2014 Fiscal Year Final Research Report
FORMATION PROCESS OF PLANETARY MATERIAL IN THE COLD NEBULA DECIPHERED FROM ISOTOPE IMAGING OF METEORITE ORGANIC MATTER
Project/Area Number |
23654191
|
Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
Allocation Type | Multi-year Fund |
Research Field |
Geochemistry/Astrochemistry
|
Research Institution | Osaka University |
Principal Investigator |
HASHIZUME KO 大阪大学, 理学(系)研究科(研究院), 助教 (90252577)
|
Project Period (FY) |
2011-04-28 – 2015-03-31
|
Keywords | 隕石有機物 / 同位体 / 硫黄 / 酸素 / イメージング / 非質量依存同位体分別 |
Outline of Final Research Achievements |
Using the isotope imaging technique of sulfur by a secondary ion mass spectrometer, sulfur isotope analyses of organic matter extracted from a primitive meteorite was performed. In the studied sample, large oxygen non-mass-dependent isotope anomalies were previously reported in its organic matter. In the organic matter sample extracted from the carbonaceous chondrite, two micron-sized sulfur-isotope hotspots with 33S/32S and 34S/32S anomalies up to 3.4% and 4.4%, respectively, were observed. This result suggests presence of a large non-mass-dependent sulfur isotope fractionation in meteoritic organic matter.
|
Free Research Field |
宇宙地球化学
|