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Ca‐, Al‐rich Inclusions in Three New Carbonaceous Chondrites from the Grove Mountains, Antarctica: New Evidence for a Similar Origin of the Objects in Various Groups of Chondrites
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Abstract Three new carbonaceous chondrites (GRV 020025, 021579 and 022459) collected from the Grove Mountains (GRV), Antarctica, have been classified as the CM2, CO3 and CV3 chondrites, respectively. A total of 27 Ca‐ and Al‐rich inclusions have been found in the three meteorites, which are the earliest assemblages formed in the solar nebula. Most of the inclusions are intensively altered, with abundant phyllosilicates in the inclusions from GRV 020025 and FeO enrichment of spinel in those from GRV 022459. Fxcept for one spinel‐spherule in each of GRV 020025 and 021579, all the inclusions can be classified as Type A‐like or spinel‐pyroxene‐rich inclusions, and they probably represent the continuum of solar nebular condensation. In addition, most of the inclusions in these meteorites share much similarity in both petrography and mineral chemistry, suggesting a similar origin of Ca‐Al‐rich inclusions in various chondrites.
Title: Ca‐, Al‐rich Inclusions in Three New Carbonaceous Chondrites from the Grove Mountains, Antarctica: New Evidence for a Similar Origin of the Objects in Various Groups of Chondrites
Description:
Abstract Three new carbonaceous chondrites (GRV 020025, 021579 and 022459) collected from the Grove Mountains (GRV), Antarctica, have been classified as the CM2, CO3 and CV3 chondrites, respectively.
A total of 27 Ca‐ and Al‐rich inclusions have been found in the three meteorites, which are the earliest assemblages formed in the solar nebula.
Most of the inclusions are intensively altered, with abundant phyllosilicates in the inclusions from GRV 020025 and FeO enrichment of spinel in those from GRV 022459.
Fxcept for one spinel‐spherule in each of GRV 020025 and 021579, all the inclusions can be classified as Type A‐like or spinel‐pyroxene‐rich inclusions, and they probably represent the continuum of solar nebular condensation.
In addition, most of the inclusions in these meteorites share much similarity in both petrography and mineral chemistry, suggesting a similar origin of Ca‐Al‐rich inclusions in various chondrites.
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