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| 岩浆到热液演化的包裹体记录——以骑田岭花岗岩体为例 | |
| 引用本文： | 单强,廖思平,卢焕章,李建康,杨武斌,罗勇.岩浆到热液演化的包裹体记录——以骑田岭花岗岩体为例[J].岩石学报,2011,27(5):1511-1520. |
| 作者姓名： | 单强 廖思平 卢焕章 李建康 杨武斌 罗勇 |
| 作者单位： | 1. 中国科学院广州地球化学研究所,中国科学院矿物学与成矿学重点实验室,广州,510640 2. 江西省地质调查研究院,南昌,330030 3. 中国科学院广州地球化学研究所,中国科学院矿物学与成矿学重点实验室,广州,510640;加拿大魁北克大学,Chicoutimi,P.,Q.G 4. 中国地质科学院矿产资源研究所,北京,100037 5. 中国科学院广州地球化学研究所,中国科学院矿物学与成矿学重点实验室,广州,510640;中国科学院研究生院,北京,100049 |
| 基金项目： | 本文受国土资源部公益性行业科研专项经费项目(201011046)资助. |
| 摘 要： | 骑田岭花岗岩是燕山期花岗岩早期多阶段侵入复式岩体,岩石化学的研究表明它是富碱的、高分异的A型花岗岩,形成于板内拉张的构造环境。在其第二阶段中细粒黑云母花岗岩内广泛发育着厘米级至米级似伟晶岩囊状体和石英晶洞, 它们是富挥发份岩浆固结的产物,代表岩石形成过程经历了明显的岩浆-热液过渡阶段。包裹体显微岩相学研究在骑田岭黑云母花岗岩的石英中发现熔体-流体包裹体和流体包裹体共存,这一结果进一步证实骑田岭中细粒黑云母花岗岩中的似伟晶岩囊状体和石英晶洞是花岗质熔体在岩浆-热液过渡阶段的产物。显微测温结果显示,熔体-流体包裹体的捕获温度大于530℃,说明岩浆热液过渡阶段的温度不低于该温度;闪锌矿中流体包裹体的均一温度在285~417℃之间,盐度为11.7% NaCleqv,代表了成矿流体的温度和盐度;流体包裹体的均一温度为172~454℃,代表热液阶段流体的温度。从中细粒黑云母花岗岩到似伟晶岩囊状体再到石英晶洞,岩浆-热液体系经历了富挥份熔体→熔体+高盐度流体→高盐度流体→低盐度流体的完整演化过程,形成了CaCl2-NaCl-H2O-CO2体系的岩浆热液流体。包裹体岩相学及激光拉曼探针分析结果显示,在流体包裹体和多晶熔体-流体包裹体中含有长石、方解石、金红石及金属氧化物等子矿物,暗示其所捕获的流体具有较强的成矿能力。 |
| 关 键 词： | 熔体包裹体 熔体-流体包裹体 岩浆-热液过渡 不混溶作用 骑田岭 |
| 收稿时间： | 2010/11/10 0:00:00 |
| 修稿时间： | 2011/3/29 0:00:00 |
Fluid inclusion records from the magmatic to hydrothermal stage: A case study of Qitianling granite pluton. |
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| SHAN Qiang,LIAO SiPing,LU HuanZhang,LI JiangKang,YANG WuBin and LUO Yong.Fluid inclusion records from the magmatic to hydrothermal stage: A case study of Qitianling granite pluton.[J].Acta Petrologica Sinica,2011,27(5):1511-1520. | |
| Authors: | SHAN Qiang LIAO SiPing LU HuanZhang LI JiangKang YANG WuBin and LUO Yong |
| Institution: | Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou 510640, China;Jiangxi Provincial Institute of Geological Survey, Nanchang 330030, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou 510640, China;University of Quebec, Chicoutimi, P.Q.G7H7B1, Canada;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou 510640, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou 510640, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | Qitianling granite is a complex massif with multi-stage intrusions during the Early Yanshanian Period.Petrochemical data show that it belongs to alkali-rich and highly evolved A-type granite formed in tension setting within a plate.The centimetre-and metre-sized pegmatoid cystidium and miarolitic quartz widely occurred in the second stage medium-fine grain biotite granite,implying that it is resulted from differentiation of the oversaturated-volatile magma.In addition,the coexist of melt-fluid inclusions an... |
| Keywords: | Melt inclusion Melt-fluid inclusion Magmatic-hydrothermal transition Immiscibility Qitianling |
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