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Interstellar grains in meteorites: I. Isolation of SiC, graphite and diamond; size distributions of SiC and graphite
A procedure has been developed for isolating three types of interstellar grains from primitive meteorites, in >90% purity and yields of generally ≥70%, and is here applied to the Murchison C2MExpand
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Solar-system abundances of the elements
Abstract A new abundance table has been compiled, based on a critical review of all C1 chondrite analyses up to mid-1982. Where C1 data were inaccurate or lacking, data for other meteorite classesExpand
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Origin, age, and composition of meteorites
This paper attempts to bring together and evaluate all significant evidence on the origin of meteorites.The iron meteorites seem to have formed at low pressures. Laboratory evidence shows that theExpand
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Distribution of gold and rhenium between nickel-iron and silicate melts: implications for the abundance of siderophile elements on the Earth and Moon
Abstract The distribution equilibrium of Au and Re between nickel-iron and basaltic melts was studied at 1400–1600°C, using radioactive tracers. Metal/silicate distribution coefficients were 1–3Expand
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Interstellar Grains in Primitive Meteorites: Diamond, Silicon Carbide, and Graphite
Primitive meteorites contain a few parts per million (ppm) of pristine interstellar grains that provide information on nuclear and chemical processes in stars. Their interstellar origin is proven byExpand
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Noble gases in “phase Q”: Closed-system etching of an Allende residue
The authors have analyzed for the first time, in nearly pure form, the noble gases in phase Q', the elusive major carrier of the planetary gases in carbonaceous chondrites. Noble gases were extractedExpand
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Meteoritic material at five large impact craters
Sixteen crater samples were analyzed by radiochemical neutron activation analysis for Ge, Ir, Ni, Os, Pd and Re. Two impact melt rock samples from Clearwater East (22 km) showed strong, uniformExpand
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INTERSTELLAR GRAINS IN METEORITES : III. GRAPHITE AND ITS NOBLE GASES
Abstract Four density fractions of interstellar graphite were analyzed for isotopically anomalous noble gases by stepped heating. As in SiC, the dominant components show the signature of theExpand
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Noble gases in carbonaceous chondrites
He, Ne, Ar, Kr and Xe were measured in 73 samples of 32 carbonaceous chondrites and 3 ureilites. All carbonaceous chondrites contain “planetary” primordial gas; many also contain “solar” gas. TypesExpand
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Meteorites and the Early Solar System
Chondrite classification, primordial matter composition and early solar system chemical processes, discussing cosmic gas condensation and refractory element fractionation
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