Experiments on the element partitioning between olivine and aqueous chloride solution under supercritical conditions

Chiyoko Takahashi, Etsuo Uchida

    Research output: Contribution to journalArticle

    Abstract

    Experiments on the partitioning of Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+ and Zn2+ between olivine (forsterite and fayalite) and 2N aqueous chloride solutions were performed in the temperature range of 500 to 800°C, 1 kb. The partition coefficient, which is defined as Kpn(Fo)=(XMe2sio4,/XMg2sio4)/(mMeCl°2aq/mMgCl°2q) or KPN(Fa)=(XmesiO4/XfesiO4)/(mMeCl°2aq/mFeCl°2aq), vs. ionic radius (PC-IR) diagrams are drawn based on the experimental results. In the case of forsterite, the PC-IR curve has a local maximum near Ni2+ and shows a concave curve in the region of larger ionic size. However Zn2+ deviates from such a trend. In the case of fayalite, the PC-IR curve shows a convex curve with a peak near Ni2+ except for 500°C. Also in this case, Zn2+ deviates from such a trend. The anomaly of Zn2+ may be attributable to its tetrahedral site preferency. The K pn value for Ni2+ decreases with increasing temperature, whereas those for the other elements except for Ca2+ increase. The optimum ionic radius for forsterite and fayalite seem to increase slightly with increasing temperature.

    Original languageEnglish
    Pages (from-to)85-96
    Number of pages12
    JournalJapanese Magazine of Mineralogical and Petrological Sciences
    Volume29
    Issue number3
    DOIs
    Publication statusPublished - 2000

    Fingerprint

    fayalite
    forsterite
    Chlorides
    olivine
    partitioning
    chloride
    experiment
    temperature
    Experiments
    partition coefficient
    Temperature
    diagram
    anomaly
    trend

    Keywords

    • Aqueous chloride solution
    • Fayalite
    • Forsterite
    • Olivine
    • Partition coefficient
    • Supercritical condition

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Economic Geology

    Cite this

    @article{fc2fcecf8a3b4cceb48d82c93c0f3c87,
    title = "Experiments on the element partitioning between olivine and aqueous chloride solution under supercritical conditions",
    abstract = "Experiments on the partitioning of Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+ and Zn2+ between olivine (forsterite and fayalite) and 2N aqueous chloride solutions were performed in the temperature range of 500 to 800°C, 1 kb. The partition coefficient, which is defined as Kpn(Fo)=(XMe2sio4,/XMg2sio4)/(mMeCl°2aq/mMgCl°2q) or KPN(Fa)=(XmesiO4/XfesiO4)/(mMeCl°2aq/mFeCl°2aq), vs. ionic radius (PC-IR) diagrams are drawn based on the experimental results. In the case of forsterite, the PC-IR curve has a local maximum near Ni2+ and shows a concave curve in the region of larger ionic size. However Zn2+ deviates from such a trend. In the case of fayalite, the PC-IR curve shows a convex curve with a peak near Ni2+ except for 500°C. Also in this case, Zn2+ deviates from such a trend. The anomaly of Zn2+ may be attributable to its tetrahedral site preferency. The K pn value for Ni2+ decreases with increasing temperature, whereas those for the other elements except for Ca2+ increase. The optimum ionic radius for forsterite and fayalite seem to increase slightly with increasing temperature.",
    keywords = "Aqueous chloride solution, Fayalite, Forsterite, Olivine, Partition coefficient, Supercritical condition",
    author = "Chiyoko Takahashi and Etsuo Uchida",
    year = "2000",
    doi = "10.2465/gkk.29.85",
    language = "English",
    volume = "29",
    pages = "85--96",
    journal = "Japanese Magazine of Mineralogical and Petrological Sciences",
    issn = "1349-7979",
    publisher = "Nihon Koubutsu Gakkai",
    number = "3",

    }

    TY - JOUR

    T1 - Experiments on the element partitioning between olivine and aqueous chloride solution under supercritical conditions

    AU - Takahashi, Chiyoko

    AU - Uchida, Etsuo

    PY - 2000

    Y1 - 2000

    N2 - Experiments on the partitioning of Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+ and Zn2+ between olivine (forsterite and fayalite) and 2N aqueous chloride solutions were performed in the temperature range of 500 to 800°C, 1 kb. The partition coefficient, which is defined as Kpn(Fo)=(XMe2sio4,/XMg2sio4)/(mMeCl°2aq/mMgCl°2q) or KPN(Fa)=(XmesiO4/XfesiO4)/(mMeCl°2aq/mFeCl°2aq), vs. ionic radius (PC-IR) diagrams are drawn based on the experimental results. In the case of forsterite, the PC-IR curve has a local maximum near Ni2+ and shows a concave curve in the region of larger ionic size. However Zn2+ deviates from such a trend. In the case of fayalite, the PC-IR curve shows a convex curve with a peak near Ni2+ except for 500°C. Also in this case, Zn2+ deviates from such a trend. The anomaly of Zn2+ may be attributable to its tetrahedral site preferency. The K pn value for Ni2+ decreases with increasing temperature, whereas those for the other elements except for Ca2+ increase. The optimum ionic radius for forsterite and fayalite seem to increase slightly with increasing temperature.

    AB - Experiments on the partitioning of Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+ and Zn2+ between olivine (forsterite and fayalite) and 2N aqueous chloride solutions were performed in the temperature range of 500 to 800°C, 1 kb. The partition coefficient, which is defined as Kpn(Fo)=(XMe2sio4,/XMg2sio4)/(mMeCl°2aq/mMgCl°2q) or KPN(Fa)=(XmesiO4/XfesiO4)/(mMeCl°2aq/mFeCl°2aq), vs. ionic radius (PC-IR) diagrams are drawn based on the experimental results. In the case of forsterite, the PC-IR curve has a local maximum near Ni2+ and shows a concave curve in the region of larger ionic size. However Zn2+ deviates from such a trend. In the case of fayalite, the PC-IR curve shows a convex curve with a peak near Ni2+ except for 500°C. Also in this case, Zn2+ deviates from such a trend. The anomaly of Zn2+ may be attributable to its tetrahedral site preferency. The K pn value for Ni2+ decreases with increasing temperature, whereas those for the other elements except for Ca2+ increase. The optimum ionic radius for forsterite and fayalite seem to increase slightly with increasing temperature.

    KW - Aqueous chloride solution

    KW - Fayalite

    KW - Forsterite

    KW - Olivine

    KW - Partition coefficient

    KW - Supercritical condition

    UR - http://www.scopus.com/inward/record.url?scp=85024741962&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85024741962&partnerID=8YFLogxK

    U2 - 10.2465/gkk.29.85

    DO - 10.2465/gkk.29.85

    M3 - Article

    AN - SCOPUS:85024741962

    VL - 29

    SP - 85

    EP - 96

    JO - Japanese Magazine of Mineralogical and Petrological Sciences

    JF - Japanese Magazine of Mineralogical and Petrological Sciences

    SN - 1349-7979

    IS - 3

    ER -