| Sm-Nd, Pb-Pb and Rb-Sr Isotopic Dating and Its Dynamic Implications for the Proterozoic Augen Granite in the Yunkai Area, Western Guangdong Province |
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| 作者姓名： | PENG Songbai ZHANG Yeming ZHAN Mingguo CHEN Fuwen and QIU Ruizhao Yichang Institute of Geology and Mineral Resources CAGS Yichang Hubei |
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| 作者单位： | PENG Songbai，ZHANG Yeming，ZHAN Mingguo，CHEN Fuwen and QIU Ruizhao Yichang Institute of Geology and Mineral Resources，CAGS，Yichang 443003，Hubei |
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| 基金项目： | 中国科学院资助项目，the key project of Science and Technology of the Ninth Five-Year Plan of the Ministry of Geology and Mineral Resources，grant 49502036，95-02-007，， |
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| 摘 要： | The samples of ductile-rheologic deformational augen granite from the Yunkai uplift area, western Guangdong province, were determined by the whole-rock Sm-Nd, Pb-Pb and Rb-Sr isotopic dating to have an Sm-Nd isochron age of 1414±68 Ma, a Pb-Pb isochron age of 1388±90 Ma and a Rb-Sr isochron age of 490±36 Ma. The first two ages are interpreted as the formation age of this suite of granite and the last age represents the timing of the tec-tono-thermal event of Caledonian ductile-rheologic shear partial melting. It is indicated that in the study area not only an orogeny took place in the Caledonian, but also a more important tectono-magmatic activity occurred in the Meso-proterozoic there , which may be related to the subduction-collision between the Yangtze block and Cathaysia block.
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| 关 键 词： | Yunkai area Proterozoic augen granite |
Sm-Nd, Pb-Pb and Rb-Sr Isotopic Dating and Its Dynamic Implications for the Proterozoic Augen Granite in the Yunkai Area, Western Guangdong Province |
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| Authors: | PENG Songbai ZHANG Yeming ZHAN Mingguo CHEN Fuwen and QIU Ruizhao Yichang Institute of Geology and Mineral Resources CAGS Yichang Hubei |
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| Abstract: | The samples of ductile‐rheologic deformational augen granite from the Yunkai uplift area, western Guangdong province, were determined by the whole‐rock Sm‐Nd, Pb‐Pb and Rb‐Sr isotopic dating to have an Sm‐Nd isochron age of 1414±68 Ma, a Pb‐Pb isochron age of 1388±90 Ma and a Rb‐Sr isochron age of 490±36 Ma. The first two ages are interpreted as the formation age of this suite of granite and the last age represents the timing of the tectono‐thermal event of Caledonian ductile‐rheologic shear partial melting. It is indicated that in the study area not only an orogeny took place in the Caledonian, but also a more important tectono‐magmatic activity occurred in the Meso‐proterozoic there, which may be related to the subduction‐collision between the Yangtze block and Cathaysia block. |
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| Keywords: | Yunkai area Proterozoic augen granite isotopic dating ductile-rheologic shear |
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