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AAPG Bulletin
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AAPG Bulletin; Year: 2020; Issue: June DOI: 10.1306/0122201618217407
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Figure 19. Ternary plot of 1,3,7-trimethylnapthalene/1,3,7- + 1,2,5,7-trimethylnapthalene (trimethylnaphthalene ratio [TMNr]), 1,3,6,7-tetramethynapthalene/1,3,6,7- + 1,2,5,6- + 1,2,3,6-tetramethylnaphthalanes (tetramethylnaphthalene ratio [TeMNr]), and 1,2,4,6,7-pentamethylnaphthalane/1,2,4,6,7- + 1,2,3,5-6-pentamethylnaphthalane (pentamethylnaphthalene ratio [PMNr]). Showing most Niger Delta oil samples plotting outside the maturity center (indicated by the dashed circle), which indicates mixing of oils with different maturities, or with indigenous organic matter or biodegradation effects (modified after van Aarssen et al., 1999).
Figure 19. Ternary plot of 1,3,7-trimethylnapthalene/1,3,7- + 1,2,5,7-trimethylnapthalene (trimethylnaphthalene ratio [TMNr]), 1,3,6,7-tetramethynapthalene/1,3,6,7- + 1,2,5,6- + 1,2,3,6-tetramethylnaphthalanes (tetramethylnaphthalene ratio [TeMNr]), and 1,2,4,6,7-pentamethylnaphthalane/1,2,4,6,7- + 1,2,3,5-6-pentamethylnaphthalane (pentamethylnaphthalene ratio [PMNr]). Showing most Niger Delta oil samples plotting outside the maturity center (indicated by the dashed circle), which indicates mixing of oils with different maturities, or with indigenous organic matter or biodegradation effects (modified after van Aarssen et al., 1999).