| 二元混合体系的端元Sm-Nd模式年龄计算方法 |
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| 引用本文： | 杨晓松,胡家杰.二元混合体系的端元Sm-Nd模式年龄计算方法[J].地质科学,1993,28(1):37-43. |
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| 作者姓名： | 杨晓松 胡家杰 |
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| 作者单位： | 中国地质大学地质系 武汉 430074 |
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| 摘 要： | 报道二元混合体系的端元Sm-Nd模式年龄的计算方法,即利用二元混合体系的Rb-Sr、Sm-Nd同位素分析结果,可以计算2个端元的Sm-Nd同位素组成,两端元在混源样品中的质量百分比,以及地壳残留时间。同时计算了广西花山复式花岗岩的端元模式年龄,结果显示该岩体的物质来源于2500Ma华南古陆壳和622Ma从亏损地幔分异出来的大洋地壳的混合物。
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| 关 键 词： | 端元 sm—Nd 模式年龄 二元混合体系 花山复式花岗岩 基底 |
| 收稿时间： | 1991-06-01 |
| 修稿时间： | 1991-06-01; |
CALCULATION METHOD OF END-MEMBER Sm-Nd MODEL AGES IN A TWO COMPONENT MIXING SYSTEM |
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| Yang Xiaosong Hu Jiajie.CALCULATION METHOD OF END-MEMBER Sm-Nd MODEL AGES IN A TWO COMPONENT MIXING SYSTEM[J].Chinese Journal of Geology,1993,28(1):37-43. |
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| Authors: | Yang Xiaosong Hu Jiajie |
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| Institution: | China University of Geosciences, Wuhan 430074 |
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| Abstract: | The paper presents a calculation method of end-member Sm-Nd model ages in a two-component mixing system, which can be used to calculate end-member Sm-Nd isotopic compositions, weight fractions of two end-members in any binary mixture and the model ages. Based on the method, the end-member model ages of Huashan composite granite body have been obtained. The results show that the materials of the granite body were derived from a mixing source at the Huanan basement formed at about 2500 Ma ago and an oceanic crust differentiated from DM with an age of about 622 Ma. |
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| Keywords: | End-member Sm-Nd model ages Two-component mixing system Basement Huashan composite granite body |
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