Unknown
PANGAEA
In:
Supplement to: Snowdon, Lloyd R; Meyers, Philip A (1992): Source and maturity of organic matter in sediments and rocks from Sites 759, 760, 761, and 764 (Wombat Plateau) and Sites 762 and 763 (Exmouth Plateau). In: von Rad, U; Haq, BU; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 122, 309-315, https://doi.org/10.2973/odp.proc.sr.122.131.1992
Publication Date:
2024-01-09
Description:
A summary of shipboard Rock-Eval measurements shows that organic matter in Upper Triassic siltstone from the Wombat Plateau is dominated by Type III kerogen and is thermally immature. Neocomian siltstone from the Exmouth Plateau similarly contain thermally immature Type III organic matter. Overlying Upper Cretaceous to Quaternary carbonates are poor in organic matter at both locations, yet significant amounts of methane-dominated gas are dissolved in the pore waters of the thick carbonate sequence present on the Exmouth Plateau. This dry gas is believed to have migrated from deeper and more mature strata containing Type III kerogen.
Keywords:
122-759B; 122-760B; Carbon, organic, total; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Hydrogen index, mass HC, per unit mass total organic carbon; Joides Resolution; Leg122; Ocean Drilling Program; ODP; Oxygen index, mass CO2, per unit mass total organic carbon; Pyrolysis temperature maximum; Rock eval pyrolysis (Behar et al., 2001); Sample code/label; South Indian Ridge, South Indian Ocean; Stage; Vitrinite reflection
Type:
Dataset
Format:
text/tab-separated-values, 21 data points
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