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| 中天山白石头泉岩体年代学、岩石成因及构造意义 | |
| 引用本文： | 刘四海,吴昌志,顾连兴,张遵忠,唐俊华,黎广荣,雷如雄,汪传胜.中天山白石头泉岩体年代学、岩石成因及构造意义[J].岩石学报,2008,24(12):2720-2730. |
| 作者姓名： | 刘四海 吴昌志 顾连兴 张遵忠 唐俊华 黎广荣 雷如雄 汪传胜 |
| 作者单位： | 1. 内生金属矿床成矿机制研究国家重点实验室(南京大学)南京大学地球科学与工程学院,南京,210093;大陆动力学国家重点实验室(西北大学)西安,710069;江苏省有色金属华东地质勘查局,南京,210007 2. 内生金属矿床成矿机制研究国家重点实验室(南京大学)南京大学地球科学与工程学院,南京,210093;大陆动力学国家重点实验室(西北大学)西安,710069;新疆大学地质与勘查工程学院,乌鲁木齐,830046 3. 内生金属矿床成矿机制研究国家重点实验室(南京大学)南京大学地球科学与工程学院,南京,210093;江苏省有色金属华东地质勘查局,南京,210007 4. 江苏省有色金属华东地质勘查局,南京,210007 5. 内生金属矿床成矿机制研究国家重点实验室(南京大学)南京大学地球科学与工程学院,南京,210093 |
| 基金项目： | 国家重点基础研究发展计划项目（2007CB411301）和国家自然科学基金项目（40603008,40672040）资助 |
| 摘 要： | 白石头泉岩体位于中天山北缘边界断裂(沙泉子断裂)南侧。该岩体从下至上可分为五个连续过渡的岩相带,即淡色花岗岩(a带),含天河石花岗岩(b带),天河石花岗岩(c带),含黄玉天河石花岗岩(d带)以及黄玉钠长花岗岩(e带),其中,b、c、d和e带均为a带分异的产物。白石头泉岩体的LA-ICP-MS锆石U-Pb定年结果表明,该岩体侵位于早二叠世早期(295.6±1.3Ma),并于印支期(~214Ma)经历了一次热事件的改造。淡色花岗岩在主量元素上富硅(SiO2= 74.93%~76.18%)、富碱(K2O + Na2O=8.07%~8.80%)、富钠(K2O / Na2O=0.82~0.89),贫钙、镁,而在微量元素上富Rb、F和Ga(Al/Ga比值为2217~3134),贫Ba、Sr和Eu并具强烈的铕负异常(δEu=0.0020~0.0091),反映出其源区为富含白云母的片岩(或片麻岩),成岩压力较低,温度大于860℃。结合区域地质特征,作者等认为白石头泉岩体形成于相对拉张的构造背景,是中-上地壳源岩经历高温贫水熔融的产物,其形成与幔源岩浆内侵作用有关。 |
| 关 键 词： | 天河石 淡色花岗岩 LA-ICP-MS锆石U-Pb定年 内侵 中天山 新疆 |
| 收稿时间： | 2008/5/23 0:00:00 |
| 修稿时间： | 9/8/2008 12:00:00 AM |
Geochronology, petrogenesis and tectonic significances of the Baishitouquan pluton in Middle Tianshan, Northwest China |
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| LIU SiHai,WU ChangZhi,GU LianXing,ZHANG ZunZhong,TANG JunHu,LI GuangRong,LEI RuXiong and WANG ChuanSheng.Geochronology, petrogenesis and tectonic significances of the Baishitouquan pluton in Middle Tianshan, Northwest China[J].Acta Petrologica Sinica,2008,24(12):2720-2730. | |
| Authors: | LIU SiHai WU ChangZhi GU LianXing ZHANG ZunZhong TANG JunHu LI GuangRong LEI RuXiong and WANG ChuanSheng |
| Institution: | State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and engineering, Nanjing University, Nanjing 210093, China;State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and engineering, Nanjing University, Nanjing 210093, China;State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and engineering, Nanjing University, Nanjing 210093, China;Eastern China Geological and Mining Organization for Non-ferrous Metals, Nanjing 210007, China;Eastern China Geological and Mining Organization for Non-ferrous Metals, Nanjing 210007, China;State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and engineering, Nanjing University, Nanjing 210093, China;State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and engineering, Nanjing University, Nanjing 210093, China;State Key Laboratory for Mineral Deposit Research, School of Earth Sciences and engineering, Nanjing University, Nanjing 210093, China |
| Abstract: | The Baishitouquan(BST)granite pluton is situated in the gobi area of Hami County,Xinjinag Uygur Autonomous Region,northwestern China.This pluton exhibits five lithological zones gradational from the bottom upwards:leucogranite(zone a), amazonite-bearing granite(zone b),amazonite granite(zone c),topaz-bearing amazonite granite(zone d)and topaz albite granite (zone e).Preview studies have shown that this pluton was formed overwhelmingly by crystallisation from a melt and magma crystallisation was commenced fr... |
| Keywords: | Amazonite Leucogranite LA-ICP-MS zircon dating Intraplating Middle Tianshan Xinjiang NW China |
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