Mössbauer埃及南部陆相橄榄玄武岩中铁相的研究

Q4 Earth and Planetary Sciences

Mineralogia Pub Date : 2013-06-01 DOI:10.2478/mipo-2013-0001

K. Hassan, J. Dekan

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引用次数: 3

摘要

摘要利用297和77 K的57Fe Mössbauer光谱、光学显微镜和x射线衍射对埃及南部的橄榄玄武岩进行了研究。57Fe Mössbauer光谱显示出三磁性六重体、三重态铁(Fe2+)和一个由纳米相氧化物(npOx)引起的弱铁(Fe3+)重态。磁性六重体与钛磁铁矿有关，Fe2+双重体与橄榄石、辉石和ulvöspinel有关。各种Fe组分的超细参数的变化归因于局部晶体化学的变化。岩石的氧化强度(Fe3+/ΣFe)在20 ~ 27%之间，氧化后的铁主要存在于钛磁铁矿中。

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Mössbauer study of Fe phases in terrestrial olivine basalts from southern Egypt

Abstract Olivine basalts from southern Egypt were studied by 57Fe Mössbauer spectroscopy at 297 and 77 K, and by optical microscopy and X-ray diffraction. The 57Fe Mössbauer spectra show three-magnetic sextets, three doublets of ferrous (Fe2+), and a weak ferric (Fe3+) doublet that is attributable to a nanophase oxide (npOx). The magnetic sextets relate to titanomagnetite and the Fe2+ doublets to olivine, pyroxene, and ulvöspinel. Variations in the hyperfine parameters of the various Fe components are attributed to changes in the local crystal chemistry. The intensity of oxidation (Fe3+/ΣFe) in the rocks varies from 20-27% with the oxidized iron largely residing in the titanomagnetite.

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来源期刊

Mineralogia Earth and Planetary Sciences-Geology

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： - original papers in the scope of widely understood mineralogical sciences (mineralogy, petrology, geochemistry, environmental sciences, applied mineralogy etc.) - research articles, short communications, mini-reviews and review articles