• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Experimental study of mineral production in primodal solar nebula

Research Project

Project/Area Number 07640642
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

IISHI Kazuake  Facalty of Science, Dept.of Earth Sciences, Yamaguchi University Professor, 理学部, 教授 (60034716)

Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1995: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsC chondrite / Olivine / Plane defect / Aqueous alteration / Enstatite whisker / Interplanetary dust / Condasation experiment / ウイスカー状エンスタタイト / 惑星問塵 / かんらん石 / 面状析出物 / 原始星雲 / 輝石ウイスカー
Research Abstract

1. Reproduction experiments of (100) plane defects in olivine
Single crystals of Fa_<100>, Fa_<90>, Fa_<80>, Fa_<70>, and Fa_<60> in Fayalit-Forsterite solid solition were grown by TSFZ method. Thin sections (010) of about 15 mum thickness were hydrothermally altered at condition of 300゚C,0.1Kbar and HM buffer using HCl 1N or NaOH 1N solution. Planar precipitates were produced along (001) or (100) of olivine in acidic condition or alkaline condition, respectively. Oriented precipitates complexes were composed of hematite and amorphous silica in acidic condition and hematite and laihunite in alkaline condition. I explaned these results by cation leaching mechanism during olivine is altered in aqueous oxidizing environment. This result means that C chondrite was altered in alkaline oxidizing condition. I gave oral presentaiton on these results at Annual Meeting of Mineralogical Society of Japan and published them in the International Journal of Physics and Chemistry of Minerals.
2. Reprodu … More ction experiments of enstatite whiskers which are elongated in a-axis
Enstatitet whiskers which are elongated in the crystallogaraphic a-axis were produced only a few, but surely, at 25mmHg, at condensation temperature of 1150 ゚C-1100 ゚C and in the duration time of 10 minutes. None was condensated at the temperature higher than 1150 ゚C,and enstatite whiskers elongated in c-axis was condensated alone at lower temperature than 1100゚C.Enstatite whiskers elongated in a-axis can grow in some probability at high supersaturation (high temperature) because crystal can growth at any direction in these conditions. However, enstatite whiskers elongated only in c-axis grow at low supersaturation (low temperature), because only these whiskers which is the highest crystal growth rate at low temperature can grow. On the other hand, inverted twins were found in the enstatite whiskers elongated in a-axis produced in this experiment. Threfore, these enstatite whiskers might be grown in the protoenstatite stable region, while enstatite whiskers found in interplanetary dust are clinoenstatite without inverted twins, which must be grown metastably at low temperature. Less

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] Kazuake Iishi: "Stability of high clinoenstatite" Neues Jahrbuch fur Mineralogie Monatshefte. 1995. 65-74 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazuake Iishi: "Planar defects in iron-rich olivines produced experimentally in aqueous oxidizing environment" Physics and Chemistry of Minerals. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Ishii: "Stability of high clinoenstatite" Neues Jahrbuch fur Mineralogie Monatshefte. 1995, H.2. 65-74 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Iishi: "Oriented precipitate complexes iniron-rich olivines produced experimentally in aqueous oxidizing environment" Physics and Chemistry of Minerals. (in print). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kazuake Iishi: "Stability of high clinoenstatite" Neues Jahrbuch fur Mineralogie Monatshefte. 1995. 65-74 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kazuake Iishi: "Planar defects in iron-rich olivines produced experimentally in aqueous oxidizing environment" Physics and Chemistry of Minerals. (印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Iishi and K.Kitayama: "Stability of high clinoenstatite" Nenes Jahrbuch fur Mineralogie Monatshefte. 1995. 65-74 (1995)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1995-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi