldridge 4Research School of Earth Sciences, Australian National University, Canberra 2601, Australia Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (8): 731–734. https://doi.org/10.1130/0091-7613(1993)021 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Jeffrey W. Hedenquist, Stuart F. Simmons, Werner F. Giggenbach, C. Stewart Eldridge; White Island, New Zealand, volcanic-hydrothermal system represents the geochemical environment of high-sulfidation Cu and Au ore deposition. Geology 1993;; 21 (8): 731–734. doi: https://doi.org/10.1130/0091-7613(1993)021 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 The White Island volcanic-hydrothermal system, New Zealand, is thought to closely represent the chemical conditions that lead to the formation of high- sulfidation Cu-Au ore deposits. The amounts of Cu and Au produced over a 10 ka period of activity, largely from degassing magma, are calculated to be 106 and 45 t, respectively. Altered andesite blocks ejected from recent vents contain alunite, anhydrite, and pyrite. Their S isotopic composition indicates vein filling at ∼380 °C. At this temperature, Cu and Au are highly soluble in acid solutions, which may explain the depletion of Cu and absence of Au in the ejecta. Mass-balance calculations, however, suggest that Cu and Au are precipitated in cooler zones before the acid solutions discharge at the surface. 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.