Acidic and sulfate-rich hydrothermal fluids from the Manus back-arc basin, Papua New Guinea

Abstract

Research Article| February 01, 1997 Acidic and sulfate-rich hydrothermal fluids from the Manus back-arc basin, Papua New Guinea Toshitaka Gamo; Toshitaka Gamo 1Ocean Research Institute, University of Tokyo, Nakano, Tokyo 164, Japan Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Kei Okamura; Kei Okamura 1Ocean Research Institute, University of Tokyo, Nakano, Tokyo 164, Japan Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Jean-Luc Charlou; Jean-Luc Charlou 2IFREMER/Centre de Brest, B.P. 70, 29280 Plouzane Cedex, France Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Tetsuro Urabe; Tetsuro Urabe 3Geological Survey of Japan, Tsukuba, Ibaraki 305, Japan Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Jean-Marie Auzende; Jean-Marie Auzende 2IFREMER/Centre de Brest, B.P. 70, 29280 Plouzane Cedex, France4ORSTOM/IFREMER (Noumea), B.P. A5, Noumea Cedex, New Caledonia Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Junichiro Ishibashi; Junichiro Ishibashi 5Laboratory for Earthquake Chemistry, University of Tokyo, Hongo, Tokyo 113, Japan Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Kiminori Shitashima; Kiminori Shitashima 6Central Research Institute of Electric Power Industry, Abiko, Chiba 270-11, Japan Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise; Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Hitoshi Chiba; Hitoshi Chiba 7Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 812, Japan Search for other works by this author on: GSW Google Scholar Shipboard Scientific Party of the ManusFlux Cruise Shipboard Scientific Party of the ManusFlux Cruise Search for other works by this author on: GSW Google Scholar Author and Article Information Toshitaka Gamo 1Ocean Research Institute, University of Tokyo, Nakano, Tokyo 164, Japan Shipboard Scientific Party of the ManusFlux Cruise Kei Okamura 1Ocean Research Institute, University of Tokyo, Nakano, Tokyo 164, Japan Shipboard Scientific Party of the ManusFlux Cruise Jean-Luc Charlou 2IFREMER/Centre de Brest, B.P. 70, 29280 Plouzane Cedex, France Shipboard Scientific Party of the ManusFlux Cruise Tetsuro Urabe 3Geological Survey of Japan, Tsukuba, Ibaraki 305, Japan Shipboard Scientific Party of the ManusFlux Cruise Jean-Marie Auzende 2IFREMER/Centre de Brest, B.P. 70, 29280 Plouzane Cedex, France4ORSTOM/IFREMER (Noumea), B.P. A5, Noumea Cedex, New Caledonia Shipboard Scientific Party of the ManusFlux Cruise Junichiro Ishibashi 5Laboratory for Earthquake Chemistry, University of Tokyo, Hongo, Tokyo 113, Japan Shipboard Scientific Party of the ManusFlux Cruise Kiminori Shitashima 6Central Research Institute of Electric Power Industry, Abiko, Chiba 270-11, Japan Shipboard Scientific Party of the ManusFlux Cruise Hitoshi Chiba 7Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 812, Japan Shipboard Scientific Party of the ManusFlux Cruise Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (2): 139–142. https://doi.org/10.1130/0091-7613(1997)025<0139:AASRHF>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 MailTo Tools Icon Tools Get Permissions Search Site Citation Toshitaka Gamo, Kei Okamura, Jean-Luc Charlou, Tetsuro Urabe, Jean-Marie Auzende, Junichiro Ishibashi, Kiminori Shitashima, Hitoshi Chiba; Shipboard Scientific Party of the ManusFlux Cruise, Acidic and sulfate-rich hydrothermal fluids from the Manus back-arc basin, Papua New Guinea. Geology 1997;; 25 (2): 139–142. doi: https://doi.org/10.1130/0091-7613(1997)025<0139:AASRHF>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 Hot (≥ 88-120 °C) and acidic (pH ≤ 2.1) hydrothermal fluids rich in sulfate were discovered venting in the DESMOS caldera (depth = 1926 m), eastern Manus back-arc basin, Bismarck Sea, surrounded by Papua New Guinea. The abundant sulfate (≥ 32.8 mM, higher than the seawater value of 28 mM) with elemental sulfur deposition around the vents, and remarkably low δD(H2O) and δ 34S(H2S) values (−8.1‰ and −5.6‰, respectively), are suggestive of the incorporation of a magmatic fluid and the disproportionation of the exsolved SO2 from a magma body. The DESMOS fluid may be similar in origin to the acidic sulfate-chloride hot springs associated with subaerial volcanic activity. In contrast to the typical hydrothermal end member Mg concentration of 0, the DESMOS fluids are rich in Mg (46–52 mM), probably because of Mg dissolution by acid attack upon magnesium silicate minerals. 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.