| 新疆天山干沟加里东花岗岩构造环境 |
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| 引用本文： | 周汝洪,刘正荣,裴江平,邓东松,孙江华,陶玲.新疆天山干沟加里东花岗岩构造环境[J].新疆地质,2009,27(4). |
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| 作者姓名： | 周汝洪 刘正荣 裴江平 邓东松 孙江华 陶玲 |
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| 作者单位： | 1. 新疆维吾尔自治区地质矿产勘查开发局第一区调大队,新疆乌鲁木齐,830000
2. 新疆维吾尔自治区地质矿产,勘查开发局物化探大队,新疆,昌吉,831100 |
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| 摘 要： | 传统研究将新疆天山干沟段博罗科努带花岗岩划为石炭纪或泥盆纪,中天山花岗片麻岩划为加里东期~(1,2]).本文根据1:5万区调成果,将其分别厘定为志留纪和前寒武纪~①.论证了志留纪干沟序列花岗岩构造环境.其序列组成为石英闪长岩-花岗闪长岩/斜长花岗岩/英云闪长岩-二长花岗岩组合,二长花岗岩略多,地球化学特征具典型造山花岗岩特征,K-Na-Ca图解中性段具英云闪长岩趋势,酸性段呈钙碱性趋势,其构造环境为大陆弧.据花岗岩中的斜长石内高岭土和绢云母结晶形态,辨识出研究区志留纪干沟序列花岗岩具绿片岩相变质.
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| 关 键 词： | 博罗科努 中天山 花岗岩 志留纪 大陆弧 干沟 |
TECTONIC SETTING OF THE GANGOU CALEDONIAN GRANITE IN TIANSHAN OF XINJIANG,AND ITS CONTRAST WITH PRECAMBRIAN GRANITE IN MIDDLE TIANSHAN MOUNTAIN |
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| ZHOU Ru-hong,LIU Zheng-rong,PEI Jiang-ping,DENG Dong-song,SUN Jiang-hua,TAO Ling.TECTONIC SETTING OF THE GANGOU CALEDONIAN GRANITE IN TIANSHAN OF XINJIANG,AND ITS CONTRAST WITH PRECAMBRIAN GRANITE IN MIDDLE TIANSHAN MOUNTAIN[J].Xinjiang Geology,2009,27(4). |
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| Authors: | ZHOU Ru-hong LIU Zheng-rong PEI Jiang-ping DENG Dong-song SUN Jiang-hua TAO Ling |
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| Abstract: | In the previous data,granite in the Boluokenu belt of Gangou in Xinjiang is thought to be Carboniferous or Devonian and granite-gneiss in Middle Tianshan Mountain is Caledonian.Based on the results of regional survey at 1:50000,authors think this granite is Silurian and this granite-gneiss is Precambrian.This Paper has demonstrated the tectonic setting of Silurian granite in Gangou sequence,which constitutes the assemblage of quartz diorite-granite diorite/plagioelase granite/toellite diorite-adamellite with more adamellite.Its geochemical feature belongs to the typical orogenic granite.In the K-Na-Ca diagram,intermediate part has the tendency of toellite,and acid part has the tendency of calc-alkaline.According to the above data,its tectonic setting is thought to be continental arc.Based on the crystal shape of kaoline and sericite in plagioelase of granite,it is determined that Silurian granite in Gangou sequence has greenschist facies. |
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| Keywords: | Granite Silurian Continent arc Gangou Middle Tianshan Mountain Boluokenu Xinjiang |
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