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现代地质 ›› 2011, Vol. 25 ›› Issue (2): 201-210.

• 岩石学 • 上一篇    下一篇

皖南东源含W、Mo花岗闪长斑岩及成矿年代学研究

ZHOU Xiang 1, YU Xin qi1, WANG De en 2, ZHANG De hui 1, LI Chun lin1, FU Jian zhen2,  DONG Hui ming2   

  1. 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)
  • 出版日期:2011-04-25 发布日期:2011-05-13
  • 通讯作者: 余心起,男,教授,1962年出生,构造地质学专业,主要从事构造地质学及沉积大地构造学的研究和教学工作。
  • 作者简介:周翔,男,学士,1987年出生,构造地质学专业,从事应用构造地质学研究。Email: zhouxiangcugb@foxmail.com。
  • 基金资助:

    安徽省国土资源厅公益性地质(科研)工作项目(2009-20)。

Characteristics and Geochronology of the W, Mo-bearing Granodiorite  Porphyry in Dongyuan, Southern Anhui

周翔1,余心起1,王德恩 2,张德会 1,春麟 1,傅建真 2,董会明 2   

  1. 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing100083, China;
    2. 332 Geological Team of Anhui Bureau of Geology and Mineral Resources, Huangshan, Anhui245000, China
  • Online:2011-04-25 Published:2011-05-13

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,SHRIMP锆石U-Pb测年结果为(146±1)Ma,其内辉钼矿Re-Os同位素测年结果(146.4±2.3) Ma,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。

关键词: 花岗闪长斑岩, SHRIMP锆石U-Pb测年, Re-Os测年, 皖南东源

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.

Key words: granodiorite porphyry, SHRIMP U-Pb zircon dating, Re-Os dating, Dongyuan, southern Anhui

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