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Kinematic modelling of thermal history of the Mozambique rifted margin
Marine and Petroleum Geology ( IF 4.2 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.marpetgeo.2020.104712
N. Etheve , L. Jeanniot , T. Cornu , J.P. Callot

Abstract The thermal evolution and crustal nature along the Mozambique rifted margin is investigated using a forward kinematic modelling approach. The numerous plate reconstructions for the breakup of East Gondwana question the crustal nature of the Mozambique margin, especially in the vicinity of the Beira High and the Zambezi depression. Given the few geological and geophysical data available, it is necessary to propose simple but relevant hypotheses to calibrate the margin structure and evolution. Different scenarios were tested to examine the nature of the crust in the Beira High and the Zambezi depression (i.e. continental, oceanic, and mixed). As the margin thermal evolution is related to the crustal architecture and nature, we compared thermal modeling results to well data. Based on these observations, we favour a continental nature for the Beira High and the Zambezi depression. Given the widespread magmatism in the area and the possible variation of volcanic addition along-strike, we consider the presence of underplating in the Zambezi depression.

中文翻译:

莫桑比克裂谷边缘热历史的运动学模拟

摘要 使用正向运动学建模方法研究了莫桑比克裂谷边缘的热演化和地壳性质。为东冈瓦纳断裂而进行的大量板块重建对莫桑比克边缘的地壳性质提出了质疑,尤其是在贝拉高地和赞比西洼地附近。鉴于可用的地质和地球物理数据很少,有必要提出简单但相关的假设来校准边缘结构和演化。测试了不同的情景以检查贝拉高地和赞比西洼地(即大陆、海洋和混合)地壳的性质。由于边缘热演化与地壳结构和性质有关,我们将热建模结果与井数据进行了比较。基于这些观察,我们喜欢贝拉高地和赞比西河洼地的大陆性质。鉴于该地区广泛的岩浆活动和火山沿走向可能发生的变化,我们认为赞比西洼地存在底床。
更新日期:2021-01-01
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