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<identifier>oai:HAL:hal-01685513v1</identifier>
<datestamp>2018-01-17</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Types of fluid-related features controlled by sedimentary cycles and fault network in deepwater Nigeria</title>
<creator>Marsset, Tania</creator>
<creator>Ruffine, L.</creator>
<creator>GAY, Aurelien</creator>
<creator>Ker, S.</creator>
<creator>Cauquil, E.</creator>
<contributor>Unité de recherche Géosciences Marines (Ifremer) (GM) ; Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Total E&P ; Total E&P</contributor>
<source>ISSN: 0264-8172</source>
<source>Marine and Petroleum Geology</source>
<publisher>Elsevier</publisher>
<identifier>hal-01685513</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01685513</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01685513</source>
<source>Marine and Petroleum Geology, Elsevier, 2018, 89, pp.330-349. 〈10.1016/j.marpetgeo.2017.10.004〉</source>
<identifier>DOI : 10.1016/j.marpetgeo.2017.10.004</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marpetgeo.2017.10.004</relation>
<language>en</language>
<subject lang=en>Niger delta</subject>
<subject lang=en>Fluid flow</subject>
<subject lang=en>Pockmark</subject>
<subject lang=en>Gas hydrates</subject>
<subject lang=en>Methane-derived carbonate</subject>
<subject lang=en>Fault network</subject>
<subject lang=en>Sedimentary cycles</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>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).</description>
<date>2018-01</date>
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