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The evolution of chondrulesP(論文) The range of olivine compositions forming anomalous inclusions in chondrules suggests fractional condensation, as does the sequence of minerals in fine matrix particles. Chondrule bulk compositions vary in a random way as the precursors (condensates) were assembled heterogeneously.
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Constraining the cooling rates of chondrules
, 2016 Chondrules are up to mm-sized spherical melt droplets that are the main component in chondritic meteorites, constituting up to 80 vol %. They are products of widespread but poorly understood heating events in the early Solar System. Most chondrules have experienced complete or extensive melting, destroying much of what could be learned from the melting
Stockdale, Shannon +4 more
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The chemical composition of 61 individual Allende chondrules [PDF]
The abundances of 12 elements, Fe, A1, Na, Ni, Cr, Mn, Co, Ca, Sc, Ir, Sm and Eu have been determined by INAA in 61 individual chondrules (0.1-100 mg) separated from five Allende (C3) meteoritic fragments ( 25g).
Warren, Richard Gregory
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Chondrule Age Distribution and Rate of Heating Events for Chondrule Formation
Chondrule Age Distribution and Rate of Heating Events for Chondrule Formationidentifier:oai:t2r2.star.titech.ac.jp ...
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Annual Review of Earth and Planetary Sciences, 1997 ▪ Abstract Chondrules are ∼1-mm igneous droplets in primitive meteorites, and their abundance suggests widespread melting in the protoplanetary disk. Chondrules with relict unmelted grains or igneous rims record multi111ple melting events. There are two main types of chondrules, type I (FeO-poor and volatile-poor) and type II [FeO-rich and ...
Roger H. Hewins
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Meteoritics & Planetary Science, 2001 Abstract— Isotopic compositions and abundances of boron were measured in sixteen chondrules from seven chondrites by ion microprobe mass spectrometry. The chondrules are of the porphyritic, barred, and radial type and host meteorites include carbonaceous, ordinary, and enstatite chondrites.
Hoppe, P. +3 more
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Size‐frequency distributions of chondrules and chondrule fragments in LL3 chondrites: Implications for parent‐body fragmentation of chondrules [PDF]
Meteoritics & Planetary Science, 2002 Abstract— We measured the sizes and textural types of 719 intact chondrules and 1322 chondrule fragments in thin sections of Semarkona (LL3.0), Bishunpur (LL3.1), Krymka (LL3.1), Piancaldoli (LL3.4) and Lewis Cliff 88175 (LL3.8). The mean apparent diameter of chondrules in these LL3 chondrites is 0.80 φ units or 570 μm, much smaller than the previous ...
Victoria E. Nelson, Alan E. Rubin
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The evolution of chondrules [PDF]
Proceedings of the NIPR Symposium on Antarctic Meteorites, 1989 P(論文)The range of olivine compositions forming anomalous inclusions in chondrules suggests fractional condensation, as does the sequence of minerals in fine matrix particles. Chondrule bulk compositions vary in a random way as the precursors (condensates)
Hewins, Roger H.
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