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新疆阿舍勒铜锌矿区英云闪长岩年代学及地球化学/Geochronology and genesis of tonalites from the Ashele Cu-Zn deposit on the southern margin of Altay, Xinjiang[J]
Authors
CHAI Feng-mei
DONG Lian-hui
+16 more
LI Qiang
LIU Feng
OUYANG Liu-jin
YANG Fu-quan
ZHANG Zhi-xin
中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室,北京,100037
中国科学院新疆生态与地理研究所新疆矿产资源研究中心,新疆乌鲁木齐,830011
刘锋
张志欣
新疆大学新疆中亚造山带大陆动力学与成矿预测实验室,新疆乌鲁木齐,830046
新疆维吾尔自治区地质矿产勘查开发局,新疆乌鲁木齐,830000
李强
杨富全
柴凤梅
欧阳刘进
董连慧
Publication date
1 January 2013
Publisher
Abstract
对新疆阿尔泰南缘阿舍勒铜矿区英云闪长岩进行了锆石LA-ICP-MS U-Pb年龄测定,获得了375.3±2.1Ma和386.2±3.8 Ma的加权平均年龄,表明英云闪长岩形成于早泥盆世晚期一中泥盆世早期.岩石地球化学分析结果表明:所有岩石具有高SiO2(74.72%~77.72%)和中等的A12O3(12.06%~13.5%)含量,低的P2O5(<0.04%)和CaO(0.34%~1.65%)含量,且具有贫碱(K2O+ Na2O=5.84% ~6.59%)、富钠(Na2O/K2O=3.3~ 10.9)、过铝质(A/CNK=1.10~1.18)特点;富集LREE和Th、U、Pb元素,贫P、Sr、Nb、Ta、Ti元素,呈现明显的Eu负异常(δEu=0.47~0.81),属低钾过铝质岩石.综合阿尔泰造山带南缘的区域地质资料及英云闪长岩的地球化学特征,认为阿舍勒铜锌矿区英云闪长岩是早中泥盆世的活动大陆边缘环境陆壳岩石部分熔融的产物
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Last time updated on 29/11/2016