摘要
本文通过对蚀变岩石的岩石学、蚀变矿物、岩石化学、微量元素、稀土元素、氧、硫同位素的研究,系统阐述了201富铀矿床的围岩蚀变地球化学特征,探讨了成矿环境和成矿溶液的来源以及蚀变过程中的水-岩交换等问题。提出了广泛发育的水云母化、绿泥石化,高钾、低^(18)O蚀变岩,蚀变带的Cu,Mo,As,S等大量增加、δ^(18)O值和稀土总量减少是直接的找矿标志。
In this paper the geochemical characteristics of hydrothermal alteration zone in rich ura-nium deposit No.201 are systematically described through the study of lithology, alteredminerals, petrochemistry trace and rare earth elements, oxygen and sulphur isotopic com-positions of the altered granite. Source of the ore-forming solution, environment of the oreformation and material exchange between water and rocks in the process of alteration arediscussed. It is suggested that extensively developed hydromicazation and chloritization, highK_2O content and lower ^(l8)O of altered granite, increase of Cu, Mo, As, S elements anddecrease of δ^(18)O value and rare earth elements in the alteration zone are direct guide forprospecting uranium mineralization.
出处
《铀矿地质》
CSCD
北大核心
1990年第6期359-368,共10页
Uranium Geology
关键词
铀矿
富矿
矿床
蚀变
地球化学
Rich uranium deposit
Wall-rock alteration geochemistry
Guide for prospecting
