μXAFS and TEM studies of Fe(III) oxides precipitated on submarine basaltic glass from South Pacific Gyre

S. Mitsunobu, Yuki Suzuki, K. Watanabe, K. Yang, J. W. Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the present study, we investigated secondary products formed on the surface of altered basaltic glass from the sediment-basalt interface by multiple characterizations with EPMA, μXANES, μEXAFS, TEM, and EELS. μXANES and EPMA analyses showed that secondary products with high Fe abundance were precipitated on the surface of basalt glass and that the Fe species in the secondary product was dominantly composed of Fe(III) oxides, hematite, which was also agreeable with EELS result. Characterization by TEM and μEXAFS suggested that the hematite was nanoparticulate with particle size of 10–20 nm. This is the first study showing the occurrence of nanosized hematite as secondary products in altered basaltic glass, although there are many studies on the formation of Fe(III) (hydr)oxides in basalt alteration.

Original languageEnglish
Pages (from-to)51-57
Number of pages7
JournalChemical Geology
Volume501
DOIs
Publication statusPublished - 2018 Nov 30
Externally publishedYes

Fingerprint

gyre
Oxides
transmission electron microscopy
Electron energy loss spectroscopy
glass
oxide
Electron probe microanalysis
hematite
Transmission electron microscopy
Glass
basalt
Sediments
Particle size
particle size
product
ferric oxide
sediment

Keywords

  • Alteration
  • Basaltic glass
  • Hematite
  • TEM
  • XAFS

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

Cite this

μXAFS and TEM studies of Fe(III) oxides precipitated on submarine basaltic glass from South Pacific Gyre. / Mitsunobu, S.; Suzuki, Yuki; Watanabe, K.; Yang, K.; Kim, J. W.

In: Chemical Geology, Vol. 501, 30.11.2018, p. 51-57.

Research output: Contribution to journalArticle

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AU - Kim, J. W.

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