PIXE Analysis of Trace Elements in Eutectic FeNi-FeS Blobs
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Yanzhuang H6 chondrite is a heavily shocked, severely reheated, partly melted and recrystallized meteorite. Based on SEM and EPMA studies, the distributions of major and trace elements in FeNi-FeS blobs were analyzed quantitatively by a scanning proton microprobe with TTSPM software package. The results of Fe and Ni mapping show the core-crust microstructure of FeNi metal dendrites and the core is consisted of kamacite (α-FeNi) and its phase product martensite, and the crust is consisted of taenite (γ-FeNi) and plessite. It was also revealed that the S does not exist in the FeNi metal dendrites, and the contents of other trace elements, such as P, K, Ca, Cu, Zn, As, Ge, and Se, are very low. The troilite (FeS) fills in gaps between FeNi metal dendrites and contains most of trace elements, and the elements Cu, Zn, and Se seem to distribute also in gaps.
KeywordsYanzhuang chondrite Metal dendrite Proton-induced X-ray emission Trace element proton-induced X-ray emission
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