| 华南富氟花岗岩高磷和低磷亚类型对比 |
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| 引用本文： | 黄小龙,王汝成.华南富氟花岗岩高磷和低磷亚类型对比[J].地质论评,1998,44(6):607-617. |
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| 作者姓名： | 黄小龙 王汝成 |
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| 作者单位： | 南京大学地球科学系，成矿作用国家重点实验室，南京大学地球科学系，成矿作用国家重点实验室，南京大学地球科学系，成矿作用国家重点实验室，南京大学地球科学系，成矿作用国家重点实验室，南京大学地球科学系，成矿作用国家重点实验室 210093，210093，210093，210093，210093 |
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| 基金项目： | 国家自然科学基金(编号49673183,49632080) |
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| 摘 要： | 根据全岩Ｐ２Ｏ５含量的多寡可将华南富氧花岗岩分为高磷亚类和低磷亚类，它们之间具较大的地球化学差异。高磷亚类以低硅、强过铝和低的ＲＥＥ总量为特征，而低磷亚类则相反。在长石、云母等矿物化学成分上这两亚类花岗岩也有所差异。高磷亚类花岗岩中磷以长石中结构磷和磷铝锂石形式存在，而低磷亚类花夺中的磷则主要存在于磷灰石等磷酸盐矿物中。
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| 关 键 词： | 富氟花岗岩 高磷亚类型 低磷亚类型 华南 花岗岩 |
Contrast Between the High-P Subtype and Low-P Subtype of F-Rich Granites in South China |
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| Huang Xiaolong,Wang Rucheng,Chen Xiaoming,Chen Peirong and Liu Changshi.Contrast Between the High-P Subtype and Low-P Subtype of F-Rich Granites in South China[J].Geological Review,1998,44(6):607-617. |
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| Authors: | Huang Xiaolong Wang Rucheng Chen Xiaoming Chen Peirong and Liu Changshi |
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| Abstract: | F-rich granites in South China may be divided into the high-P subtype and low-P subtype according to their whole-rock P2O5 contents. There are obvious differences in chemical compositions of these two subtypes. The high-P subtype is strongly peraluminous and characterized by low-silica, very low REE contents and higher A/NKC and Na/K values, while the low-P subtype is weakly peraluminous and characterized by high-silica, very high REE contents and high CaO and Mg+Fe values. There are also some differences in their mineralization. High-P subtype granites are mainly related to Nb and Ta mineralization, while low-P subtype granites are mainly related to Sn, W and Be mineralization. The micas of high-P subtype granites are richer in Li, while those of low-P subtype granites are richer in Fe. The phosphorus of high-P subtype mainly appears in the feldspar structure as PAlSi_2 or subordinately in the amblygonite as an accessory mineral,and the P2O5 contents in the feldspars are high. On the contrary,the P2O5 contents in the feldspars of low-P subtype granites are very low (<0. 01% , whithin the detection limit of micro-probe analysis) ,and phosphorus is mainly hosted in trace amounts of phosphate minerals. |
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| Keywords: | F-rich granites high-P subtype low-P subtype South China |
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