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Showing 1 to 8 of 8 for “"Chondrule"”.
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XCT, SEM, and LA-ICP-MS map investigation of chondrule FGRS in CM2 Aguas Zarcas
… We performed shape and volume analyses of chondrule cores and FGRs using XCT. LA-ICP-MS analysis was also conducted on one calcium-aluminum-rich inclusion (CAI) to compare trace element patterns with non-CAIs. FGRs in AZ most likely formed in either a single reservoir of weakly turbulent …
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A 3-D tomographic survey of compound chondrules in two carbonaceous chondrites : Acfer 139 and Renazzo
Compound chondrules (CCs) are two or more chondrules fused or mechanically joined together. Studies of compound chondrules have been conducted in order to understand the chondrule formation process, including the environment and precursor materials. Chondrule formation is still not currently …
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Formation conditions of plagioclase-bearing type I chondrules in CO chondrites : a study of natural samples and experimental analogs
… One of the components found in chondrites is chondrules, which are small igneous spherules that formed from the melting of precursor dust ball assemblages during very short, high-temperature events in the solar nebula. Chondrules typically contain olivine and pyroxene, a glassy mesostasis, …
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Mineralogy and bulk chemistry of chondrules and matrix in petrologic type 3 chondrites : implications for early solar system processes
… electron microprobe (EMP) study was performed on chondrules of various textural types in four petrologic type 3 chondrites: MET 00526 (L3.05), MET 00426 (CR3.0), Kainsaz (CO3.2) and Kakangari (K3). Bulk compositions of twenty chondrules in each meteorite were determined with modal recombination …
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Classification of a Meteorite found near Colgate, North Dakota
… 0.72, the total metallic Fe is 19.8%,the average chondrule diameter is 0.3 mm, and the Fa composition is 20.27 mol%. The meteorite also has a crystalline matrix, with mostly well segregated chondrules, little igneous glass, and olivine grain homogeneity with less than 5% average deviation. With …
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Paleomagnetic Investigation of Enstatite Chondrite Chondrules: Implications for the Solar Nebula
… ∼3-7 AU. Previous work on two dusty olivine chondrules from high iron enstatite chondrites with variable kamacite grain sizes implied strong inner nebular field (∼1-2 AU) intensities of 185 ± 111 µT and 299 ± 247 µT. One new dusty olivine chondrule, containing exclusively submicron kamacite …
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A TEM study of crystalline silicates in the matrices of MET 00426 and QUE 99177 CR3.0 chondrites: Constraints on the formation mechanisms of dust in the solar nebula
… annealing prior to accretion. Our data discount chondrule fragmentation as a significant source of the fine-grained matrix olivines. Although these chondrites have similar matrix mineralogy and chemistry, FeO-bearing crystalline silicates are more common in MET 00426 matrix than in QUE 99177, …
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Generating A Characterization Method Utilizing The Visible (0.6-1.0 μm) Peak Feature To Aid In Identification Of Ordinary Chondrite Parent Bodies
<p>Surveys in the visible to near infrared (VNIR) of main belt asteroids which cut off at the 1 micron wavelength prevent adequate characterization for approximately 2500 asteroids. This project aims at surveying spectral data from RELAB and Gaffey's meteorite datasets utilizing the peak feature …