Carbon and nitrogen isotopic compositions of alkyl porphyrins from the Triassic Serpiano oil shale

Details Carbon and nitrogen isotopic compositions of alkyl porphyrins from the Triassic Serpiano oil shale Carbon and nitrogen isotopic compositions of alkyl porphyrins from the Triassic Serpiano oil shale

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.1307i&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 57, Issue 6, pp.1307-1311

Mathematics

Logic

7

Scientific paper

The carbon and nitrogen isotopic compositions of seven of the most abundant alkylporphyrins from the Serpiano oil shale (marine, Triassic) were determined. For the C 31 and C 32 butanoporphyrins, values of 13 C PDB and 15 N AIR averaged -24.0 and -3.1 . In contrast, the C 31 and C 32 methylpropanoporphyrins, DPEP, and a C 30 13-nor etioporphyrin had 13 C and 15 N values averaging -27.5 and -3.3%., respectively. Carbon and nitrogen isotopic values for kerogen averaged -30.8 and -0.9, whereas those for total extract averaged -31.6, and -4.0 . The butanoporphyrins apparently derive from a biological source different from that giving rise to the other porphyrins, their 13 C enrichment not being related to carbon isotopic fractionation accompanying diagenetic reactions. The 13 N values for all the porphyrins indicate that the depletion of 15 N observed in the kerogen is of primary origin. Consistent with the very high abundance of hopanoids and methyl hopanoids in the aliphatic hydrocarbon fraction, it is suggested that cyanobacterial fixation of N 2 may have been the main cause of 15 N depletion.

Affiliated with

Also associated with

No associations

Rating

Carbon and nitrogen isotopic compositions of alkyl porphyrins from the Triassic Serpiano oil shale 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 Carbon and nitrogen isotopic compositions of alkyl porphyrins from the Triassic Serpiano oil shale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbon and nitrogen isotopic compositions of alkyl porphyrins from the Triassic Serpiano oil shale will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1444298