In polished thin section the pyroxenes are brownish in colour, indicative of eucrites, and there appears to be no olivine present which also indicates eucritic composition. The electron microprobe data for this meteorite support our findings. Firstly, a large number of analyses revealed that there is no olivine present. Secondly, the analyses show that this sample is quite equilibrated. There are 2 distinct clusters of pyroxene (low-Ca and high-Ca). Low-Ca Ferrosilite average is 61.7% (<2.8% deviation) and high-Ca Ferrosilite average is 29.2% (5-10% deviation). These compositions are very similar to published data on eucrites. The feldspar totals suggest that it is quite iron rich - average Anorthosite 86.7% - but still plots within the eucrite field.
A. Sexton, Planetary Sciences Research Institute, Open University, UK