Newman, Sally; van der Laan, Sieger R (1992): Geochemistry of glasses from ODP Site 125-786 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.763129, Supplement to: Newman, S; van der Laan, SR (1992): Volatile contents of Izu-Bonin Forearc volcanic glasses. 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, 131-139, https://doi.org/10.2973/odp.proc.sr.125.140.1992
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Abstract:
Eleven glasses recovered from Holes 786A and 786B were fresh enough for volatile analysis by infrared spectroscopy. The compositions of these glasses range from boninitic to rhyolitic. The glasses from the boninites contain 1.4 to 1.7 wt% H2O, while the rhyolitic glasses contain 2 to 6 wt% H2O, and all glasses have less than 30 to 40 ppm CO2. The highest H2O contents are probably the result of seawater alteration. The unaltered dacitic to rhyolitic glasses were probably quenched at low pressures corresponding to depths of 0-700 m below the seafloor, also corresponding to the depths of collection of these samples, although the water depths may have been different between the Eocene and the present. The lower boninitic H2O contents in vesicular glasses suggest shallow quenching on the seafloor.
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: 1989-04-04T12:00:00 * Date/Time End: 1989-04-16T17:00:00
Event(s):
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:
2 datasets
Download Data
Datasets listed in this publication series
- Newman, S; van der Laan, SR (1992): (Table 1) Infrared absorbance for ODP Site 125-786 samples. https://doi.org/10.1594/PANGAEA.763122
- Newman, S; van der Laan, SR (1992): (Table 3) Major element glass ananlyses of samples from ODP Site 125-786. https://doi.org/10.1594/PANGAEA.763128