| 云南北衙矿区富碱斑岩正长石和白云母的40Ar-39Ar年龄 |
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| 引用本文： | 应汉龙,蔡新平.云南北衙矿区富碱斑岩正长石和白云母的40Ar-39Ar年龄[J].地质科学,2004,39(1):107-110. |
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| 作者姓名： | 应汉龙 蔡新平 |
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| 作者单位： | 中国科学院地质与地球物理研究所, 北京, 100029 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 云南北衙矿区石英正长斑岩岩体在空间上与金、铅锌矿体共生。红泥塘岩体地表岩石正长石的40Ar-39Ar坪年龄和等时线年龄为25.89±0.13Ma和25.72±0.7Ma,万洞山岩体地表以下382m钻孔中岩石的正长石坪年龄和等时线年龄为25.53±0.25Ma和25.50±0.07Ma,分别为两个岩体的形成年龄。但是,万洞山岩体地表团块状白云母的坪年龄和等时线年龄为32.50±0.09Ma和32.34±0.04Ma,为白云母的结晶年龄,也可能是主岩的结晶年龄
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| 关 键 词： | 富碱斑岩 40Ar-39Ar年龄 成岩时代 云南北衙 |
| 文章编号： | 0563-5020(2004)01-0107-04 |
| 收稿时间： | 2002-06-24 |
| 修稿时间： | 2002年6月24日 |
40Ar-39Ar DATINGS OF ORTHOCLASE AND MUSCOVITE FROM ALKALI-RICH PORPHYRIES IN THE BEIYA MINE, YUNNAN |
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| Ying Hanlong,Cai Xinping.40Ar-39Ar DATINGS OF ORTHOCLASE AND MUSCOVITE FROM ALKALI-RICH PORPHYRIES IN THE BEIYA MINE, YUNNAN[J].Chinese Journal of Geology,2004,39(1):107-110. |
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| Authors: | Ying Hanlong Cai Xinping |
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| Institution: | Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The Quartz syenite porphyries were spatially closely associated with gold and lead-zinc ore bodies in the Beiya mine,Yunnan.40Ar-39Ar plateau and isochronal datings of the orthoclase from surface outcrop of the Hongnitang quartz syenite-prophyry yielded 25.89?0.13 Ma and 25.72?0.7 Ma respectively and those of the orthoclase from drill core of the Wandongshan quartz syenite-prophyry,382 m below the surface,yielded 25.53?0.25 Ma and 25.50?0.07 Ma.These ages were crystallizing ages of the host intrusions.The 40Ar-39Ar plateau and isochronal ages of muscovite conglomeration from surface outcrop of the Wandongshan quartz syenite-prophyry were 32.50?0 09 Ma and 32 34?0.04 Ma respectively,representing crystallizing age of muscovite and probably also the age of the host rock. |
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| Keywords: | Alkali rich porphyry 40 Ar 39 Ar datings Intrusion age Beiya in Yunnan |
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