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Meyers, Philip A; Snowdon, Lloyd R (1992): Extractable hydrocarbon and carbon isotope geochemistry of Lower Cretaceous sediments of the Exmouth Plateau. PANGAEA, https://doi.org/10.1594/PANGAEA.762762, Supplement to: Meyers, PA; Snowdon, LR (1992): Data report: Extractable hydrocarbon and carbon isotope geochemistry of Lower Cretaceous sediments from Sites 762 and 763 on the Exmouth Plateau, Northwest Australian Margin. In: von Rad, U; Haq, BU; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 122, 855-860, https://doi.org/10.2973/odp.proc.sr.122.130.1992

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Abstract:
The organic geochemical character of rocks selected from Aptian, Valanginian, and Berriasian clay stone and siltstone sequences encountered in Ocean Drilling Program (ODP) Holes 762C and 763C on the Exmouth Plateau was determined by means of a variety of analytical procedures. These sequences represent distal portions of the Mesozoic Barrow delta, in which petroleum source rocks and reservoirs exist on the Australian continent. The organic matter at the ODP sites is thermally immature type III material. Biomarker hydrocarbon compositions are dominated by long-chain, waxy n-alkanes and by C29 steranes, which reflect the land-plant origin of organic matter. Organic carbon d13C values ranged from -26 per mil to -28 per mil, consistent with a C3 land-plant source. Kerogen pyrolysate compositions and hopane isomerization ratios revealed progressively larger contributions of recycled organic matter as the depth of the deltaic sedimentary layers became greater.
Project(s):
Coverage:
Median Latitude: -20.260333 * Median Longitude: 112.229747 * South-bound Latitude: -20.587000 * West-bound Longitude: 112.208500 * North-bound Latitude: -19.887000 * East-bound Longitude: 112.254000
Date/Time Start: 1988-07-27T03:25:00 * Date/Time End: 1988-08-17T12:00:00
Event(s):
122-762C * Latitude: -19.887000 * Longitude: 112.254000 * Date/Time Start: 1988-07-27T03:25:00 * Date/Time End: 1988-08-05T08:30:00 * Elevation: -1371.0 m * Penetration: 940 m * Recovery: 534.54 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 91 core; 940 m cored; 0 m drilled; 56.9 % recovery
122-763B * Latitude: -20.587000 * Longitude: 112.208700 * Date/Time Start: 1988-08-06T07:30:00 * Date/Time End: 1988-08-11T21:00:00 * Elevation: -1379.0 m * Penetration: 653.5 m * Recovery: 376.36 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 54 cores; 653.5 m cored; 0 m drilled; 57.6 % recovery
122-763C * Latitude: -20.587000 * Longitude: 112.208500 * Date/Time Start: 1988-08-11T21:00:00 * Date/Time End: 1988-08-17T12:00:00 * Elevation: -1379.0 m * Penetration: 1036.6 m * Recovery: 332.83 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 1036.6 m cored; 0 m drilled; 32.1 % recovery
Size:
4 datasets

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