The University of Arizona

Anomalous Mössbauer parameters in the second generation regolith Ghubara meteorite

H. C. Verma, R. P. Tripathi

Abstract


We conducted Mössbauer spectroscopic studies on the Ghubara meteorite which had been described as at least two-generation regolith breccia on the macro scale. The isomer shift and quadrupole splitting of the Fe-Ni part are quite different from those obtained in ordinary chondrites, reflecting shock effects. We observed a large amount of magnetite that may have come from weathering of, primarily, the silicate fraction. We found very similar iron mineralogy in the Densmore meteorite.

Keywords


ordinary Chondrites;Mössbauer spectroscopy;Shock;Weathering

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