Petrography and geochemistry of jasperoids from Site 1189, Ocean Drilling Program Leg 193

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doi: 10.2973/odp.proc.sr.193.211.2006
Author(s): Binns, Raymond A.
Ocean Drilling Program, Leg 193, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
CSIRO, Divison of Exploration and Mining, North Ryde, N.S.W., Australia
Other:
CSIRO, Australia
Ocean Drilling Program, United States
Kanazawa University, Japan
Woods Hole Oceanographic Institution, United States
RTWH Aachen, Federal Republic of Germany
University of Leeds, United Kingdom
Geological Survey of Norway, Norway
Johns Hopkins University, United States
Indiana University, United States
Geological Survey of Papua New Guinea, Papua New Guinea
Lamont-Doherty Earth Observatory, United States
Hiroshima University, Japan
Universität Bremen, Federal Republic of Germany
Korea Ocean Research and Development Institute, South Korea
University of Papua New Guinea, Papua New Guinea
Technische Universität Bergakademie Freiberg, Federal Republic of Germany
University of Southampton, United Kingdom
University of Toronto, Canada
Georgia State University, United States
Nautilus Minerals Corporation, Australia
Volume Title: Proceedings of the Ocean Drilling Program; scientific results; anatomy of an active felsic-hosted hydrothermal system, eastern Manus Basin; covering Leg 193 of the cruises of the drilling vessel JOIDES Resolution; Apra Harbor, Guam, to Townsville, Australia; Sites 1188-1191; 7 November 2000-3 January 2001
Volume Author(s): Barriga, Fernando J. A. S.; Binns, Raymond A.; Miller, D. Jay; Asada, Ryuji; Bach, Wolfgang; Bartetzko, Anne C. M.; Benning, Liane G.; Bjerkgard, Terje; Christiansen, Lizet B.; Elswick, Erika R.; Findlay, Robert; Iturrino, Gerardo J.; Kimura, Hiroyuki; Kulange, John B.; Lackschewitz, Klas S.; Lee, Sang-Mook; Masta, Andrew; Paulick, Holger; Pinto, Alvaro M.; Roberts, Stephen; Scott, Steven D.; Vanko, David A.; Warden, Ian; Yeats, Christopher J.
Source: Proceedings of the Ocean Drilling Program; scientific results; anatomy of an active felsic-hosted hydrothermal system, eastern Manus Basin; covering Leg 193 of the cruises of the drilling vessel JOIDES Resolution; Apra Harbor, Guam, to Townsville, Australia; Sites 1188-1191; 7 November 2000-3 January 2001, Fernando J. A. S. Barriga, Raymond A. Binns, D. Jay Miller, Ryuji Asada, Wolfgang Bach, Anne C. M. Bartetzko, Liane G. Benning, Terje Bjerkgard, Lizet B. Christiansen, Erika R. Elswick, Robert Findlay, Gerardo J. Iturrino, Hiroyuki Kimura, John B. Kulange, Klas S. Lackschewitz, Sang-Mook Lee, Andrew Masta, Holger Paulick, Alvaro M. Pinto, Stephen Roberts, Steven D. Scott, David A. Vanko, Ian Warden and Christopher J. Yeats; Ocean Drilling Program, Leg 193, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.193, 30p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTML. 7 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; illus., incl. 3 tables
Summary: Bright red "jasperoids" were recovered at three positions during Leg 193 drilling below Roman Ruins (Site 1189) in the PACMANUS hydrothermal field. These do not represent fossil exhalative oxide deposits equivalent to those associated with sulfide chimneys at the Roman Ruins seafloor. Rather, they constitute an integral, relatively early stage involving oxidized fluids in the development of veins and breccias that characterize the mostly sulfidic stockwork zone intersected below Roman Ruins in Hole 1189B. They formed by growth of quartz in open spaces created by hydrofracturing, the characteristic feature being mostly euhedral cores dusted by tiny hematite flakes. In one occurrence there are also frondlike aggregates and possible earlier cavity linings of hematite, overgrown by quartz, that potentially formed by maturation of ferruginous gels first deposited in the openings. The trace element geochemistry of the jasperoids, apart from minor enrichment in uranium, provides no indication that they represent subsurface conduits for fluids that deposit Fe-Mn-Si at the seafloor, though this remains a possibility for some such deposits.
Year of Publication: 2007
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 06 Petrology, Sedimentary; Bismarck Sea; Chemical composition; Chemically precipitated rocks; Chert; Concentration; Geochemistry; Jasperoid; Leg 193; Manus Basin; Mineral composition; ODP Site 1189; Ocean Drilling Program; PACMANUS hydrothermal field; Pacific Ocean; Roman Ruins hydrothermal field; Sedimentary rocks; South Pacific; Southwest Pacific; Trace elements; Wall rocks; West Pacific
Coordinates: S034300 S034300 E1514100 E1514000
Record ID: 2007051491
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