Muzuka, Alfred N N; Macko, Stephen A; Pedersen, Thomas F (1991): Stable carbon and nitrogen isotope composition of organic matter in sediments of the Oman Margin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.757351, Supplement to: Muzuka, ANN et al. (1991): Stable carbon and nitrogen isotope compositions of organic matter from Sites 724 and 725, Oman Margin. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 571-586, https://doi.org/10.2973/odp.proc.sr.117.163.1991
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Abstract:
Stable isotopic compositions of carbon and nitrogen and organic carbon content of sediments ranging from the Pliocene to the Pleistocene-Holocene in age from the Oman Margin (ODP Sites 724 and 725) are reported. In general, the organic carbon content is greater than 2% at Site 724. Prior to the Pleistocene-Holocene at this site, sediments with higher content of organic matter were deposited owing to favorable preservation conditions and/or higher productivity. In the Pleistocene, lower amounts of organic matter have been preserved; this material generally has more enriched nitrogen isotopic compositions. This may indicate intensification of the Oxygen Minimum Zone and denitrification with the onset of the Pleistocene. A correlation of carbon isotope content of these sediments with oxygen isotope stages at Site 724 indicates an enrichment in 13C during glacial events. Based on the stable isotope evidence of both carbon and nitrogen, there does not appear to be major input of terrigenous-derived allochthonous material in this marine environment. The timing and extent of monsoon winds on the productivity of this region are not evident, but require further studies for collaborative interpretation of small-scale features in the isotopic and carbon content of this environment.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 18.474900 * Median Longitude: 57.743550 * South-bound Latitude: 18.462500 * West-bound Longitude: 57.700600 * North-bound Latitude: 18.487300 * East-bound Longitude: 57.786500
Date/Time Start: 1987-09-21T00:00:00 * Date/Time End: 1987-09-23T00:00:00
Event(s):
117-724C * Latitude: 18.462500 * Longitude: 57.786500 * Date/Time Start: 1987-09-21T08:00:00 * Date/Time End: 1987-09-21T00:00:00 * Elevation: -603.0 m * Penetration: 252.4 m * Recovery: 242.7 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 252.4 m cored; 0 m drilled; 96.2 % recovery
117-725C * Latitude: 18.487300 * Longitude: 57.700600 * Date/Time Start: 1987-09-22T13:30:00 * Date/Time End: 1987-09-23T00:00:00 * Elevation: -323.0 m * Penetration: 162.8 m * Recovery: 98.76 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 162.8 m cored; 0 m drilled; 60.7 % 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
- Muzuka, ANN; Macko, SA; Pedersen, TF (1991): (Table 1) Stable isotope organic geochemistry of ODP Hole 117-724C. https://doi.org/10.1594/PANGAEA.757349
- Muzuka, ANN; Macko, SA; Pedersen, TF (1991): (Table 1) Stable isotope organic geochemistry of ODP Hole 117-725C. https://doi.org/10.1594/PANGAEA.757350