| 秦岭环斑花岗岩的年代学研究及其意义 |
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| 引用本文： | 卢欣祥,尉向东.秦岭环斑花岗岩的年代学研究及其意义[J].高校地质学报,1999,5(4):372-377. |
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| 作者姓名： | 卢欣祥 尉向东 |
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| 作者单位： | [1]河南省地质科学研究所 [2]南京大学成矿作用国家重点实验室 |
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| 基金项目： | 国家自然科学基金!(编号 ,4 9672 111,4 973 182 )资助项目 |
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| 摘 要： | 本文对秦岭环斑花岗岩带进行了系统的测年工作，通过对实测Ｕ－Ｐｂ，Ｒｂ－Ｓｒ，＾４０Ａｒ／＾３９Ａｒ年龄测定结果研究，认为２１０－２１７Ｍａ是秦岭造山带主造山阶段结束的时间，为秦岭主造山期结束提供了确切的语气具有重要的科学意义。
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| 关 键 词： | 环斑花岗岩 主造山期 年龄测定 造山带 花岗岩 |
| 收稿时间： | 1999-12-20 |
| 修稿时间： | 1999-12-20 |
GEOCHRONOLOGICAL STUDIES OF RAPAKIVI GRANITES IN QINLING AND ITS GEOLOGICAL IMPLICATIONS |
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| Lu Xinxing , Wei Xiangdong Xiao Qinghui Zhang Zhongqing Li Huimin Wang Wei.GEOCHRONOLOGICAL STUDIES OF RAPAKIVI GRANITES IN QINLING AND ITS GEOLOGICAL IMPLICATIONS[J].Geological Journal of China Universities,1999,5(4):372-377. |
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| Authors: | Lu Xinxing Wei Xiangdong Xiao Qinghui Zhang Zhongqing Li Huimin Wang Wei |
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| Institution: | 1. Geological Research Institute of Henan Province, Zhengzhou, 450053; 2. State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing, 210093; 3. Chinese Institute of Geology and Mineral Resources Information, Beijing, 100037; 4. Institute of Geology, Chinese Academy of Geological Science, Beijing, l00037; 5. Tianjin Institute of Geology and Mineral Resources, Tianjin, 300170 |
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| Abstract: | The Qinling orogenic belt is a famous continental orogenic belt in the world with signature of multistage and multisystem evolution. It underwent all geological evolutionary processes including preorogenic, climactic orogenic and postorogenic phases But until now, there is still different understanding in the terminal stage of the climactic orogenic phase. Discovery of rapakivi granites distributed in the main suture zone of Qinling orogenic belt (Shangdan tectonic zone) has provided a possibility to solve this important geological problem. It is an indisputable fact that rapakivi granites are regarded as the result of post orogenic magmatism Therefore, the terminal time of the climactic orogenic phase of Qinling belt can be estimated by accurate dating of formation age of the Qinling raprkivi granites Basd on the systematic dating of rapakivi granite belt and analysis of U-Pb, Rb-Sr, 39 Ar- 40 Ar and K-Ar age data in Qinling, we regard 210-217Ma as the termnal time of the Qinling climactic orogenic phase This precise evidence has an important scientific significance in understanding the geological history of the Qinling orogenic belt. |
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| Keywords: | Rapakivi granite climactic orogenic phase dating Qinling orogeny |
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