| 湖南芙蓉锡矿田Rb-Sr同位素年龄及其地质意义 |
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| 关键词:isochron age Rb-Sr isotope Furong tin orefield Hunan |
| 基金项目:本文为中国地质调查局项目“金属矿床精确定年技术方法及地质应用研究”（编号:1212010560901)成果之一。 |
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| Rb-Sr Isotopic Ages of the Furong Tin Orefield in Hunan and Their Implications |
| Rb-Sr isotopic analysis of 23 samples was made far porphyroid biotite admellite, biotite admellite and tin-bearing greisen from the Furong orefield, Hunan Province. Three groups of isochron ages were obtained, i.e.，155±6 Ma, 141±6 Ma and 146±3 Ma, respectively. Among these data, the first one indicates the main emplacement episode of Furong granite during Early-Middle Jurassic, and the last two show another magrnatic intrusion and mineralization period probably occurring in Late Jurassic. Based on these data, the authors hold that the tin orefield was tectonically formed during the crustal conversion from compression-shearing to extension, with no direct genetic relationship with the main intrusion episode of Furong granite |
| MA Liyan,LU Yuanfa,MEI Yuping,CHEN Xiqing,YANG Hongmei.2005.Rb-Sr Isotopic Ages of the Furong Tin Orefield in Hunan and Their Implications[J].Acta Geoscientica Sinica,26(z1):143-145. |
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