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西藏最南边的部分是属于印度大陆板块,而拉萨地块自白垩纪以前就属于欧亚板块,两者之间的缝合带是1981—1982年中法两国联合考察项目深部构造地震探测的主要目的。第一阶段的探测结果,已在相应的论文中报导。1982年6月的第二阶段主要设想在拉萨地块上,紧靠雅鲁藏布江缝合线的北面,布置一条平行于缝合线的大剖面,进行地震探测工作,以便与缝合线以南1981年大剖面的地震探测出的构造成果进行比较。但是由于交通及气候的限制,没有能按原设想位置布置成新的大剖
The southernmost part of Tibet belongs to the Indian Plate, whereas the Lhasa block belongs to the Eurasian Plate since the Cretaceous. The suture between the two is the main part of the seismic exploration of the deep tectonics of the Sino-French joint project in 1981-1982 purpose. The first phase of the detection results, has been reported in the corresponding paper. The second phase of June 1982 mainly envisaged the seismic exploration of a large section parallel to the suture in the Lhasa block immediately north of the Yarlung Zangbo suture so as to be in line with the 1981 large-scale Earthquake detected the results of the construction to compare. However, due to traffic and climate constraints, it is not possible to arrange the new profile as originally planned