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1983年6—7月,我们在青海省玉树地区进行地质考察时,在直门达西通天河边的尕拉发现了一个较好的蛇绿岩套剖面。蛇绿岩套虽已被强烈肢解、破碎、片理化,但其各组成部分基本具备,在通天河构造带上可作为一个代表性剖面。通天河—金沙江作为一个构造带在国内已得到了普遍承认和应用,近年来研究板块构造的学者甚至把它作为分隔南、北两大古陆的界线——板块缝合线;然而在这条带上除了张之孟等曾报导过得荣附近的蛇绿岩套外,特别在西部通天河一带至今还无正式的蛇绿岩套报导。因此,尕拉蛇绿岩套剖面的新发现,对通天河—金沙江带的蛇绿岩套特征、古特提斯海的演化历史、青藏高原的地质结构及形成模式的研究提供了新资料。
From June to July 1983, when we conducted a geological survey in the Yushu area of Qinghai Province, we found a better profile of ophiolite suite at Gara between Dazidong and Tianhe. Although ophiolite suite has been strongly dismembered, broken, piece physics and chemistry, but its basic components have, in the Tongtianhe tectonic belt can be used as a representative section. As a tectonic belt, the Tongtianhe-Jinshajiang River has been universally recognized and applied in China. In recent years, scholars who studied the plate tectonics have even used it as the boundary line between the two ancient North and South continents - plate suture. However, in this article In addition to Zhang Meng has brought coverage of the ophiolite near Derong, especially in the western part of the Tongtianhe so far there is no official report of ophiolite sets. Therefore, the new discovery of the green-cover section of the Garla ophiolite provides new information on the characteristics of the ophiolite suite in the Tongtianhe-Jinshajiang belt, the evolution history of the Goutitis Sea, and the geological structure and formation pattern of the Qinghai-Tibet Plateau .