Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1141s&link_type=abstract
Lunar and Planetary Science, volume 27, page 1141
Computer Science
Chondrites: Cm, Iron Phyllosilicates, Lithium, Nebular Alteration, Time-Of-Flight Secondary Ion Mass Spectrometry (Tof-, Ims)
Scientific paper
Imaging time-of-flight secondary ion mass spectrometry (TOF-SIMS) is an excellent technique for investigating the micro-distribution of elements within different components of chondrites. We used this technique to study the elemental distribution of Lithium within the CM chondrites Cold Bokkeveld, Yamato 791198, and Banten. Lithium can be detected by TOF-SIMS with high sensitivity. Lithium enrichments were exclusively found within CAIs and mainly occur in the Fe-rich phyllosilicates that are located between the outer Wark-Lovering rim and the core of the Ca,Al-rich inclusions. Since Li-enrichments have not been found within the Fe-rich phyllosilicates of the matrix, it is suggested that those within CAIs were formed by alteration in a different environment. We suggest a nebular origin for alteration of Ca,Al-rich inclusions.
Bischoff Addi
Jessberger Elmar K.
Schirmeyer S.
Stephan Thomas
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