| 鄂西北地区耀岭河群同位素年龄讨论 |
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| 引用本文： | 王寿琼. 鄂西北地区耀岭河群同位素年龄讨论[J]. 资源环境与工程, 1996, 0(1) |
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| 作者姓名： | 王寿琼 |
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| 作者单位： | 鄂西北地质矿产调查所 |
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| 基金项目： | 地矿部秦巴重点片“八五”找矿科技攻关二级课题 |
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| 摘 要： | 木文据耀岭河群变质火山岩中，获得的Ｓｍ—Ｎｄ等时线年龄值Ｒｂ—Ｓｒ等时线年龄值，单锆石２０６Ｐｂ／２３８Ｕ的年龄值并结合Ｐｂ、Ｏ同位素研究认为本区因多次构造运动的影响，使同位素均一化，Ｓｍ—Ｎｄ及Ｒｂ—Ｓｒ部分等时线年龄偏低，而单锆石的年龄值，证明兴凯运动早期曾在本区产生热事件。结合区域地质资料，本区耀岭河群的年龄应在７１１—８０５．８Ｍａ之间。
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| 关 键 词： | 鄂西北，耀岭河群，同位素，等时线年龄值 |
A DISCUSSION ON THE ISOTOPIC DATING FOR YAOLINGHE GROUP IN NORTH WESTERN HUBEI |
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| Wang Shouqiang. A DISCUSSION ON THE ISOTOPIC DATING FOR YAOLINGHE GROUP IN NORTH WESTERN HUBEI[J]. Resources Environment & Engineering, 1996, 0(1) |
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| Authors: | Wang Shouqiang |
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| Affiliation: | Northwestern Hubei Survey of geology and mineral resources |
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| Abstract: | Based on the analysis of Sin -Nd and Rb-Sr isochron ages and the single zircon 206Ph/238U ages obtained from the meta-vocanic rocks of Yaolinghe group in northwestern Hubei, combined with the study of Ph, O isotopic geology, it is considered that the iaotopic system have tended to homogeneity and parts of the Sin-Nd, Rb-Sr isochron ages have been on the low side as a result of the various tectonic movements in this area. On the other side, ages obtained from the single zircons comfirm that there occured a thermal event in the early stage of Xingkai movement in this area. Combined with the regional geology data,the age of the protolith of Yaolinhe group is thought to be 711 -805. 8Ma. |
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| Keywords: | Northewestern Hubei Yaolinghe group isotope isochron age. |
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