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Murton, Bramley J; Peate, David W; Arculus, Richard J; Pearce, Julian A; van der Laan, Sieger R (1992): Geochemistry of ODP Site 125-786 volcanic rocks [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.769653, Supplement to: Murton, BJ et al. (1992): Trace-element geochemistry of volcanic rocks from Site 786: the Izu-Bonin Forearc. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 211-235, https://doi.org/10.2973/odp.proc.sr.125.133.1992

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Published: 1992 (exact date unknown) • DOI registered: 2011-10-04

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Abstract:
Eocene-Oligocene volcanic rocks drilled at Site 786 in the Izu-Bonin forearc cover a wide range of compositions from primitive boninites to highly evolved rhyolites. K-Ar dating reveals at least two distinct episodes of magmatism; one at 41 Ma and a later one at 35 Ma. The early episode produced low-Ca boninites and bronzite andesites that form an oceanic basement of pillow lavas and composite intrusive sheets, overlain by flows and intrusive sheets of intermediate-Ca boninites and bronzite-andesites and a fractionated series of andesites, dacites, and rhyolites. The later episode produced high-Ca boninites and intermediate-Ca boninites, exclusively as intrusive sheets.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 31.874600 * Median Longitude: 141.226250 * South-bound Latitude: 31.874200 * West-bound Longitude: 141.226000 * North-bound Latitude: 31.875000 * East-bound Longitude: 141.226500
Date/Time Start: 1989-04-04T00:00:00 * Date/Time End: 1989-04-16T17:00:00
Event(s):
125-786 * Latitude: 31.874600 * Longitude: 141.226250 * Date/Time Start: 1989-04-04T00:00:00 * Date/Time End: 1989-04-16T00:00:00 * Elevation: -3076.0 m * Penetration: 995.1 m * Recovery: 275 m * Location: North Pacific Ocean * Campaign: Leg125 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 91 cores; 832.6 m cored; 0 m drilled; 33% recovery
125-786A * Latitude: 31.875000 * Longitude: 141.226000 * Date/Time Start: 1989-04-04T12:00:00 * Date/Time End: 1989-04-04T12:00:00 * Elevation: -3070.0 m * Penetration: 166.5 m * Recovery: 84.95 m * Location: North Pacific Ocean * Campaign: Leg125 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 166.5 m cored; 0 m drilled; 51 % recovery
125-786B * Latitude: 31.874200 * Longitude: 141.226500 * Date/Time Start: 1989-04-04T12:00:00 * Date/Time End: 1989-04-16T17:00:00 * Elevation: -3082.0 m * Penetration: 828.6 m * Recovery: 190.07 m * Location: North Pacific Ocean * Campaign: Leg125 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 72 cores; 666.1 m cored; 0 m drilled; 28.5 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Murton, BJ; Peate, DW; Arculus, RJ et al. (1992): (Table 2) Major- and trace-element concentrations of ODP Site 125-786 samples. https://doi.org/10.1594/PANGAEA.769650
  2. Murton, BJ; Peate, DW; Arculus, RJ et al. (1992): (Table 3) Trace-element concentrations of ODP Site 125-786 samples. https://doi.org/10.1594/PANGAEA.769651
  3. Murton, BJ; Peate, DW; Arculus, RJ et al. (1992): (Table 4) Trace-element concentrations of selected ODP Site 125-786A samples. https://doi.org/10.1594/PANGAEA.769652