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通过对云南富源某红土型钛矿石进行系统采样、室内显微镜下分析、化学分析、X射线衍射分析、扫描电镜配合能谱分析、电子探针分析及ICP-MS分析等,研究了钛矿石矿物组成、矿石类型(初步划分为锐钛矿矿石和含锐钛矿的赤铁矿矿石),矿石中TiO2含量为3.65%~5.22%。两类矿石样品稀土元素特征值和稀土元素分配模式的研究表明,LREE/HREE为2.88和3.68,(La/Yb)N为5.54和10.03,均表现轻稀土的富集,同时元素Y富集;δCe值为0.85×10-6和0.93×10-6,显示负异常;δEu值为0.97×10-6和1.07×10-6,仅显示很微弱的异常。两类矿石样品微量元素分布特征具同源性。通过研究钛矿石样品的稀土元素与微量元素的地球化学特征,对比钛矿石形成过程中稀土元素的渊源性,得出峨眉山玄武岩为钛矿石矿化提供物质来源的结论。
Through the systematic sampling, indoor microscopic analysis, chemical analysis, X-ray diffraction analysis, scanning electron microscopy and energy spectrum analysis, electron probe analysis and ICP-MS analysis of a certain laterite-type titanium ore from Fuyuan, Yunnan Province, , Ore types (initially divided into anatase ore and anatase-containing hematite ore), and the content of TiO2 in the ore is 3.65% -5.22%. The results show that LREE / HREE is 2.88 and 3.68, (La / Yb) N is 5.54 and 10.03, both of which show the enrichment of light rare earth and the enrichment of element Y. The δCe values were 0.85 × 10-6 and 0.93 × 10-6, showing negative anomalies; the δEu values were 0.97 × 10-6 and 1.07 × 10-6, showing only very weak anomalies. Trace elements distribution characteristics of two types of ore samples have homology. By studying the geochemical characteristics of rare earth elements and trace elements in titanium ore samples and comparing the origin of rare earth elements during the formation of titanium ore, it is concluded that the Emei Mountain basalts provide the material source for titanium ore mineralization.