| 新疆哈拉奇辉绿岩岩脉地球化学特征及构造意义 |
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| 引用本文： | 陈代鑫,孙军刚,刘晓煌,鲁世朋,张新勇,张维新.新疆哈拉奇辉绿岩岩脉地球化学特征及构造意义[J].西北地质,2013(4):81-92. |
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| 作者姓名： | 陈代鑫 孙军刚 刘晓煌 鲁世朋 张新勇 张维新 |
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| 作者单位： | [1]中国地质大学（北京）地球：件学与资源学院,北京100083 [2]武警黄金第七支队,山东烟台264000 |
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| 基金项目： | 中国地质调查局项目“西部地区重要金属矿产资源调查评价”（1212011120495） |
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| 摘 要： | 新疆哈拉奇地区出露的辉绿岩岩脉为研究西南天山地区的区域大地构造演化提供了重要信息。哈拉奇地区辉绿岩岩脉亏损高场强元素Nb、Ta和重稀土元素Yb、Y，富集大离子亲石元素Ba、Sr、K和轻稀土元素La、Ce，具亏损地幔的元素地球化学特征。可以理解为亏损的地幔在板块俯冲时受到板块俯冲改造，表明在晚石炭-早二叠纪时工作区应处于岛弧环境。
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| 关 键 词： | 辉绿岩 晚石炭-早二叠纪 哈拉奇 |
Geochemistry Characteristics,and Tectonic Significance of Diabase Dikes in Halaqi Region,Xinjiang |
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| CHEN Dai-xin,SUN Jun--gang,＇,LIU Xiao-huang,LU Shi-peng,ZHANG Xin-yong,ZHANG Wei-xin.Geochemistry Characteristics,and Tectonic Significance of Diabase Dikes in Halaqi Region,Xinjiang[J].Northwestern Geology,2013(4):81-92. |
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| Authors: | CHEN Dai-xin SUN Jun--gang ＇ LIU Xiao-huang LU Shi-peng ZHANG Xin-yong ZHANG Wei-xin |
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| Institution: | 2 (1. School of Earth Sciences and ResourcesInstitute of Land Resources and High Techniques, China University of Geosciences, Beijing 100083, China 2. No. 7 Gold Geological Party, CAPF, Yantai 264000, China) |
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| Abstract: | The outcrop of diabase dikes in Halaqi of Xinjiang has provided important information for tectonic evolution of southwest Tianshan area. The diabase dikes in Halaqi area lack HFSE （Nb, Ta） and HREE （Yb, Y）, and exhibit enrichment in LILE （Ba, St, K） and LREE （La, Ce）. With the geochemical characteristics of depleted mantle, it can be understood as the mantle was transformed by subduction in plate subduction, indicating that during the Late Carboniferous-Early Permian, the region should have been in the island arc environment. |
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| Keywords: | Diabase dike Late Carboniferous-Early Permian Halaqi |
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