| 湖北省随州三里岗地区二长花岗岩Rb-Sr、40Ar/39Ar同位素年龄 |
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| 关键词:Sanligang adamellite isotopic chronology |
| 基金项目:国家自然科学基金资助项目(编号:49732080) |
| 作者 | 单位 | E-mail | | 石玉若 | 中国地质科学院地质研究所,北京,100037 | yrshi2002@hotmail.com | | 张宗清 | 中国地质科学院地质研究所,北京,100037 | | | 刘敦一 | 中国地质科学院地质研究所,北京,100037 | | | 唐索寒 | 中国地质科学院地质研究所,北京,100037 | | | 王进辉 | 中国地质科学院地质研究所,北京,100037 | | | 陈文 | 中国地质科学院地质研究所,北京,100037 | | | 张思红 | 中国地质科学院地质研究所,北京,100037 | | | 刘新宇 | 中国地质科学院地质研究所,北京,100037 | |
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| 摘要: |
| Rb-Sr and 40Ar/39Ar Ages of the Adamellite in Sanligang Area |
| The Sanligang adamellite is one of the main tectonic blocks of the Huashan ophiolitic melange and has an intrusive contact with the basic volcanic rocks. The determination of the isotopic age of this adamellite can lead to determining the upper limit of the isotopic chronology of the Huashan ophiolitic melange. The ages of the adamellite in Sanligang area were measured by Sm-Nd, Rb-Sr and 40Ar/39Ar methods. The mean age of the model ages tDM determined by 3 samples is 1 064±105 Ma. 12 whole-rock samples present a Rb-Sr isochron age of 422±53(2o)Ma. Hornblende picked out from the adamellite gives an 40Ar/39Ar age of 141.4±0.3 Ma. The results indicate that the age of the volcanic rocks of the Huashan ophiolitic melange is older than 422 Ma. |
| SHI Yu-ruo,ZHANG Zong-qing,LIU Dun-yi,TANG Suo-hai,WANG Jin-hui,CHEN Wen,ZHANG Si-hong,LIU Xin-yu.2005.Rb-Sr and 40Ar/39Ar Ages of the Adamellite in Sanligang Area[J].Acta Geoscientica Sinica,26(1):17-20. |
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