OUT 19138

Classification: Ordinary Chondrite L6

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 ‘L’ type – meaning it has low concentrations of iron (i.e. iron metal). The meteorite is also a type 6 sample – which means that it has been greatly 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 OUT 19138

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 second field season in austral summer December 2019 – January 2020 by a six person field party consisting of Katherine Joy, Geoffrey Evatt, Romain Tartèse, Wouter Van Verre, Taff Raymond and Rob Taylor. Found 90% buried within ice at Outer Recovery 4 (south) Icefields. Altitude 1509 m.

Physical characteristics: Mass: 26.55 g. Pieces: 1. Dimensions: 3 × 2 × 2 cm. A blocky, whole stone with 95% black fusion crust and dark brown interior.

Petrography: Equilibrated texture, some clearly delineated chondrules up to 1.6 mm in diameter. Plagioclase grains up to 1.1 mm. Metal and sulfide grains up to 1.0 mm distributed throughout.

Mineral compositions and geochemistry: All analyses by EPMA. Olivine Fa25.3±0.6 (N=37). Pyroxene Fs21.3±0.8Wo1.6±0.2 (N=28).

Specimens: 24.40 g type specimen (main mass) held at the NHM London.

Project comments: No comments

Sample images and videos:

OUT 19138 sample in the field on ice. Image: Lost Meteorites of Antarctica / The University of Manchester
OUT 19138 sample in the lab after defrosting. Image: Lost Meteorites of Antarctica / The University of Manchester
OUT 19138 sample in the lab after defrosting. Image: Lost Meteorites of Antarctica / The University of Manchester