| 大别造山带花岗岩类和正片麻岩的Rb／Sr分区 |
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| 引用本文： | 金成伟,郑祥身.大别造山带花岗岩类和正片麻岩的Rb／Sr分区[J].岩石学报,2000,16(3):420-424. |
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| 作者姓名： | 金成伟 郑祥身 |
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| 作者单位： | 中国科学院地质与地球物理研究所,北京,100029 |
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| 基金项目： | 国家自然科学基金 (批准号 :497940 42和 49672 10 7)资助项目 |
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| 摘 要： | 根据花岗岩类和片麻岩的Ｒｂ／Ｓｒ比值和其他岩相学和地球化学性质,大别造山带可以分为下列四个带：（１）北大别北带：是一个灰色片麻岩和基性、超基性岩带,其灰色片麻岩的Ｒｂ／Ｓｒ比值为０．０１～０．０９;（２）北大别南带：为中酸性岩浆活动和强裂混合岩化的区域,其片麻岩的Ｒｂ／Ｓｒ比值为０．１１％～０．４０,花岗岩类为０．３％～０．９;（３）南大别带：为一构造混杂带,超高压变质作用和岩浆活动和混合岩化均有
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| 关 键 词： | 大别造山带 花岗岩类 正片麻岩 铷／锶比值 |
The
Rb/Sr characters of granitiods and orthogneisses at the Dabie Mountains |
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| Jin Chengwei and Zheng Xiangshen.The
Rb/Sr characters of granitiods and orthogneisses at the Dabie Mountains[J].Acta Petrologica Sinica,2000,16(3):420-424. |
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| Authors: | Jin Chengwei and Zheng Xiangshen |
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| Institution: | Jin Chengwei and Zheng Xiangshen.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China. |
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| Abstract: | Based on the ratios of Rb/Sr and other
characters of geochemistry, the Dabie Mountains could be divided into four belt. They are,
from north to south, Northern belt of North Dabie (NNDB), Southern belt of North Dabie
belt (SNDB), Sourth Dabie belt (SDB) and Yangtze belt (YZB). NNDB is composed mainly of
grey gneisses, that have Rb/Sr ratios of 0.01～0.09 and mafic-ultramafic rocks. SNDB has a lot of acid
intrusion, Rb/Sr ratio of 0.3～0.9 and trondhjemiyic gneisses, having Rb/Sr ratios of 0.11～0.40. SDB is characterized by the occurrence of UHP rock.
Studies on the ratios of Rb/Sr indicated a value of 0.05～0.07. YZB is mainly composed of grey gneisses and gneissic
granites, that have Rb/Sr ratios of 0.04～0.27. |
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| Keywords: | Dabie Mountains Granitoids Orthogneisses Ratios of Rb/Sr |
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