马达加斯加海台地质属性及其构造-岩浆演化过程

许延成; 唐勇; 郭楚枫; 董崇志; 王征; 吴招才; 任建业

doi:10.3799/dqkx.2025.064

Volume 50 Issue 8

Aug. 2025

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Article Navigation > Earth Science > 2025 > 50(8): 3070-3084

Xu Yancheng, Tang Yong, Guo Chufeng, Dong Chongzhi, Wang Zheng, Wu Zhaocai, Ren Jianye, 2025. Analysis of the Geological Characteristics and Tectono-Magmatic Evolution Processes of the Madagascar Plateau. Earth Science, 50(8): 3070-3084. doi: 10.3799/dqkx.2025.064

Citation:

Xu Yancheng, Tang Yong, Guo Chufeng, Dong Chongzhi, Wang Zheng, Wu Zhaocai, Ren Jianye, 2025. Analysis of the Geological Characteristics and Tectono-Magmatic Evolution Processes of the Madagascar Plateau. Earth Science, 50(8): 3070-3084. doi: 10.3799/dqkx.2025.064

Citation:

Xu Yancheng, Tang Yong, Guo Chufeng, Dong Chongzhi, Wang Zheng, Wu Zhaocai, Ren Jianye, 2025. Analysis of the Geological Characteristics and Tectono-Magmatic Evolution Processes of the Madagascar Plateau. Earth Science, 50(8): 3070-3084. doi: 10.3799/dqkx.2025.064

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Analysis of the Geological Characteristics and Tectono-Magmatic Evolution Processes of the Madagascar Plateau

doi: 10.3799/dqkx.2025.064

Xu Yancheng^{1
,
,},
Tang Yong^{2, 3, 4
,
,
,},
Guo Chufeng^{2, 3},
Dong Chongzhi²,
Wang Zheng²,
Wu Zhaocai²,
Ren Jianye¹

1.
College of Marine Science and Technology, China University of Geosciences, Wuhan 430074, China
2.
Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
3.
School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
4.
Ocean College, Zhejiang University, Zhoushan 316021, China

Received Date: 2025-04-11
Publish Date: 2025-08-25

Abstract

Abstract

The Madagascar Plateau (MADP), as a product of the separation of the Gondwana continent, exhibits unique topographic and geophysical characteristics. Through the interpretation and analysis of deep reflection seismic section A-A' across the MADP region, combined with gravity and magnetic anomaly data, the geological properties, crustal structure and sedimentary stratigraphic framework of the MADP are deeply studied, and the tectonic evolution process of lithosphere extension and rupture in the southern continental margin of Madagascar is clarified.Based on gravity and seismic data analysis, the MADP can be subdivided into the thinned continental crust in the north, the oceanic-continental transition zone (OCT) in the mid, and the thickened oceanic crust in the south. After undergoing rifting at 133 Ma, the southern continental margin of Madagascar experienced extension and rupture at 120 Ma, leading to the formation of a magmatic passive continental margin. Subsequently, influenced by the Marion hotspot (90–50 Ma), the continental and oceanic crust underwent further thickening due to magmatic activity, ultimately resulting in the present-day Madagascar Passive Margin (MADP). This research enhances our understanding of the development and evolution of MADP and has significant practical implications for determining seafloor high terrain attributes in the southwest Indian Ocean.
- Madagascar Plateau,
- submarine elevation,
- mid-ocean ridge,
- Proto-oceanic crust,
- Marion hotspot,
- marine geology

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References(41)

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