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南美洲大陆下古地幔热柱的地震显示及其对板块驱动力的意义 被引量:1

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摘要 对远程地震走时的研究揭示了南美巴西大陆之下地球深部上地幔古热柱的存在。尽管板块已移动了数千公里,但这些热柱的地理位置相对于覆盖其上的大陆仍保持固定不变。这表明位于南美洲之下的上地幔和岩石圈自冈瓦纳大陆分裂以来一直保持着耦合状态,这一事实为有关大陆板块长期驱动力的问题提供了一种可能的解答。
出处 《地质科学译丛》 1997年第3期60-64,共5页
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