| 8411地区深熔作用的Sr,Nd同位素地质研究 |
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| 引用本文： | 营俊龙.8411地区深熔作用的Sr,Nd同位素地质研究[J].铀矿地质,1993(3). |
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| 作者姓名： | 营俊龙 |
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| 作者单位： | 核工业北京地质研究院 100029 |
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| 摘 要： | 8411地区深熔作用的同位素地质研究表明,J_(1-2)砂岩是以元古代古陆壳供源的湖相沉积岩、岩浆岩为元古代古陆在下地壳局部重熔或重熔-混染的产物。铀的预富集与深熔作用中硅铝质地壳岩浆混染有关。铀矿物和岩浆岩的同位素组成相似。这些研究结果,结合岩石学、矿物学、同位素演化和稀土含量分析,认识到铀来自深源,元古代地层是铀源层。
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| 关 键 词： | 深熔 同位素地质 重熔 |
A STUDY OF Sr AND Nd ISOTOPIC GEOLOGY DURING ANATEXIS IN THE AREA NO. 8411 |
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| Ying Junlong.A STUDY OF Sr AND Nd ISOTOPIC GEOLOGY DURING ANATEXIS IN THE AREA NO. 8411[J].Uranium Geology,1993(3). |
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| Authors: | Ying Junlong |
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| Abstract: | An isotopic geology study in the area No.8411 indicates that the J_(1-2) sandstone is lacustrine facies sediments mainly originated from Proterozoic old continental crust. Therefore, the magrnatic rocks arc derived from partial melting or remelting-contamination of Proterozoic old continents in the lower crust. The initial concenerration of uranium is related with the magma contamination caused byanatexis in the old sialic crust. The isotopic compositions of both uranium minerals and magmatic rocks are relatively concordant. According to the results of this study, combined with petrology, mineralogy. isotopic evolution and REE contents, it is considered that uranium is derived from the deep source and uranium source rocks are Proterozoic old continents. |
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| Keywords: | Anatexis Isotopic geology Partial melting |
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