现代地质Issue(4)：731-742,12.
云南文山县天生桥铝土矿地球化学特征与物源分析
Geochemical Characteristics and Provenance Analysis of the Tianshengqiao Bauxite in Wenshan County,Yunnan Province
摘要
Abstract
The Tianshengqiao bauxite deposit in Wenshan County,Yunnan is a typical sedimentary bauxite de-posit.The ore bodies occur in the Upper Permian Longtan Formation,which is underlain by the Upper Carboni-ferous limestones and the basalt related to the Emeishan LIP.The ore is dominated by pelitomorphic textures, with a few detrital textures and ooidic textures.These textural features suggest that the bauxitic soils were trans-ported over a short distance.Constant elements analysis reveals that Al2 O3 of bauxite has a negative relationship with Fe2 O3 and TiO2 .Trace elements such as Zr,Hf,Nb,Ta and Bi were enriched during the bauxitization process more than Li,Rb,Sr,Ba.Elements of Zr,Hf,Nb and Ta demonstrate significant correlation with TiO2 respectively.Studies of stable elements correlation such as Zr-Hf,Nb-Ta,bivariate plots of lgNi and lgCr, and REE pattern suggest that the basalt is the major source of materials for the bauxite formation.Meanwhile, the carbonate rocks may provide a small amount of source of materials for the formation of bauxite ores.关键词
铝土矿/地球化学/成矿物质来源/文山县/云南Key words
bauxite/geochemistry/ore-forming material source/Wenshan County/Yunnan分类
天文与地球科学引用本文复制引用
焦扬,王训练,崔银亮,姜永果,周洪瑞,高金汉,王根厚..云南文山县天生桥铝土矿地球化学特征与物源分析[J].现代地质,2014,(4):731-742,12.基金项目
中国地质调查局项目（20100610）。 （）
