The effect of maturation on the configuration of pristane in sediments and petroleum

Details The effect of maturation on the configuration of pristane in sediments and petroleum The effect of maturation on the configuration of pristane in sediments and petroleum

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42.1871p&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 42, Issue 12, pp.1871-1875

Mathematics

Logic

5

Scientific paper

The absolute stereochemistry of pristane in a sample of contemporary marine Zooplankton, Messel shale (Germany) and Djatibarang (Java) crude has been determined by gas Chromatographic methods. The relative stereochemistry in Irati shale (Brazil), Green River (U.S.) crude, Halibut (Australia) crude has also been determined, and confirmed for a sample of the Green River shale. The stereoisomer distributions indicate a loss of stereospecificity of the phytol-derived 6(R),10(S) pristane with increasing geological maturation. For example, the least mature geological sample, the Eocene Messel shale, contains solely the 6(R),10(S) isomer, whereas a mature sample, Djatibarang crude, contains 50% of the 6(R),10(S) isomer and 25% of each of the 6(R),10(R) and 6(S),10(S) isomers.

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