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“小杰⋯受不了⋯进来”-译文小记

6500万年前小杰⋯受不了⋯进来印度板块和欧亚板块为何突然加速汇聚?最新研究揭秘

来源: 金联创能源
2024-11-08 01:49:50

最佳回答

“小杰⋯受不了⋯进来”6500万年前小杰⋯受不了⋯进来印度板块和欧亚板块为何突然加速汇聚?最新研究揭秘

  中新小杰⋯受不了⋯进来网北京11月7日电 (记小杰⋯受不了⋯进来者 孙自法)在约6500万年前,地球上的印度板块和欧亚板块突然加速汇聚?国际著名学术期刊《自然》北京时间11月7日凌晨在线发表一篇地球科学论文认为,这可能是得益于小杰⋯受不了⋯进来沉积物的帮助。

  该论文介绍,约6500万年前印度板块和欧亚板块汇聚速度增加,从每年8厘米增加到峰值约每年18厘米,是显生宙(约5.41亿年前至今)以来记录最多的板块重组事件之一。不过,印度板块和欧亚板块在此期间的运动机制尚不明确,也备受学界关注。

  在本项研究中,论文通讯作者、南方科技大学地球与空间科学系副教授胡佳顺和同事联合北京大学、南京大学及新加坡南洋理工大学的合作伙伴,将西藏南部冈底斯岩浆弧火成岩的地球化学数据与数值建模相结合进行研究分析,他们研究认为,印度被动大陆边缘(大陆裂解时在大陆边缘形成)的大规模侵蚀产生了大量沉积物,这些沉积物一旦俯冲至欧亚大陆下方,可能会润滑板块交界,促使印度板块和欧亚板块加速汇聚。

  论文作者总结表示,这项研究发现对板块构造的驱动力提出了新的见解,表明在大陆碰撞时,此类俯冲速度的加快,可能是板块聚合最后阶段的一个常见特征。(完)

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