| 赣中变质基底Nd模式年龄初步研究及基底地壳的形成时代 |
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| 引用本文： | 胡恭任,章邦桐.赣中变质基底Nd模式年龄初步研究及基底地壳的形成时代[J].铀矿地质,1999,15(3):137. |
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| 作者姓名： | 胡恭任 章邦桐 |
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| 作者单位： | 1. 泉州华侨大学环境保护研究所,福建泉州,362011
2. 南京大学地球科学系,江苏南京,210093 |
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| 基金项目： | 核工业核能资源研究开放实验室研究基金 |
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| 摘 要： | 本文研究了赣东南变质基底的Ｎｄ模式年龄（ＴＤＭ＝１３６０－２１２４Ｍａ，平均为１７５５Ｍａ），结合变质岩的Ｒｂ－Ｓｒ，Ｓｍ－Ｎｄ等时线年龄确认赣中地区存在前寒武纪地壳基底，推测本区还有一个尚未出露的古元古－新太古代的花岗质陆壳，这个陆壳正是元古代的陆源区
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| 关 键 词： | Nd模式年龄 陆壳形成时间 赣中变质基底 |
| 修稿时间： | 1997年6月17日 |
PRELIMINARY STUDY ON THE Nd ISOTOPIC MODEL AGES AND THE FORMATION AGE OF THE METAMORPHLC BASEMENT IN CENTRAL JIANGXI |
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| Hu Gongren,ZHANG Bangtong.PRELIMINARY STUDY ON THE Nd ISOTOPIC MODEL AGES AND THE FORMATION AGE OF THE METAMORPHLC BASEMENT IN CENTRAL JIANGXI[J].Uranium Geology,1999,15(3):137. |
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| Authors: | Hu Gongren ZHANG Bangtong |
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| Abstract: | In this paper,the Nd model ages of the meta basement in central Jiangxi have been studied.The values of T Dm range from 1360 to 2124 Ma with an average of 1755 Ma.Precambrian crustal basement in this region has been determined according to Rb Sr isochron ages of 719 726 Ma and Sm Nd wholerock isochron ages of 1113 Ma.It is inferred that there is a paleoproterozoic neoarchean continental crust in Central Jiangxi which is not exposed,and this continental crust could be the Proterozoic provenance region. |
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| Keywords: | Nd model age Formation age of crust Meta basement in Southeastern Jiangxi Province |
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