2010 Fiscal Year Final Research Report
Origin of oxygen isotopically anomalous material in carbonaceous chondrite
| Project/Area Number |
21740378
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kobe University |
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Principal Investigator |
SETO Yusuke Kobe University, 大学院・理学研究科, 助教 (10399818)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 隕石 / 同位体異常 / 電子顕微鏡 |
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| Research Abstract |
Chemistry and microstructure of the isotopically anomalous material (COS) in the carbonaceous chondrite Acfer 094 are studied using synchrotron-radiation X-ray diffraction (SR-XRD) and transmission electron microscopy (TEM). SR-XRD and TEM observations shows that COS grain consists of magnetite+pyrrhotite (+minor pentlandite) with a symplectitic texture in tens nm scale. Such a nano-metered inter-growth texture may suggest the simultaneous and rapid crystal growth of the constituent minerals at the time of formation.
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