| 湘南香花铺云英伟晶岩研探 |
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| 引用本文： | 沈敢富.湘南香花铺云英伟晶岩研探[J].地质论评,1994,40(4):296-306. |
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| 作者姓名： | 沈敢富 |
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| 作者单位： | 中国地质科学院成都地质矿产研究所 |
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| 摘 要： | 湘南香花铺地区产出一类具伟晶结构的云英岩,它们发育有一系列宏观,微观地质特征,充分表明其主要为岩浆结晶作用的直接产物,在已知的岩浆岩及其蚀变岩石中,尚无与之相同或相似的岩性,因此,它们实属一类新发现的火成岩,即云英伟晶岩,本文简要论述产出于香花铺地区云英伟晶岩的地质,地球化学特征;提出了云英传晶岩的分类方案;结合有关成岩实验资料,探了这类岩石的成生机制。
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| 关 键 词： | 云英岩 伟晶结构 地质特征 |
STUDY OF GRE1SEN-PEGMAT1TE IN THE X1ANGHUAPU DISTRICT, HUNAN |
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| Sher. Ganfu.STUDY OF GRE1SEN-PEGMAT1TE IN THE X1ANGHUAPU DISTRICT, HUNAN[J].Geological Review,1994,40(4):296-306. |
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| Authors: | Sher Ganfu |
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| Abstract: | Some greisen bodies occurring in the Xianghuapu district, Linwu County, Hunan Province, are characterized by pegmatitic texture, horizontal zonation, inhomogeneity in texture, structure and mineral assemblage, presence of melt inclusions in topaz and quartz, and enrichment in F, HaO, Li, Rb and K and depletion in Na. According to the occurrence, .textures and structures and fluid-inclusion data for these greisen bodies, the author thinks that they directly crystallized from F, H^O, Li, Rb and K-rich and Na-poor greisenic magma ("esuiite magma") under closed conditions. This conclusion has strongly been supported by the data of experimental petrology of the system granite-H2O-RF (R = Li, Na, K, Rb, Cs and H+). There is no rock similar to these greisen bodies in the known igneous rocks and their altered rocks; therefore they might be regarded as a new type of. magmatic greisen, and named greisen-pegmatite by the author according to their mineral assemblage, texture, structure and origin. The paper introduces briefly the geological and geochemical features of these greisen-pegmatite bodies, makes a suggestion on classification and nomenclature of greisen-pegmatite, and discusses their lithogenetic mechanism. |
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| Keywords: | greisen pegmatitic texture new type of igneous rocks (greisen-pegmatite) classification and nomenclature petrogenetic mechanism |
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