一九八○年笔者参加了地质矿产部青藏高原地质调查大队第一分队工作,沿青藏公路在格尔木至不冻泉一线开展地质调查,取得了一些成果。本文是在野外成果初步整理的基础上,对东西大滩花岗岩带的基本特征作一概略描述,并尝试探讨岩带的成因机制及与大 In 1980, I participated in the first detachment of the Qinghai-Tibet Plateau Geological Survey Brigade in the Ministry of Geology and Mines and conducted geological surveys along the Qinghai-Tibet Highway from Golmud to the Frost Spring. Some achievements have been made. This article is based on the preliminary results of the field work, a brief description of the basic characteristics of the East and West Granite Band, and try to explore the cause of rock belt and large