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| 江西省金溪—南城湿合岩和花岗岩的岩石地球化学及同位素地球化学研究 | |
| 引用本文： | 胡恭任,于瑞莲,刘丛强.江西省金溪—南城湿合岩和花岗岩的岩石地球化学及同位素地球化学研究[J].岩石矿物学杂志,2001,20(2):103-111. |
| 作者姓名： | 胡恭任 于瑞莲 刘丛强 |
| 作者单位： | 1. 华侨大学材料科学与工程学院,中国科学院地球化学研究所, 2. 中国科学院地球化学研究所, 3. 南京大学 4. 华侨大学材料科学与工程学院, |
| 基金项目： | 福建省自然科学基金(D9910016)、南京大学内生金属矿床成矿机制研究国家重点实验室开放基金和华侨大学科研起动资金联合资助. |
| 摘 要： | 在研究金溪—南城变质混合岩带中混合岩、花岗岩的矿物岩石学基础上,详细研究了它们的Nd、Sr、Pb、O同位素组成.混合岩、花岗岩初始钕同位素组成(143Nd/144Nd)i=0.511689～0.511853,在εNd-T图中位于该地区结晶基底变粒岩、片岩Nd同位素演化域上方,褶皱基底绢云千枚岩Nd同位素演化线下方;初始锶同位素组成( |
| 关 键 词： | 岩石学 花岗岩 同位素地球化学 钕 锶 铅 氧 金溪－南城变质混合岩带 江西 |
| 文章编号： | 1000-6524(2001) 02-0103-09 |
| 修稿时间： | 2000年7月27日 |
Petrology and Isotopic Geochemistry of Jinxi-Nancheng Migmatites and Granites,Jiangxi Province |
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| HU Gong-ren,YU Rui-lian,LIU Cong-qiang.Petrology and Isotopic Geochemistry of Jinxi-Nancheng Migmatites and Granites,Jiangxi Province[J].Acta Petrologica Et Mineralogica,2001,20(2):103-111. | |
| Authors: | HU Gong-ren YU Rui-lian LIU Cong-qiang |
| Institution: | HU Gong-ren 1,2,3,YU Rui-lian1,LIU Cong-qiang2 |
| Abstract: | Jinxi-Nancheng metamorphic migmatite zone composed mainly of Jinxi igneous mass amd controlled by various ductile shear zones is a multi-facies, multi-type and progressive metamorphic zone. On the basis of a comprehensive petrological and mineralogical study of Jinxi_Nancheng metamorphic migmatite zones, their Nd-Sr-Pb-O isotopic geochemistry has been investigated in detail. The initial Nd and Sr isotopic compositions of migmatites and granites are 0.511689～0.511853 and 0.74864～0.75257 respectively. δ18O values of migmatites and granites are 10.23‰～14.89‰, similar to the δ18O values of high O granites(>10‰). Below the evolution line of sericite schist of folded-basement in the εNd-T evolution diagram, initial Nd isotopic composition of migmatites and granites is apparently located in the evolution area of granulitite and schist of crystalline-basement. Their contents of radiogenic Pb are relatively low, with μ being 10.07～10.4, and their Pb isotopic compositions are above the evolution line of the upper crust. The above features show that migmatites and granites in Jinxi-Nancheng migmatite zone are formed by partial remelting of O-rich and highly-matured granulitite and schist. |
| Keywords: | migmatites petrology Nd Sr Pb O isotopic geochemistry Jinxi-Nancheng metamorphic migmatites zone |
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