Geological Characteristics and Occurrence of Vanadium in the Mujiahe Vanadium Deposit in Shangnan County, Shaanxi
详细信息
- 责任者：Li Saisai (Guangxi Scientific Experiment Center of Mining Metallurgy and Environment ; Guilin University of Technology ; Guilin 541004 ; China) ; Wei Gangfeng
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(4)
- 关键词：钒矿 ; vanadium ores ; 赋存形式 ; presence modes ; 陕西 ; Shaanxi Province
- 页码：p.609-619
- 图表：illus., 5 tables, 20 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
The Mujiahe vanadium deposit occurs in the first member of the lower Cambrian Shuigoukou Formation of southern Qinling Mountains. The ore-hosted rocks are silicalite rocks intercalated with Carbargillite, a black rock series. The vanadium ore bodies are controlled by the strata, occurring in stratified and stratiform-like forms, and extending stably along the strike and dip. Through the phase analysis, X-ray diffraction and electron microprobe analysis, we found three vanadium-containing minerals: roscoelite, V-Fe oxide, V-Ti oxide aggregation. ① Roscoelite. Its typomorphic mineral is 2M1, and its chemical formula is K(Al,V)2(Si,Al)4O10(OH)2 or (K,Ba,Na)0.75 (Al,Mg,Cr,V)2 (Si,Al,V)4 O10 (OH,O)2. It is flake, ribbon, contains vanadium to a maximum of 22.68%. The vanadium occurrence is mainly the same phase in the mica. ② V-Fe oxide. Its chemical composition mainly includes V, Fe, O, and a little Ti, Mg, whose particle diameter is less than 10μm. It displays strawberry-shaped, round-shaped, star-shaped or ring structures, and contains vanadium to a maximum of 10.09% without water. It is the colloid of FeO-V2O3. ③ V-Ti oxide aggregation disseminates in the matrix of rock by dissemination and scattered specks. It initially deposited by colloid in the late stage of diagenesis and geological evolution process, in which the titanium oxide crystallized into anatase and brookite.
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