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首页> 外文期刊>Journal of Asian earth sciences >The temporal and spatial distribution of volcanism in the South China Sea region
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The temporal and spatial distribution of volcanism in the South China Sea region

机译：南海地区火山活动的时空分布

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摘要

Cenozoic magmatism in the South China Sea, the associated continental margins, coastal South China and Indochina is reviewed. Volcanism contemporaneous with rifting and sea floor spreading in the South China Sea was very weak in the margins and adjacent areas. There was only very limited magmatic activity, most probably after the cessation of sea floor spreading. The South China Sea has non-volcanic margins. Large basement relief caused by extension formed major basins and a continental-oceanic transitional zone in the northern margin reflects high crustal rigidity during rifting and drifting. The paucity of a magma supply and presence of rigid fault blocks are unfavorable to the mantle flow model previously proposed to account for the opening of the South China Sea, which was supposedly linked to the escape of Indochina induced by Indo-Eurasia collision.
机译：回顾了南海的新生代岩浆作用，相关的大陆边缘，华南沿海地区和印度支那。在南中国海，与裂谷和海床扩散同时发生的火山活动在边缘和邻近地区非常薄弱。岩浆活动非常有限，很可能是在海床扩展停止之后。南中国海有非火山边缘。由延伸形成的主要盆地和北缘的大陆-海洋过渡带引起的大型基底起伏反映了裂谷和漂移过程中的高地壳刚度。缺乏岩浆供应和刚性断层块的存在不利于先前提出的解释南中国海开放的地幔流模型，据推测这与印度洋-欧亚大陆碰撞引起的印度支那的逃逸有关。

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