Abstract
A FELDSPATHIC microbreccia from the Descartes region of the lunar highlands contains an unusual assemblage of pyroxene fragments. The numerous angular grains exhibit striking subsolidus exsolution textures that indicate a very advanced state of equilibration between the participating phases. Previous work on the subsolidus behaviour of lunar pyroxenes has been confined chiefly to submicroscopic exsolution. This required resolution by X-ray diffraction analysis which could not provide the specific major and minor element compositions of each phase.
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References
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PECKETT, A., BROWN, G. Plutonic or Metamorphic Equilibration in Apollo 16 Lunar Pyroxenes. Nature 242, 252–255 (1973). https://doi.org/10.1038/242252a0
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DOI: https://doi.org/10.1038/242252a0
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