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Stein, Ruediger; Stax, Rainer (1992): Composition of organic carbon at ODP Site 128-798. PANGAEA, https://doi.org/10.1594/PANGAEA.776527, Supplement to: Stein, R; Stax, R (1992): Late Cenozoic changes in flux rates and composition of organic carbon at Sites 798 and 799 (Sea of Japan). In: Pisciotto, KA; Ingle, JCJr.; von Breymann, MT; Barron, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(1), 423-437, https://doi.org/10.2973/odp.proc.sr.127128-1.146.1992

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Abstract:
Organic geochemical and sedimentological investigations have been performed on sediments from ODP Sites 798 and 799 in order to reconstruct the depositional environment in the Japan Sea through late Cenozoic times. The Miocene to Quaternary sediments from Site 798 (Oki Ridge) and Site 799 (Kita-Yamato Trough) are characterized by high organic carbon contents of up to 6%. The organic matter is mainly a mixture of marine and terrigenous material. The dominant factors controlling marine organic carbon enrichment in the sediments of Hole 798A are probably an increased surface-water productivity and/or an increased preservation rate of organic carbon under anoxic deep-water conditions. In lower Pliocene sediments at Site 798 and Miocene to Quaternary sediments at Site 799, rapid burial of organic matter in turbidites may have been important, too. Remarkable cycles of dark, laminated sediments distinctly enriched in (marine) organic carbon by up to 5% and light, bioturbated to homogeneous sediments with reduced organic carbon contents indicate dramatic short-term paleoenvironmental variation.
Project(s):
Coverage:
Median Latitude: 37.038400 * Median Longitude: 134.799700 * South-bound Latitude: 37.038300 * West-bound Longitude: 134.799600 * North-bound Latitude: 37.038500 * East-bound Longitude: 134.799800
Date/Time Start: 1989-08-27T07:15:00 * Date/Time End: 1989-08-31T08:00:00
Event(s):
128-798A * Latitude: 37.038300 * Longitude: 134.799800 * Date/Time Start: 1989-08-27T07:15:00 * Date/Time End: 1989-08-28T10:24:00 * Elevation: -914.0 m * Penetration: 143.3 m * Recovery: 148.27 m * Location: Japan Sea * Campaign: Leg128 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 143.3 m cored; 0 m drilled; 103.5 % recovery
128-798B * Latitude: 37.038500 * Longitude: 134.799600 * Date/Time Start: 1989-08-28T10:24:00 * Date/Time End: 1989-08-31T08:00:00 * Elevation: -911.0 m * Penetration: 517.9 m * Recovery: 514.42 m * Location: Japan Sea * Campaign: Leg128 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 54 cores; 517.9 m cored; 0 m drilled; 99.3 % recovery
Size:
2 datasets

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