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The Petrochemistry of Jake_M: A Martian Mugearite

Abstract : "Jake_M," the first rock analyzed by the Alpha Particle X-ray Spectrometer instrument on the Curiosity rover, differs substantially in chemical composition from other known martian igneous rocks: It is alkaline (>15% normative nepheline) and relatively fractionated. Jake_M is compositionally similar to terrestrial mugearites, a rock type typically found at ocean islands and continental rifts. By analogy with these comparable terrestrial rocks, Jake_M could have been produced by extensive fractional crystallization of a primary alkaline or transitional magma at elevated pressure, with or without elevated water contents. The discovery of Jake_M suggests that alkaline magmas may be more abundant on Mars than on Earth and that Curiosity could encounter even more fractionated alkaline rocks (for example, phonolites and trachytes).
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Submitted on : Thursday, June 19, 2014 - 12:10:27 PM
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  • HAL Id : hal-01010148, version 1


E. M. Stolper, M. B. Baker, M. E. Newcombe, M. E. Schmidt, A. H. Treiman, et al.. The Petrochemistry of Jake_M: A Martian Mugearite. Science, American Association for the Advancement of Science, 2013, 341 (6153), pp.1239463. ⟨hal-01010148⟩



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