Whelan, Jean K; Hunt, John M (1982): C1-C8 hydrocarbons in DSDP Leg 64 Holes sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.818767, Supplement to: Whelan, JK; Hunt, JM (1982): C1-C8 hydrocarbons in Leg 64 sediments, Gulf of California. In: Curray, JR; Moore, DG; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 64, 763-779, https://doi.org/10.2973/dsdp.proc.64.123.1982
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Abstract:
Sediments from the Baja California Continental Margin Transect - Sites 474 and 476 - showed small amounts of C2-C8 hydrocarbons and functionalized compounds (alkenes) typical of organic-rich, Recent, cold (<30°C) marine sediments. In contrast, some samples from Sites 477, 478, 479, and Hole 481A in the Guaymas Basin, an active spreading center, showed the characteristics of thermally generated hydrocarbons. These include an increase (sometimes exponential) in amount and diversity of C2-C8 hydrocarbons and a decrease in alkenes in more thermally mature sediments. The results indicate that the injection of basaltic sills has minimal effect on C2-C8 hydrocarbon generation except in the immediate vicinity of the sill. The absence of light hydrocarbons close to the hottest sills suggests that the compounds distill away as they are formed in these areas of very active hydrothermal circulation. A sample of young sediment exposed to very high temperatures (>300°C) from deeper thermal sources at the hottest site, 477, showed a very limited hydrocarbon distribution, including primarily ethane, benzene, and toluene, together with smaller amounts of propane and butane.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 26.339437 * Median Longitude: -110.928356 * South-bound Latitude: 22.962000 * West-bound Longitude: -111.624800 * North-bound Latitude: 27.846000 * East-bound Longitude: -108.980700
Date/Time Start: 1978-12-02T00:00:00 * Date/Time End: 1979-01-03T00:00:00
Event(s):
64-474 * Latitude: 22.962000 * Longitude: -108.980700 * Date/Time: 1978-12-02T00:00:00 * Elevation: -3023.0 m * Penetration: 182.5 m * Recovery: 77.2 m * Location: North Pacific/Gulf of California/BASIN * Campaign: Leg64 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 173 m cored; 9.5 m drilled; 44.6 % recovery
64-476 * Latitude: 23.040500 * Longitude: -109.089200 * Date/Time: 1978-12-14T00:00:00 * Elevation: -2403.0 m * Penetration: 297.5 m * Recovery: 167 m * Location: North Pacific/Gulf of California/TERRACE * Campaign: Leg64 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 336 m cored; 0 m drilled; 49.7 % recovery
64-477 * Latitude: 27.030800 * Longitude: -111.400300 * Date/Time: 1978-12-18T00:00:00 * Elevation: -2003.0 m * Penetration: 191 m * Recovery: 50.6 m * Location: North Pacific/Gulf of California/BASIN * Campaign: Leg64 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 cores; 172 m cored; 19 m drilled; 29.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Whelan, JK; Hunt, JM (1982): (Table 1) C1-C8 volatile compounds in DSDP Leg 64 Holes. https://doi.org/10.1594/PANGAEA.818765
- Whelan, JK; Hunt, JM (1982): (Table 4) Thermal distillation-pyrolysis at DSDP Leg 64 Holes. https://doi.org/10.1594/PANGAEA.818766