The Tectonosphere and Formation of the Mozambique Ridge: Density and Physical Modeling

IF 0.9 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Russian Journal of Pacific Geology Pub Date : 2024-02-04 DOI:10.1134/s1819714023080195
D. A. Ryzhova, A. I. Tolstova, E. P. Dubinin, M. V. Kosnyreva, A. A. Bulychev, A. L. Groholsky
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Abstract

The tectonosphere and formation conditions of the Mozambique Ridge are considered. The Mozambique Ridge is located in the southwestern part of the Indian Ocean between the Natal and the Mozambique Mesozoic basins. The formation of the ridge is still debatable issue. The anomalous structure of the crust of the Mozambique Ridge can be explained either by underplating (thickening of the oceanic crust from below due to magmatism) or by stretching and thinning of the continental crust. Based on gravity and magnetic field anomalies, seismotomography and other geological and geophysical data, density modeling along four profiles was carried out. Physical modeling determined the formation conditions of the Mozambique Ridge, which was formed due to the splitting of the African–Antarctic continent, the presence of structural heterogeneities in the lithosphere of the African continent, and the influence of the Karoo plume.

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构造层和莫桑比克海脊的形成:密度和物理模型
摘要 研究了莫桑比克海脊的构造圈和形成条件。莫桑比克海脊位于印度洋西南部的纳塔尔和莫桑比克中生代盆地之间。关于该海脊的形成仍有争议。莫桑比克海脊地壳的异常结构可解释为地壳下沉(由于岩浆作用,大洋地壳自下而上变厚)或大陆地壳的拉伸和变薄。根据重力场和磁场异常、地震剖面图以及其他地质和地球物理数据,沿四个剖面进行了密度建模。物理模型确定了莫桑比克海脊的形成条件,该海脊的形成是由于非洲-南极大陆的分裂、非洲大陆岩石圈结构异质性的存在以及卡鲁羽流的影响。
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来源期刊
Russian Journal of Pacific Geology
Russian Journal of Pacific Geology 地学-地球科学综合
CiteScore
1.30
自引率
37.50%
发文量
34
审稿时长
>12 weeks
期刊介绍: Russian Journal of Pacific Geology publishes the results of research on the Earth crust and mantle composition and provides articles on the geological structure and patterns of distribution of mineral deposits in the Pacific Ocean, marginal seas and continental margins. It discusses the topics of stratigraphy, sedimentology, magmatic activity, and seismicity. The journal deals with the problems of lithosphere plates tectonics, and offers the results of neotectonic, geomorphological, geodesic, environmental and mining studies in the Pacific region. The journal accepts theoretical, methodical and philosophical articles covering general issues of geology, geophysics, geochemistry, geoecology and mining. The journal also publishes critical notes and comments, and reviews.
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