| 桃山、诸广复式岩体花岗岩类岩石铀、钍地球化学特征 |
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| 引用本文： | 余达淦,汪明.桃山、诸广复式岩体花岗岩类岩石铀、钍地球化学特征[J].华东地质学院学报,1988(4). |
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| 作者姓名： | 余达淦 汪明 |
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| 摘 要： | 通过对桃山、诸广复式岩体的深入研究,得出铀、钍元素在本地区花岗岩中具有以下地球化学特征及地球化学行为:1.岩体的铀、钍丰度与岩体外接触带的变质岩铀,钍丰度具同步增长特点;2.铀与硅、钾、钠关系密切,并有随钾增长,及随铀增长二种趋势,而钍则与TiO_2、FeO、MnO关系密切;3.钍在花岗岩中分布型式为正态分布,变异系数较铀小,而铀在花岗岩中分布型式为正态分布及对数正态分布,变异系数略高,显示了铀有某种富集可能;4.铀在花岗岩中地球化学行为,表现有二个富集高峰,既有在结晶早期富集在各类副矿物中的早富集特征,也有随花岗岩形成和演化富集在晚期的晚富集特征。二个富集途径,即随Si、K增高和随Si、Na增高途径。
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| 关 键 词： | 丰度 亲和性 分布型式 相关特征 地球化学行为 |
THE GEOCHEMICAL CHARACTERISTICS OF U AND Th IN THE GRANITOID ROCKS OF ZHUGUANG-TAOSHAN COMPLEX PLUTON |
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| Yu Dagan Wang Min.THE GEOCHEMICAL CHARACTERISTICS OF U AND Th IN THE GRANITOID ROCKS OF ZHUGUANG-TAOSHAN COMPLEX PLUTON[J].Journal of East China Geological Institute,1988(4). |
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| Authors: | Yu Dagan Wang Min |
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| Institution: | Yu Dagan Wang Min |
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| Abstract: | As the result of the deepening study of Zhuguang-Taoshan complex pluton, we realize that U and Th, which is contained within the local granite, have the geochemical charac t e r ist ics and behaviors as follows.1.The abundance of U, Th in the complex pluton increases in step with that in the motamorphics of outer contact zone of complex pluton.2.U has closer relations with K, Na and Si.While K Or Na is increasing U also is increasing.On the other hand, Th has closer relations with TiO_2, Fe O, MnO.3.The distribution pattern in the granite of Th is normal distribution, it of U is normal distribution or logarthmic normal distribution.The coefficient of variation of U is slight higher than it of Th.And the all indicate that the concentration of U in the granite is possible.4.The geochemical behaviours of U in the granite: The first, U has two concentration climaxes.One is that U is concentrated in various auxiliary minerals in early cristallization stage of the granite, another is that U is concentrated in later cristallization stage of the granite while the formation and evolution of the granite.The second, U has two concentration ways, however are that U is increasing while Si,K are increasing and Si, Na are increasing. |
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| Keywords: | abundance affinity distribution pattern correlation characteristic geochemical behaviours |
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