Late Jurassic and Early Cretaceous sedimentation in the Mandawa Basin, coastal Tanzania

Fossum, Katrine; Dypvik, Henning; Haid, Muna Hassan Mohamoud; Hudson, W.; Brink, Majkel van den

doi:10.1016/j.jafrearsci.2020.104013

Cited by 15 publications

(4 citation statements)

References 38 publications

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“…Seafloor spreading is thought to have begun during the Jurassic Magnetic Quiet Zone (∼166 Ma) and ceased at ∼120 Ma [Davis et al, 2016, Segoufin andPatriat, 1980]. In Mozambique and Tanzania to the west, the breakup unconformity is of early Middle Jurassic (Aalenian) age [Fossum et al, 2021, Roche et al, 2021, Senkans et al, 2019. The age and the nature of the crust beneath the Comoro Islands and the Comoros Basin are still debated.…”

Section: Regional Geological History-inheritancementioning

confidence: 99%

Volcanism and tectonics unveiled in the Comoros Archipelago between Africa and Madagascar

Thinon¹,

Lemoine²,

Leroy³

et al. 2023

Comptes Rendus. Géoscience

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Section: Regional Geological History-inheritancementioning

confidence: 99%

Volcanism and tectonics unveiled in the Comoros Archipelago between Africa and Madagascar

Thinon¹,

Lemoine²,

Leroy³

et al. 2023

Comptes Rendus. Géoscience

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“…The geological evolution of the Mandawa basin has been studied by different researchers. [47][48][49] Karoo rifting, Gondwana breakup, East African rift system and opening of Somali basin are the main factors controlled the evolution of Mandawa basin. [50][51][52] The Mandawa Basin's depositional history was mainly influenced by the Gondwana breakup.…”

Section: Geological Settingmentioning

confidence: 99%

An Improved Computational Learning-Based Model for Estimating Total Organic Carbon in Unconventional Shale Reservoirs

Guo¹

2023

TPE

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Unconventional resources have emerged as one of the crucial alternatives to the rapidly depleting of conventional hydrocarbon resources. The hydrocarbon potential of shale source rocks is assessed by the percentage of the organic index such as total organic carbon (TOC). Correct estimation of TOC is very important since minor deviations in anticipated results can lead to wastage of investments and time. A slight improvement in estimation practices, on the other hand, can increase the value of an exploration project. Therefore, the objective of this study is to present an improved classification and regression tree (CART) computational learning-based model as an improved alternative in estimating TOC from well logging data. Conventional well logs suite of bulk density, gamma-ray, deep resistivity, sonic transit time, spontaneous potential, and neutron porosity from Mihambia, Mbuo and, Nondwa, Formations of the Mandawa Basin Tanzania, were used as input variables. Results from the developed CART TOC model were compared with the random forest (RF) and backpropagation neural network (BPNN). It was observed that the proposed CART model trained better while generalizing better through unused testing data compared with RF and BPNN. CART model achieved R, RMSE, and MAPE values of 0.9615, 0.0840, and 0.5035 for training and 0.9703, 0.1162, and 0.3722 for testing respectively. The proposed model work with higher accuracy with the sensitivity analysis indicating that gamma-ray, deep resistivity, and sonic transit time significantly influenced the model outcome.

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“…The base of the Kilwa Group is picked at c.8m in TDP-40, which corresponds to the Aptian -Middle Albian unconformity identified biostratigraphically by Mweneinda (2014) and Berrocoso et al (2015). The revised interpretation, based on the inorganic geochemical data, suggests that the MC Sequence rocks encountered in TDP-40, Taachui-1 and -1ST correspond to the underlying Mavuji Group (Hudson, 2010;Fossum et al, 2021;.…”

Section: Chemostratigraphy Lithostratigraphy and Biostratigraphymentioning

confidence: 99%

“…However, it is suggested here that the top is placed at the top of the NP21 calcareous nannofossil zone rather that the top of the NP23 zone. The revised interpretation, based on the inorganic geochemical data, would suggest that TDP-1 represents the earliest sediments of a new group of formations (the 'Songo Songo Group' of Hudson, 2010 andFossum et al, 2021) that continue through the remainder of the Oligocene Epoch and probably into the Neogene Period.…”

Section: Chemostratigraphy Lithostratigraphy and Biostratigraphymentioning

confidence: 99%

Chemostratigraphic and mineralogical examination of the Kilwa Group claystones, coastal Tanzania: An alternative approach to refine the lithostratigraphy

McCabe

Nicholas

Fitches³

et al. 2023

Journal of African Earth Sciences

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Late Jurassic and Early Cretaceous sedimentation in the Mandawa Basin, coastal Tanzania

Cited by 15 publications

References 38 publications

Volcanism and tectonics unveiled in the Comoros Archipelago between Africa and Madagascar

Volcanism and tectonics unveiled in the Comoros Archipelago between Africa and Madagascar

An Improved Computational Learning-Based Model for Estimating Total Organic Carbon in Unconventional Shale Reservoirs

Chemostratigraphic and mineralogical examination of the Kilwa Group claystones, coastal Tanzania: An alternative approach to refine the lithostratigraphy

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