摘要
笔者通过对巴丹吉林盆地西南缘沙枣泉地区进行综合地质调查、钻探评价和资料分析研究,总结了新民堡群铀矿化特征,分析了铀成矿控矿因素,认为该区铀矿化受构造、目的层层序界面、岩相岩性、后生氧化改造及蚀源区铀源条件等多方面因素控制。相对稳定且适度抬升的盆地构造背景有利于铀成矿,铀矿化集中区位于向斜构造中央凹陷地区。新民堡群第Ⅳ/Ⅲ层序界面是构造机制转化面、沉积体系转化面和地球化学环境转化面,具有重要的控矿意义。盆地内扇前缘亚相和扇中亚相是有利的岩性岩相。盆缘长期隆升的富铀海西期花岗岩体为铀成矿提供了优越的物源条件。
Based on the integration of previous research achievement, this paper discussed the Lower Cretaceous Xinmingpu Group and uranium minerlization in Shazaoquan area of Badanjilin basin with re- sults of field geological investigation as well as borehole verification. After analyzing the ore-contral fac- tors, the uranium mineralization was believed to be controlled by sequence stratigraphic boundary, litho- facies, epiginetic oxidation. The favorite minerlization area should have relative stable structure and prop- er structural lift condition in the centre depression of the basin. The boundary of sequence IV/HI of Xin- minpu Group with the change in structural and depositional system and geochemical condition is the most important ore-control factor. The foreside of alluvial fan and midland also afford favourite lithology combi- nation and space for uranium minerlization. Uranous granite afford the very beneficial uranium minerali- zing condition for the sandstone-type uranium deposits. In general, Badanjilin basin have a good prospec- tive.
出处
《铀矿地质》
CAS
CSCD
2013年第1期18-23,共6页
Uranium Geology
关键词
新民堡群
铀矿化特征
控矿因素
Xinminpu group
uranium minerlization characteristics
ore-controlling factors
