| 白云鄂博花岗岩稀土配分型式的初步研究 |
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| 引用本文： | 王凯怡.白云鄂博花岗岩稀土配分型式的初步研究[J].地质科学,1980,15(1):83-86. |
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| 作者姓名： | 王凯怡 |
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| 摘 要： | 白云鄂博花岗岩的稀土配分型式 该花岗岩出露于白云鄂博矿的东部和东南部。侵入于白云鄂博群中,引起围岩不同程度和不同性质的蚀变。在地质构造位置上处于内蒙台背斜向内蒙褶皱带过渡的的中间地带,多沿东西方向分布,受断裂控制。
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A PRELIMINARY STUDY OF THE DISTRIBUTION PATTERN OF RARE EARTH ELEMENTS IN GRANITES OF BAYAN OBO, INNER MONGOLIA AUTONOMOUS REGION |
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| Wang Kaiyi.A PRELIMINARY STUDY OF THE DISTRIBUTION PATTERN OF RARE EARTH ELEMENTS IN GRANITES OF BAYAN OBO, INNER MONGOLIA AUTONOMOUS REGION[J].Chinese Journal of Geology,1980,15(1):83-86. |
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| Authors: | Wang Kaiyi |
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| Abstract: | Granitic rocks found in the Bayan Obo can be divided into three groups: medium-coarse biotite granite (Gr1), medium-coarse hornblende biotite granite (Gr2) and finegrained biotite granite (GrII). These granites may be attributed to the Hercynian period, whereas Gr1 and Gr2 have been intruded by the younger GrII. The REE content in these rocks varies in range from 224 ppm to 357 ppm and decreases with the ages of rocks. Moreover, the relationship between the total REE content and the major chemical composition of rocks can be traced.The granites are all similar in the distribution pattern of REE, but different in the country rocks, so that the degree of fractionation of REE is somewhat various. It can be explained by the various rock-forming minerals.As the Gr1 and Gr2 are occurred, the feldspar was extensively crystallized, hence Eu would be first of all incorporated into the feldspars. As a result Eu is relatively depleted in younger Grn and the Eu negative anomaly of limited extent may be emerged.From the foregoing statement it can be suggested that the three groups of granite are originated from a identical source. |
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