pyroxene

08/01/2014 - "There is evidence that the parent rock of Nakhla has undergone a shock event from a nearby bolide impact that melted the rims of pyroxene and the interstitial matter and initiated an igneous hydrothermal system of rapidly cooling fluids, which were progressively mixed with fluids from the melted permafrost. "
08/22/1997 - "Both phases are inferred to have transformed from pyroxene at high pressures and temperatures by shock metamorphism. "
01/30/1970 - "Among features revealed by optical, microprobe, x-ray diffraction, and electron microscope methods are extreme zoning and unmixing in pyroxene grains, compositional variations in ilmenites, and effects of shock metamorphism. "
05/22/1997 - "Texture and compositional data show that, during the period of shock decompression, monomineralic melts were injected into pyroxene fractures that were subsequently cooled and resealed within seconds. "
02/15/2017 - "From the shock effect occasionally mixed mineral structures formed, especially feldspars together with pyroxene. "

07/13/2013 - "In this paper, we describe an investigation of the catalytic conversion reaction of acetylene gas to PAHs over pyroxene and alumina. "

04/22/2020 - "Existing olivine and pyroxene δ18O values for the Central Andes are highly variable and potentially not representative of sub-arc parental compositions. "