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  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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==Discussion==

==Discussion==

A map of the sediment thickness (isopach) and occurrence of hydrocarbons is an initial step in identifying the [[petroleum system]](s) of a basin. The figure below shows the total Jurassic to Recent sediment thickness and hydrocarbon occurrences in the GOM basin The hydrocarbon occurrences are concentrated in reservoir rocks that range in age from Jurassic to Pleistocene along the northern margin of the basin in the area over transitional crust and thick salt accumulations. Identification of specific subbasinal depocenters within the area of hydrocarbon occurrences is shown in [[:file:Sedimentary-basin-analysis fig4-4.png|Figure 1]]. Hydrocarbon types reflect the composition of the kerogens from which they were generated and provide an estimate of the potential number of [[source rock]]s within the area (see [[:file:Sedimentary-basin-analysis fig4-5.png|Figure 2]]).

A map of the sediment thickness (isopach) and occurrence of hydrocarbons is an initial step in identifying the [[petroleum system]](s) of a basin. The figure below shows the total Jurassic to Recent sediment thickness and hydrocarbon occurrences in the GOM basin The hydrocarbon occurrences are concentrated in reservoir rocks that range in age from Jurassic to Pleistocene along the northern margin of the basin in the area over transitional crust and thick salt accumulations. Identification of specific subbasinal depocenters within the area of hydrocarbon occurrences is shown in [[:file:Sedimentary-basin-analysis fig4-4.png|Figure 1]]. Hydrocarbon types reflect the composition of the kerogens from which they were generated and provide an estimate of the potential number of [[source rock]]s within the area (see [[:file:Sedimentary-basin-analysis fig4-5.png|Figure 2]]).

[[File:Sedimentary-basin-analysis fig4-5.png|thumbnail|left|{{figure number|2}}Modified from<ref name=Grossetal_1995>Gross, O. P., K. C. Hood, L. M. Wenger, and S. C. Harrison, 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>.]]

[[File:Sedimentary-basin-analysis fig4-5.png|thumbnail|right|{{figure number|2}}Modified from<ref name=Grossetal_1995>Gross, O. P., K. C. Hood, L. M. Wenger, and S. C. Harrison, 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>.]]

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==Map of major sand influxes==

==Map of major sand influxes==

Major influxes of sand into the northern GOM margin have shifted laterally from the Late Cretaceous to Recent.<ref name=ch04r114>Winker, C., D., 1982, Cenozoic shelf margins, northwestern Gulf of Mexico: Gulf Coast Assoc. of Geological Societies Transactions, vol. 32, p. 427–448.</ref> Each of these depocenters is related to the progressive filling of the basin margin, shifting the accommodation space basinward. Accommodation space refers to the volume of space available for sediment accumulation—the space resulting from the interaction of tectonic subsidence or uplift, sea level change, and compaction of the underlying sediment. Additionally, the lateral shift of the fluvial systems is recorded by sand-prone facies that document both the primary input area and the lateral shift of the depocenter through time.

Major influxes of sand into the northern GOM margin have shifted laterally from the Late Cretaceous to Recent.<ref name=ch04r114>Winker, C., D., 1982, Cenozoic shelf margins, northwestern Gulf of Mexico: Gulf Coast Assoc. of Geological Societies Transactions, vol. 32, p. 427–448.</ref> Each of these depocenters is related to the progressive filling of the basin margin, shifting the accommodation space basinward. Accommodation space refers to the volume of space available for sediment accumulation—the space resulting from the interaction of tectonic subsidence or uplift, sea level change, and compaction of the underlying sediment. Additionally, the lateral shift of the fluvial systems is recorded by sand-prone facies that document both the primary input area and the lateral shift of the depocenter through time.