| 打古寨——罗布里两种类型花岗岩的同位素地质研究 |
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| 引用本文： | 沈渭洲,张祖还,郑永飞.打古寨——罗布里两种类型花岗岩的同位素地质研究[J].南京大学学报(自然科学版),1988(3). |
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| 作者姓名： | 沈渭洲 张祖还 郑永飞 |
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| 作者单位： | 南京大学地球科学系，南京大学地球科学系，南京地质矿产研究所 |
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| 摘 要： | 本文研究的打古寨和罗布里岩体是桃山复式花岗岩体内部两种不同成因类型的岩体,成岩时代均为燕山早期。根据Sr,Pb,O和S同位素资料,结合地质特征,笔者认为打古寨岩体是由上部地壳重熔改造形成,属陆壳改造型花岗岩;罗布里岩体是由壳幔混合岩浆形成,属同熔型花岗岩。
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| 关 键 词： | 同位素年龄 改造型 同熔型 地壳重熔 壳-幔混合岩浆 水-岩同位素交换 |
A STUDY ON ISOTOPIC GEOLOGY OF GRANITIC ROCKS OF TWO GENETIC TYPES IN DAGUZHAI-LUOBULI |
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| Shen Weizhou Zhang Zuhuan.A STUDY ON ISOTOPIC GEOLOGY OF GRANITIC ROCKS OF TWO GENETIC TYPES IN DAGUZHAI-LUOBULI[J].Journal of Nanjing University: Nat Sci Ed,1988(3). |
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| Authors: | Shen Weizhou Zhang Zuhuan |
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| Abstract: | Daguzhai-Luobuli granitic rocks, situated in Taoshan composite granitic batholith, are the two bodies of different genetic types. According to Rb-Sr isochron dating, it has been determined that their formation originated in the Early-Yanshanian. Based on Sr, Pb, O and S isotope data and their geological charateristics, it is believed that the Daguzhai granite body was formed by trans-formation of upper crustal materials through remelting and belongs to the transformation type while the Luobuli granite body was formed by mixing the mantle derived magma with crustal rocks and belongs to the syntexis type. |
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| Keywords: | isotopic dating transformation type syntexis type crustal remelting crustal-mantle mixed magma water-rock isotopic exchange |
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