Evolution history of transtensional pull-apart, oblique rift basin and its implication on hydrocarbon exploration: A case study from Sufyan Sub-basin, Muglad Basin, Sudan

Yassin, Mohamed A.; Hariri, Mustafa M.; Abdullatif, Osman; Korvin, Gábor

doi:10.1016/j.marpetgeo.2016.10.016

Cited by 26 publications

(9 citation statements)

References 24 publications

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“…The WCARS that extends from Mali (Gao trough) to Sudan developed in the earlier stages of the Gondwana break-up, i.e., in the Lower Cretaceous (Konaté et al, 2019). Basins in the WCARS are arranged in three main orientations, NE-SW (BenueTrough in Nigeria), ENE-WSW (Doba, Doseo, Salamat basins in eastern Chad and Baggara Basin in western Sudan), and NW-SE (Muglad Basin in Sudan, and the Ténéré rift system in Niger) (Genik, 1993;Yassin et al, 2017). During the Late Jurassic-Early Cretaceous (144.0-112.2 Ma) the central Atlantic opened between NW Africa and North America, which caused west movement for the African plate relative to the European plate.…”

Section: A) the Dasa Graben Structurementioning

confidence: 99%

Tectono-Sedimentary Evolution of the Uranium Deposits of the DASA Graben, Northern Niger

Sani¹,

Konaté²,

Wollenberg³

et al. 2021

GJSFR

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This study presents the structural evolution of the N70° trending Paleozoic-Mesozoic DASA graben, which is considered a sub-basin of the Tim Mersoï basin, and is located in northern Niger. The DASA graben is a uranium-rich trough discovered in recent exploration surveys. A tectono-sedimentary analysis of the DASA graben was implemented with a combined use of satellite imagery, field observations, borehole data analysis and available literature. This graben was affected from the Carboniferous to the Early Cretaceous by two major tectonic periods. The first period was an uplifting stage, which prevailed during the Carboniferous-Permian times and the second, ranging from the Triassic to the Early Cretaceous, corresponds to a rifting episode. The particularity of the DASA graben is that the sediments contain very high uranium grades. Lithological and tectonic factors controlled the emplacement of the uranium mineralization in the graben. The successive fracturing phases that affected the DASA graben were associated with a greater circulation of hydrothermal fluids and would have favoured higher grades of uranium mineralization.

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Section: A) the Dasa Graben Structurementioning

confidence: 99%

Tectono-Sedimentary Evolution of the Uranium Deposits of the DASA Graben, Northern Niger

Sani¹,

Konaté²,

Wollenberg³

et al. 2021

GJSFR

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“…In The structural evolution of the DASA graben during the Jurassic-Cretaceous period was compared to those of the West and Central African Rift Systems, commonly referred to as WCARS. During the lower Cretaceous, these rift systems were affected by extensive to transtensive tectonics regime [24,25], favoring a strong subsidence (54 m/Ma for the Termit Basin [26], 65 m/Ma for the Muglad Basin [27], 43 m/Ma for the Benue trough [28] and 13 m/Ma for the Téfidet trough [16]).…”

Section: Discussionmentioning

confidence: 99%

The DASA Graben in Northern Niger: A Case of a Paleo-Mesozoic Basin Evolving from Uplifting to Rifting

Abdoulwahid¹,

Konaté²,

Wollenberg³

2020

JGRE

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The N70° DASA graben is a closed-rift that seems to be the deepest part of the Tim Mersoï Basin, which is located in the northwestern part of Niger in West Africa. It contains more than 805 m of Paleozoic-Mesozoic sediments. The tectonic subsidence and uplifting was calculated by using well log data and deducing the variations in sedimentary thicknesses over time. Geological mapping and tectono-sedimentary analysis indicate that the structural evolution of the DASA trough is characterized by two major periods: (1) the first period was marked by an uplift stage ranging from the Carboniferous to the Permian. It was typified by a weak subsidence rate (3.45 m/Ma on average), under a transpressive tectonic regime, with a decrease in the thickness of the sedimentary series along the axial zone of the trough, and an increase of the thickness towards the border areas; (2) the second period was characterized by a higher subsidence rate (4.11 m/Ma on average) related to a change in the tectonic regime. It was marked by a rifting stage preserved over a long period, subjected to an extensive tectonic regime, from the Triassic to the lower Cretaceous, during which the highest thicknesses of the sedimentary series developed in the axial zone of the graben. The structural and sedimentological features defined the DASA graben as a particular type of syn-sedimentary basin evolving from a transpressive tectonic regime during the Paleozoic to an extensive tectonic regime during the Lower Mesozoic. Thus, the second period marked by an extensional regime would probably be related to the opening of the first stages of the Atlantic Ocean.

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“…Nevertheless, in some cases microseepage may still be present as a "halo" nearby produced oilfileds, such as those nearby Joknyang and Thar Jath in South Sudan and nearby Inhassoro/Temane in Mozambique. Figure 4 gives an overall picture of a wider geographic area: the Bouguer gravity map of the West and Central Africa Rift System [20] is superimposed to the licensing blocks of South Sudan, Lake Albert [7] and Lake Turkana [8] case studies. The location of microseepage signals, included in the sedimentary basins, clearly highlight the presence of (discovered) oilfields.…”

Section: Discussionmentioning

confidence: 99%

“…With respect to the geological setting, the study area is inside the Muglad Basin that extends for 120,000 km 2 from Sudan to South Sudan. The basin is composed by three rift cycles: Early Cretaceous (140-95 Ma), Late Cretaceous (95-65 Ma) and Paleogene (65-30Ma) and is well-known for its hydrocarbons accumulations [20]. The largest oilfields until now discovered are Heglig and Unity [17] (Figure 1a): the first is outside Block 5A and the second adjoins the block.…”

Section: South Sudan -Block 5amentioning

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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Evolution history of transtensional pull-apart, oblique rift basin and its implication on hydrocarbon exploration: A case study from Sufyan Sub-basin, Muglad Basin, Sudan

Cited by 26 publications

References 24 publications

Tectono-Sedimentary Evolution of the Uranium Deposits of the DASA Graben, Northern Niger

Tectono-Sedimentary Evolution of the Uranium Deposits of the DASA Graben, Northern Niger

The DASA Graben in Northern Niger: A Case of a Paleo-Mesozoic Basin Evolving from Uplifting to Rifting

Petroleum exploration in Africa from space

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