Changes

[[file:sedimentary-basin-analysis_fig4-50.png|300px|thumb|{{figure number|8}}From Armentrout et al.<ref name=ArmentroutEtAl_1991 />. Courtesy Springer-Verlag.]]

[[file:sedimentary-basin-analysis_fig4-50.png|300px|thumb|{{figure number|8}}From Armentrout et al.<ref name=ArmentroutEtAl_1991 />. Courtesy Springer-Verlag.]]

 

[[:file:sedimentary-basin-analysis_fig4-50.png|Figure 8]] is a block diagram of the depositional model for the ''Glob alt'' reservoir interval. The model shows a 40-50-mi-long (60-80 km) transport system from a shelf-edge delta basinward to the East Breaks 160-161 minibasin. Depositional water depths exceeded [[depth::1000 ft]] (320 m) (upper bathyal), suggesting transport was by gravity-flow processes. Sandstone deposition in the minibasin may have resulted from subtle variations of sea-floor topography, perhaps related to early salt withdrawal.<ref name=ch04r53>Kneller, B., 1995, Beyond the turbidite paradigm: Physical models for deposition of turbidites and their implications for reservoir prediction, ''in'' Hartley, A. J., and D. J. Prosser, eds., Characterization of Deep Marine Clastic Systems: Geological Society, London, Special Publication 94, p. 31–49.</ref> Mass-wasting processes occurred on the slope well to the north of the field, as shown by slump facies on Figure 4-39. The areal extent of the basin-floor sheet is restricted by the areal extent of the East Breaks 160-161 intraslope minibasin.

[[:file:sedimentary-basin-analysis_fig4-50.png|Figure 8]] is a block diagram of the depositional model for the ''Glob alt'' reservoir interval. The model shows a 40-50-mi-long (60-80 km) transport system from a shelf-edge delta basinward to the East Breaks 160-161 minibasin. Depositional water depths exceeded [[depth::1000 ft]] (320 m) (upper bathyal), suggesting transport was by gravity-flow processes. Sandstone deposition in the minibasin may have resulted from subtle variations of sea-floor topography, perhaps related to early salt withdrawal.<ref name=ch04r53>Kneller, B., 1995, Beyond the turbidite paradigm: Physical models for deposition of turbidites and their implications for reservoir prediction, ''in'' Hartley, A. J., and D. J. Prosser, eds., Characterization of Deep Marine Clastic Systems: Geological Society, London, Special Publication 94, p. 31–49.</ref> Mass-wasting processes occurred on the slope well to the north of the field, as shown by slump facies on [[:file:sedimentary-basin-analysis_fig4-39.png|Figure 9]]. The areal extent of the basin-floor sheet is restricted by the areal extent of the East Breaks 160-161 intraslope minibasin.

==Accommodation space==

==Accommodation space==

Differential loading of the mobile salt resulted in some syndepositional subsidence and accommodation of the ''Glob alt'' sand-prone [[isochron]] thick. The apparent thickening into the north-bounding [[growth fault]] is due to the maximum differential subsidence and isochron thickening being coincident with the fault trace of a much younger growth fault phase. Biostratigraphic calibration of the fault system indicates most, if not all, of the fault offset occurred during middle Pleistocene time, after the ''Trifarina rutila bioevent'' (= ''Ang B'') dated at 1.30 Ma (Figure 4-31). This is more than [[length::1.5 m]].y. after deposition of the ''Glob alt'' sands.

Differential loading of the mobile salt resulted in some syndepositional subsidence and accommodation of the ''Glob alt'' sand-prone [[isochron]] thick. The apparent thickening into the north-bounding [[growth fault]] is due to the maximum differential subsidence and isochron thickening being coincident with the fault trace of a much younger growth fault phase. Biostratigraphic calibration of the fault system indicates most, if not all, of the fault offset occurred during middle Pleistocene time, after the ''Trifarina rutila bioevent'' (= ''Ang B'') dated at 1.30 Ma ([[:file:sedimentary-basin-analysis_fig4-31.png|Figure 4-31]]). This is more than [[length::1.5 m]].y. after deposition of the ''Glob alt'' sands.

===Structural trap formation===

===Structural trap formation===