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Hunt, John B; Najman, Yanina M R (2003): Distribution, depositional form and geochemical composition of tephra horizons in ODP Sites 186-1150 and 186-1151 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.783505, Supplement to: Hunt, JB; Najman, YMR (2003): Tephrochronological and tephrostratigraphical potential of Pliocene-Pleistocene volcaniclastic deposits in the Japan forearc, ODP Leg 186. In: Suyehiro, K; Sacks, IS; Acton, GD; Oda, M (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 186, 1-29, https://doi.org/10.2973/odp.proc.sr.186.107.2003

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Abstract:
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.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 39.009607 * Median Longitude: 143.332890 * South-bound Latitude: 38.750330 * West-bound Longitude: 143.331910 * North-bound Latitude: 39.181910 * East-bound Longitude: 143.334400
Date/Time Start: 1999-06-22T18:30:00 * Date/Time End: 1999-08-10T09:45:00
Event(s):
186-1150A * Latitude: 39.181910 * Longitude: 143.331910 * Date/Time Start: 1999-06-22T18:30:00 * Date/Time End: 1999-06-26T22:15:00 * Elevation: -2680.8 m * Penetration: 722.6 m * Recovery: 566.4 m * Location: North Pacific Ocean * Campaign: Leg186 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 76 cores; 722.6 m cored; 0 m drilled; 78.4 % recovery
186-1150B * Latitude: 39.181900 * Longitude: 143.332450 * Date/Time Start: 1999-06-26T22:15:00 * Date/Time End: 1999-07-03T13:30:00 * Elevation: -2680.8 m * Penetration: 1181.6 m * Recovery: 269.29 m * Location: North Pacific Ocean * Campaign: Leg186 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 478.3 m cored; 703.3 m drilled; 56.3 % recovery
186-1151A * Latitude: 38.751980 * Longitude: 143.334400 * Date/Time Start: 1999-07-28T22:00:00 * Date/Time End: 1999-08-02T17:45:00 * Elevation: -2182.2 m * Penetration: 1113.6 m * Recovery: 707.6 m * Location: North Pacific Ocean * Campaign: Leg186 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 108 cores; 1035.6 m cored; 0 m drilled; 68.3 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Hunt, JB; Najman, YMR (2003): (Table T3) Proportions of volcanic material in tephra layers and pods from ODP Site 186-1150. https://doi.org/10.1594/PANGAEA.783502
  2. Hunt, JB; Najman, YMR (2003): (Table AT1) Major element oxide composition of tephra shards from ODP Hole 186-1150A. https://doi.org/10.1594/PANGAEA.783503
  3. Hunt, JB; Najman, YMR (2003): (Table T1) Pliocene-Pleistocene tephra distribution and depositional form of ODP Hole 186-1150A. https://doi.org/10.1594/PANGAEA.783500
  4. Hunt, JB; Najman, YMR (2003): (Table AT2) Major element oxide composition of tephra shards from ODP Site 186-1151. https://doi.org/10.1594/PANGAEA.783504
  5. Hunt, JB; Najman, YMR (2003): (Table T2) Pliocene-Pleistocene tephra distribution and depositional form of ODP Site 186-1151. https://doi.org/10.1594/PANGAEA.783501