周维全, 林文信. 1982: 澜沧江变质带南段蓝闪石片岩特征. 地质通报, (2): 76-85.
    引用本文: 周维全, 林文信. 1982: 澜沧江变质带南段蓝闪石片岩特征. 地质通报, (2): 76-85.
    ZHOU Wei-quan, LIN Wen-xin. 1982: THE FEATURES OF THE GLAUCOPHANE SCHIST IN THE SOUTHERN PART OF THE LANCANG JIANG METAMORPHIC BELT. Geological Bulletin of China, (2): 76-85.
    Citation: ZHOU Wei-quan, LIN Wen-xin. 1982: THE FEATURES OF THE GLAUCOPHANE SCHIST IN THE SOUTHERN PART OF THE LANCANG JIANG METAMORPHIC BELT. Geological Bulletin of China, (2): 76-85.

    澜沧江变质带南段蓝闪石片岩特征

    THE FEATURES OF THE GLAUCOPHANE SCHIST IN THE SOUTHERN PART OF THE LANCANG JIANG METAMORPHIC BELT

    • 摘要: 一、前言云南西部澜沧江变质带,主要由北部的崇山群,西部的勐统群以及南部的澜沧群组成。在云南境内长约七百公里,北部基本上沿澜沧江分布,南部展布于澜沧江西侧。南段的澜沧群,分布在云县、澜沧、勐海至国境线一带,据范承钧的意见,在区域构造上,属于澜沧江哀牢山褶皱带的一部分,次一级构造单元为临沧—澜沧复背斜,其西

       

      Abstract: This paper preliminarily summarizes the metamorphic rocks and the restoration of their original rocks in the southern part of the Lancang Jiang metamorphic belt in the Huiminxiding region. The glaucophane greenschist facies series is distinguished. According to the appearance of the low-temperature and high-pressure minerals such as glaucophane, barroisite, phengite, riebeckite and stilpnomelane and the. detailed mineralogical study of 3T-type phengite, the temperature and pressure of the glaucophane greenschist facies series are determined to be 200—250℃ and 6—7 kb respectively, the geothermal gradient 12℃/km, and the age of the low-temperature highpresure metamorphism 240—260 m.y.P.Thus it is thought that the Lancang River metamorphic belt is situated in the subduction zone of a plate.

       

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