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Showing 1 to 6 of 6 for “"Achondrites"”.
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Partial Melting on FeO-Rich Asteroids: Insights to the First Stage of Planetary Differentiation
… These meteorites, called the primitive achondrites, are a window to the first stage of melting in the early solar system. The primitive achondrites with FeO-poor silicate compositions have been well-studied, but little is known about the formation conditions and history of the FeO-rich …
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Aspects of the chemistry of some stony meteorites
… Ten eucrites, four howardites, three enstatite achondrites, eight HL chondrites, the one known chassignite and a chondrite inclusion from the Cumberland Falls achondrite have been analysed for major, minor and some trace elements (viz. Fe, Mn, Ca, Cr, P, Si, Al, Mg, Na, K, Sr, Zr, Y, Ba and Ni) …
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Magnetic fields in the early solar system
… Meanwhile, measurements of eucrites, a class of achondrites believed to originate from the asteroid Vesta, suggest that Vesta once hosted a magnetic core dynamo. New techniques developed during the course of these measurements permit ongoing and future investigations of the remanent …
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NATURAL ANALOGUES OF PLANET MERCURY’S SURFACE: MINERALOGICAL AND SPECTROSCOPIC ASPECTS
… NWA 14185) and four enstatite chondrites, achondrites and melt rocks (Itqiy, NWA 4945, NWA 13266, NWA 13210). SEM (Scanning Electron Microscope) and EPMA (Electron Probe Micro Analyzer) analyses revealed that the samples are mainly composed of nearly FeO-free enstatite, with variable …
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THE CONCENTRATION OF HYDROGEN IN INCOMPLETELY AND WHOLLY MELTED TERRESTRIAL BUILDING BLOCKS
… Earth’s H budget in the case of the enstatite achondrites (i.e., aubrites). However, achondritic materials are predominantly highly H-poor relative to chondritic materials, and it is unclear if the aubrites are an anomaly, and at which stage of planetesimal evolution H and other HVEs are lost. …
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Iron Isotope Cosmochemistry
… fractionation in EL6 chondrites and aubrite achondrites are discussed in terms of the origins of these meteorites with metal/sulfide/silicate differentiation. Finally, I provide a new estimate of the Fe isotopic fractionation factor between metal and sulfide at the equilibrium temperature …