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Shock metamorphism of ordinary chondrites
A revised petrographic classification of progressive stages of shock metamorphism of ordinary chondrites is proposed. Six stages of shock (S1 to S6) are defined, based on shock effects in olivine andExpand
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Meteoritic parent bodies: Their number and identification
Extensive collection efforts in Antarctica and the Sahara in the past 10 years have greatly increased the number of known meteorites. Groupings of meteorites according to petrologic, mineralogical,Expand
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Mineralogical and chemical relationships among enstatite chondrites
Fifteen of the sixteen known enstatite chondrites were studied microscopically in reflected and transmitted light, and their modal compositions were determined by point-counting techniques.Expand
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Constraints on the role of impact heating and melting in asteroids
(Received 1996 August 30; accepted in revised form 1997 January 30) Abstract-Imaging of asteroids Gaspra and Ida and laboratory studies of asteroidal meteorites show that im- pacts undoubtedly playedExpand
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Geological History of Asteroid 4 Vesta: The "Smallest Terrestrial Planet"
The asteroid 4 Vesta is the only known differentiated asteroid with an intact internal structure, probably consisting of a metal core, an ultramafic mantle, and a basaltic crust. ConsiderableExpand
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Angrites, a small but diverse suite of ancient, silica-undersaturated volcanic-plutonic mafic meteorites, and the history of their parent asteroid
Abstract Angrites are medium- to coarse-grained (up to 2–3 mm), unbrecciated and substantially unshocked igneous rocks of roughly basaltic composition. They are the most alkali-depleted basalts inExpand
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On the phase composition of meteorites
Seventy-three chondrites were examined. Their content of metallic nickel-iron, troilite, chromite, and silicate was determined quantitatively by planimetric integration of polished sections with anExpand
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Global Crustal Metamorphism of the Eucrite Parent Body
Abstract We conducted a petrologic study of 18 equilibrated eucrites with the goal of understanding the formation and evolution of the crust of asteroid 4 Vesta, the likely source of eucriteExpand
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Signatures of the martian atmosphere in glass of the Zagami meteorite.
Isotopic signatures of nitrogen, argon, and xenon have been determined in separated millimeter-sized pockets of shock-melted glass in a recently identified lithology of the meteorite Zagami, aExpand
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Al-rich objects in ordinary chondrites: Related origin of carbonaceous and ordinary chondrites and their constituents
Ca-Al-rich inclusions (CAIs), common constituents of carbonaceous chondrites, have been studied extensively because they contain refractory, high-temperature minerals, suggesting that they formed atExpand
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