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AAPG Bulletin
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AAPG Bulletin; Year: 2021; Issue: March DOI: 10.1306/08192019076
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Figure 9. Sofer-type plot of δ13C isotopic composition (Sofer, 1984) of the saturated and aromatic hydrocarbon fractions of Huron member solvent extracts in this study. The diagonal line separates waxy oil (derived from terrigenous organic matter) from nonwaxy oil (derived from marine organic matter). Average Berea and Ohio Shale-reservoired (n = 23) and lower Paleozoic-reservoired (n = 34) oil from eastern (E.) Ohio according to data from GeoMark (2015) shown for comparison. Data fields for E. Kentucky Ohio Shale and Sunbury Shale solvent extracts and Berea oils from Hackley et al. (2021, this issue); Huron data (dots) from this study.
Figure 9. Sofer-type plot of δ13C isotopic composition (Sofer, 1984) of the saturated and aromatic hydrocarbon fractions of Huron member solvent extracts in this study. The diagonal line separates waxy oil (derived from terrigenous organic matter) from nonwaxy oil (derived from marine organic matter). Average Berea and Ohio Shale-reservoired (n = 23) and lower Paleozoic-reservoired (n = 34) oil from eastern (E.) Ohio according to data from GeoMark (2015) shown for comparison. Data fields for E. Kentucky Ohio Shale and Sunbury Shale solvent extracts and Berea oils from Hackley et al. (2021, this issue); Huron data (dots) from this study.