formation of refractory inclusions by evaporation of
The geochemical behavior of refractory noble metals and
the evaporation and melting of primitive dust aggregates. This process would have been enhanced by (1) the possibility condensed from nebular vapor before formation of the Group II inclusions which were then isolated from nebular gas before the most volatile REE (Eu Yb) completely condensed. Refractory inclusions in C2 chondrites
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REFRACTORY PHASESmeteorite studies
refractory elements (proto-CAIs) initially crystallized from a melt following evaporation of nebular dust and gas in the earliest stages of solar system evolution inclusions are composed of an aggregate of compositionally similar proto-CAIs that were rapidly coagulated
Chat OnlineLinking molecular cloud collapse with formation of
Goldschmidt2019 Abstract Linking molecular cloud collapse with formation of refractory inclusions G.A. BRENNECKA 1 C. BURKHARDT1 G. BUDDE1 F. NIMMO2 T.S. KRUIJER3 T. KLEINE1 1University of Münster Germany ( brennecka gmail) 2University of California Santa Cruz USA 3Lawrence Livermore National Laboratory USA Our understanding of the stellar formation process and
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Refractory inclusions in the CH/CB-like carbonaceous
We suggest that Isheyevo as well as CH and CB chondrites consist of variable proportions of materials produced by different processes in different settings 1) by evaporation condensation and melting of dust in the protoplanetary disk (porphyritic chondrules and refractory inclusions) 2) by melting evaporation and condensation in an
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(PDF) Extremely Brief Formation Interval for Refractory
Extremely Brief Formation Interval for Refractory Inclusions and Uniform Distribution of 26Al in the Early Solar System. a kinetic evaporation-condensation model is used to show that type A
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Contemporaneous formation of chondrules and refractory
Jun 12 2003 · Contemporaneous formation of chondrules and refractory inclusions in the early Solar System. Itoh S(1) Yurimoto H. Author information (1)Department of Earth and Planetary Sciences Tokyo Institute of Technology Meguro Tokyo Japan. Comment in Nature. 2003 Jun 12423(6941) 691-2.
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Heating events in the nascent solar system recorded by
In the evaporation scenario the vapor produced by evaporation of an ultrarefractory component as described above was quantitatively condensed in a second generation of refractory inclusions that were subsequently reheated and lost the least refractory REEs (Eu and Yb) to the vapor.
Chat OnlineThe geochemical behavior of refractory noble metals and
the evaporation and melting of primitive dust aggregates. This process would have been enhanced by (1) the possibility condensed from nebular vapor before formation of the Group II inclusions which were then isolated from nebular gas before the most volatile REE (Eu Yb) completely condensed. Refractory inclusions in C2 chondrites
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Contemporaneous formation of chondrules and refractory
Jun 12 2003 · Evaporation condensation and melting of dusts by the flare heating form 16 O-rich CAIs. Chondrules form outward of the X-point where the precursor solids are immersed in 16 O-poor gas.
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Major element chemical and isotopic compositions of
Major element chemical and isotopic compositions of refractory inclusions in C3 chondrites The separate roles of condensation and evaporation L AWRENCE G ROSSMAN † D ENTON S. E BEL S TEVEN B. S IMON A NDREW M. D AVIS † F RANK M. R ICHTER and N IGEL M. P ARSAD
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Influence of Refractory-Steel Interfacial Reaction on the
The steel-refractory reaction also affected the composition of inclusions which will be discussed in the following section. 3.3. Effect of Steel-Refractory Reaction on the Inclusion Evolution Process. The relative fraction of inclusions in molten steel is shown in Fig. 13 according to reaction time at different Ce levels. Initial inclusion was
Chat OnlineThe role of acidity–basicity in evaporating refractory
Mar 12 2017 · When melts of Ca–Al inclusions in chondrites which are dominated by the oxides SiO2 MgO CaO and Al2O3 evaporate at high temperatures the SiO2 and MgO fugacities are inverted SiO2 which is more volatile than MgO becomes less volatile when melts rich in refractory CaO and Al2O3 evaporate. This fugacity inversion can be realistically explained within the framework of D.S.
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(PDF) Extremely Brief Formation Interval for Refractory
Extremely Brief Formation Interval for Refractory Inclusions and Uniform Distribution of 26Al in the Early Solar System. a kinetic evaporation-condensation model is used to show that type A
Chat OnlineThe Solar System™s Earliest Chemistry Systematics of
refractory inclusions or CAIs (calcium-aluminium– rich inclusions) which have played a pivotal role in concepts of solar system formation. CAIs are rich in refractory elements and attest to high-temperature processes in the solar nebula (Grossman 1980). They are viewed as the most primitive materials pro-
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Characterization of two atypical refractory inclusions
The atypical igneous type B2 refractory inclusion recovered from Allende (UAz 4A109.6) named Burnt Toast is encapsulated by a Mg deficient rim of consistent thickness around the entire inclusion. Evaporative loss of Mg to the nebula may explain the existence of this rim although parent body alteration secondary formation are possible or
Chat OnlineThe Effect of Jupiterʼs Formation on the Distribution of
The Effect of Jupiterʼs Formation on the Distribution of Refractory Elements and Inclusions in Meteorites Steven J. Desch1 Anusha Kalyaan1 and Conel M. O D. Alexander2 1 School of Earth and Space Exploration Arizona State University P.O. Box 871404 Tempe AZ USA 2 Department of Terrestrial Magnetism Carnegie Institution of Washington 5241 Broad Branch Road
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Formation of the First Solids in the Solar System (2011) 9099
Introduction Refractory inclusions (or calcium- aluminum-rich inclusions CAIs) and chondrules are by definition fractionated relative to bulk solar system composition by being enriched in refractory elements. Their volatility-controlled chemical compositions are almost certainly the result of partial condensation or evaporation.
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Formation of refractory inclusions by evaporation of
Jan 01 2002 · Abstract. Berman s (1983) activity-composition model for CaO-MgO-Al 2 O 3-SiO 2 liquids is used to calculate the change in bulk chemical and isotopic composition during simultaneous cooling evaporation and crystallization of droplets having the compositions of reasonable condensate precursors of Types A and B refractory inclusions in CV3 chondrites. The degree of evaporation of
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In situ formation of palisade bodies in calcium aluminum
Mefeorilics Pluneluty Science 32 61-70 (1997) 8 Meteoritical Society 1997.Printed in USA. In situ formation of palisade bodies in calcium aluminum-rich refractory inclusions STEVEN B. SIMON AND LAWRENCE GROSSMAN1.2 Department of the Geophysical Sciences The University of Chicago 5734 South Ellis Avenue Chicago IL 60637 USA
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(PDF) Elimination of inclusions and evaporation control
In the present work the formation of Nb rich inclusions in microstructure and evaporation of Al during melting of γ-TiAl based alloy (Ti-48Al-2Cr-2Nb-1B (at )) was studied. The results show that the inclusions cannot be removed even with a four-stage melting process when elemental Nb
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Impact of slag refractory lining reactions on the
IMPACT OF SLAG REFRACTORY LINING REACTIONS ON THE FORMATION OF INCLUSIONS 323 The samples were taken at three different positions schematically shown in Figure 2 (1) At the slag line on the side wall (2) At a position approximately 50 cm from the ladle bottom on the side wall (3) At the bottom of the ladle
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Formation of refractory inclusion by evaporation of
Download Citation Formation of refractory inclusion by evaporation of condensate precursors Berman s (1983) activity-composition model for CaO-MgO-Al2O3-SiO2 liquids is used to calculate the
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Refractory Inclusions in Chondritic Meteorites SpringerLink
Refractory inclusions comprise two kinds of objectsCa Al-rich inclusions (CAIs) and amoeboid olivine aggregates (AOAs). CAIs formed by aggregation of solids that resulted from evaporation (often incomplete) and condensation in a protoplanetary disk region with high ambient temperature (at or above condensation temperature of forsterite
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Influence of Refractory-Steel Interfacial Reaction on the
The steel-refractory reaction also affected the composition of inclusions which will be discussed in the following section. 3.3. Effect of Steel-Refractory Reaction on the Inclusion Evolution Process. The relative fraction of inclusions in molten steel is shown in Fig. 13 according to reaction time at different Ce levels. Initial inclusion was
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Refractory inclusions in the CH/CB-like carbonaceous
refractory inclusions) 2) by melting evaporation and condensation in an impact generated plume (magnesian cryptocrystalline and skeletal chondrules and metal grains some igneous CAIs could have been melted during this event) and 3) by aqueous alteration of pre-existing planetesimals (heavily
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Refractory inclusions in the CH/CB-like carbonaceous
refractory inclusions) 2) by melting evaporation and condensation in an impact generated plume (magnesian cryptocrystalline and skeletal chondrules and metal grains some igneous CAIs could have been melted during this event) and 3) by aqueous alteration of pre-existing planetesimals (heavily
Chat OnlineCorundum-bearing residues produced through the evaporation
Nevertheless such In principle therefore corundum-bearing refractory inclusions experimental data clearly provide an important reference point from such as BB-5 and GR.-I can originate through evaporation of a hi- which one may attempt to understand the origin of refractory inclu-
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Extremely Brief Formation Interval for Refractory
Calcium-aluminum-rich inclusions (CAIs) are millimeter-sized refractory objects commonly found in chondritic meteorites and are the oldest solids formed in our solar system. Primary CAI formation may have occurred through condensation and/or evaporation processes near the proto-Sun or alternatively during localized events in the asteroid belt.
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PII S(01) Formation of refractory
Abstract. Abstract—Berman s (1983) activity-composition model for CaO-MgO-Al2O3-SiO2 liquids is used to calcu-late the change in bulk chemical and isotopic composition during simultaneous cooling evaporation and crystallization of droplets having the compositions of reasonable condensate precursors of Types A and B refractory inclusions in CV3 chondrites.
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Contemporaneous formation of chondrules and refractory
Jun 12 2003 · Contemporaneous formation of chondrules and refractory inclusions in the early Solar System. Itoh S(1) Yurimoto H. Author information (1)Department of Earth and Planetary Sciences Tokyo Institute of Technology Meguro Tokyo Japan. Comment in Nature. 2003 Jun 12423(6941) 691-2.
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