Articles | Volume 9, issue 6
Solid Earth, 9, 1437–1468, 2018
https://doi.org/10.5194/se-9-1437-2018
Solid Earth, 9, 1437–1468, 2018
https://doi.org/10.5194/se-9-1437-2018

Research article 12 Dec 2018

Research article | 12 Dec 2018

Formation of linear planform chimneys controlled by preferential hydrocarbon leakage and anisotropic stresses in faulted fine-grained sediments, offshore Angola

Sutieng Ho et al.

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Subject area: The evolving Earth surface | Editorial team: Stratigraphy, sedimentology, geomorphology, and palaeontology | Discipline: Sedimentology
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Cited articles

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Berkson, J. M. and Clay, C.: Possible syneresis origin of valleys on the floor of Lake Superior, Nature, 245, 89–91, 1973.
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Berndt, C., Jacobs, C., Evans, A., Gay, A., Elliott, G., Long, D., and Hitchen, K.: Kilometre-scale polygonal seabed depressions in the Hatton Basin, NE Atlantic Ocean: Constraints on the origin of polygonal faulting, Mar. Geol., 332, 126–133, 2012.
Blouet, J.-P., Imbert, P., and Foubert, A.: Mechanisms of biogenic gas migration revealed by seep carbonate paragenesis, Panoche Hills, California, AAPG Bull., 101, 1309–1340, 2017.
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A newly discovered type of hydrocarbon leakage structure is investigated following the preliminary works of Ho (2013; et al. 2012, 2013, 2016): blade-shaped gas chimneys instead of classical cylindrical ones. These so-called Linear Chimneys are hydraulic fractures caused by overpressured hydrocarbon fluids breaching cover sediments along preferential directions. These directions are dictated by anisotropic stresses induced by faulting in sediments and pre-existing salt-diapiric structures.