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Assessing global trends in Mars magma compositions using ground truth

Head, James W.; Rogers, A. Deanne; McSween, Harry Y. +1 more

Global magmatic trends inferred from gamma-ray, visible/near-infrared, and thermal infrared spectrometers on Mars-orbiting spacecraft have been used to constrain planetary petrogenetic processes and global thermal evolution models. Inferred magmatic trends include temporal variations in the relative proportions of low-Ca and high-Ca pyroxenes, and…