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Meteoritics, 1981
Large vugs occur in the ordinary chondrite, Farmington. They contain the same phases present in the body of the meteorite, either as vug wall lining or as crystals attached to linings. The morphologies of these phases indicate a history of melting and vapor deposition.
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Large vugs occur in the ordinary chondrite, Farmington. They contain the same phases present in the body of the meteorite, either as vug wall lining or as crystals attached to linings. The morphologies of these phases indicate a history of melting and vapor deposition.
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Thermoluminescence Study of Ordinary Chondrites
AIP Conference Proceedings, 2009The mineral responsible for thermoluminescence (TL) in ordinary chondrites is mainly feldspar. Thermal metamorphism transferred feldspathic glass to feldspar. Then induced TL is useful tool for subtype classification in type 3 ordinary chondrites. Natural TL is also useful for identifying potentially paired fragments.
K. Ninagawa, Arnold Gucsik
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ASTEROIDAL SOURCE OF ORDINARY CHONDRITES*
Meteoritics, 1985The orbital evolution of asteroidal fragments with diameters ranging from 10 cm to 20 km, injected into the 3:1 Kirkwood gap at 2.50 A.U., has been investigated using Monte Carlo techniques. It is assumed that this material can become Earth‐crossing on a time scale of 106 years, as a result of a chaotic zone discovered by Wisdom, associated with the 3 ...
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Multiple parent bodies of ordinary chondrites
Earth and Planetary Science Letters, 1984Thermal histories of chondrite parent bodies are calculated from an initial state with material in a powder-like form, taking into account the effect of consolidation state on thermal conductivity. The very low thermal conductivity of the starting materials makes it possible for a small body with a radius of less than 100 km to be heated by several ...
Kiyoshi Yomogida, Takafumi Matsui
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Glass‐rich chondrules in ordinary chondrites
Meteoritics, 1994Abstract There are two types of glass‐rich chondrules in unequilibrated ordinary chondrites (OC): (1) porphyritic chondrules containing 55–85 vol% glass or microcrystalline mesostasis and (2) nonporphyritic chondrules, containing 90–99 vol% glass. These two types are similar in mineralogy and bulk composition to previously described Al‐rich chondrules ...
Alexander N. Krot, Alan E. Rubin
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Oxygen isotope studies of ordinary chondrites
Geochimica et Cosmochimica Acta, 1991Several stages in the evolution of ordinary chondritic meteorites are recorded in the oxygen isotopic composition of the meteorites and their separable components (chondrules, fragments, clasts, and matrix). The whole-rock isotopic compositions reflect the iron-group of the meteorite (H, L, or LL).
Robert N Clayton +3 more
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Significance of the unequilibrated ordinary chondrites
Journal of Geophysical Research, 1965Olivine compositions of thirteen olivine-hypersthene and olivine-bronzite chondrites, chosen for their apparent freedom from recrystallization, were determined with an electron microprobe. A parallel petrographic study of these samples, and five others in which Keil and Fredriksson found variable olivine compositions, was used to relate the extent of ...
Robert T. Dodd, Randall Van Schmus
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Metal formation in Ordinary Chondrite
2019Ordinary chondrites (OC) are undifferentiated meteorites, mainly composed of silicates, metal and sulfide, which underwent metamorphism due to 26 Al heating. It is commonly proposed that differentiated bodies have been formed by differentiation (i.e. metal silicate segregation) of early formed undifferentiated bodies.
Florin, G. +3 more
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Thermobarometry of ordinary chondrites
Doklady Earth Sciences, 2006N. G. Zinovieva +3 more
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CO3 Chondrites: Metamorphic Sequence and Interclassification with Ordinary Chondrites
2005Metamorphic grade of 7 CO chondrites is determined based on structural order of the Organic Matter. Petrographic types are attempted by interclassification with ordinary chondrites and are confronted with petrographic tracers.
Bonal, Lydie +4 more
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