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Origin of petroporphyrins. 2. Evidence from stable carbon isotopesCompared with the carbon-13 isotopic composition of the ubiquitous C32DPEP (DPEP, deoxophylloerythroetioporphyrin) the heavy but equivalent carbon-13 isotopic composition for the porphyrin structures 15(2)-methyl-15,17-ethano-17-nor-H-C30DPEP and 15,17-butano-, 13,15-ethano-13(2),17-propano-, and 13(1)-methyl-13,15-ethano-13(2),17-propanoporphyrin suggests a common precursor, presumably chlorophyll c, for these petroporphyrins isolated from the marine Julia Creek oil shale and the lacustrine Condor oil shale. Similarly, the heavy but variable carbon-13 isotopic composition of 7-nor-H-C31DPEP compared with C32DPEP is consistent with an origin from both chlorophyll b and chlorophyll c3. The equivalent carbon-13 isotopic composition for 13(2)-methyl-C33DPEP compared with C32DPEP suggests a common origin resulting from a weighted average of chlorophyll inputs.
Document ID
20040090028
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Boreham, C. J.
(Bureau of Mineral Resources Geology and Geophysics, Canberra, Australia)
Fookes, C. J.
Popp, B. N.
Hayes, J. M.
Date Acquired
August 21, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Energy & fuels : an American Chemical Society journal
Volume: 4
Issue: 6
ISSN: 0887-0624
Subject Category
Exobiology
Distribution Limits
Public
Copyright
Other
Keywords
NASA Program Exobiology
NASA Discipline Number 52-30
NASA Discipline Exobiology
Non-NASA Center

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