Three more meteorites have been classified from the first search season in 2018-2019. If you want to find out more about how we have classified these samples take a look at this blog post.
This time we announce the collection and classification of two samples that are achondrites – meaning they are from parent asteroids that have been differentiated (see here for more details). These two samples are classified as mesosiderites – called OUT 18014 (made up of two separate stones found about 5 m apart from each other) and OUT 18018 (one stone) found ~1.7 km away from the other two samples.
Mesosiderites are an unusual type of meteorite – they are stony-iron, meaning that they are made up of roughly equal parts silicate minerals and iron metal. As of May 2021 there are only 280 meteorites that have been classified as being a mesosiderite, with only 61 of the group having been found in Antarctica. In terms of the Lost Meteorite of Antarctica project goals, finding this sample is very interesting – as it is a stony-iron type of meteorite we would have perhaps expected to find meteorites like this sitting below the ice, rather than on the top ice surface. We are looking into this question as we classify more of the samples we found.
We also report another L-chondrite sample (adding to the list that we previously reported – see below. This one is called OUT 18004 and it looks like this:
These newly classified stones join the first nine chondrite samples we announced early in May 2021: see below for a gallery of the previous meteorites classified from the project.
A list of all the meteorites classified so far can be found here.