Crustal structure beneath the Mount Cameroon region derived from recent gravity measurements
| Autor: | Willy Lemotio, Severin Nguiya, Évariste Ngatchou Heutchi, Alain Pierre Tokam, Marcelin Mouzong Pemi |
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| Rok vydání: | 2019 |
| Předmět: |
Global and Planetary Change
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Induced seismicity 010502 geochemistry & geophysics 01 natural sciences Mantle (geology) Mount Tectonics Paleontology Intrusion Volcano Lateral extension General Earth and Planetary Sciences Bouguer anomaly Geology 0105 earth and related environmental sciences |
| Zdroj: | Comptes Rendus Geoscience. 351:430-440 |
| ISSN: | 1631-0713 |
| Popis: | In this study, the recent update of the gravity database with new measurements has raised the opportunity of improving the knowledge of the crustal structure beneath the large volcanic system called Mount Cameroon, and its implication in the regional tectonics. The multi-scale wavelet analysis method was applied to highlight the geologic features of the area, and their depths were estimated using the logarithmic power spectrum method. The results reveal a complex crustal structure beneath Mount Cameroon with high variation in the lateral distribution of crustal densities. The upper and lower crusts are intruded by dense materials originating from the mantle with less lateral extension. The trends of Tiko and Ekona faults along the intrusion suggest tectonic activities as deep as 25 km. The difference in mantle composition or temperature between the East and the West of the studied area is clearly seen in detailed wavelet images and agrees with a mantle origin for the Cameroon Volcanic Line. |
| Databáze: | OpenAIRE |
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