Studies and characterizations of the Al Zarnkh meteorite

A. M. Gismelseed, S. Bashir, M. A. Worthing, A. A. Yousif, M. E. Elzain, A. D. Al Rawas, H. M. Widatallah

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A newly fallen Sudanese meteorite named Al Zarnkh was investigated using room and liquid nitrogen temperature Mössbauer measurements, X-ray diffraction (XRD), and electron probe microanalysis (EPMA) in conjunction with energy dispersive X-ray microscopy. The Mössbauer spectra exhibited strong paramagnetic doublets with magnetic sextets. The doublets are assigned to olivine and pyroxene, while the magnetic sextets are assigned to troilite and kamacite. Based on microprobe analyses and textural studies, olivine is the most abundant phase and occurs as fine to medium grained laths both in the groundmass and in barred olivine chondrules. Both orthopyroxenes and clinopyroxenes are present and these tend to be granular. Plagioclase is an abundant interstitial groundmass phase. Chromites were detected in some groundmass olivine and are highly chromium-and iron-rich with no Fe3+ detected. The kamacite contains small amounts of Co. The mole fraction of the Fe end-member of olivine (fayalite) and orthopyroxene (ferrosilite) are found to be about 28% and 23%, respectively. These values are compared with that obtained from two chondritic meteorites. Based on these results, the studied meteorite is classified as an ordinary LL5 chondrite.

Original languageEnglish
Pages (from-to)255-259
Number of pages5
JournalMeteoritics and Planetary Science
Volume40
Issue number2
Publication statusPublished - Feb 2005

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meteorites
olivine
meteorite
kamacite
troilite
fayalite
chondrule
chromites
ordinary chondrite
chondrites
electron probes
chromite
plagioclase
microanalysis
orthopyroxene
liquid nitrogen
electron probe analysis
pyroxene
rooms
temperature measurement

ASJC Scopus subject areas

  • Geophysics

Cite this

Studies and characterizations of the Al Zarnkh meteorite. / Gismelseed, A. M.; Bashir, S.; Worthing, M. A.; Yousif, A. A.; Elzain, M. E.; Al Rawas, A. D.; Widatallah, H. M.

In: Meteoritics and Planetary Science, Vol. 40, No. 2, 02.2005, p. 255-259.

Research output: Contribution to journalArticle

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