C4-C7 alkenones in deep sea sediments

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...

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Bibliographic Details
Main Author: Hunt, John M
Format: Dataset
Language:English
Published: PANGAEA 1975
Subjects:
1-3
22-217
22-218
24-233A
26-250A
26-254
29-280A
29-282
31-299
5-34
Antarctic Ocean/CONT RISE
Antarctic Ocean/Tasman Sea
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Gulf of Mexico/PLAIN
Indian Ocean//BASIN
Indian Ocean//FAN
Indian Ocean//RIDGE
Indian Ocean/Gulf of Aden/TRENCH
Leg1
Leg22
Leg24
Leg26
Leg29
Leg31
Leg5
North Pacific/Japan Sea
North Pacific/PLAIN
Antarctic
Pacific
Indian
Antarctic Ocean
Antarc*
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.770334
https://doi.org/10.1594/PANGAEA.770334
Description
Summary: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).

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