Crystallization temperature determination of Itokawa particles by plagioclase thermometry with X-ray diffraction data obtained by a high-resolution synchrotron Gandolfi camera

Masahiko Tanaka, Tomoki Nakamura, Takaaki Noguchi, Aiko Nakato, Hatsumi Ishida, Toru Yada, Kei Shirai, Akio Fujimura, Yukihiro Ishibashi, Masanao Abe, Tatsuaki Okada, Munetaka Ueno, Toshifumi Mukai

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4 Citations (Scopus)

Abstract

The crystallization temperatures of Itokawa surface particles recovered by the space probe Hayabusa were estimated by a plagioclase geothermometer using sodic plagioclase triclinicity. The Δ131-index required for the thermometer, which is the difference in X-ray diffraction peak positions between the 131 and 13-1 reflections of plagioclase, was obtained by a high-resolution synchrotron Gandolfi camera developed for the third generation synchrotron radiation beamline, BL15XU at SPring-8. Crystallization temperatures were successfully determined from the Δ131-indices for four particles. The observed plagioclase crystallization temperatures were in a range from 655 to 660 °C. The temperatures indicate crystallization temperatures of plagioclases in the process of prograde metamorphism before the peak metamorphic stage.

Original languageEnglish
Pages (from-to)237-244
Number of pages8
JournalMeteoritics and Planetary Science
Volume49
Issue number2
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Space and Planetary Science

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    Tanaka, M., Nakamura, T., Noguchi, T., Nakato, A., Ishida, H., Yada, T., Shirai, K., Fujimura, A., Ishibashi, Y., Abe, M., Okada, T., Ueno, M., & Mukai, T. (2014). Crystallization temperature determination of Itokawa particles by plagioclase thermometry with X-ray diffraction data obtained by a high-resolution synchrotron Gandolfi camera. Meteoritics and Planetary Science, 49(2), 237-244. https://doi.org/10.1111/maps.12215