Divalent chromium in ferropericlase inclusions in lower-mantle diamonds revealed by micro-XANES measurements
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概要
- 論文の詳細を見る
Chromium K-edge X-ray absorption near-edge structure (XANES) spectra of natural ferropericlase were measured using an X-ray microbeam from a synchrotron radiation source to estimate the valence state of Cr. Measured samples were inclusions collected from lower-mantle diamonds. The obtained results revealed that divalent chromium is present in the materials in the lower mantle and that the proportion of Cr2+ in the total Cr content varied among the samples. The valence state of chromium in the inclusions in diamonds is a potential indicator of the redox conditions in the lower mantle.
- 日本鉱物科学会の論文
- 2008-10-01
著者
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OHTA ATSUYUKI
Geological Survey of Japan, AIST
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KAGI HIROYUKI
Geochemical Laboratory, The University of Tokyo
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Arakawa Masashi
Geochemical Laboratory Graduate School Of Science The University Of Tokyo
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Kagi Hiroyuki
Geochemical Lab. Graduate School Of Sci. The Univ. Of Tokyo
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Ohta Atsuyuki
Geological Survey Of Japan Advanced Institute Of Science And Technology (aist)
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ODAKE Shoko
Geochemical Laboratory, Graduate School of Science, The University of Tokyo
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FUKURA Satoshi
Geochemical Laboratory, Graduate School of Science, The University of Tokyo
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HARTE Ben
Department of Geology and Geophysics, University of Edinburgh
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Harte Ben
Department Of Geology And Geophysics University Of Edinburgh
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Odake Shoko
Geochemical Laboratory Graduate School Of Science The University Of Tokyo
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Fukura Satoshi
Geochemical Laboratory Graduate School Of Science The University Of Tokyo
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