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Anomalous Mössbauer parameters in the second generation regolith Ghubara meteorite
Author(s) -
VERMA H. C.,
TRIPATHI R. P.
Publication year - 2004
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.2004.tb00071.x
Subject(s) - meteorite , regolith , chondrite , breccia , magnetite , silicate , geology , astrobiology , ordinary chondrite , weathering , mineralogy , iron meteorite , geochemistry , chemistry , physics , paleontology , organic chemistry
— 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.