Katz, Barry J (2001): Total organic carbon content, methane isotopic composition and hydrocarbon characteristics of ODP Leg 180 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.787055, Supplement to: Katz, BJ (2001): Geochemical investigation of Sites 1108 and 1109, Leg 180. In: Huchon, P; Taylor, B; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 180, 1-19, https://doi.org/10.2973/odp.proc.sr.180.151.2001
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Abstract:
The organic geochemistry of Sites 1108 and 1109 of the Woodlark Basin, offshore Papua New Guinea, was studied to determine whether thermally mature hydrocarbons were present in the penetrated section and, if present, whether they are genetically related to the penetrated "coaly" interval. Both the organic carbon and pyrolysis data indicate that there is no significant hydrocarbon source-rock potential at Site 1108. The hydrocarbons encountered during drilling appear to be indigenous and not migrated products or contaminants. In contrast, the coaly interval at Site 1109 contains zones with significant hydrocarbon-generation potential. Several independent lines of evidence indicate that the coaly sequence encountered at Site 1109 is thermally immature.
The Site 1108 methane stable-carbon isotope composition does not display a clear trend with depth as would be expected if it was solely reflecting a maturation profile. The measured isotopic composition of methane has most probably been altered by fractionation during sample handling and storage. This fractionation would result in isotopically heavier values than would be obtained on free gas. The organic geochemical data gathered indicate that Site 1108 can be safely revisited and that the organic-rich sediments encountered at Site 1109 were not the source of the gas encountered at Site 1108.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -9.625865 * Median Longitude: 151.599145 * South-bound Latitude: -9.745400 * West-bound Longitude: 151.572580 * North-bound Latitude: -9.506330 * East-bound Longitude: 151.625710
Date/Time Start: 1998-06-17T15:30:00 * Date/Time End: 1998-07-04T00:15:00
Event(s):
180-1108B * Latitude: -9.745400 * Longitude: 151.625710 * Date/Time Start: 1998-06-17T15:30:00 * Date/Time End: 1998-06-24T09:00:00 * Elevation: -3177.2 m * Penetration: 485.2 m * Recovery: 148.58 m * Location: Solomon Sea * Campaign: Leg180 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 51 core; 485.2 m cored; 0 m drilled; 30.6 % recovery
180-1109D * Latitude: -9.506330 * Longitude: 151.572580 * Date/Time Start: 1998-06-27T08:00:00 * Date/Time End: 1998-07-04T00:15:00 * Elevation: -2211.0 m * Penetration: 802 m * Recovery: 299.87 m * Location: Solomon Sea * Campaign: Leg180 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 51 core; 449.2 m cored; 352.8 m drilled; 66.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Katz, BJ (2001): (Table T3) Stable carbon isotope composition of methane in samples of ODP Hole 180-1108B. https://doi.org/10.1594/PANGAEA.787053
- Katz, BJ (2001): (Table T1) Total organic carbon content, hydrocarbon characteristics and hydrogen and oxygen index of samples from ODP Hole 180-1108B. https://doi.org/10.1594/PANGAEA.787051
- Katz, BJ (2001): (Table T4) Total organic carbon content, bitumen yield and hydrocarbon characteristics of samples from ODP Hole 180-1109D. https://doi.org/10.1594/PANGAEA.787054
- Katz, BJ (2001): (Table T2) Total organic carbon content, hydrocarbon characteristics and hydrogen and oxygen index of samples from ODP Hole 180-1109D. https://doi.org/10.1594/PANGAEA.787052