| 苏州复式花岗岩体的精确40Ar—39Ar定年 |
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| 引用本文： | 陈江峰 Fola.,KA.苏州复式花岗岩体的精确40Ar—39Ar定年[J].岩石学报,1993,9(1):77-85. |
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| 作者姓名： | 陈江峰 Fola. KA |
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| 作者单位： | 中国科学技术大学地球和空间科学系，Department of Geological Sciences The Ohio State University，中国科学院地球化学研究所 合肥 230026，广州 510640 |
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| 摘 要： |
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| 关 键 词： | 花岗岩 岩体 氩40－氩39 年龄 氩 |
PRECISE ~(40)Ar-~(39)Ar DATING OF THE SUZHOU COMPOSITE GRANITE |
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| Chen Jiangfeng.PRECISE ~(40)Ar-~(39)Ar DATING OF THE SUZHOU COMPOSITE GRANITE[J].Acta Petrologica Sinica,1993,9(1):77-85. |
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| Authors: | Chen Jiangfeng |
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| Abstract: | The Suzhou composite granite is composed of intrusions of three stages. Biotites from different rock units of the Suou body are dated by the ~(40)Ar-~(39)Ar technique. Because of a specially designed irradiation configuration the uncertainties in J value due to the effects of fluence gradient is canceled. Therefore, very small possible age difference between different rock units can be compared. The result indicates that the Suzhou composite intrusion was formed at about 123 Ma in a short time span perhaps less than 0.5Ma. |
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| Keywords: | Precise ~(40)Ar-~(39)Ar dating Suzhou Composite granite |
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