摘要
粤北石土岭铀矿床碱交代作用十分发育,矿区范围内围岩蚀变强烈,主要发育有白云母化、钾长石化、绿泥石化、绢云母化等蚀变类型。它们多呈面状展布,与铀成矿关系十分密切。本文根据含矿主岩、碱交代岩、辉绿岩与沥青铀矿在形成时间上的对比,以及碱交代岩的地球化学特征研究,认为石土岭铀矿床的碱交代作用主要是地幔流体沿深层次伸展构造上升过程中产生的交代作用形成的。
Alkali metasomatism occurs currently in Shituling uranium deposit, northern Guangdong province. The wall rock alterations of orefield are strong, which mainly include muscovitization, potash feldspar alteration, chloritization, and sericitization. The alterations distribute planarly, and are consistent with the uranium mineralization. Based on the contrasting of the formation time of ore hosted rock, alkali rock, diabase and uraninite, and study on the geochemical features of the alkali rock, The study present that alkali metasomatism in the Shituling uranium deposit is formed by the metasomatism of the mantle fluid through deep extensional tectonics.
出处
《地质论评》
CAS
CSCD
北大核心
2005年第5期557-565,共9页
Geological Review
基金
国家自然科学基金重点项目(编号40132010)创新群体项目(编号40221301)高等学校博士学科点专项基金项目(编号20040284039)的成果。
