Sterols as source indicators of organic materials in sediments

Details Sterols as source indicators of organic materials in sediments Sterols as source indicators of organic materials in sediments

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gecoa..40..323h&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 40, Issue 3, pp.323-330

Computer Science

12

Scientific paper

The sterol contents of plankton and sediment samples have been determined. Cholesterol, 22-dehydrocholesterol, brassicasterol, campesterol, 24-methylenecholesterol, stigmasterol, and -sitosterol are the major sterols in these samples. Systematic variations have been observed in the compositions of the sterols from bay and Gulf of Mexico plankton and from sediments collected in the mouth of the Aransas River, Capano Bay, Aransas Bay, Corpus Christi Bay and the Gulf near Port Aransas. The concentration of cholesterol increases as the concentration of -sitosterol decreases in the sample sequence of river inlet sediments-bay sediments-Gulf sediments-bay and Gulf plankton. Calculations based on either the cholesterol or the -sitosterol contents of the sterol fractions of the fresh water sediments and the Gulf plankton and sediments suggest that 34% of the sterols in the Gulf sediments are derived from terrigenous sources.

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