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Fluorescent accessory phases in the carbonaceous matrix of ureilites
Author(s) -
Berkley John L.,
Taylor G. Jeffrey,
Keil Klaus,
Healey John T.
Publication year - 1978
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl005i012p01075
Subject(s) - achondrite , meteorite , pigeonite , pyroxene , matrix (chemical analysis) , parent body , geology , geochemistry , basalt , olivine , mineralogy , chemistry , astrobiology , augite , chondrite , paleontology , biology , quartz , plagioclase , chromatography
The carbonaceous matrix of ureilite meteorites (C‐bearing olivine‐pigeonite achondrites) contain abundant minute phases that emit a multicolored fluorescence under electron bombardment. These phases include NaCl and KCl, found in all seven ureilites studied, high‐Si glass with pyroxene and chlorapatite quench crystals in North Haig, an unidentified high‐Ca‐Al‐Cl phase in Novo Urei, and possibly free SiO 2 in Novo Urei and Dingo Pup Donga. The origin of these phases is uncertain but some, especially chlorides and glass, may represent residual postcumulus materials precipitated from a late‐stage interstitial liquid during the igneous phase of ureilite history.