Temperature and System Composition Effects on the Partitioning of V between Clinopyroxene and Silicate Melt and its Application

被引：0
|
作者：
Ruan M. [1 ,2 ,3 ]
Xiong X. [1 ,2 ]
Wang J. [1 ,2 ]
机构：
[1] State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangdong, Guangzhou
[2] CAS Center for Excellence in Deep Earth Science, Guangdong, Guangzhou
[3] University of Chinese Academy of Sciences, Beijing
来源：
Geotectonica et Metallogenia | 2022年 / 46卷 / 05期
关键词：
clinopyroxene; oxygen fugacity; partition coefficient of vanadium; system composition; temperature;
D O I：
10.16539/j.ddgzyckx.2022.05.010
中图分类号：
学科分类号：
摘要：
Vanadium (V), a common multivalent element, is present in minerals mainly at valences +2, +3, +4, and +5. Its partitioning behavior between minerals and melts is mainly controlled by oxygen fugacity. In clinopyroxene, V mainly exists as V2+ and V3+, replacing Fe2+, Mg2+, Al3+, and Fe3+ by isomorphism substitution. In recent years, the dependence of vanadium partitioning behavior on oxygen fugacity has often been used to explore the redox state of the mantle. In this study, the distribution behavior of V between clinopyroxene and melt was explored using a piston cylinder device with Ni-NiO and HM (hematite-magnetite) oxygen fugacity buffer to control the oxygen fugacity of the experimental system. The experimental pressure was 0.5 GPa and temperatures were 1000 ℃ and 1100 ℃. In this experiment, the oxygen fugacity was >FMQ, therefore, V mainly existed in the form of V3+ in clinopyroxene. The previous data and the results of this experiment showed that the distribution of V in clinopyroxene is affected by oxygen fugacity, temperature, and system composition. As the oxygen fugacity increases, the valence state of V changes, resulting in a change from compatible to incompatible in clinopyroxene. As the temperature and the distribution coefficient of Al between minerals and melts increase, the partition coefficient of V between clinopyroxene and the melt decreases. The formula logDCpx/MeltV =−4.19(±0.33)+0.94(±0.15)×DAl+5730(±480)/T−0.24(±0.01)×ΔFMQ (n=71, R2=0.92), obtained by multiple linear regression, can be used to estimate the oxygen fugacity of natural samples that contain clinopyroxene. © 2022 Science Press. All rights reserved.
引用
收藏
页码：1046 / 1055
页数：9
相关论文
共 36 条
  • [1] pp. 514-526
  • [2] Canil D., Vanadium partitioning and the oxidation state of Archaean komatiite magmas, Nature, 389, 6653, pp. 842-845, (1997)
  • [3] Canil D., Vanadium partitioning between orthopyroxene, spinel and silicate melt and the redox states of mantle source regions for primary magmas, Geochimica et Cosmochimica Acta, 63, 3, pp. 557-572, (1999)
  • [4] Canil D, Fedortchouk Y., Clinopyroxene-liquid partitioning for vanadium and the oxygen fugacity during formation of cratonic and oceanic mantle lithosphere, Journal of Geophysical Research: Solid Earth, 105, B11, pp. 26003-26016, (2000)
  • [5] Canil D, Fedortchouk Y., Olivine-liquid partitioning of vanadium and other trace elements, with applications to modern and ancient picrites, The Canadian Mineralogist, 39, 2, pp. 319-330, (2001)
  • [6] Chou I M., Calibration of oxygen buffers at elevated P and T using the hydrogen fugacity sensor, American Mineralogist, 63, 7–8, pp. 690-703, (1987)
  • [7] Davis F A, Humayun M, Hirschmann M M, Cooper R S., Experimentally determined mineral/melt partitioning of first-row transition elements (FRTE) during partial melting of peridotite at 3 GPa, Geochimica et Cosmochimica Acta, 104, 3, pp. 232-260, (2013)
  • [8] Foley S F., A reappraisal of redox melting in the earth’s mantle as a function of tectonic setting and time, Journal of Petrology, 52, 7–8, pp. 1363-1391, (2011)
  • [9] Freda C, Baker D R, Ottolini L., Reduction of water loss from gold-palladium capsules during piston-cylinder experiments by use of pyrophyllite powder, American Mineralogist, 86, 3, pp. 234-237, (2001)
  • [10] Frost B R., Introduction to oxygen fugacity and its petrologic importance, Reviews in Mineralogy and Geochemistry, 25, 1, pp. 1-9, (1991)
1234