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'''Depocenter''' refers to an area or site of maximum deposition, or the geographic location of the thickest part of any specific geographic unit in a depositional basin.<ref name=ch04r37>Gary, M., McAfee, R. Jr., Wolf, C., L., 1974, [https://www.agiweb.org/pubs/glossary/ Glossary of Geology]: AGI, 805 p.</ref>

'''Depocenter''' refers to an area or site of maximum deposition, or the geographic location of the thickest part of any specific geographic unit in a depositional basin.<ref name=ch04r37>Gary, M., R. McAfee, Jr., and C. L. Wolf, 1974, [https://www.agiweb.org/pubs/glossary/ Glossary of Geology]: AGI, 805 p.</ref>

Within a basin, different areas receive different amounts of sediment through time, resulting in numerous depocenters. Each depocenter is an area containing a thick stratigraphic succession. These different depocenters have unique histories of sediment accumulation, compaction, subsidence, [[deformation]], and [[thermal maturation]] of potential hydrocarbon [[source rock]]s. Delineation of these depocenters is the second step in basin analysis. Subdividing a depocenter into age-significant units and depositional cycles is the topic of section C.

Within a basin, different areas receive different amounts of sediment through time, resulting in numerous depocenters. Each depocenter is an area containing a thick stratigraphic succession. These different depocenters have unique histories of sediment accumulation, compaction, subsidence, [[deformation]], and [[thermal maturation]] of potential hydrocarbon [[source rock]]s. Delineation of these depocenters is the second step in basin analysis. Subdividing a depocenter into age-significant units and depositional cycles is the topic of section C.

==Sediment supply rate and facies patterns==

==Sediment supply rate and facies patterns==

Within each depocenter, facies do one of the following:<ref name=ch04r106>Van Wagoner, J., C., Posamentier, H., W., Mitchum, R., M., Vail, P., R., Sarg, J., F., Loutit, T., S., Hardenbol, J., 1988, An overview of the fundamentals of sequence stratigraphy and key definitions: an integrated approach: [http://sp.sepmonline.org/content/sepspsel/1.toc SEPM Special Publication 42], p. 39–45.</ref>

Within each depocenter, facies do one of the following:<ref name=ch04r106>Van Wagoner, J., C., H. W. Posamentier, R. M. Mitchum, P. R. Vail, J. F. Sarg, T. S. Loutit, and J. Hardenbol, 1988, An overview of the fundamentals of sequence stratigraphy and key definitions: an integrated approach: [http://sp.sepmonline.org/content/sepspsel/1.toc SEPM Special Publication 42], p. 39–45.</ref>

* '''Prograde''' if the rate of sediment supply exceeds the rate of [[accommodation]] space formation.

* '''Prograde''' if the rate of sediment supply exceeds the rate of [[accommodation]] space formation.

* '''Aggrade''' if the rate of sediment supply equals the rate of accommodation space formation.

* '''Aggrade''' if the rate of sediment supply equals the rate of accommodation space formation.

Most siliciclastic basins have sediment supplied from drainage areas outside of the boundary of the depositional basin. Lateral changes in sediment input locations can result in lateral shifts in the depocenter if enough space exists to accommodate the sediment near each input location. In carbonate basins, organisms near the site of accumulation produce most sediment, and facies tend to extend over large platform areas.

Most siliciclastic basins have sediment supplied from drainage areas outside of the boundary of the depositional basin. [[Lateral]] changes in sediment input locations can result in lateral shifts in the depocenter if enough space exists to accommodate the sediment near each input location. In carbonate basins, organisms near the site of accumulation produce most sediment, and facies tend to extend over large platform areas.

[[:file:sedimentary-basin-analysis_fig4-12.png|Figure 1]] is a map of the drainage basin of the modern Mississippi River, illustrating the network of rivers feeding into one sediment input point. The Holocene depocenter of the Mississippi River is immediately offshore and west of the river mouth. Smaller drainage basins also supply terrigenous sediment to the western and central Gulf of Mexico, while in situ carbonate factories supply most of the sediment to the Florida peninsula.

[[:file:sedimentary-basin-analysis_fig4-12.png|Figure 1]] is a map of the drainage basin of the modern Mississippi River, illustrating the network of rivers feeding into one sediment input point. The [[Holocene]] depocenter of the Mississippi River is immediately offshore and west of the river mouth. Smaller drainage basins also supply terrigenous sediment to the western and central [[Gulf of Mexico]], while in situ carbonate factories supply most of the sediment to the Florida peninsula.

==Depocenter complexes==

==Depocenter complexes==

* style of fluid entrapment and preservation.

* style of fluid entrapment and preservation.

Recognizing the temporal and spatial distribution of each depocenter is critical to understanding basin history and [[petroleum system]] formation. Along the basin margin, depocenters may be dominated by deltaic complexes. On the slope and basin floor, depocenters are related to transport systems of gravity-flow processes.

Recognizing the temporal and spatial distribution of each depocenter is critical to understanding basin history and [[petroleum system]] formation. Along the basin margin, depocenters may be dominated by deltaic complexes. On the slope and basin floor, depocenters are related to transport systems of [[gravity]]-flow processes.

==Mapping age of thicks==

==Mapping age of thicks==

[[Category:Critical elements of the petroleum system]]  

[[Category:Critical elements of the petroleum system]]  

[[Category:Sedimentary basin analysis]]

[[Category:Sedimentary basin analysis]]