Experimental research of partition coefficient of V between magnetite, ilmenite and liquid

V在磁铁矿、钛铁矿与液体之间分配系数的实验研究

• 批准号: 60540513
• 负责人: FUJIMAKI Hirokazu
• 金额: $ 1.41万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60540513/
• 关键词: Magnetite; Ilmenite; Geothermometer; 酸素分圧計

The valence state of V in silicate melt should be <2^+> , <3^+> , or <4^+> and this is solely dependent of oxygen fugacity in the melt. Therefore, it is possible to use the partition coefficient of V between magnetite, ilmenite, and melt to extimate the temperature of the melt as well as oxygen fugacity. In this project, the partition coefficient of V between magnetite, ilmenite, and melt has been determined experimentarily. The system used was FeO- <V_2> <O_3> - <SiO_2> (+ <TiO_2> ) and the partition coefficient was expressed in a function of temperature and oxygen fugacity. However, the effect from the bulk chemical composition has been so serious that the obtained function can be applied to the special kind of rocks occurring in nature; they are dacitic to rhyolitic rocks of tholeiitic and calc-alkaline rock series. The system including ilmenite might be useless to apply the functionalized partition coefficient because the natural ilmenite contain high <TiO_2> but almost no <V_2> <O_3> The effect from bulk chemical composition and exact estimation of the valence of V in melt should be urgently obtained to overcome the remaining problems.

硅酸盐熔体中V的价态应为<2^+>、<3^+>或<4^+>，这仅取决于熔体中的氧逸度。因此，可以用钒在磁铁矿、钛铁矿和熔体之间的分配系数来估算熔体的温度和氧逸度。本课题通过实验测定了钒在磁铁矿、钛铁矿和熔体之间的分配系数。所用体系为FeO<V_2><O_3>-<SiO_2>（+<TiO_2>），分配系数用温度和氧逸度的函数表示。然而，从整体化学成分的影响已经如此严重，所获得的功能可以应用到特殊类型的岩石发生在自然界中，他们是拉斑玄武岩和钙碱性岩石系列的英安岩流纹质岩石。由于天然钛铁矿中V的含量很高但几乎不含，因此包含钛铁矿的体系可能无法应用功能化分配系数<TiO_2><V_2>。<O_3>迫切需要获得体相化学组成的影响以及熔体中V价态的准确估计，以克服剩余问题。

项目成果

Hirokazu Fujimaki: LITHOS. 19. 129-140 (1986)

藤卷宏和：LITHOS。

Hirokazu Fujimaki: "Petrology of Hayachine ultramafic complex in contact aureole, NE Japan (II) metamorphism and origin of the complex" Jornal of Japanese Association of Mineralogists, Petrologists and Economic Geologists. 81. 59-66 (1986)

Hirokazu Fujimaki：“接触光环中 Hayachine 超镁铁质杂岩的岩石学、日本东北部 (II) 变质作用和杂岩的起源”日本矿物学家、岩石学家和经济地质学家协会杂志。

Hirokazu Fujimaki: Journal of Japanese Association of Mineralogists,Petrologists and Economic Geologists. 81. 59-66 (1986)

Hirokazu Fujimaki：日本矿物学家、岩石学家和经济地质学家协会杂志。

Hirokazu Fujimaki: Journal of Japanese Association of Mineralogists,Petrogists and Economic Geologists. 81. 1-11 (1986)

Hirokazu Fujimaki：日本矿物学家、岩石学家和经济地质学家协会杂志。

Hirokazu Fujimaki: "Petrology of Hayachine ultramafic complex in contact aureole, NE Japan (I) primary and metamorphic minerals" Jornal of Japanese Association of Mineralogists, Petrologists and Economic Geologists. 81. 1-11 (1986)

Hirokazu Fujimaki：“日本东北部接触光环中 Hayachine 超镁铁质杂岩的岩石学 (I) 原生和变质矿物”日本矿物学家、岩石学家和经济地质学家协会杂志。