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Mineralogy and Petrology of Comet 81P/Wild 2 Nucleus Samples
The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional muchExpand
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The classification of micrometeorites
Due to their small size, the mineralogical and chemical properties of micrometeorites (MMs) are not representative of their parent bodies on the centimeter to meter scales that are used to defineExpand
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Molecular dynamics simulations of CaCO3 melts to mantle pressures and temperatures: implications for carbonatite magmas
Carbonatite magmas have been suggested to be important agents of metasomatism of the lithospheric mantle. However, the structures and properties of this important class of melt have been only poorlyExpand
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A multidisciplinary study of silica sinter deposits with applications to silica identification and detection of fossil life on Mars
Surface features observed on Mars and evidence from martian meteorites both suggest that hydrothermal systems have operated in the crust of the planet. Hydrothermal systems are a potential habitatExpand
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Salt-bearing fumarole deposits in the summit crater of Oldoinyo Lengai, Northern Tanzania: interactions between natrocarbonatite lava and meteoric water
Oldoinyo Lengai in the Northern Tanzania rift is the only active nephelinite–carbonatite stratovolcano. We report the discovery of thermonatrite, aphthitalite, halite and sylvite fumarole deposits onExpand
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Ancient micrometeorites suggestive of an oxygen-rich Archaean upper atmosphere
It is widely accepted that Earth’s early atmosphere contained less than 0.001 per cent of the present-day atmospheric oxygen (O2) level, until the Great Oxidation Event resulted in a major rise in O2Expand
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Possible in situ formation of meteoritic nanodiamonds in the early Solar System
Grains of dust that pre-date the Sun provide insights into their formation around other stars and into the early evolution of the Solar System. Nanodiamonds recovered from meteorites, which originateExpand
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An infrared and Raman study of carbonate glasses: implications for the structure of carbonatite magmas
place constraints on the structures of these glasses and natural carbonatite magmas. The activity of the fundamental modes of the carbonate ion indicate that at least two structural populations ofExpand
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The textures and compositions of fine-grained Antarctic micrometeorites: Implications for comparisons with meteorites
Abstract Micrometeorites recovered from the Earth's surface constitute the most abundant interplanetary dust now falling to Earth. We studied eighty-nine fine-grained Antarctic micrometeoritesExpand
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The fusion crusts of stony meteorites: Implications for the atmospheric reprocessing of extraterrestrial materials
— Fusion crusts develop on all meteorites during their passage through the atmosphere but have been little studied. We have characterized the textures and compositions of the fusion crusts of 73Expand
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