本文選題：鈾礦床 + 綠泥石　； 參考：《礦物學(xué)報》2017年06期

【摘要】：綠泥石化是華南熱液鈾礦床重要的蝕變類型之一。本文通過對南嶺中段黃沙礦區(qū)223鈾礦床綠泥石的巖相學(xué)和電子探針成分分析,區(qū)分出4種產(chǎn)出狀態(tài)的綠泥石,識別了綠泥石的化學(xué)成分類型,計算了綠泥石的形成溫度、n(Mg)/n(Fe+Mg)等相關(guān)指數(shù),討論了綠泥石形成機制環(huán)境及其與鈾成礦的關(guān)系。研究表明223鈾礦床綠泥石主要分為黑云母蝕變型、長石蝕變型、裂隙充填型和鈾礦共生型4種產(chǎn)出類型,為富鐵的蠕綠泥石,形成于還原環(huán)境,形成溫度為200~282℃,屬于中溫?zé)嵋何g變;綠泥石的形成機制主要有溶蝕-沉淀結(jié)晶和溶蝕-遷移-沉淀結(jié)晶2種方式。綠泥石化改變了巖石物理-力學(xué)性質(zhì)、原巖中鈾的賦存狀態(tài),提供了成礦熱液部分鈾源和有利于鈾富集成礦的地球化學(xué)環(huán)境。
[Abstract]:Green mud petrifaction is one of the important alteration types of hydrothermal uranium deposits in South China. Based on the analysis of lithofacies and electron probe composition of chlorite in Huangsha deposit 223 uranium deposit in the middle part of Nanling, four kinds of chlorite are distinguished, and the chemical composition types of chlorite are identified. The formation temperature of chlorite is calculated and the relationship between the formation mechanism of chlorite and uranium mineralization is discussed. The results show that the chlorite of No. 223 uranium deposit is mainly divided into biotite alteration type, feldspar alteration type, fissure filling type and uranium ore symbiotic type, which are iron-rich vermicular chlorite, formed in the reduction environment and formed at 200 ~ 282 鈩，

本文編號：1824892