Major element chemical and isotopic compositions of refractory inclusions in C3 chondrites: the separate roles of condensation and evaporation

Grossman, Lawrence; Ebel, D. S.; Simon, S. B.; Davis, A. M.; Richter, Frank M.; Parsad, Nigel M.

doi:10.1016/s0016-7037(00)00396-3

Cited by 132 publications

(210 citation statements)

References 19 publications

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“…Isotopic compositions of these elements were fractionated (1.0 to 2.9 ‰/amu for Si and 4.6 to 9.6 ‰/amu for Mg) relative to terrestrial values. These fractionations are similar to those reported for bulk CAIs (Clayton et al, 1988) and suggest that coarsegrained CAIs were formed by evaporative loss of some Si and Mg from high-temperature condensates as proposed by Grossman et al (2000). No significant zoning of isotopic fractionations was observed in these CAIs.…”

supporting

confidence: 88%

“…Si and Mg isotopic fractionations in coarse-grained calcium-aluminum-rich inclusions (CAIs) are indicators of evaporation processes experienced by CAIs (Clayton et al, 1988;Davis et al, 1990;Grossman et al, 2000). Si and Mg isotopic fractionations (up to ~5 ‰/amu for Si and ~11 ‰/amu for Mg) have been reported for bulk CAIs (Clayton et al, 1988 and references therein).…”

Section: Introductionmentioning

confidence: 99%

“…Si and Mg isotopic fractionations (up to ~5 ‰/amu for Si and ~11 ‰/amu for Mg) have been reported for bulk CAIs (Clayton et al, 1988 and references therein). Grossman et al (2000) showed that most type B CAIs were depleted in Si and Mg relative to high-temperature condensates from the nebula and suggested that isotopic fractionations resulted from evaporative loss of these elements from condensates.…”

Section: Introductionmentioning

confidence: 99%

“…Si isotopic fractionations, when measured together with Mg isotopic fractionation, may provide valuable information on the temperature during the evaporation process and also Si concentrations in the melt (Grossman et al, 2000). Reports of Si isotope fractionations measured by secondary ion mass spectrometry (SIMS) are rare (e.g., Davis et al, 1991;Clayton et al, 1984).…”

mentioning

confidence: 99%

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Si and Mg isotope fractionations in melilite in coarse-grained CAIs measured by SIMS

et al. 2004

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Si and Mg isotopic compositions of melilite in three coarse-grained CAIs were measured by SIMS. Isotopic compositions of these elements were fractionated (1.0 to 2.9 ‰/amu for Si and 4.6 to 9.6 ‰/amu for Mg) relative to terrestrial values. These fractionations are similar to those reported for bulk CAIs (Clayton et al., 1988) and suggest that coarsegrained CAIs were formed by evaporative loss of some Si and Mg from high-temperature condensates as proposed by Grossman et al. (2000). No significant zoning of isotopic fractionations was observed in these CAIs. This suggests that the evaporative loss of these elements from CAIs were slow compared with diffusive homogenization and also suggests that evaporative loss ceased early before crystallization of Mg-rich melilite.

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supporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Si and Mg isotope fractionations in melilite in coarse-grained CAIs measured by SIMS

et al. 2004

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“…This leads to temperatures well above 2000 K, which are necessary for Type B CAIs [15] and barred olivine textures [16].…”

Section: Short Circuitsmentioning

confidence: 99%

The Short Circuit Instability in Protoplanetary Disks: Processing high temperature minerals

Hubbard

McNally

Low

et al. 2013

EPJ Web of Conferences

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Abstract. We introduce a magneto-hydrodynamic instability which occurs, among other locations, in the inner, hot regions of protoplanetary disks, and which alters the way in which resistive dissipation of magnetic energy into heat proceeds. This instability can be likened to both an electrical short circuit and lightning, as it concentrates the dissipation of magnetic energy by means of the enhanced release of free electrons. This instability can generate very high temperatures, making it an excellent candidate for thermally processing protoplanetary disk solids, from annealing silicates to melting chondrules or even CAIs.

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Timing of Nebula Processes That Shaped the Precursors of the Terrestrial Planets

Chaussidon¹,

Liu²

2015

The Early Earth

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Major element chemical and isotopic compositions of refractory inclusions in C3 chondrites: the separate roles of condensation and evaporation

Cited by 132 publications

References 19 publications

Si and Mg isotope fractionations in melilite in coarse-grained CAIs measured by SIMS

Si and Mg isotope fractionations in melilite in coarse-grained CAIs measured by SIMS

The Short Circuit Instability in Protoplanetary Disks: Processing high temperature minerals

Timing of Nebula Processes That Shaped the Precursors of the Terrestrial Planets

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