论文部分内容阅读
青藏高原是印度洋板块和欧亚板块的汇聚区域,是陆壳碰撞的典型地区。地质构造十分复杂,成为解决大陆地球动力学等重要理论问题的关键地区。在1980年国际青藏高原科学讨论会上,关于青藏高原板块运动的讨论大致分为三部份:一、关于板块边界划分的论点以古生物为依据,喜马拉雅地区发现分布广泛的反映冷温环境的动植物化石和含有冰碛落石的石炭—下二叠统冰海相沉积。它们大致可以和印度次大陆同时代的冈瓦纳型沉积对比。因此认为喜马拉雅山是印度板块的一部份,其北缘的雅鲁藏布江为两大板块的边界。
The Qinghai-Tibet Plateau is a converging area between the Indian Ocean plate and the Eurasian plate, and is a typical area where the continental crust collides. The geological structure is very complicated and has become a key area for solving important theoretical problems such as the Earth’s geodynamics in the continent. At the International Symposium on Tibetan Plateau in 1980, the discussion on plate movement in the Qinghai-Tibet Plateau can be divided into three parts: I. Arguments on the division of plate boundaries On the basis of paleontology, the widespread distribution of plants and animals in the Himalayas that reflect cold-temperature environment Fossils and Carboniferous-Lower Permian ice-sea sediments that contain icy moraines. They can roughly be compared with contemporary Gondwana-type sediments in the Indian subcontinent. Therefore, the Himalayas are considered as part of the Indian plate. The Brahmaputra River on the northern margin of the Himalayas is the boundary between the two major plates.