Tephrochronological and tephrostratigraphical potential of Pliocene-Pleistocene volcaniclastic deposits in the Japan Forearc, ODP Leg 186

Online Access: Get full text
doi: 10.2973/odp.proc.sr.186.107.2003
Author(s): Hunt, J. B.; Najman, Yanina M. R.
Ocean Drilling Program, Leg 186, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
University of Gloucestershire, Centre for Environmental Change and Quaternary Research, Cheltenham, United Kingdom
Other:
Carnegie Institution of Washington, United States
Ocean Drilling Program, United States
University of Tokyo, Japan
Stockholm University, Sweden
Hokkaido University, Japan
Pukyong National University, South Korea
Florida State University, United States
Indiana State University, United States
University of Edinburgh, United Kingdom
Shizuoka University, Japan
Universität Freiburg, Federal Republic of Germany
Lamont-Doherty Earth Observatory, United States
Volume Title: Proceedings of the Ocean Drilling Program, scientific results, Western Pacific geophysical observatories; covering Leg 186 of the cruises of drilling vessel JOIDES Resolution; Yokohama, Japan, to Yokohama, Japan; sites 1150 and 1151, 14 June-14 August 1999
Volume Author(s): Suyehiro, Kiyoshi; Sacks, I. Selwyn; Acton, Gary D.; Acierno, Michael J.; Araki, Eiichiro; Ask, Maria V. S.; Ikeda, Akihiro; Kanamatsu, Toshiya; Kim, Gil Young; Li, Jingfen; Linde, Alan T.; McWhorter, Paul N.; Mora, Germán; Najman, Yanina M. R.; Niitsuma, Nobuaki; Pandit, Benoy K.; Roller, Sybille; Saito, Saneatsu; Sakamoto, Tatsuhiko; Shinohara, Masanao; Sun, Yue-Feng
Source: Proceedings of the Ocean Drilling Program, scientific results, Western Pacific geophysical observatories; covering Leg 186 of the cruises of drilling vessel JOIDES Resolution; Yokohama, Japan, to Yokohama, Japan; sites 1150 and 1151, 14 June-14 August 1999, Kiyoshi Suyehiro, I. Selwyn Sacks, Gary D. Acton, Michael J. Acierno, Eiichiro Araki, Maria V. S. Ask, Akihiro Ikeda, Toshiya Kanamatsu, Gil Young Kim, Jingfen Li, Alan T. Linde, Paul N. McWhorter, Germán Mora, Yanina M. R. Najman, Nobuaki Niitsuma, Benoy K. Pandit, Sybille Roller, Saneatsu Saito, Tatsuhiko Sakamoto, Masanao Shinohara and Yue-Feng Sun; Ocean Drilling Program, Leg 186, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.186, 29p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendices. 59 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; illus., incl. 3 tables, sketch map
Summary: Major element geochemical composition was established for 59 tephra horizons from Ocean Drilling Program Sites 1150 and 1151, located in the Japan forearc. These data, encompassing typically between 15 and 30 individual shard analyses per tephra horizon, were used to investigate the degree to which sediment reworking, postdepositional geochemical alteration, and geochemical uniqueness of individual eruptives facilitate or impede the potential for establishing a tephrostratigraphical framework for the Japan Trench, as well as usage of the tephra record to document arc evolution. Evidence was found that hydration (termed phase 1 alteration) of glass shards increases with age in the Pliocene-Pleistocene, but there is no indication that element leaching (phase 2 alteration) has occurred. Post- or syn-depositional differences in preservational style are shown to have no significant bearing on tephrogeochemical homogeneity and suitability for tephrostratigraphical analysis. Overall, therefore, the volcaniclastic record is suitable for investigating medium- to long-term changes in arc geochemistry and, provided consideration is given to the potential for nonunique geochemical signatures, is suitable for erecting tephrochronological frameworks. A limited number of Pleistocene tephra correlations are suggested in furtherance of this framework goal.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Basins; Cenozoic; Chemical composition; Cores; Electron probe data; Fore-arc basins; Geochemistry; Japan Trench; Leg 186; Lithostratigraphy; Major elements; Marine environment; Marine sediments; Neogene; North Pacific; Northwest Pacific; ODP Site 1150; ODP Site 1151; Ocean Drilling Program; Pacific Ocean; Pleistocene; Pliocene; Quaternary; Sediments; Tephrochronology; Tertiary; Volcaniclastics; West Pacific
Coordinates: N384500 N384500 E1432000 E1432000
N391100 N391100 E1432000 E1432000
Record ID: 2004011519
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.