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一、红区基性超基性岩体的地质概况 (一)地层红区基性超基性岩体(简称岩体,下同)位于藏南雅鲁藏布江流域蛇绿岩带的东段,处于西藏板块(欧亚板块)与印度板块之间的缝合线上。其南侧是以中生代海相沉积为主的喜马拉雅优地槽褶皱带。为一套巨厚的复理石建造。区内中、新生代沉积由三叠系、白垩系及第三系组成(图1)。三叠系:以上三叠统诺利克阶(T_3~2)为代表,广泛分布于岩体以南广大地区。其主要
Geological Survey of the Basic Ultramafic Rock Mass in the Red Zone (a) The stratum red basement The basic ultramafic rock mass (hereinafter referred to as the rock mass) is located in the eastern section of the ophiolite belt in the south Tibet Yarlung Zangbo River basin and is located in Tibet On the suture between the plate (Eurasia plate) and India plate. The south is the Himalayan gnarled fold belt dominated by the Mesozoic marine sediments. Built for a huge set of marble. The Mesozoic and Cenozoic sediments are composed of Triassic, Cretaceous and Tertiary (Fig. 1). Triassic: The above Triassic Norilsky (T_3 ~ 2) as the representative, widely distributed in the vast rock mass south. Its main