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Detection of terrestrial fluorine by proton induced gamma emission (PIGE): A rapid quantification for Antarctic meteorites
Author(s) -
Noll K.,
Döbeli M.,
Krähenbühl U.,
Grambole D.,
Herrmann F.,
Koeberl C.
Publication year - 2003
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.1945-5100.2003.tb00040.x
Subject(s) - meteorite , tephra , weathering , volcano , astrobiology , mineralogy , radiochemistry , geology , environmental chemistry , materials science , chemistry , geochemistry , physics
— The enrichment of fluorine on the surface of Antarctic meteorites is investigated by applying the nuclear reactions 19 F(p, αγ) 16 O or 19 F(p, p'γ) 19 F with the proton induced gamma emission (PIGE) technique, a class of nuclear reaction analysis (NRA). Results for the Antarctic meteorites ALHA77294, TIL 82409, LEW 86015, ALHA77003, and ALH 83108 are presented. Possible sources of terrestrial F are: volcanic exhalation, tephra layers (volcanic glass), continental soil dust, or sea spray. Material from blue‐ice dust‐band samples also shows concentrations of F that are significantly higher than the bulk concentrations of meteorites. Finally, a quick investigation for Antarctic meteorites by external PIGE is proposed, leading to a F‐contamination index that supplements the qualitative ABC‐weathering index.