Classification: Ordinary Chondrite LL6
Explainer: This means that the sample is from an asteroid parent body. It represents early Solar System material which includes chondrules (small round melt droplets). It is from a very common type of chondrule-bearing meteorite called the ordinary chondrite class. This particular type is an ‘LL’ type – meaning it has very low concentrations of iron (i.e. iron metal). The meteorite is also a type 6 sample – which means that it has been moderately metamorphosed (heated and/or held under high pressure). You can see more about where this sample fits into the meteorite classification scheme by looking at this page.
Description: Taken from the Meteoritical Bulletin for HUT 18029
History: The meteorite was recovered as part of the Lost Meteorites of Antarctica project, which was funded in the UK by the Leverhulme Trust and supported by the British Antarctic Survey and the University of Manchester. These samples were collected as part of the project’s first field season in austral summer December 2018 – January 2019 by a two person field party consisting of Katherine Joy and Julie Baum. Found on blue ice surface/stuck on ice at Hutchison Icefield. Altitude 1264 m.
Physical characteristics: Mass: 810.9 g. Pieces: 2. Dimensions: 13 cm x 12 cm x 8 cm. An elongate, whole stone with 90% fusion crust and black exterior.
Petrography: Abundant chondrules (up to 1.5 mm in diameter), chondrule fragments and mineral grains in a matrix. Metal and sulfide occur rimming chondrules and as blebs.
Mineral compositions and geochemistry: All analyses by EPMA. Olivine Fa 28.4±0.3 (N=8), Pyroxene Fs 23.5±0.3 (N=12), Wo 1.6±0.1 (N=12).
Specimens: 810.9 g type specimen (main mass) held at the NHM London.
Project comments: This sample was spotted from afar during a skidoo search as it was such a large sample it could be easily seen on the ice surface. Conditions on the search day were tricky as there was blowing snow.
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