Tada, Ryuji; Iijima, Azuma (1992): Mineral composition and geochemistry of sediments from ODP Leg 127 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.778151, Supplement to: Tada, R; Iijima, A (1992): Lithostratigraphy and compositional variation of Neogene hemipelagic sediments in the Japan Sea. In: Tamaki, K; Suychiro, K; Allan, J; McWilliams, M; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(2), 1229-1260, https://doi.org/10.2973/odp.proc.sr.127128-2.188.1992
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Abstract:
The lithostratigraphy of Neogene hemipelagic sediments recovered from the Japan Sea during Leg 127 was revised to improve intersite consistency and to remove confusion stemming from diagenetic modification of the lithology through the opal-A to opal-CT transformation. Special emphasis was put on the presence and nature of dark-light cycles in revising the lithostratigraphy.
Mineral composition analysis was conducted for samples from Sites 794, 795, and 797. In addition, major element chemical composition analysis was conducted for these same sample sets from Site 794. The result of mineral composition analysis suggests that the detrital component, which consists of such minerals as quartz, plagioclase, illite, and kaolinite plus chlorite, is diluted to various degrees by biogenic silica (opal-A) and its diagenetic equivalents (opal-CT and quartz). Smectite, on the other hand, may be a diagenetic or hydrothermal alteration product of volcanic material, although more study is necessary to confirm its origin.
As a whole, vertical variation in the sediment composition is consistent with the revised lithostratigraphy and helps to characterize the redefined lithologic units quantitatively.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 40.734933 * Median Longitude: 137.601917 * South-bound Latitude: 38.616000 * West-bound Longitude: 134.536000 * North-bound Latitude: 43.987000 * East-bound Longitude: 138.967000
Date/Time Start: 1989-06-26T15:15:00 * Date/Time End: 1989-08-04T17:00:00
Event(s):
127-794A * Latitude: 40.190000 * Longitude: 138.231000 * Date/Time Start: 1989-06-26T15:15:00 * Date/Time End: 1989-06-30T12:15:00 * Elevation: -2822.0 m * Penetration: 351.3 m * Recovery: 302.17 m * Location: Japan Sea * Campaign: Leg127 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 351.3 m cored; 0 m drilled; 86 % recovery
127-794B * Latitude: 40.190000 * Longitude: 138.231000 * Date/Time Start: 1989-06-30T12:15:00 * Date/Time End: 1989-07-03T20:30:00 * Elevation: -2822.0 m * Penetration: 549 m * Recovery: 87.4 m * Location: Japan Sea * Campaign: Leg127 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 249.2 m cored; 0 m drilled; 35.1 % recovery
127-794C * Latitude: 40.190000 * Longitude: 138.231000 * Date/Time Start: 1989-07-03T20:30:00 * Date/Time End: 1989-07-11T11:00:00 * Elevation: -2820.0 m * Penetration: 653.7 m * Recovery: 33.21 m * Location: Japan Sea * Campaign: Leg127 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 93.9 m cored; 0 m drilled; 35.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Tada, R; Iijima, A (1992): (Table 2) Geochemistry of ODP Site 127-794 sediments. https://doi.org/10.1594/PANGAEA.778149
- Tada, R; Iijima, A (1992): (Table 1) Mineral composition of ODP Leg 127 sites. https://doi.org/10.1594/PANGAEA.778146