| 滇西哀牢山构造岩浆岩带阿扎鲁花岗岩岩石地球化学特征及构造背景浅析 |
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| 引用本文： | 赵亚男,肖渊甫,李洪孝,肖瑞卿,郑琅,沈立军.滇西哀牢山构造岩浆岩带阿扎鲁花岗岩岩石地球化学特征及构造背景浅析[J].地质科技通报,2015,34(5):27-30. |
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| 作者姓名： | 赵亚男 肖渊甫 李洪孝 肖瑞卿 郑琅 沈立军 |
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| 作者单位： | 1. 四川省地质矿产勘查开发局川西北地质队检测中心, 四川 绵阳 621000; |
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| 基金项目： | 中国地质调查局项目(1212011220386) |
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| 摘 要： | 阿扎鲁岩体分布于哀牢山构造岩浆岩带中,通过野外地质调查与岩体剖面测量、岩石样品采集分析、薄片显微镜下鉴定等手段与方法,对其野外地质特征、岩石学特征及岩石地球化学特征进行了系统研究,并探讨了其形成的构造环境。研究结果表明,阿扎鲁岩体的岩性为花岗岩,岩体分布明显受断裂控制;岩石局部可见后期变质的片岩及糜棱岩,岩石具浅层侵入的特点;阿扎鲁花岗岩的A/NCK多大于1.0,为铝饱和型;具有富硅钾、低钙、贫铁、镁、钛的特点,岩石为高钾钙碱性系列。其主量元素、微量元素及稀土元素地球化学特征均表明,该岩体形成于造山期碰撞后期的弧陆碰撞阶段。
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| 关 键 词： | 哀牢山构造岩浆岩带 花岗岩 地球化学特征 构造背景 阿扎鲁 滇西 |
| 收稿时间： | 2015-07-18 |
Geochemical Characteristics and Tectonic Setting of A Zhalu Granite in Ailaoshan Structure Magmatic Belt,Western Yunnan Province |
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| Affiliation: | 1. Testing Center of Northwest Sichuan Geological Team, Mianyang Sichuan 621000, China;2. Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | A Zhalu granite is located in the Ailaoshan structure magmatic belt.The granite is studied in the aspects of its geochemical characteristics and tectonic setting.The study shows that its distribution is obviously controlled by faults and the rock is characterized by shallow intrusion.Locally,the rock body is found with visible schist and mylonite of synantexis metamorphosed in the later period..The A/NCK of A Zhalu granite is mostly more than1,belonging to aluminum saturation.The granite has the characteristics of rich Si and K,low Ca,and poor Fe,Mg and Ti,indicating that it belongs to the high K Ca alkaline series.The geochemical analysis of major elements,trace elements,and rare elements show that the rock was formed in the arc continent collision stage of late stage orogenic collision. |
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