LAR 06319 - Olivine Shergottite
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Fact sheet
Description: 

This olivine-phyric shergotitte was found in 2006 near the Larkman Nunatak, Antarctica. Isotopic techniques have produced a range of ages for the sample - 179 m.y. (Lu-Hf), 190 m.y. (Sm-Nd) and 207 m.y. (Rb-Sr).

Much of the outer surface of the sample is a brown-black fusion crust with a fine-grained wrinkled texture. The interior is grey-black in colour and the matrix is both fine-grained and very hard.

The mineral assemblage consists of olivine phenocrysts set in a matrix of pyroxene (enstatite, pigeonite and augite) and plagioclase feldspar (now converted to maskelynite). Accessory constituents include apatite, merrillite, chromite, Ti-chromite, troilite, pyrrhotite and pyrite. Small melt inclusions occur in the olivine and pyroxene. Shock melt veins cut the sample.

This description is based on the work of NASA scientist Charles Meyer - compiler of The Mars Meteorite Compendium. Further details are available from the Antarctic Meteorite Newsletter.

In Place
In Time
Location description: 
Larkman Nunatak, Antarctica
Accuracy:
Location precision: 
Good
Timescale:
Timescale: 
Jurassic
Ma = Millions of years ago
In Focus
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Type:
Type: 
meteorite
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