Tectonics and Sedimentation of the South Atlantic Rift Sequence&lt;subtitle&gt;Cabinda, Angola&lt;/subtitle&gt;

Brice, Suzan E.; Cochran, Michael D.; Pardo, Georges; Edwards, Alan D.

doi:10.1306/m34430c1

Cited by 38 publications

(4 citation statements)

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“…It is one of a series of salt basins that developed along the west African passive margin associated with the breakup of Gondwana and opening of the Atlantic Ocean (Marton et al., 2000; Moulin et al., 2005; Nürnberg & Müller, 1991). Late Jurassic to Early Cretaceous rifting was followed by the formation of an Aptian sag basin within which approximately 1 km of evaporites accumulated (Loeme Formation; Anderson, Cartwright, Drysdall, & Vivian, 2000; Anka et al., 2009; Brice, Cochran, Pardo, & Edwards, 1982; Karner, Driscoll, McGinnis, Brumbaugh, & Cameron, 1997; Marton et al., 2000; Valle, Gjelberg, & Helland‐Hansen, 2001; Figure 2). Following deposition of the Loeme Formation, a shallow‐water carbonate‐dominated platform developed (Pinda Group) during the Albian (Anderson et al., 2000; Valle et al., 2001; Figure 2).…”

Section: Geological Settingmentioning

confidence: 99%

Spatial and temporal variations in minibasin geometry and evolution in salt tectonic provinces: Lower Congo Basin, offshore Angola

Gawthorpe

Zijerveld

et al. 2020

Basin Research

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In passive margin salt basins, the distinct kinematic domains of thin‐skinned extension, translation and contraction exert important controls on minibasin evolution. However, the relationship between various salt minibasin geometries and kinematic domain evolution is not clear. In this study, we use a semi‐regional 3D seismic reflection dataset from the Lower Congo Basin, offshore Angola, to investigate the evolution of a network of minibasins and intervening salt walls during thin‐skinned, gravity‐driven salt flow. Widespread thin‐skinned extension occurred during the Cenomanian to Coniacian, accommodated by numerous distributed normal faults that are typically 5–10 km long and spaced 1–4 km across strike within the supra‐salt cover. Subsequently, during the Santonian–Paleocene, multiple, 10–25 km long, 5–7 km wide depocentres progressively grew and linked along strike to form elongate minibasins separated by salt walls of comparable lengths. Simultaneous with the development of the minibasins, thin‐skinned contractional deformation occurred in the southwestern downslope part of the study area, forming folds and thrusts that are up to 20 km long and have a wavelength of 2–4 km. The elongate minibasins evolved into turtle structures during the Eocene to Oligocene. From the Miocene onwards, contraction of the supra‐salt cover caused squeezing and uplift of the salt walls, further confining the minibasin depocentres. We find kinematic domains of extension, translation and contraction control the minibasin initiation and subsequent evolution. However, we also observe variations in minibasin geometries associated with along‐strike growth and linkage of depocentres. Neighbouring minibasins may have different subsidence rates and maturity leading to marked variations in their geometry. Additionally, migration of the contractional domain upslope and multiple phases of thin‐skinned salt tectonics further complicates the spatial variations in minibasin geometry and evolution. This study suggests that minibasin growth is more variable and complex than existing domain‐controlled models would suggest.

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Section: Geological Settingmentioning

confidence: 99%

Spatial and temporal variations in minibasin geometry and evolution in salt tectonic provinces: Lower Congo Basin, offshore Angola

Gawthorpe

Zijerveld

et al. 2020

Basin Research

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“…The formation of the Inner and Outer Kwanza basins, offshore Angola initiated in the Early Cretaceous when rift pulses between the African and South American plates, and ultimately the breakup of Gondwana, resulted in the opening of the South Atlantic Ocean (Brice et al., 1982; Hudec & Jackson, 2004; Jackson et al., 2005; Serié et al., 2017; Figure 1).…”

Section: Geological Settingmentioning

confidence: 99%

Mechanical Stratigraphy Controls Normal Fault Growth and Dimensions, Outer Kwanza Basin, Offshore Angola

Redpath¹,

Jackson²,

Bell³

2022

Tectonics

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“…The Lower Congo Basin was formed by the Gondwana breakup and rifting of the South Atlantic Ocean during the Late Jurassic-Early Cretaceous (Brice et al, 1982;Uchupi, 1992;Valle et al, 2001). Rift-controlled lacustrine basins preceded restricted marine conditions in the Aptian (125-113 Ma) that allowed the deposition of a thick (>1 km) salt layer followed by deposition of predominantly carbonates during the Albian, marls and clays from the Albian to Late Cretaceous and predominantly siliciclastic from the Late Cretaceous to Eocene (Brice et al, 1982;Karner et al, 1997;Marton et al, 2000;Schollnberger, 2001). The Aptian Salt subsequently facilitated the gravity sliding of the post-salt succession, with the gravity sliding exerting a first-order control on the geometry of the post-rift succession (Fort et al, 2004;Karner et al, 1997;Vallet et al, 2001).…”

Section: Geological Backgroundmentioning

confidence: 99%

Middle to late Pleistocene palaeoceanography inferred from ridge-furrow structures on the continental slope offshore Angola

et al. 2021

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Tectonics and Sedimentation of the South Atlantic Rift Sequence<subtitle>Cabinda, Angola</subtitle>

Cited by 38 publications

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Spatial and temporal variations in minibasin geometry and evolution in salt tectonic provinces: Lower Congo Basin, offshore Angola

Spatial and temporal variations in minibasin geometry and evolution in salt tectonic provinces: Lower Congo Basin, offshore Angola

Mechanical Stratigraphy Controls Normal Fault Growth and Dimensions, Outer Kwanza Basin, Offshore Angola

Middle to late Pleistocene palaeoceanography inferred from ridge-furrow structures on the continental slope offshore Angola

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