Mössbauer studies of Soltmany and Shisr 176 meteorites – comparison with other ordinary chondrites

Gałązka-Friedman, J.; Szlachta, Karol; Karwowski, Łukasz; Woźniak, Marek

doi:10.1007/s10751-013-0944-0

Cited by 18 publications

(13 citation statements)

References 10 publications

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“…; Galazka‐Friedman et al. ) analyzed whole rock samples and thus could not assign Fe 3+ , when detected, to any particular phase. Some workers (Shrivastava et al.…”

Section: Discussionmentioning

confidence: 99%

“…Unfortunately, this is a difficult comparison to make because pyroxenes rarely make up 100% of any meteorite, and thus results must be indirectly interpreted from whole rock spectra or from time-consuming mineral separates. There have been numerous studies of meteorites by M€ ossbauer spectroscopy but the results are mixed because most of them (e.g., Malasheva 1994;Abdu and Ericsson 1997;Lipka et al 1997Lipka et al , 2013Lipka et al , 2014Grandjean et al 1998;Rusakov et al 2000;Ludwig et al 2001;Hoffman 2002;Verma et al 2003;Gismelseed et al 2004Gismelseed et al , 2005Zhiganova et al 2007;Oshtrakh et al 2008aOshtrakh et al , 2008bGrokhovsky et al 2009;Sitek et al 2012;Galazka-Friedman et al 2014) analyzed whole rock samples and thus could not assign Fe 3+ , when detected, to any particular phase. Some workers (Shrivastava et al 1997;Munayco et al 2013;Gismelseed et al 2014;Maksimova et al 2015) studied fresh falls and found little or no Fe 3+ , but in most cases the whole rock spectra are so complicated that Fe 3+ was unlikely to be detected.…”

Section: Comparisons With Meteoritic Pyroxenesmentioning

confidence: 99%

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Impact‐related thermal effects on the redox state of Ca‐pyroxene

McCanta

Dyar

2016

Meteorit & Planetary Scien

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Oxidation is observed in Ca‐pyroxene subjected to a range of shock pressures (21–59 GPa). Changes in the pyroxene redox ratio as measured by the changes in %Fe3+ ranged from 2–6 times the starting composition. Mössbauer and reflectance spectroscopy record the changing Fe3+ concentration as a preferential oxidation of Fe2+ in the M2 crystallographic site. The oxidation is also accompanied by mechanical changes in the pyroxene crystals including fracturing, linear defects, and twinning. As oxygen fugacity is often calculated using mineral redox ratios and thought to represent the prevailing fO2 during crystallization, it is imperative to recognize that the fO2 values measured in impact‐derived materials may represent that of the impact and not the magma source region.

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“…; Galazka‐Friedman et al. ) analyzed whole rock samples and thus could not assign Fe 3+ , when detected, to any particular phase. Some workers (Shrivastava et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Comparisons With Meteoritic Pyroxenesmentioning

confidence: 99%

Impact‐related thermal effects on the redox state of Ca‐pyroxene

McCanta

Dyar

2016

Meteorit & Planetary Scien

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“…Our group has published three papers on this subject (Gałązka‐Friedman et al. , ; Szlachta et al. ).…”

Section: Introductionmentioning

confidence: 99%

Application of Mössbauer spectroscopy, multidimensional discriminant analysis, and Mahalanobis distance for classification of equilibrated ordinary chondrites

Woźniak

Gałązka-Friedman

Duda

et al. 2019

Meteorit & Planetary Scien

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Mössbauer spectra of equilibrated ordinary chondrites consist of two doublets due to paramagnetic iron present in olivines and pyroxenes and two sextets due to magnetically ordered iron present in metallic phases and troilite. The spectral areas of the different mineralogical phases found by Mössbauer spectroscopy in meteorites are proportional to the number of iron atoms in this mineralogical phase. This property of Mössbauer spectra can be the basis for constructing a method for the classification of ordinary chondrites. This idea was first explored at the Mössbauer Laboratory in Kanpur. This group suggested a qualitative method based on 2‐dimensional plots of Mössbauer spectral areas and thus classified properly some meteorites. We constructed a quantitative method using Mössbauer spectral areas, multidimensional discriminant analysis, and Mahalanobis distance (4M method) to determine the probability of a meteorite to be of type H, L, or LL. Based on 59 Mössbauer spectra, we calculated by the 4M method, Scluster, the level of similarity of the Goronyo meteorite to the clusters. On the plot of ferrosilite versus fayalite, the point representing Goronyo is located on the border between H and L areas. Calculated by the 4M method, the meteorite Goronyo is 32% similar to type H, 75% to type L, and 11% to type LL. Additional mineralogical analyses suggested that the Goronyo meteorite would be classified as type L, although it was originally reported as type H in the Meteoritical Bulletin Database.

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“…In the last 20 years several studies on the use of Mössbauer spectroscopy for classification of ordinary chondrites were published [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Mӧssbauer spectroscopy as a useful method for distinguishing between real and false meteorites

et al. 2019

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In our paper four Mӧssbauer spectra of ordinary chondrites (previously classified by a classical method based on determining the ratio of ferrosilite (Fs) to fayalite (Fa) with an electron microprobe) are presented and discussed. These are the Mӧssbauer spectra of two ordinary chondrites type H (Pultusk and Grzempach), one ordinary chondrite type L (Hyattville) and one type LL (NWA 6287). These meteorites were compared, using their Mӧssbauer spectra with the following four other samples: a fragment of a rock that fell near Leoncin in Poland (sample No. 1), a fragment of a rock found in the vicinity of Pultusk in Poland (sample No. 2), a meteorite specimen bought on the meteorite exchange (sample No. 3) and a stone object whose decline was observed in Europe (sample No. 4). The spectrum of sample No. 1 is very similar to the spectrum of ordinary chondrite of type LL. This observation was confirmed using 4M method (previously created by us). The spectrum of sample No. 2 differs significantly from the spectrum of sample of the Pultusk meteorite. In the spectrum of sample No. 3, a clear signal from iron-nickel alloy and troilite can be observed. This fact allows us to state that sample No. 3 is a fragment of rock that was created in cosmic conditions. Sample No. 4 has a Mӧssbauer spectrum similar to the spectrum of terrestrial magmatic rocks. This observation does not clearly determine where the examined object comes from. This work demonstrates the usefulness of Mӧssbauer spectroscopy in recognizing samples that are fragments of meteorites.

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Mössbauer studies of Soltmany and Shisr 176 meteorites – comparison with other ordinary chondrites

Cited by 18 publications

References 10 publications

Impact‐related thermal effects on the redox state of Ca‐pyroxene

Impact‐related thermal effects on the redox state of Ca‐pyroxene

Application of Mössbauer spectroscopy, multidimensional discriminant analysis, and Mahalanobis distance for classification of equilibrated ordinary chondrites

Mӧssbauer spectroscopy as a useful method for distinguishing between real and false meteorites

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