| Autor: |
Bouba Saidou, Apollinaire Bouba, Valentin Oyoa, Loudi Yap, Joseph Kamguia, Eliezer Manguelle-Dicoum |
| Rok vydání: |
2022 |
| DOI: |
10.21203/rs.3.rs-1664918/v1 |
| Popis: |
In this work, the crustal structure study of Babouri-Figuil and Mayo Oulo-Léré sedimentary basins was carried out through the interpretation of gravity data. These data were obtained by combining to the terrestrial gravity data those obtained from EGM2008 model. The Analysis of the terrestrial Bouguer anomaly maps revealed negative and positive anomalies. Negative anomalies would be the signature of sedimentary basins while positive anomalies would be attributed to basaltic rocks under granitic environment. To isolate anomalies due to deep structures from those due to near surface structures, we used the empirical method. This method testifies that the residual map of order 4 is an appropriate one. In order to conduct the quantitative interpretation of the combined gravity data, six profiles were drawn on the residual Bouguer anomaly map and therefore were interpreted using spectral analysis and 2.5D modeling methods. The results indicate that the mean depths of mass sources near surface of Babouri-Figuil and Mayo Oulo-Léré sedimentary basins were 1.50km and 1.55km respectively. Moreover, Babouri-Figuil is constituted of two formations of different density contrast while Mayo Oulo-Léré shows three formations. These models helped us to clarify the geological structure of the study area. The results of the present study allow greater understanding the sedimentary basin thickness. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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