| 含方霜晶石的羟硅铝石-地开石粘土脉——一种新型的低温热液蚀变岩脉 |
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| 引用本文： | 孙世华,吴美清,林毅高.含方霜晶石的羟硅铝石-地开石粘土脉——一种新型的低温热液蚀变岩脉[J].地质科学,1987,0(4):348-357. |
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| 作者姓名： | 孙世华 吴美清 林毅高 |
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| 作者单位： | 1. 中国科学院地质研究所;2. 江西冶金地质勘探公司一队 |
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| 摘 要： | 铁锂云母钠长花岗岩中发现了新型的低温热液蚀变产物——含方霜晶石的羟硅铝石-地开石粘土脉。描述了粘土脉的地质背景、岩石学特征,以及方霜晶石、羟硅铝石的矿物学特征。讨论了这一发现的岩石学和矿物学的意义。
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| 关 键 词： | 方霜晶石 羟硅铝石 混层矿物 钠长花岗岩 热液蚀变 |
| 收稿时间： | 1986-05-01 |
| 修稿时间： | 1986-05-01; |
TOSUDITE-DICKITE CLAY VEIN BEARING THOMSENOLITE ——A NEW TYPE OF LOW TEMPERATURE HYDROTHERMAL ALTERED VEIN |
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| Sun Shihua Wu Meiqing.TOSUDITE-DICKITE CLAY VEIN BEARING THOMSENOLITE ——A NEW TYPE OF LOW TEMPERATURE HYDROTHERMAL ALTERED VEIN[J].Chinese Journal of Geology,1987,0(4):348-357. |
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| Authors: | Sun Shihua Wu Meiqing |
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| Institution: | 1. Institute of Geology, Academia Sinica, Beijing;2. Team NO. 1, Jiangxi Metallurgical Exploration Co. Hengfeng, Jianxi Province |
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| Abstract: | The tosudite-dickite vein containing thomsenolite is found along the fracture zone in zin-nwaldite-albite granite from Songshugang, Jiangxi Province, being the product of a new type of low-T hydrothermal alteration.The structure and texture of the clay vein are described. The chemical compositions of zinnwaldite-albite granite and clay vein and thomsenolite are also determined. The density and optical properties of thomsenolite are shown as well. There are other data of thpmseno-lite and clay mineral mixture, e.g. X-ray, infrared absorption, spectrometry, differential thermal analysis, thermogravimetry and electron micrographs.Coexistance of thomsenolite and tosudite implies that the formation temperature of thomsenolite is more than 360℃. Discovering this clay vein not only furnishes a new occurrence of thomsenolite, but also confirms that F still plays an important role even during the low-T hydrothermal alteration of zinnwaldite-albite granite. Besides, it shows that tosudite, the regular mixed layer mineral of dioctahedral chlorite and montmorillonite, can be formed in granite almost free of Fe and Mg as well as in acidic volcanic rocks. |
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| Keywords: | thomsenollite tosudite mixed layer mineral albite granite hydrothermal altera-tion |
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