Unknown
PANGAEA
In:
Supplement to: Rullkötter, Jürgen; Mukhopadhyay, Prasanta K; Welte, Dietrich Hugo (1984): Geochemistry and petrography of organic matter in sediments from Hole 530A, Angola Basin, and Hole 532, Walvis Ridge, Deep Sea Drilling Project. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 1069-1087, https://doi.org/10.2973/dsdp.proc.75.138.1984
Publication Date:
2023-06-27
Description:
Seventeen sediment samples of Albian-Cenomanian to early Pliocene age from DSDP Hole 530A in the Angola Basin and six sediment samples of early Pliocene to late Pleistocene age from the Walvis Ridge were investigated by organic geochemical methods, including organic carbon determination, Rock-Eval pyrolysis, gas chromatography and combined gas chromatography/mass spectrometry of extractable hydrocarbons, and kerogen microscopy. The organic matter in all samples is strongly influenced by a terrigenous component from the nearby continent. The amount of marine organic matter present usually increases with the total organic carbon content, which reaches an extreme value of more than 10% in a Cenomanian black shale from Hole 530A. At Site 530 the extent of preservation of organic matter in the deep sea sediments is related to mass transport down the continental slope, whereas the high organic carbon contents in the sediments from Site 532 reflect both high bioproductivity in the Benguela upwelling regime and considerable supply of terrigenous organic matter. The maturation level of the organic matter is low in all samples.
Keywords:
75-530A; 75-532; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg75; South Atlantic; South Atlantic/RIDGE
Type:
Dataset
Format:
application/zip, 2 datasets
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