2016 Fiscal Year Final Research Report
Asteroid collision history on the Moon based on silica high-pressure polymorph
| Project/Area Number |
26800277
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geochemistry/Cosmochemistry
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 月 / 隕石 / 高圧相 / アポロ試料 / シリカ / 衝撃変成 / 放射年代 / インパクト |
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| Outline of Final Research Achievements |
Asteroid collision history on the Moon was investigated using lunar surface rock samples (lunar meteorite, Apollo and Runa return samples) based on high-pressure science, mineralogy and isotope chronology. Lunar meteorite, Apollo and Runa return samples include several kinds of a high-pressure mineral besides shock-induced melting texture. Considering the stable pressure field of high-pressure minerals, shock pressure and impact speed were estimated 3-23 GPa and several km/second, respectively. We also tried to determine the impact ages using radio-isotopes.
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| Free Research Field |
隕石学
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