| Contents of Fixed-Ammonium (NH_4~+) in Lamprophyres in the Zhenyuan Gold Orefield, Yunnan Province, China: Implications for Its Characteristics of the Source Region |
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| 作者姓名： | 吴静 黄智龙 罗泰义 |
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| 作者单位： | Faculty of Land Resource Engineering，Kunming University of Science and Technology，Kunming 650093，China，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，中国科学院知识创新工程项目 |
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| 摘 要： | This paper determined the fixed-ammonium (NH 4) contents of lamprophyres in the Zhenyuan gold orefield, Yunnan Province, China. The results show that the NH 4 contents of minettes in the orefield range from 120×10 -6 to 469×10 -6 and those of kersantites from 74.3 ×10 -6 to 136×10 -6 . These values are higher than those of other mantle-derived rocks (less than 50×10 -6 ), but lower than those of carbonaceous wall rocks in the orefield (from 1200×10 -6 to 1343×10 -6 ). Combining with the Sr isotopic composition, this paper suggested that lamprophyres in the orefield with high NH 4 contents relative to other mantle-derived rocks would not have resulted from the primary magma contaminated by crustal materials in the process of rising or in the magma chamber, but from mantle metasomatism.
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Contents of Fixed-Ammonium (NH4+) in Lamprophyres in the Zhenyuan Gold Orefield, Yunnan Province, China:Implications for Its Characteristics of the Source Region |
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| WU Jing ,HUANG Zhilong ,and LUO Taiyi.Contents of Fixed-Ammonium (NH_4~+) in Lamprophyres in the Zhenyuan Gold Orefield, Yunnan Province, China: Implications for Its Characteristics of the Source Region[J].Chinese Journal of Geochemistry,2004,23(2). |
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| Authors: | WU Jing HUANG Zhilong and LUO Taiyi |
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| Institution: | WU Jing 1),HUANG Zhilong 2),and LUO Taiyi 2)1) |
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| Abstract: | |
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| Keywords: | lamprophyre fixed-ammonium mantle metasomatism Zhenyuan gold orefield Yunnan |
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