Changes

==Early Tertiary source?==

==Early Tertiary source?==

[[file:sedimentary-basin-analysis_fig4-5.png|300px|thumb|{{figure number|2}}Map of hydrocarbon types.]]

[[file:sedimentary-basin-analysis_fig4-5.png|300px|thumb|{{figure number|2}}Map of hydrocarbon types. Modified from Gross et al. (1995).]]

[[file:sedimentary-basin-analysis_fig4-9.png|thumb|500px|{{figure number|3}}Model of salt deformation.]]

[[file:sedimentary-basin-analysis_fig4-9.png|thumb|500px|{{figure number|3}}Model of salt deformation. From Hall et al. (1993); courtesy Gulf Coast SEPM.]]

Gross et al.<ref name=ch04r40>Gross, O., P., Hood, K., C., Wenger, L., M., Harrison, S., C., 1995, Seismic imaging and analysis of source and [[migration]] within an integrated hydrocarbon system study, northern Gulf of Mexico basin: Abstracts, 1st Latin American Geophysical conference, p. 1–4.</ref> suggest that the oil of the East Breaks–High Island area originated from either lower [[Tertiary]] mudstones or uppermost Jurassic mudstones ([[:file:sedimentary-basin-analysis_fig4-5.png|Figure 2]]). Philippi<ref name=ch04r74>Philippi, G., T., 1974, The influence of marine and terrestrial source material on the composition of petroleum: Geochim. Cosmochim. Acta, vol. 38., p. 947–966., 10., 1016/0016-7037(74)90067-2</ref> and Sassen et al.<ref name=ch04r85>Sassen, R., Tye, R., S., Chinn, E., W., Lemoine, R., C., 1988, Origin of crude oil in the Wilcox Trend of Louisiana and Mississippi: evidence of long range migration: Gulf Coast Assoc. Geological Societies Transactions, vol. 38, p. 27–34.</ref> present evidence for source potential for crude oil in the upper Paleocene to lower Eocene Wilcox Formation. If lower Tertiary Wilcox equivalent or uppermost Jurassic mudstones are the source for hydrocarbons in the East Breaks 160-161 field, then a migration avenue must exist through the salt that underlies the minibasin and generation-migration-accumulation must have been delayed until the trap formed approximately 1.2 Ma. In fact, alternative interpretations of salt distribution at the East Breaks 160-161 field suggest a salt weld with sediment-on-sediment below the minibasin rather than a salt floor (compare [[:file:sedimentary-basin-analysis_fig4-8.png|Figures 1]] and [[:file:sedimentary-basin-analysis_fig4-9.png|3]]). This suggests migration could have occurred from even older, more deeply buried source rocks.

Gross et al.<ref name=ch04r40>Gross, O., P., Hood, K., C., Wenger, L., M., Harrison, S., C., 1995, Seismic imaging and analysis of source and [[migration]] within an integrated hydrocarbon system study, northern Gulf of Mexico basin: Abstracts, 1st Latin American Geophysical conference, p. 1–4.</ref> suggest that the oil of the East Breaks–High Island area originated from either lower [[Tertiary]] mudstones or uppermost Jurassic mudstones ([[:file:sedimentary-basin-analysis_fig4-5.png|Figure 2]]). Philippi<ref name=ch04r74>Philippi, G., T., 1974, The influence of marine and terrestrial source material on the composition of petroleum: Geochim. Cosmochim. Acta, vol. 38., p. 947–966., 10., 1016/0016-7037(74)90067-2</ref> and Sassen et al.<ref name=ch04r85>Sassen, R., Tye, R., S., Chinn, E., W., Lemoine, R., C., 1988, Origin of crude oil in the Wilcox Trend of Louisiana and Mississippi: evidence of long range migration: Gulf Coast Assoc. Geological Societies Transactions, vol. 38, p. 27–34.</ref> present evidence for source potential for crude oil in the upper Paleocene to lower Eocene Wilcox Formation. If lower Tertiary Wilcox equivalent or uppermost Jurassic mudstones are the source for hydrocarbons in the East Breaks 160-161 field, then a migration avenue must exist through the salt that underlies the minibasin and generation-migration-accumulation must have been delayed until the trap formed approximately 1.2 Ma. In fact, alternative interpretations of salt distribution at the East Breaks 160-161 field suggest a salt weld with sediment-on-sediment below the minibasin rather than a salt floor (compare [[:file:sedimentary-basin-analysis_fig4-8.png|Figures 1]] and [[:file:sedimentary-basin-analysis_fig4-9.png|3]]). This suggests migration could have occurred from even older, more deeply buried source rocks.