| 江苏盘石山二辉橄榄岩包体的Nd、Sr、Pb同位素特征 |
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| 引用本文： | 陈道公,王银喜.江苏盘石山二辉橄榄岩包体的Nd、Sr、Pb同位素特征[J].地球化学,1994,23(3):245-253. |
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| 作者姓名： | 陈道公 王银喜 |
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| 作者单位： | 中国科技大学地球空间科学系，南京大学现代分析中心 |
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| 摘 要： | 对盘石一带的６个二辉橄榄岩包体，３个单斜辉石的Ｎｄ、Ｓｒ同位素，４个全岩、７个单斜辉石和１个斜方辉石的铅同位素进行了测定。结果表明，它们在亏损的岩石圈中经历了长时间的演化，其Ｒｂ－Ｓｒ、Ｓｍ－Ｎｄ、Ｐｂ－Ｐｂ同位素体系的相关性可能反映了不同时期的地幔过程。位于陆下岩石圈地幔中上部位的包体比下部岩石圈地幔具有相对亏损和不均一的同位素特征。
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| 关 键 词： | 二辉橄榄岩 矿物包体 同位素 钕 |
THE Nd, Sr ANG Pb ISOTOPIC CHARACTERISTICS OF LHERZOLITE XENOLITHS FROM PANSHISHAN,JIANGSU PROVINCE |
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| Chen Daogong,Zhi Xiachen, Li Binxian.THE Nd, Sr ANG Pb ISOTOPIC CHARACTERISTICS OF LHERZOLITE XENOLITHS FROM PANSHISHAN,JIANGSU PROVINCE[J].Geochimica,1994,23(3):245-253. |
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| Authors: | Chen Daogong Zhi Xiachen Li Binxian |
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| Abstract: | The Nd and Sr isotopic compositions of lherzolite xenolith (6 samples)and clinopyroxene(3 samples),as well as the Pb isotopic compositions of the whole rock(4 samples),clinopyroxene (7 samples)and orthopyroxene(1 sample), were determined. The results show that these rocks have experienced a long time in the depleted lithospheric mantle. The regular correlation in the Rb-Sr,Sm-Nd and PbPb isotopic systems may be the reflection of different mantle processes taking place before.The xenoliths occurring in the middle-upper continental lithospheric mantle are more depleted in isotopes than the lower lithospheric mantle. |
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| Keywords: | lherzolite depleted mantle Nd-Sr-Pb isotopes Jiangsu |
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