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探讨康滇地轴中段牟定1101地区铀成矿环境
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摘要
牟定1101地区铀矿化赋存于硅化、赤铁矿化斜长角闪片麻岩、黑云斜长石英片麻岩中,与水桥寺—上村—碗厂断裂带更次一级断裂以及构造裂隙发育密切相关。矿化地段白云母花岗岩和长英质脉体稀土元素有类似A型花岗岩的地球化学特征,显示其铀源可能来自类似A型花岗岩活动,与Rodinia超大陆裂解的时限相耦合,属造山带内后造山环境,与大陆边缘陆壳伸展作用或与陆内剪切作用产生的拉张环境有关。
Mouding 1101 region uranium mineralization occurs in silicification,hematitization plagioclase flash gneiss,biotite plagioclase quartz gneiss,and Water Temple Bridge-Village Bowl Factory fault with more time level faults and structural fissures is closely related to the development and mineralization of muscovite granite and felsic veins of rare earth elements have geochemical characteristics similar to A-type granite,showing the uranium source may from similar to A-type granite activities.The Rodinia supercontinent breakup time phase coupling,which belongs to the orogenic belt in the post orogenic environment,and continental margin and continental crust extension or with intracontinental shear action of extensional environment.
引文
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