The August issue of Meteoritics and Planetary Science (volume 60, Issue 8) is now up. In it:
Ivanova, M. A. Teplyakova, S. N. Lorenz, C. A. Origin of the metal in chondritic and achondritic lithologies of the Sierra Gorda 013 СBa-like chondrite Pgs 1762 70005
Quillen, A. C. Doran, S. The azimuthal distribution of ejecta mass from oblique impacts into sand Pgs 1835 70006
…to various degrees, everything in MAPS is at least a little citable by this blog. But we have to cut things off somewhere; no terrestrial effects, instrumental reporting, curation details, or other side aspects.
The chondritic meteorites are important, as they were never molten and never ‘ruined’. Achondrites were heated by various processes, and show the alteration effects of this ‘cooking’. But the CB meteorites are a strange brew, indeed. It appears (still being debated) that CBs were involved in serious (high-energy) impacts, and the globules we see in them are drops of molten meteorite that re-cooled and re-collected into the bodies we now see. The meteorite Sierra Gorda 013, among others, shows both original (chondritic) and processed (heated and re-cooled) clasts mixed together. Using the materials in both rock types, Ivanova et al. attempt to trace the history and processes the meteorite represents.
And speaking of asteroid impacts, Quillen et al. do experimental astronomy of those collisions. Using gas cannons, and a stand-in for asteroid regolith as a target, they try to replicate conditions on real bodies. Since micrometeorite bombardment is a common, relentless process on airless bodies, everything we can learn about this space weathering is a puzzle piece that touches so many other pieces.