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  FeO-rich silicates and Ca, Al-rich inclusions in Qingzhen and Yamato 691 (EH3) meteorites: Evidence for migration of mass in the solar nebula

Lin, Y. T., Ouyang, Z. Y., & El Goresy, A. (2002). FeO-rich silicates and Ca, Al-rich inclusions in Qingzhen and Yamato 691 (EH3) meteorites: Evidence for migration of mass in the solar nebula. Chinese Science Bulletin, 47(2), 150-153.

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Genre: Journal Article
Alternative Title : Chin. Sci. Bull.

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 Creators:
Lin, Y. T., Author
Ouyang, Z. Y., Author
El Goresy, A.1, Author              
Affiliations:
1Cosmochemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826294              

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Free keywords: solar nebula; meteorite; enstatite chondrite; reduction; migration
 Abstract: The Qingzhen and Yamato 691 (EH3) enstatite chondrites, which formed under extremely reducing conditions, are studied using the scanning electron microscope and electron probe microanalyzer. Both meteorites contain FeO-rich silicates and minor Ca, Al-rich inclusions. Most FeO-rich silicates are Ca- poor pyroxenes and occur as fragments in matrix. A few grains of FeO-rich silicates were found in chondrules, and FeO-rich olivine is rare. In Qingzhen, FeO-rich silicates commonly contain abundant dust-like Ni-poor metals, which probably formed through reduction of FeO. In contrast, only a few fragments of FeO-rich silicates in Yamato 691 enclose dust-like metals. This difference is consistent with a more reducing condition of Qingzhen than Yamato 691. Ca, Al-rich inclusions have similar modal compositions and mineral chemistry as their counterparts in carbonaceous chondrites. We suggest that (1) the FeO-rich silicates probably formed in oxidized regions of the solar nebula, and then moved into the enstatite chondrite locations; and (2) Ca, Al-rich inclusions in both enstatite chondrites and carbonaceous chondrites may have similar origins and reservoirs.

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Language(s): eng - English
 Dates: 2002-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 668226
ISI: 000174261900017
 Degree: -

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Title: Chinese Science Bulletin
  Alternative Title : Chin. Sci. Bull.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 47 (2) Sequence Number: - Start / End Page: 150 - 153 Identifier: ISSN: 1001-6538