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俄媒:专家预测欧亚大陆2000万年后可能分裂
2017-09-25 14:57:52 中国青年网
新华社北京9月25日新媒体专电;俄媒称,据俄罗斯科学院西伯利亚分院出版的学术期刊《西伯利亚科学》称,西伯利亚科学家预测,2000万年后地球上最大的大陆——欧亚大陆将会沿贝加尔湖分裂为两部分,而目前贝加尔湖所在地将会出现新的大洋。
据俄罗斯卫星通讯社9月21日报道,该刊称,俄罗斯科学院西伯利亚分院地质矿物研究所和新西伯利亚大学的科学家在还原贝加尔湖的历史,以及汇总其他学者的研究成果。他们预测贝加尔湖未来可能的样子时,做出了欧亚大陆沿贝加尔湖分裂的结论。研究结果发表在国际知名地学期刊《冈瓦纳研究》上。
报道称:“在地壳上,就在欧亚大陆的中间,有一个巨大的裂谷——贝加尔裂谷带。它正在逐步变宽,如果不改变地球动力学状况,2000万年后最大的大陆将再次分裂为两部分,而在贝加尔湖地区将出现新的大洋。”
科学家还原的地图显示,出现贝加尔裂谷前,中生代的一个时期内(约7000万到1亿年以前)在这个位置上有断裂构造型式。贝加尔是分裂的最古老以及中心地区。数千万年来贝加尔裂谷带发展非常平静,但约在500万至700万年前突然发生变化,构造运动的速度大幅提升,这里开始形成山脉。
文章指出,贝加尔湖周边的山脉高度持续增加,平均每年上升5至6毫米,这个隆起速度非常快。
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