Mathematics – Logic
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.3893h&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 55, Dec. 1991, p. 3893-3899. Research supported by Geological Society of
Mathematics
Logic
1
Bitumens, Kerogen, Porphyrins, Shales, Spectroscopic Analysis, Concentration (Composition), Mathematical Models, Near Ultraviolet Radiation, Reflectance, Visible Spectrum
Scientific paper
An interpretive model for estimating porphyrin concentration in bitumen and kerogen from spectral reaflectance data in the visible and near-ultraviolet region of the spectrum is derived and calibrated. Preliminary results obtained using the model are consistent with concentrations determined from the bitumen extract and suggest that 40 to 60 percent of the total porphyrin concentration remains in the kerogen after extraction of bitumen from thermally immature samples. The reflectance technique will contribute to porphyrin and kerogen studies and can be applied at its present level of development to several areas of geologic and paleo-oceanographic research.
Gaffey Michael J.
Holden Peter N.
Sundararaman Padmanabhan
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