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Gadley, Kyle L; Marsaglia, Kathleen M (2005): Age and petrographic characterization of volcanic ash from ODP Leg 198 and Leg 126 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.778236, Supplement to: Gadley, KL; Marsaglia, KM (2005): Petrography and correlation of Cenozoic ash layers recovered on Shatsky Rise, ODP Leg 198. In: Bralower, TJ; Premoli Silva, I; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 198, 1-26, https://doi.org/10.2973/odp.proc.sr.198.108.2005

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Abstract:
In this study of volcanic ash retrieved from Shatsky Rise during Ocean Drilling Program Leg 198, the texture and composition of the volcanic components (glass and crystals) were used to fingerprint ash layers for detailed correlation. Correlations among ash layers in holes drilled at the same site as well as between sites, including sites on different parts (highs) of the rise, were tested. Although high-to-high correlations failed, intrahigh correlations were more successful. Our data suggest a significantly different source for some pyroclastic debris, especially at Site 1208, possibly associated with pumice rafts carried northward from the Izu-Bonin arc by the Kuroshio Current. Other ashes are consistent with rhyolitic to dacitic air fall ash from Asian arc volcanoes. We were not able to texturally distinguish between air fall ash and pumice-raft fallout but suspect that the latter is associated with higher percentages of vesiculated ash components, as we demonstrate occur in more proximal Izu-Bonin pyroclastic deposits.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 34.020356 * Median Longitude: 151.876393 * South-bound Latitude: 30.916100 * West-bound Longitude: 139.844300 * North-bound Latitude: 37.790480 * East-bound Longitude: 162.750880
Date/Time Start: 1989-04-30T06:30:00 * Date/Time End: 2001-10-04T03:00:00
Event(s):
126-788C * Latitude: 30.922000 * Longitude: 140.003800 * Date/Time Start: 1989-05-14T01:20:00 * Date/Time End: 1989-05-15T03:15:00 * Elevation: -1113.0 m * Penetration: 262.5 m * Recovery: 146.15 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 258.5 m cored; 0 m drilled; 56.5 % recovery
126-790B * Latitude: 30.916100 * Longitude: 139.844300 * Date/Time Start: 1989-04-30T06:30:00 * Date/Time End: 1989-05-01T11:15:00 * Elevation: -2234.0 m * Penetration: 138.9 m * Recovery: 88.69 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 138.9 m cored; 0 m drilled; 63.9 % recovery
126-791A * Latitude: 30.916500 * Longitude: 139.870100 * Date/Time Start: 1989-05-04T10:38:00 * Date/Time End: 1989-05-06T16:45:00 * Elevation: -2279.0 m * Penetration: 457 m * Recovery: 179.86 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 457 m cored; 0 m drilled; 39.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Gadley, KL; Marsaglia, KM (2005): (Table T1) Age and petrographic characterization of volcanic ash from ODP Leg 198 and Leg 126 sites. https://doi.org/10.1594/PANGAEA.778234
  2. Gadley, KL; Marsaglia, KM (2005): (Table T3) Recalculated petrographic parameters of volcanic ash from ODP Leg 198 and Leg 126 sites. https://doi.org/10.1594/PANGAEA.778235