| 秦岭—大别造山带区域地壳Sm-Nd同位素组成及其意义 |
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| 引用本文： | 侯广顺,曹树凯,杨贺杰.秦岭—大别造山带区域地壳Sm-Nd同位素组成及其意义[J].甘肃地质学报,2010(1):15-20. |
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| 作者姓名： | 侯广顺 曹树凯 杨贺杰 |
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| 作者单位： | 河南理工大学资环学院; |
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| 基金项目： | 河南理工大学博士基金资助 |
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| 摘 要： | 对秦岭—大别造山带大量Nd同位素资料进行统计,获得了该地区陆壳基底和区域花岗岩类的147Sm/144Nd平均值,分别为0.136和0.108。基于区域资料获得的二阶段亏损地幔模式年龄(T2DM)比用147Sm/144Nd=0.118做参数的计算结果要普遍偏老,两种结果的差异随着模式年龄的偏老明显偏大。本研究获得的该区域地壳147Sm/144Nd组成特征与元素丰度资料之间存在较大差异,结合稀土元素综合对比,表明前人获得的该区域元素丰度资料偏酸性。
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| 关 键 词： | Sm-Nd同位素 组成特征 元素丰度 秦岭—大别造山带 |
THE COMPOSITE CHARACTER OF REGIONAL CRUSTAL Sm-Nd ISOTOPES AND THEIR IMPLICATION FOR QINLING-DABIE OROGENIC BELT |
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| HOU Guang-shun,CAO Shu-kai and YANG He-jie.THE COMPOSITE CHARACTER OF REGIONAL CRUSTAL Sm-Nd ISOTOPES AND THEIR IMPLICATION FOR QINLING-DABIE OROGENIC BELT[J].Acta Geologica Gansu,2010(1):15-20. |
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| Authors: | HOU Guang-shun CAO Shu-kai and YANG He-jie |
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| Institution: | College of Resources and Environments;Henan Polytechnic University;Jiaozuo 454000;China |
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| Abstract: | It is of important significance to calculate the two stage depleted mantle model age of Nd isotope for crustal residence age. But so far the important parameter 147Sm / 144Nd has not been determined. The mean 147Sm / 144Nd of crustal base and regional granite are 0.136 and 0.108 respectively on the basis of a large amount of Nd isotope in Qinling-Dabie orogenic belt. The two stage depleted mantle model age using regional data is older than that of 147Sm / 144Nd=0.118. There is some difference on 147Sm / 144... |
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| Keywords: | Sm-Nd isotope composite character element abundance Qinling-Dabie orogenic belt |
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