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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 61 (1977)

Issue: 4. (April)

First Page: 504

Last Page: 510

Title: Color of Kerogen as Index of Organic Maturity

Author(s): K. E. Peters (2), R. Ishiwatari (3), I. R. Kaplan (2)


Kerogen from the Tanner basin off southern California was heated under nitrogen at different temperatures and times and subsequently was studied under the transmitted light microscope. Samples darken in color from yellow through shades of brown to black with increasing thermal maturation. The transition from dark brown to very dark brown marks the range of maximum n-alkane generation where the residue attains an atomic H/C of about 0.80 ± 0.05. The apparent activation energy for this transition was about 45 ± 5 kcal per mole.

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