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Solofo A Rakotondraompiana Yves Albouy Alain Piqu 《Journal of African Earth Sciences》1999,28(4):961-973
A survey of the transfer function between the relief and anomalies of Bouguer and a direct modelling of six gravimetric profiles permits the deduction of the isostatic compensation mechanism for the island of Madagascar and a model of the lithosphere. These results are compared to the other geophysical and geological data. 相似文献
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Alain Piqu Edgard Laville Pierre Chotin Jean Chorowicz Solofo Rakotondraompiana Catherine Thouin 《Journal of African Earth Sciences》1999,28(4):975-983
Field studies and observations from aerial photographs, remote sensing and numerical field models show that the Meso-Cenozoic and Recent sedimentary sequences of Madagascar are affected by normal faults. These faults, north-south, north-northeast-south-southwest and north-northwest-south-southwest trending, are responsible for the following morphological effects: scarps, block tilting and opening of faulted basins, the most important of which being the Lake Alaotra Basin. The general orientation of these brittle structures and some observations in the field show tha the horizontal maximum extension isroughly east-west directed. Other lines of evidence, seismic and gravimetric, confirm that Madagascar is presently submitted to a crustal and lithospheric extension, parallel to that in East Africa and the Mozambique Channel. 相似文献
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