Computer Science
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.1367s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 57, Issue 6, pp.1367-1377
Computer Science
2
Scientific paper
The distributions of nickel and vanadyl porphyrins of Toarcian shale, northern Germany, and the Monterey Formation, California, were examined. The compositions of nickel and vanadyl porphyrin fractions of extracts from the same sample show substantial differences. The nickel porphyrin distribution is more complex than the vanadyl porphyrin distribution. While the vanadyl porphyrin distributions of samples from a core are the same, their nickel porphyrin compositions show wide variations. The nickel porphyrins are enriched in "etio" and 3-nor C 30 DPEP structures. The vanadyl porphyrins are enriched in the C 33 DiDPEP structure. Methylpropano porphyrins are found only in the vanadyl porphyrin fraction, whereas the cycloheptano structural type is predominant in the nickel fraction. C 31 DPEP and C 32 DPEP are found both in the nickel and vanadyl fractions. Their relative abundance in the two fractions is proportional to the Ni / VO porphyrin ratio. The observed differences in the compositions of nickel and vanadyl porphyrin fractions are due to differences in the rate constants for their formation from the pheopigments.
Boreham Christopher J.
Sundararaman Padmanabhan
No associations
LandOfFree
Comparison of nickel and vanadyl porphyrin distributions of sediments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Comparison of nickel and vanadyl porphyrin distributions of sediments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of nickel and vanadyl porphyrin distributions of sediments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1444344