Hunt, John M (1975): C4-C7 alkenones in deep sea sediments. PANGAEA, https://doi.org/10.1594/PANGAEA.770334, Supplement to: Hunt, JM (1975): Origin of gasoline range alkanes in the deep sea. Nature, 254(5499), 411-413, https://doi.org/10.1038/254411a0
Always quote above citation when using data! You can download the citation in several formats below.
It is believed that C4 to C7 hydrocarbons in petroleum are formed by the cracking of organic matter at depths generally exceeding 1,000 m at temperatures in excess of 50 °C (Cordel, 1972; Dow, 1974; Tissot et al., 1974)). Also, none of the alkanes in the butane-heptane range are formed biologically as far as is known at present. Consequently, it is thought that they do not occur in shallow, Recent sediments. In 1962, I analysed 22 samples of Recent sediments from 7 different environments and verified that these hydrocarbons were not present at the p.p.m. level (Dunton and Hunt, 1962) although traces of a few hydrocarbons such as butane, isobutane, isopentane and n-heptane have been found (Sokolov, 1957; Veber and Turkeltaub, 1958; Erdman et al., 1958; Emery and Hoggan, 1958). No identification of individual hexanes or heptanes has been reported except when there has been clear evidence of seepage from deeper source sediments (McIver, 1973).
Median Latitude: -5.328226 * Median Longitude: 143.807891 * South-bound Latitude: -48.957300 * West-bound Longitude: 39.369200 * North-bound Latitude: 39.494700 * East-bound Longitude: -92.043300
Date/Time Start: 1968-08-20T00:00:00 * Date/Time End: 1973-07-26T00:00:00
1-3 * Latitude: 23.030000 * Longitude: -92.043300 * Date/Time: 1968-08-20T00:00:00 * Elevation: -3747.0 m * Penetration: 627.9 m * Recovery: 46.6 m * Location: Gulf of Mexico/PLAIN * Campaign: Leg1 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 11 cores; 99.2 m cored; 0 m drilled; 47 % recovery
22-217 * Latitude: 8.926200 * Longitude: 90.538800 * Date/Time: 1972-02-24T00:00:00 * Elevation: -3010.0 m * Penetration: 614.5 m * Recovery: 181.6 m * Location: Indian Ocean//RIDGE * Campaign: Leg22 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 35 cores; 326.5 m cored; 9.5 m drilled; 55.6 % recovery
22-218 * Latitude: 8.007000 * Longitude: 86.282800 * Date/Time: 1972-03-01T00:00:00 * Elevation: -3749.0 m * Penetration: 773 m * Recovery: 59 m * Location: Indian Ocean//FAN * Campaign: Leg22 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 251 m cored; 0 m drilled; 23.5 % recovery