NDLI: Preliminary assessment of organic geochemical signals in sediments from Hole 893A, Santa Barbara Basin, Offshore California

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Preliminary assessment of organic geochemical signals in sediments from Hole 893A, Santa Barbara Basin, Offshore California

Content Provider	Semantic Scholar
Author	Hinrichs, K.-U. Rullkoetter, Juergen Stein, Ruediger
Copyright Year	1995
Abstract	Preliminary results of molecular organic geochemical analyses of 26 samples from Hole 893A are reported in this paper. Detailed lipid analyses of 10 selected samples show a complex molecular composition of marine, terrestrial, and bacterial origin. Numerous steroidal alcohols of predominantly autochthonous origin form the major compound class in the bitumen. Higher plant-derived long-chain rc-fatty acids, rc-alcohols, and «-alkanes are also present in significant concentrations. The hydrocarbon fractions of all investigated samples contain a series of 17α(H)-hopanes that show a signature typical of biodegraded petroleum. These compounds are derived from eroded Monterey Formation petroleum source rocks or related oil seeps, or—considered less likely—from local migration of oil from greater depths. Several molecular parameters appear to distinguish laminated from nonlaminated sediments.
Starting Page	201
Ending Page	211
Page Count	11
File Format	PDF HTM / HTML
DOI	10.2973/odp.proc.sr.146-2.307.1995
Volume Number	146
Alternate Webpage(s)	http://www-odp.tamu.edu/publications/146_2_SR/VOLUME/CHAPTERS/sr146pt2_14.pdf
Alternate Webpage(s)	https://doi.org/10.2973/odp.proc.sr.146-2.307.1995
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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