Computer Science
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2439g&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 52, Issue 10, pp.2439-2444
Computer Science
1
Scientific paper
The value of the recently proposed molecular maturity parameter PFI (Pristane Formation Index) is evaluated by analysis of a suite of samples from the Paris Basin with known values of the molecular maturity parameters based on the sterane and hopane isomerization (SI and HI) and sterane aromatization (SA) reactions. The values of the pseudo-kinetic parameters E and A of the Arrhenius equation k = A exp(- E / RT ), calculated for pristane formation in the Mahakam Delta, were used to compare the observed PFI values with calculated ones. The results indicate that the samples from the eastern part of the Paris Basin, which are at the surface at present, have been at higher temperatures for about 10-30 Ma, whereas the deeper samples, located around the center of the Basin, have not undergone considerable temperature changes in the past. These results are in agreement with the conclusions based on SI, SA and HI alone. Thus, the values of the pseudo-kinetic parameters E (59 kJ mol -1 ) and A (2.2*10 -7 s -1 ) for the pristane formation reaction can be applied in a different basin with a different type of kerogen. This confirms the value of PFI as a molecular maturity parameter.
de Lange Frits
de Leeuw Jan W.
Goossens H.
Schenck P. A.
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