### 抄録

In Lindsley's thermometry, a revised sequence of calculation of components is proposed for clinopyroxene, in which kosmochlor component is added. Temperatures obtained for the components calculated by the revised method are about 50 °C lower than those obtained for the components calculated by the Lindsley's original method and agree well with temperatures obtained from orthopyroxenes. Ca-partitioning between clino- and orthopyroxenes is then thought to be equilibrated in types 5 to 7 ordinary chondrites. The temperatures for Tuxtuac (LL5), Dhurmsala (LL6), NWA 2092 (LL6/7), and Dho 011 (LL7) are 767–793°, 818–835°, 872–892°, and 917–936°C, respectively, suggesting that chondrites of higher petrographic types show higher equilibrium temperatures of pyroxenes. The regression equations which relate temperature and Wo and Fs contents in the temperature-contoured pyroxene quadrilateral of 1 atm of Lindsley (1983) are also determined by the least squares method. It is possible to reproduce temperatures with an error less than 20 °C (2SE) using the regression equations.

元の言語 | 英語 |
---|---|

ページ（範囲） | 511-521 |

ページ数 | 11 |

ジャーナル | Meteoritics and Planetary Science |

巻 | 52 |

発行部数 | 3 |

DOI | |

出版物ステータス | 出版済み - 3 1 2017 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Geophysics
- Space and Planetary Science

### これを引用

**Effect of NaCrSi _{2}O_{6} component on Lindsley's pyroxene thermometer : An evaluation based on strongly metamorphosed LL chondrites.** / Nakamuta, Y.; Urata, K.; Shibata, Y.; Kuwahara, Y.

研究成果: ジャーナルへの寄稿 › 記事

_{2}O

_{6}component on Lindsley's pyroxene thermometer: An evaluation based on strongly metamorphosed LL chondrites',

*Meteoritics and Planetary Science*, 巻. 52, 番号 3, pp. 511-521. https://doi.org/10.1111/maps.12808

}

TY - JOUR

T1 - Effect of NaCrSi2O6 component on Lindsley's pyroxene thermometer

T2 - An evaluation based on strongly metamorphosed LL chondrites

AU - Nakamuta, Y.

AU - Urata, K.

AU - Shibata, Y.

AU - Kuwahara, Y.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - In Lindsley's thermometry, a revised sequence of calculation of components is proposed for clinopyroxene, in which kosmochlor component is added. Temperatures obtained for the components calculated by the revised method are about 50 °C lower than those obtained for the components calculated by the Lindsley's original method and agree well with temperatures obtained from orthopyroxenes. Ca-partitioning between clino- and orthopyroxenes is then thought to be equilibrated in types 5 to 7 ordinary chondrites. The temperatures for Tuxtuac (LL5), Dhurmsala (LL6), NWA 2092 (LL6/7), and Dho 011 (LL7) are 767–793°, 818–835°, 872–892°, and 917–936°C, respectively, suggesting that chondrites of higher petrographic types show higher equilibrium temperatures of pyroxenes. The regression equations which relate temperature and Wo and Fs contents in the temperature-contoured pyroxene quadrilateral of 1 atm of Lindsley (1983) are also determined by the least squares method. It is possible to reproduce temperatures with an error less than 20 °C (2SE) using the regression equations.

AB - In Lindsley's thermometry, a revised sequence of calculation of components is proposed for clinopyroxene, in which kosmochlor component is added. Temperatures obtained for the components calculated by the revised method are about 50 °C lower than those obtained for the components calculated by the Lindsley's original method and agree well with temperatures obtained from orthopyroxenes. Ca-partitioning between clino- and orthopyroxenes is then thought to be equilibrated in types 5 to 7 ordinary chondrites. The temperatures for Tuxtuac (LL5), Dhurmsala (LL6), NWA 2092 (LL6/7), and Dho 011 (LL7) are 767–793°, 818–835°, 872–892°, and 917–936°C, respectively, suggesting that chondrites of higher petrographic types show higher equilibrium temperatures of pyroxenes. The regression equations which relate temperature and Wo and Fs contents in the temperature-contoured pyroxene quadrilateral of 1 atm of Lindsley (1983) are also determined by the least squares method. It is possible to reproduce temperatures with an error less than 20 °C (2SE) using the regression equations.

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UR - http://www.scopus.com/inward/citedby.url?scp=85008469173&partnerID=8YFLogxK

U2 - 10.1111/maps.12808

DO - 10.1111/maps.12808

M3 - Article

VL - 52

SP - 511

EP - 521

JO - Meteoritics and Planetary Science

JF - Meteoritics and Planetary Science

SN - 1086-9379

IS - 3

ER -