地质与勘探2012，Vol.48Issue(3)：508-517,10.
滇东南上二叠统吴家坪阶下部铝土矿地球化学特征及物源分析
Geochemical Characteristics and Material Source of Bauxite Ores from the lower Wuchiapingian of Upper Permian in Southeastern Yunnan Province
摘要
Abstract
The bauxite deposit in southeastern Yunnan province overlies unconformably on either Emeishan basalts or carboniferous limestones. It makes sense to clarify the material souree of bauxite ores for its exploration and development. The geochemical characteristics of the bauxite ores,granite, basahs and limestone were studied in detail. Geochemical analyses indicate that the main components in the ores are A1203 , Fe203 , SiO2 and TiO2 and other elements oceur in quantities not substantial to affect the quality or processing of the bauxite. Trace elements like Zr, Hf, Nb, and Ta were obviously enriched during the bauxitization. Furthermore,elements such as Zr, Hf, Nb and Ta exhibit signifieant eorrelation with each other. Chondrite-normalized REE patterns of the bauxite indicates that bauxites are similar to Emeishan basalts,but are different from the underlying limestone. Besides,bauxites have the similar primitive-mantle-normalized pattern and upper-continental-ernst-normalized pattern of trace elements as Emeishan basahs,but show distinct patterns from limestone. Simultaneously, geochemical indiees such as Zr/Hf and Nb/Ta denote that the magmatic rocks related to the Emeishan basalts pro- vided the main sources of material for the bauxite ores.关键词
滇东南/吴家坪阶下部/铝土矿/地球化学/物源分析Key words
SE Yunnan/Lower Wuehiapingian/Bauxite ores/Geochemical Characteristics/Provenance分类
天文与地球科学引用本文复制引用
刘加强,王训练,周洪瑞,高金汉,于蕾,郑楠,毛志芳..滇东南上二叠统吴家坪阶下部铝土矿地球化学特征及物源分析[J].地质与勘探,2012,48(3):508-517,10.基金项目
中国地质调查局项目（基[2011]01-47-09）资助 （）
