| 苏州高岭土矿成矿期后的矿物演化及其与矿体改造的关系 |
| |
| 引用本文： | 周国平.苏州高岭土矿成矿期后的矿物演化及其与矿体改造的关系[J].岩石矿物学杂志,1988,7(2):158-166. |
| |
| 作者姓名： | 周国平 |
| |
| 作者单位： | 中国地质科学院矿床地质研究所 |
| |
| 摘 要： | 苏州高岭土矿主要由高岭石、7埃洛石、10埃洛石及少量绢云母、蒙脱石、明矾石、三水铝石组成。高岭土矿物形成后因外界地化条件改变发生了以下转变:(1)埃洛石脱水向高岭石转化;(2)次生淋滤埃洛石形成;(3)埃洛石和三水铝石之间的互相转化;(4)Ca型蒙脱石形成;(5)高岭土的磷酸盐化作用;(6)次生淋滤明矾石的形成。矿物生成的先后顺序和共生关系可将矿物形成分为主要成矿期和成矿期后演化两个阶段。矿物的后期演化使优质高岭土进一步富集,改造,形成量大质优的高岭土矿。同时,非高岭土矿物的生成又使部分矿石质量变差,降低了矿石的工业价值。
|
| 关 键 词： | 高岭土矿物 演化 改造 富集 苏州 |
The Relationship between the post-ore Mineral Evolution of Kaolin Deposits in Suzhou and the Transformation of Orebodies |
| |
| Zhou Guoping.The Relationship between the post-ore Mineral Evolution of Kaolin Deposits in Suzhou and the Transformation of Orebodies[J].Acta Petrologica Et Mineralogica,1988,7(2):158-166. |
| |
| Authors: | Zhou Guoping |
| |
| Abstract: | The kaolin deposits in Suzhou consist mainly of kaolinite, 7 halloysite and 10 halloysite, with less sericite and montmorillonite and varying amounts of alunite, gibbsite and phosphate minerals in company. On the whole, kaolinite and 7 halloysite are dominant in the upper part of the orebody and 10 halloysite in the middle and lower parts.Montmorillonite, gibbsite and secondary leaching type alunite are frequently seen near the bottom, together with localized phosphate minerals. The chemical compositions of kaolin minerals are approximately equal to theoretical values and SiO_2/Al_2O_3 ratio of the major ore is close to 2.These mineral associations are products of different geological processes in different periods. After their formation, the kaolin minerals are only in temporary equilibrium with the surrounding environment and are thus in a relatively stable structural state. With the variation in surrounding geochemical environment, these minerals will change their stable structures gradually into unstable structures to reach new equilibrium. The conversion mainly includes (1)the transformation of halloysite into kaolinite, (2)the formation of secondary leaching type 10 halloysite, (3)the mutual conversion between halloysite and gibbsite and (4)the formation of Ca-montmorillonite. Based on the above discussion, the author has established a formation and evolution sequence for kaolin deposits and dealt tentatively with the relationship between the mineral evolution and the transformation of orebodies. |
| |
| Keywords: | Kaolin mineral evolution transformation enrichment Suzhou |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 |
|
