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Sequence Stratigraphic Responses to Shoreline-Perpendicular Growth Faulting in Shallow Marine Reservoirs of the Champion Field, Offshore Brunei Darussalam, South China Sea: Discussion

¹ 5430 Dumfries, Houston, Texas, 77096; marc@marcedwards.com

The first 20% of the full text of this article appears below.

I do not agree with the conclusion reached by Hodgetts et al. (2001) that a deltaic shoreline in two adjacent growth fault blocks was simultaneously prograding and retrograding, for reasons explained in this article. My principal objection is illustrated in their figure 14. The block diagram and paleoenvironmental map (Hodgetts et al., 2001, figure 14c, d) show the onset of growth faulting. As the fault begins to offset the depositional surface, Hodgetts et al. (2001) argue that the greater subsidence associated with the hanging-wall (downthrown) block caused updip migration of the shoreline, while the shoreline continued to prograde in the footwall (upthrown) block. If, however, offset on the fault yielded no more than several meters of relief on the sea floor, then the delta would merely heal the surface and continue to prograde in the hanging-wall block, where the succession would be thicker than in the footwall block (overall layer thickening). This is what is observed in numerous cases in the northern Gulf of Mexico Basin (e.g., Curtis, 1970; Curtis and Picou, 1978) and the Niger Delta (Weber, 1971). Several examples that I have studied and described in publications include the Paleocene-Eocene Wilcox Group (Edwards, 1980, 1981; Winker and Edwards, 1983); the Oligocene Frio Formation (Edwards, 1995), the Eocene Yegua Formation (Edwards, 1990, 1991), and the lower Miocene (Edwards, 1994, . . . [Full Text of this Article]

This article has been cited by other articles:

				A. O. Owoyemi and B. J. Willis Depositional Patterns Across Syndepositional Normal Faults, Niger Delta, Nigeria Journal of Sedimentary Research, February 1, 2006; 76(2): 346 - 363. [Abstract] [Full Text] [PDF]

				Sequence Stratigraphic Responses to Shoreline-Perpendicular Growth Faulting in Shallow Marine Reservoirs of the Champion Field, Offshore Brunei Darussalam, South China Sea: Reply AAPG Bulletin, May 1, 2002; 86(5): 922 - 924.