@misc{51650, type = "Article", year = "2018", title = "Types of fluid-related features controlled by sedimentary cycles and fault network in deepwater Nigeria", journal = "Marine And Petroleum Geology", editor = "Elsevier Sci Ltd", volume = "89", number = "Part.2", pages = "330-349", author = "Marsset Tania, Ruffine Livio, Ker Stephan, Cauquil E., Gay Aurelien", url = "", organization = "", address = "FRANCE", doi = "https://doi.org/10.1016/j.marpetgeo.2017.10.004", abstract = "
The seismic characteristics of focused fluid-related features such as pockmarks and carbonate build-ups on the Nigerian continental slope have been investigated using complementary seismic data sets (reprocessed 3D exploration data and 2D Very High Resolution hull-mounted and near-bottom seismic data) coupled with the results of previous studies (sedimentological, geotechnical and geochemical analyses).
The results show different types of fluid-related features within the hemipelagic phase of long duration (∼1 Myr) Turbidite/Hemipelagic cycles. They are the product of the disturbance of the hosting sediments following two main distinct processes: (1) no or low sediment deposition caused by fluid escape associated with seafloor settlement (benthic fauna, carbonate precipitation, gas hydrate formation) and (2) post-depositional erosion, caused either by fluid release (dewatering from underlying features such as channels and upward migration from a deep source) or by collapse (destabilisation of gas hydrates). The temporal evolution reveals a decrease in fluid flow during the hemipelagic deposition as witnessed by the decrease in methanogenic activity and by gas hydrate destabilisation. The spatial distribution of fluid-related features seems to be controlled by the type of fault (small fault or structural lineament).
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