Chondrules in the Qingzhen type-3 enstatite chondrite: Possible precursor components and comparison to ordinary chondrite chondrules

Grossman, J. N.; Rubin, Alan E.; Rambaldi, E. R.; Rajan, R. S.; Wasson, J. T.

doi:10.1016/0016-7037(85)90149-8

Cited by 106 publications

(70 citation statements)

References 16 publications

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“…The chondrules in EL3 chondntes display a range of textures similar to those seen in the ordinary chondrites (Gooding and Keil,198 1) and in EH3 chondrites (Grossman et al, 1985;Ikeda, 1989). The PP chondrules are most abundant, with RP, POP, and G chondrules occurring less frequently, and C chondrules being relatively rare (Table 1; Fig.…”

Section: Resultsmentioning

confidence: 86%

“…NaZO) (Table 3). Grossman et al (1985) also found a high sodium content in the mesostasis of chondrules in EH chondrites (7-12 wtO? NazO).…”

Section: Resultsmentioning

confidence: 99%

“…In order to determine if the sodium difference in the mesostasis of the chondrules is due to diffusion of the sodium from the mesostasis to the surrounding silicates, we determined (Grossman et al, 1985), circles indicate Y-691 (Ikeda, 1988(Ikeda, ,1989, and triangles indicate PCA 91 238 (this work). Also shown is the size of the typical analytical uncertainty.…”

Section: Resultsmentioning

confidence: 99%

“…The appearance of small globules of Fe-metal and troilite in silicates in the EH3 chondrite Y-691 was reported by Ikeda (1989), where it was attributed to liquid immiscibility between silicate and metalsulfide melts. Alternatively, dusty metal has been reported in olivine of ordinary chondrites, where it was attributed to in situ (Grossman et al, 1985). The bulk Na20/A1203 composition of EH chondrules is greater than that of EL chondrules by about a factor of 2, reflected by a higher slope on the best-fit line.…”

Section: Comparison Of Chondrules From Eh and El Chondritesmentioning

confidence: 98%

“…These include an investigation of over 100 individual chondrules isolated from the Indarch (EH4) enstatite chondrite by , Leitch et al (1 982), and Smith et al (1 983). Rambaldi et al (1983) and Grossman et al (1985) examined relic grains, or precursor components, in the chondrules of Qingzhen, a highly unequilibrated EH3 chondrite. Ikeda (1 988, 1989) an intensive petrochemical study of over 100 chondrules in thm sections from the EH3 chondrite Yamato (Y)-69 1.…”

Section: Introductionmentioning

confidence: 99%

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Properties of chondrules in EL3 chondrites, comparison with EH3 chondrites, and the implications for the formation of enstatite chondrites

Schneider

Symes

Benoit

et al. 2002

Meteorit & Planetary Scien

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Abstract-The study of chondrules provides information about processes occurring in the early solar system. In order to ascertain to what extent these processes played a role in determining the properties of the enstatite chondrites, the physical and chemical properties of chondrules from three EL3 chondrites and three EH3 chondrites have been examined by optical, cathodoluminescence (CL), and electron microprobe techniques. Properties examined include size, texture, CL, and composition of both individual phases and bulk chondrules. The textures, distribution of textures, and composition of silicates of the EL3 chondrules resemble those of EH3 chondrules. However, the chondrules from the two classes differ in that (1) the size distribution of the EL chondrules is skewed to larger values than EH chondrules, (2) the enstatite in EL chondrules displays varying shades of red CL due to the presence of fine-grained sulfides and metal in the silicates, and (3) the mesostasis of EH chondrules is enriched in Na relative to that of EL chondrules. The similarities between the chondrules of the two classes suggest similar precursor materials, while the differences suggest that there was not a single reservoir of meteoritic chondrules, but that their origin was fairly local. The differences in the size distribution of chondrules in EH and EL chondrites may be explained by aerodynamic and gravitational sorting during accumulation of the meteoric material, while differences in CL and mesostasis properties may reflect differences in formation conditions and cooling rate following chondrule formation. We argue that our observations are consistent with the formation of enstatite chondrites in a thick dynamic regolith on their parent body.

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Section: Resultsmentioning

confidence: 86%

“…NaZO) (Table 3). Grossman et al (1985) also found a high sodium content in the mesostasis of chondrules in EH chondrites (7-12 wtO? NazO).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Comparison Of Chondrules From Eh and El Chondritesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%