| 皖南东源含W、Mo花岗闪长斑岩及成矿年代学研究 |
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| 引用本文： | 周翔,余心起,王德恩,张德会,李春麟,傅建真,董会明.皖南东源含W、Mo花岗闪长斑岩及成矿年代学研究[J].现代地质,2011,25(2):201-210. |
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| 作者姓名： | 周翔 余心起 王德恩 张德会 李春麟 傅建真 董会明 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083
2. 安徽省地质矿产勘查局332地质队,安徽黄山,245000 |
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| 基金项目： | 安徽省国土资源厅公益性地质(科研)工作项目 |
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| 摘 要： | 在详细野外观察、剖面测量和研究分析的基础上,对"江南古陆"东段北缘的皖南祁门东源含W、Mo斑岩体进行了锆石U-Pb测年,重点讨论了成岩成矿关系和成矿物质来源。东源中细粒似斑状花岗闪长斑岩呈小岩株产出,SHR IMP锆石U-Pb测年结果为(146±1)M a,其内辉钼矿Re-Os同位素测年结果为(146.4±2.3)M a,成矿与岩体形成同期,均形成于晚侏罗世。辉钼矿的Re含量(22.02×10-6~98.09×10-6)指示成矿物质来源为壳幔混源。
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| 关 键 词： | 花岗闪长斑岩 SHRIMP锆石U-Pb测年 Re-Os测年 皖南东源 |
Characteristics and Geochronology of the W, Mo-bearing Granodiorite Porphyry in Dongyuan, Southern Anhui |
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| ZHOU Xiang,YU Xin-qi,WANG De-en,ZHANG De-hui,LI Chun-lin,FU Jian-zhen,DONG Hui-ming.Characteristics and Geochronology of the W, Mo-bearing Granodiorite Porphyry in Dongyuan, Southern Anhui[J].Geoscience——Journal of Graduate School,China University of Geosciences,2011,25(2):201-210. |
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| Authors: | ZHOU Xiang YU Xin-qi WANG De-en ZHANG De-hui LI Chun-lin FU Jian-zhen DONG Hui-ming |
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| Institution: | ZHOU Xiang1,YU Xin-qi1,WANG De-en2,ZHANG De-hui1,LI Chun-lin1,FU Jian-zhen2,DONG Hui-ming2(1.School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China,2.332 Geological Team of Anhui Bureau of Geology and Mineral Resources,Huangshan,Anhui 245000,China) |
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| Abstract: | Based on the field investigation,profiling and geochemical testing in detail,the systematic studies have been performed on geochronology of the Dongyuan W,Mo-bearing granodiorite porphyry in southern Anhui.The Sensitive High Resolution Ion Micro Probe(SHRIMP) U-Pb zircon dating yields a concordant age of(146 ±1) Ma for granodiorite,suggesting that the intrusive body was formed during the Late Jurassic.While the Re-Os dating result of 146 Ma shows that the molybdenite from the body was formed in the Late Jurassic,the same stage when the intrusive body formed.The content of Re from the molybdenite(22.02×10-6-98.09×10-6) shows that the ore-forming materials are derived from the crust-mantle mixed source. |
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| Keywords: | granodiorite porphyry SHRIMP U-Pb zircon dating Re-Os dating Dongyuan southern Anhui |
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