近年来,对雅鲁藏布蛇绿岩带的研究引起了国内外学者的广泛兴趣,因为它不仅对了解中生代以来特提斯海的演变,而且对阐明青藏高原地质发展历史都是十分重要的。 虽然,这条带内大规模超基性岩体的分布早已被发现,有些岩体已作过很好的研究。但是,整个蛇绿岩组合的综合性研究还刚开始。最近一些作者根据野外路线调查,对这条蛇绿岩带作了初步的论述。但由于缺乏对蛇绿岩比较系统的填图工作,关于它的分布、组成、层序、形成、侵位及其演化历史还有许多重要情况不十分清楚。为此,我们选择了该带中蛇绿岩出露良好的地区,即日喀则地区白朗—吉定之间,在东西长90公 In recent years, the study of the Yarlung Zangbo ophiolite zone has attracted a great deal of interest both at home and abroad because it is not only important for understanding the evolution of the Tethys Sea since the Mesozoic, but also for clarifying the geological history of the Tibetan Plateau . Although the distribution of large-scale ultrabasic rocks within this zone has long been discovered, some rock bodies have been well studied. However, a comprehensive study of the entire ophiolite assemblage has just begun. Recently, some authors based on the field route survey made a preliminary discussion of this ophiolite zone. However, due to the lack of systematic mapping of ophiolites, there are still many important facts about its distribution, composition, sequence, formation, emplacement and its evolutionary history. For this reason, we have chosen the area where the ophiolite is well exposed, namely, Bailong-Jidi in Shigatse region, with a length of 90 km