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2001 Fiscal Year Final Research Report Summary

Petrological Study of Martian Meteorites

Research Project

Project/Area Number 10440149
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionIBARAKI UNIVERSITY

Principal Investigator

IKEDA Yukio  IBARAKI UNIV., Dept, of Material Science & Biology, Professor, 理学部, 教授 (90114008)

Project Period (FY) 1998 – 2001
KeywordsMartian Meteorites / Magmatic Inclusions / Kaersutite / Cumulative Meteorites / Basaltic Meteorites / Shergottites
Research Abstract

The petrological study on Martian meteorites was carried out in details. Especially it was stressed to investigate the occurrence and to clarify the genesis of magmatic inclusions that occur in Martian cumulative and basaltic shergottites. Magmatic inclusions in Martian meteorites are very small with about 10-100 micrometers across, and occur in phenocrystic minerals (olivine and pyroxene). They consist mainly of olivine, fassaite, plagioclase, a silica mineral, or Kaersutite in addition to igneous glass, and are very important because they have direct information on their parent magmas and formational conditions. Two lherzolitic (cumulative) shergottites (ALH77005 and Yamato-793605) have a nearly same mineral assemblage, although the two show slightly different lithologies. They may have been produced from Martian parent magmas that have chemical compositions similar to a typical basaltic meteorite (the shergotty meteorite). It was also clarified that magmatic inclusions occurring in olivine in the lherzolitic meteorites are different in mineral assemblages and mineral compositions from those in pyroxene. This difference may be due to their different stages of magmatic fractional crystallization. Kaersutite was found o to occur in the two lherzolitic shergottites, and the water vapor pressure of their coexisting magmas was estimated to be less than 1 kilo bars. Magmatic inclusions in basaltic shergottites (DaG735, and so on) also were surveyed in details. They differ in mineral assemblage from those in the lherzolitic shergottites, and seem to have crystallized on a meta-stable condition. The DaG735 may have formed as a cumulative basaltic lithology, which contains a large number of phenocrystic olivine in a basaltic melt.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Ikeda Y. et al.: "Magmatic Inclusions and Felsic Clasts in The Dar al Gani 319 Polymict Ureilite"Meteoritics and Planetary Science. 36. 481-499 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda Y. et al.: "Lithic and Mineral Clasts in The Daral Gani (DAG) 319 Polymict Ureilite"Antarctic Meteorite Research. 13. 177-221 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda Y. et al.: "Petrology of the Asuka-881931 Ureilite with Special Reference to Crys tallization of Interstitial Silicate Melt"Meteoritics and Planetary Science. 34. 625-636 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda Y. et al.: "Petrology of Magmatic Silicate Inclusions in the ALH-77005 Martian Lherzolitic Shergottite"Meteoritics and Planetary Science. 33. 803-812 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda Y. et al.: "Petrology and Chemistry of the Miles II E Iron I : Description and Petrology of Twenty New Silicate Inclusions"Antarctic Meteorite Research. 10. 355-372 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda Y. et al.: "Petrology and Mineralogy of the Yamato-793605 Martian Meteorite"Antarctic Meteorite Research. 10. 13-40 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ikeda Y. and Prinz M.: "Magmatic Inclusions and Felsic Clasts in The Dar al Gani 319 Polymict Ureilite."Meteoritics and Planet. Science. Vol. 36, No. 4. 481-499 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda Y. Prinz M. and Nehru C.E.: "Lithic and Mineral Clasts in The Dar al Gani (DAG) 319 Polymict Ureilite"Antarctic Meteorite Research. No. 13. 177-221 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda Y.: "Petrology of the Asuka-881931 Ureilite with Special Reference to Crystallization of Interstitial Silicate Melt"Meteoritics and Planet. Science. Vol. 34, No. 4. 625-636 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda Y.: "Petrology of Magmatic Silicate Inclusions in The ALH - 77005 Martian Lherzolitic Shergottite."Meteoritics and Planet. Science. Vol.33, No. 4. 803-812 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura M. and Ikeda Y.: "Hydrous and Anhydrous Alteration of Chondrules in Kaba and Mokoia CV Chondrites."Meteoritics and Planet. Science. Vol. 33, No. 5. 1139-1146 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda Y., Ebihara M., and Prinz M.: "Petrology and Chemistry of the Miles IIE Iron I: Description and Petrology of Twenty New Silicate Inclusions."Antarctic Meteorite Research. Vol. 10. 355-372 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ebihara M., Ikeda Y., and Prinz M.: "Petrology and Chemistry of the Miles IIE Iron II: Chemical Characteristics of the Miles Silicate Inclusions"Antarctic Meteorite Research. Vol. 10. 373-388 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ikeda Y.: "Petrology and Mineralogy of the Yamato-793605 Martian Meteorite."Antarctic Meteorite Research. Vol. 10. 13-40 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] IkedaY., Yamamoto T., Kojima H., Imae N., Kong P., Ebihara M., and Prinz M.: "Yamato-791093, A Metal-sulfide-Enriched H-group Chondritic Meteorite Transitional to Primitive IIE Irons with Silicate Inclusions."Antarctic Meteorite Research. Vol. 10. 335-353 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura M. and Ikeda Y.: "Comparative Study of Anhydrous Alteration of Chondrules in Reduced and Oxidized CV Chondrites."Antarctic Meteorite Research. Vol. 10. 191-202 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Nobuyoshi Y, Haramura H., Ikeda Y., Kimura M., Kojima H., Imae N., and Lee M. S.: "Comparative Study on the Major Element Chemical Compositions of Antarctic Chondrites to Those of Non-Antarctic Falls with Reference to Terrestrial Weathering"Antarctic Meteorite Research. Vol. 10. 165-180 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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