Effect of biodegradation on vanadylporphyrin distribution

Details Effect of biodegradation on vanadylporphyrin distribution Effect of biodegradation on vanadylporphyrin distribution

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.2283s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 57, Issue 10, pp.2283-2290

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Scientific paper

Oils, tars, and degraded oils of varying degrees of biodegradation occur in the Permian Phosphoria Formation along the eastern flank of the Wind River mountains, Wyoming, USA. Biodegradation has altered the isomer distributions of steranes, the hopanes, and the mono- and triaromatised steroids in these oils. The conventional maturity parameters based on these biomarkers are of limited use in estimating their maturity. On the other hand, even in severely biodegraded oils the vanadylporphyrin distributions are unaltered. Because of this, the Porphyrin Maturity Parameter (PMP) derived from the vanadylporphyrin distribution is an ideal parameter for estimating the maturity of these oils. This study also confirms the previous observation that T s and T m are unaffected by even severe biodegradation.

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