Thickness of sediments in the Congo basin based on the analysis of decompensative gravity anomalies

Kaban, Mikhail K.; Delvaux, Damien; Maddaloni, Francesca; Tesauro, Magdala; Braitenberg, Carla; Petrunin, Alexey G.; Khrepy, Sami El

doi:10.1016/j.jafrearsci.2021.104201

Cited by 6 publications

(25 citation statements)

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“…The present study provides for the first time a consistent map for the whole Arctic zone of northeastern Asia based on unified standards of interpretation. It confirms that this method can be used for investigations of hardly accessible areas as it was previously done for Antarctica (Haeger and Kaban, 2019) and for the Congo basin (Kaban et al, 2021a). Finally, the obtained results can be used for the future planning of detailed studies of local structures within the study region, which have potential for mineral prospecting and exploitation and for the infrastructure development important for the Arctic zone.…”

Section: Discussionsupporting

confidence: 76%

“…For the Arctic Ocean, the Crust1.0 model is employed (Laske and Masters, 2013). It has been demonstrated that plausible changes of the Moho model don't affect the result significantly (Kaban et al, 2021a).…”

Section: Initial Datamentioning

confidence: 99%

“…Cordell et al, 1991). For wide basins (≈300-400 km and more) this reduction may even exceed one order of magnitude (Kaban et al, 2021a). Zorin et al (1985) and Cordell et al (1991) https://doi.org/10.5194/se-2021-90 Preprint.…”

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confidence: 99%

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Sedimentary basins of the Eastern Asia Arctic zone: new details on their structure revealed by decompensative gravity anomalies

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Kaban

Soloviev

et al. 2021

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Abstract. In the present study, structure of sedimentary basins in the Eastern Asia Arctic zone is analysed by employing the approach based on decompensative gravity anomalies. Two obtained models, differing in their initial conditions, provide thickness and density of sediments in the study area. They demonstrate essentially new details on the structure, shape and density of the sedimentary basins. Significant changes in the sedimentary thickness and the depocenter location have been found for the Anadyr basin in its continental part. Also, new details on the sedimentary thickness distribution have been revealed for the central part of the Penzhin and Pustorets basins, for the latter, the new location of the depocenter has been identified. The new model agrees well with the seismic data on the sedimentary thickness for the offshore part of the Chauna basin confirming that the method is robust. The most significant lateral redistribution of the thickness has been found for the Lower Cretaceous coal-bearing strata in the northern part of the Zyryanka basin, where the connection of two coal-bearing zones, that was not previously mapped, has been identified. Also, the new details on the sedimentary thickness distribution have been discovered for the Primorsk basin. Therefore, the new results substantially improve our knowledge about the region, since previous geological and geophysical studies were unsystematic, sparse and limited in depth. Thus, the implementation of the decompensative gravity anomalies approach provides a better understanding of the evolution of the sedimentary basins and the obtained results can be used for planning of future detailed studies in the area.

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Section: Discussionsupporting

confidence: 76%

Section: Initial Datamentioning

confidence: 99%

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Sedimentary basins of the Eastern Asia Arctic zone: new details on their structure revealed by decompensative gravity anomalies

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Kaban

Soloviev

et al. 2021

Preprint

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“…Unfortunately, the decompensative correction increases to infinity with increasing of the wavelength. Following Cordell et al (1991) we reduce it after a predefined wavelength (λ 0 =1500 km) (Kaban et al, 2017(Kaban et al, , 2021a. This restriction doesn't bias the result because it is assumed that wide basins are already included in the initial model.…”

Section: Methodsmentioning

confidence: 99%

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2021

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“…4b) is taken for the continental part and shelf from (Tesauro et al, 2012). Contrary to the Moho, this parameter might significantly influence the final estimations (Kaban et al, 2021a). Tesauro et al (2012) have globally compared EET obtained with independent methods (geomechanical modeling and crossspectral analysis of the gravity field and topography).…”

Section: Initial Datamentioning

confidence: 99%

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2021

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Thickness of sediments in the Congo basin based on the analysis of decompensative gravity anomalies

Cited by 6 publications

References 48 publications

Sedimentary basins of the Eastern Asia Arctic zone: new details on their structure revealed by decompensative gravity anomalies

Sedimentary basins of the Eastern Asia Arctic zone: new details on their structure revealed by decompensative gravity anomalies

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