Wiluna District, Western Australia, Australia
A stone of 19 g was found by an Aborigine meteorite hunter in the Millbillillie strewnfield. It has a complete fusion crust, the interior shows a microbreccia with white angular clasts in a dark matrix (impact melt breccia, calculated from the bulk analysis: 50% anorthosite, 20% KREEP, 15% Luna- 16 type low-Ti mare basalt and 15% Sc-Cr-V components). Information and analysis, Fe/Mn = 73-78, KREEP pattern of REE, Dolores H. Hill, Lunar Planetary Laboratory, University of Arizona, Tucson AZ 85726, USA. See also, D. H. Hill, W. V. Boynton and R. A. Haag, Nature, 1991, in press. The main mass is with Robert Haag, P. O. Box 27527, Tucson, AZ 85726, USA.
Because Calcalong Creek is a regolith breccia, it has a vesicular fusion crust, as do some lunar meteorites from Antarctica. The vesicles form from release of solar-wind implanted gases during the heating melting of the exterior associated with atmospheric entry.
It’s compositionally distinct from Lynch 002, the only other lunar meteorite from Australia, but similarly rich in incompatible elements like Th. The two Australian lunar meteorites were found 859 km apart.
Meteoritical Bulletin Database
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