摘要
四川石棉大水沟独立碲矿床堪称世界首例，其矿体两侧的围岩蚀变较窄，且蚀变带与矿脉及未蚀变岩呈清楚而截然的接触关系。主要围岩蚀变为白云石化、白（绢）云母化、云英岩化及电气石化等。这些蚀变作用分别发生于１７７．７～１６５．１Ｍａ和９１．７１～８０．１９Ｍａ。蚀变作用过程中ＳｉＯ２大量析出，Ａｌ２Ｏ３、ＴｉＯ２、ＣａＯ、ＭｇＯ、Ｋ２Ｏ、Ｈ２Ｏ、ＣＯ２、Ｆｅ２Ｏ３、ＭｎＯ则有不同程度地带入。与此同时，ＲＥＥ在此过程中包集体迁出，Ｔｅ、Ｂｉ、ＡＳ等元素的含量则决定于蚀变作用及其强度，而与原岩无关。
The altered zones next to the tellurium ore bodies in Dashuigou independent tellurium deposit in SichuanProvince, China, which is the first and the only independent tellurium ore deposit in the world, are very narrow. And clear and sudden contact exists between the altered rocks, the ore bodies and the unaltereed rocks.The main alterations are as follows: muscovitization, dolomitization, biotitization, sericitization, chloritization,tourmalinization, greisenization and so on. These alterations happened seperately in 177. 7-165. 1Ma and91. 71-80. 91 Ma. During the alteration, a lot of SiO2 gave out, but Al2O3, TiO2, CaO, MgO, K2O, H2O,CO2, Fe2O3 and MnO added sepaarately. Meanwhile, REE gave out together. The abundance of Te, Bi, Seand so on,is closely related with the strength of alteration,and has nothing to do with the original wall-rocks.
基金
国家博士后基金
地矿部定项基金
国家"八五"重点攻关项目
关键词
碲矿床
蚀变岩
地质学
地球化学
alteration, genochemistry, independent tellurium ore deposit
