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Identification and characterization of fluid escape structures (pockmarks) in the Estremadura Spur, West Iberian Margin

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Title
Identification and characterization of fluid escape structures (pockmarks) in the Estremadura Spur, West Iberian Margin
Other Titles
Iberian Margin 서쪽, Estremadura Spu에서의 pockmar 구조 발견 및 특성 파악
Authors
D. Duarte
H. Duarte
Kim, Junghyun
O. Benazzouz
L.M. Pinheiro
P. Madureira
C. Ribeiro
P. Terrinha
V.H. Magalh~a
Subject
Geology
Keywords
Estremadura Spur; Fluid migration; Pockmarks
Issue Date
2017
Citation
D. Duarte, et al. 2017. "Identification and characterization of fluid escape structures (pockmarks) in the Estremadura Spur, West Iberian Margin". MARINE AND PETROLEUM GEOLOGY, 82(0): 414-423.
Abstract
The analysis of the seismic profiles allowed the identification of six seismic units, disturbed by the migration and accumulation of fluids. The Estremadura Spur outer shelf has been affected by several episodes of fluid migration and fluid escape during the Pliocene-Quaternary that are expressed by a vast number of seabed and buried pockmarks. At present, the pockmarks are mainly inactive, as the seabed pockmarks are covered by recent sediments. It is concluded that the migration of fluids to the seabed occurred over the Pliocene-Quaternary, as indicated by the buried pockmarks at different depths below the seabed. The vertical stacking of various pockmarks suggests a cyclical fluid flow activity that can possibly be the result of the eustatic sea level variations and the subsequent changes of the hydrostatic pressure.
URI
http://repository.kopri.re.kr/handle/201206/6288
DOI
http://dx.doi.org/10.1016/j.marpetgeo.2017.02.026
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