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Takeda et al. 1983
Takeda, H., Mori, H., Wooden, J.L., Delaney, J.S., Prinz, M. and Nyquist, L.E. (1983). Comparison of Yamato and Victoria land polymict eucrites: A view from mineralogical and isotopic studies. Journal of Geophysical Research 88: doi: 10.1029/JS088iS02p0B245. issn: 0148-0227.

New interior samples of four Yamato polymict eucrites (Y74159, Y74450, Y75011, and Y75015) have been studied by electron microprobe, transmission electron microscope, and X ray diffraction techniques, and compared with several samples of the Victoria Land polymict eucrites. These same samples have been analysed using Rb-Sr and Nd-Sm isotopic systematics. Several grains of inverted pigeonite, with blebby augite similar to those in Binda and Moama, have been identified in all four Yamata eucrites. Coarse-grained mesostasis-rich subophitic basalts, which contain Mg-rich pigeonite (with Fe-rich olivine veinlets) zoned outward to a subcalcic ferroaugite rimes, have also been found. These unique clasts were not found in ALH76005, 77302, 78040, 78158, and 78165 and EET eucrites. The tight grouping of Rb/Sr and Sm/Nd ratios, and similar modal compositions of the Yamato group indicate that they are most likely to be pieces from a single fall, and distinct from the ALH and EET groups. However, the Yamato, Allan Hills, and Elephant Moraine groups may sample a few distinct magmas or similar but different source regions on the same parent body.

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Journal of Geophysical Research
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