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Investigations of Al-Dalang and Al-Hawashat meteorites
Sultan Qaboos Univ, Coll Sci, Box 36, Al Khoud 123, Oman..
Univ Khartoum, Fac Sci, Dept Geol, Khartoum, Sudan..
Sultan Qaboos Univ, Coll Sci, Box 36, Al Khoud 123, Oman..
Sultan Qaboos Univ, Coll Sci, Box 36, Al Khoud 123, Oman..
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2016 (English)In: Hyperfine Interactions, 2016, 14Conference paper (Refereed)Text
Abstract [en]

Mossbauer spectroscopy, X-ray diffraction (XRD) measurements, and electron microprobe analysis (EMPA) have been performed on two meteorites named Al-Dalang and Al-Hawashat after identifying their falling sites in the Western region of Sudan. These two meteorites are ordinary chondrites with similar mineralogy. XRD and EMPA show that the two specimens consist of primary olivine, ortho-pyroxene and later crystallising clino-pyroxene as reaction rims against plagioclase. Fe-metal phases are dominated by kamacite (approximate to 6 wt.% Ni) and minor amounts of tetrataenite (approximate to 52 wt.% Ni). Troilite (FeS) and alabandite (MnS) are optically observed as sulphide phases. The Mossbauer measurements at 295 and 78 K are in agreement with the above characterizations, showing at least two paramagnetic doublets which are assigned to olivine and pyroxene and magnetic sextets assigned to kamacite (hyperfine field approximate to 33.5 T) and troilite FeS (hyperfine field approximate to 31 T).

Place, publisher, year, edition, pages
2016. 14
Keyword [en]
Mossbauer spectroscopy, Ordinary chondrites, Meteorite, Petrography, Kordofan
National Category
Astronomy, Astrophysics and Cosmology Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-301464DOI: 10.1007/s10751-016-1246-0ISI: 000372729500013OAI: oai:DiVA.org:uu-301464DiVA: diva2:954792
Conference
International Conference on the Applications of the Mossbauer Effect (ICAME), SEP 13-18, 2015, Hamburg, GERMANY
Available from: 2016-08-23 Created: 2016-08-23 Last updated: 2016-08-23Bibliographically approved

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