Introduction: Miller Range 99301 is a type 6, unbrecciated LL chondrite [1]. MIL 99301 is of interest because some compositional and petrographic features suggest it experienced rather high shock grades, whereas other features suggest it is relatively unshocked. Inconsistent shock indicators could be explained if MIL 99301 was shocked but then partly annealed by heat produced by impacts on the ...

Introduction: Howardite-eucrite-diogenite (HED) meteorites belong to the largest group of achondrites and originate from protoplanet 4 Vesta. The surface of Vesta has been extensively affected by impacts which brecciated and mixed eucrite and diogenite material to produce a regolith and formed large basins in the south pole region [1]. Shock features preserved in meteorites due to high-velocity...

Introduction: Although magnetite crystals in ALH84001 have received considerable attention in the literature as a potential biomarker, the sulfide component is important because the coexistence of magnetite and sulfides has also been suggested as a marker for past biogenic activity [1]. Very little research, however, has focused on the formation of sulfides in ALH84001. Early research on the su...

Introduction: Since 1999, the lunar sample collection has been supplemented with about 50 meteorites from the Moon. Many of these stones are paired, and the total number of different lunar meteorites in the present collection is 37. Of these 37, five are lunar mare basalts, which represents ~14% of the lunar meteorite collection. Considering that the maria represent ~17% of the lunar surface, t...

Molecular dynamics (MD) simulation provides a unique window into the microscopic processes controlling the properties of amorphous silicates of geochemical importance. Of special interest are changes in structure and dynamics around the glass transition temperature. Seventeen simulations for composition CaAl2Si2O8 in a microcanonical ensemble of 1300 particles (O + Si + Al + Ca) were conducted ...