Organic geochemistry of ODP Leg 135 sediment samples
| Cobertura |
MEDIAN LATITUDE: -20.897532 * MEDIAN LONGITUDE: -176.458082 * SOUTH-BOUND LATITUDE: -23.346000 * WEST-BOUND LONGITUDE: -177.862000 * NORTH-BOUND LATITUDE: -18.501000 * EAST-BOUND LONGITUDE: -175.297000 * DATE/TIME START: 1990-12-21T20:35:00 * DATE/TIME END: 1991-02-10T20:30:00 |
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| Data(s) |
28/11/1994
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| Resumo |
The average total organic carbon (TOC) content obtained after Rock-Eval/TOC analysis of 156 sediment samples from the eight sites cored during Leg 135 is 0.05%. Hence, the TOC content of Leg 135 sediments is extremely low. The organic matter that is present in these samples is probably mostly reworked and oxidized material. Ten sediment samples were selected for extraction and analysis by gas chromatography and gas chromatography-mass spectrometry. Very low amounts of extractable hydrocarbons were obtained and some aspects of the biomarker distributions suggest that these hydrocarbons are not representative of the organic matter indigenous to the samples. A sample of an oil seep from Pili, Tongatapu was also analyzed. The seep is a biodegraded, mature oil that shows many characteristics in common with previously published analyses of oil seeps from Tongatapu. Biomarker evidence indicates that its source is a mature, marine carbonate of probable Late Cretaceous-Early Tertiary age. The source rock responsible for the Tongatapu oil seeps remains unknown. |
| Formato |
application/zip, 3 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.803124 doi:10.1594/PANGAEA.803124 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Fowler, Martin G (1994): Organic geochemistry of sediments from Leg 135 (Lau Basin) and of an oil seep (Tonga). In: Hawkins, J; Parson, L; Allan, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 135, 667-676, doi:10.2973/odp.proc.sr.135.125.1994 |
| Palavras-Chave | #13beta(H),17alpha(H) 20S-diacholestane/5alpha(H),14alpha(H),17alpha(H) 20R-cholestane; 17alpha(H)-hopane/17beta(H)-moretane; 17alpha(H)-norhopane/17alpha(H)-hopane; 18alpha(H)-trisnorhopane/17alpha(H)-trisnorhopane; 22S/22S+22R 17alpha(H)-bishomohopanes; 5alpha(H),14alpha(H),17alpha(H) 20S/5alpha(H),14alpha(H).17alpha(H) 20R-C, sterane; 5alpha(H),14beta(H),17beta(H)/5alpha(H),14beta(H),l7beta(H)+5alpha(H),14alpha(H)17alpha(H)C29 steranes; Aromatics; at the top of the S2 peak:; C17/C27; C21 sterane/5alpha(H),14alpha(H),17alpha(H) 20R-C29 sterane; C23 tricyclic terpane/17alpha(H)-hopane; C27. Normalized proportion of C27:C28:C29 5alpha(H),14beta(H),17beta(H) steranes from m/z 218 fragmentograms; C28. Normalized proportion of C27:C28:C29 5alpha(H),14beta(H),17beta(H) steranes from m/z 218 fragmentograms; C29. Normalized proportion of C27:C28:C29 5alpha(H),14beta(H),17beta(H) steranes from m/z 218 fragmentograms; Carbon, organic, total; Carbon dioxide yield, S3 per unit sediment mass; Depth; DEPTH, sediment/rock; Event; evolved (distilled or thermovaporitized) at 300°C; evolved at 300°C and up to 390°C; evolved during heating at 25°C/min between 300° and 600°C; Extract; HC; HI, HC/TOC; Hydrocarbons; Hydrocarbon yield, S1 per unit sediment mass; Hydrocarbon yield, S2 per unit sediment mass; Hydrogen index, mass HC per unit mass total organic carbon; in total extract; Label; mbsf; n-Heptane/n-Heptacosane ratio; Ocean Drilling Program; ODP; ODP sample designation; of org C; OI, CO2/TOC; Oxygen index, mass CO2 per unit mass total organic carbon; PI; Pr/C17; Pr/Phy; Pristane/n-heptadecane ratio; Pristane/Phytane ratio; Production index, S1/(S1+S2); Pyrolysis temperature maximum; Ratio; resins + asphaltenes in total extract; Rock eval pyrolysis (Behar et al., 2001); S1/sed; S2/sed; S3/sed; Sample code/label; Sat HC; Saturated hydrocarbon fraction; Sum; Tmax; TOC |
| Tipo |
Dataset |
