The Davie Fracture Zone and adjacent basins in the offshore Mozambique Margin – A new insights for the hydrocarbon potential

Mahanjane, Estevão Stefane

doi:10.1016/j.marpetgeo.2014.06.015

Cited by 66 publications

(60 citation statements)

References 17 publications

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“…For the seismostratigraphic interpretation of the areas in the Morondava Basin and the Davie Ridge, we use the stratigraphic interpretation established in Franke et al (2015) and . For the Mozambique Basin, we use results from previous offshore studies (e.g., Castelino et al, 2015;Franke et al, 2015;Mahanjane, 2014).…”

Section: Methodsmentioning

confidence: 99%

“…1). This dataset is part of the National Petroleum Institute of Mozambique archive and has recently been presented by Mahanjane (2014). Here, we present one previously published profile (Mahanjane, 2014) with a focus on the continental slope and additionally show one previously unpublished profile of this dataset.…”

Section: Methodsmentioning

confidence: 99%

“…1) remains poorly studied. Existing studies focus mostly on the sedimentary infill of the Mozambique Basin (e.g., Castelino et al, 2015;Mahanjane, 2014;Salman and Abdula, 1995) or the crustal structure in the western and central parts of the Mozambique Basin (e.g., Leinweber et al, 2013;Mahanjane, 2012;Müller and Jokat, 2017;Mueller et al, 2016). While it is generally accepted that the RiiserLarsen Sea is the conjugate of the Mozambique Basin (e.g., Jokat et al, 2003;Nguyen et al, 2016), it remains much less well studied in spite of an available set of modern geophysical data (e.g., Hinz et al, 2004;Leitchenkov et al, 2008;Roeser et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…1). In the lower panels, the stratigraphic interpretation according to Castelino et al (2015), Leitchenkov et al (2008) and Mahanjane (2014) is presented. At the foot of the continental slope, at the continent-ocean transition, a 20-30 km wide zone of deformed and fractured basement, is distinct.…”

Section: Introductionmentioning

confidence: 99%

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Tie points for Gondwana reconstructions from a structural interpretation of the Mozambique Basin, East Africa and the Riiser-Larsen Sea, Antarctica

Klimke

Franke

Mahanjane³

et al. 2018

Solid Earth

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Abstract. Movements within early East Gondwana dispersal are poorly constrained, and there is debate about conjugate geologic structures and the timing and directions of the rifting and earliest seafloor spreading phases. We present a combined structural interpretation of multichannel reflection seismic profiles from offshore of northern Mozambique (East Africa) and the conjugate Riiser-Larsen Sea (Antarctica). We find similar structural styles at the margins of both basins. At certain positions at the foot of the continental slope close to the continent-ocean transition, the basement is intensely deformed and fractured, a structural style very untypical for rifted continental margins. Sediments overlying the fractured basement are deformed and reveal toplap and onlap geometries, indicating a post-breakup deformation phase. We propose this unique deformation zone as a tie point for Gondwana reconstructions. Accordingly, we interpret the western flank of Gunnerus Ridge, Antarctica as a transform margin similar to the Davie Ridge offshore of Madagascar, implying that they are conjugate features. As the continental slope deformation is post-rift, we propose a two-phase opening scenario. A first phase of rifting and early seafloor spreading, likely in NW-SE direction, was subsequently replaced by a N-S-directed transform deformation phase overprinting the continent-ocean transition. From previously identified magnetic chrons and the sediment stratigraphy, this change in the spreading directions from NW-SE to N-S is suggested to have occurred by the late Middle Jurassic. We suggest that the second phase of deformation corresponds to the strikeslip movement of Madagascar and Antarctica and discuss implications for Gondwana breakup.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tie points for Gondwana reconstructions from a structural interpretation of the Mozambique Basin, East Africa and the Riiser-Larsen Sea, Antarctica

Klimke

Franke

Mahanjane³

et al. 2018

Solid Earth

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“…Petroleum exploration in this area started in 1904: four onshore fields were discovered to date (i.e. Pande, Temane, Inhassoro and Buzi) [19] and there are still great potentialities, as confirmed by the recent offshore discoveries [29].…”

Section: Mozambique -Blocks Pt5-b and Pt5-cmentioning

confidence: 99%

Petroleum exploration in Africa from space

Gianinetto

Frassy

Aiello

et al. 2017

Earth Resources and Environmental Remote Sensing/Gis Applications VIII

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Hydrocarbons are nonrenewable resources but today they are the cheaper and easier energy we have access and will remain the main source of energy for this century. Nevertheless, their exploration is extremely high-risk, very expensive and time consuming. In this context, satellite technologies for Earth observation can play a fundamental role by making hydrocarbon exploration more efficient, economical and much more eco-friendly. Complementary to traditional geophysical methods such as gravity and magnetic (gravmag) surveys, satellite remote sensing can be used to detect onshore long-term biochemical and geochemical alterations on the environment produced by invisible small fluxes of light hydrocarbons migrating from the underground deposits to the surface, known as microseepage effect. This paper describes two case studies: one in South Sudan and another in Mozambique. Results show how remote sensing is a powerful technology for detecting active petroleum systems, thus supporting hydrocarbon exploration in remote or hardly accessible areas and without the need of any exploration license.

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The offshore East African Rift System: Structural framework at the toe of a juvenile rift

et al. 2015

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The Cenozoic East African Rift System (EARS) extends from the Red Sea to Mozambique. Here we use seismic reflection and bathymetric data to investigate the tectonic evolution of the offshore branch of the EARS. The data indicate multiple and time transgressive neotectonic deformations along~800 km of the continental margin of northern Mozambique. We observe a transition from a mature rift basin in the north to a juvenile fault zone in the south. The respective timing of deformation is derived from detailed seismic stratigraphy. In the north, a~30 km wide and more than 150 km long, N-S striking symmetric graben initiated as half-graben in the late Miocene. Extension accelerated in the Pliocene, causing a continuous conjugate border fault and symmetric rift graben. Coevally, the rift started to propagate southward, which resulted in a present-day~30 km wide half-graben, approximately 200 km farther south. Since the Pleistocene, the rift has continued to propagate another~300 km, where the incipient rift is reflected by subrecent small-scale normal faulting. Estimates of the overall brittle extension of the matured rift range between 5 and 12 km, with an along-strike southward decrease of the extension rate. The offshore portion of the EARS evolves magma poor, similar to the onshore western branch. The structural evolution of the offshore EARS is suggested to be related to and controlled by differing inherited lithospheric fabrics. Preexisting fabrics may not only guide and focus extension but also control rift architecture.

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The Davie Fracture Zone and adjacent basins in the offshore Mozambique Margin – A new insights for the hydrocarbon potential

Cited by 66 publications

References 17 publications

Tie points for Gondwana reconstructions from a structural interpretation of the Mozambique Basin, East Africa and the Riiser-Larsen Sea, Antarctica

Tie points for Gondwana reconstructions from a structural interpretation of the Mozambique Basin, East Africa and the Riiser-Larsen Sea, Antarctica

Petroleum exploration in Africa from space

The offshore East African Rift System: Structural framework at the toe of a juvenile rift

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