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Discovery of 17,18 O-rich material from meteorite by direct-imaging method using stigmatic-SIMS and 2D ion detector
| Title: | Discovery of 17,18 O-rich material from meteorite by direct-imaging method using stigmatic-SIMS and 2D ion detector |
| Authors: | Sakamoto, Naoya Browse this author | | Itoh, Shoichi Browse this author | | Yurimoto, Hisayoshi Browse this author |
| Keywords: | Direct-imaging | | Stigmatic-SIMS | | Ion detector | | Oxygen isotope | | Meteorite | | Solar System |
| Issue Date: | 15-Dec-2008 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Applied Surface Science |
| Volume: | 255 |
| Issue: | 4 |
| Start Page: | 1458 |
| End Page: | 1460 |
| Publisher DOI: | 10.1016/j.apsusc.2008.05.052 |
| Abstract: | We report a discovery of a chemically and isotopically unique material distributed ubiquitously in fine-grained matrix of a primitive carbonaceous chondrite Acfer 094. The observations were made in situ using a novel high precision imaging technique adopted direct-imaging method. The material is extremely enriched in heavy oxygen isotopes of O-17 and O-18 of +18% relative to the Earth's ocean while previously reported variation of oxygen isotopes is as large as a range from -8% to 0%. Based on the unique chemical composition of the material, the abundance of the material in the meteorite matrix is calculated to be 94 ± 20 (σ) ppm by volume using elemental mapping with a 7 μm2 spatial resolution by FE-SEM-EDS on the meteorite thin section. The average size of identified materials is 5 x 5 x 5 μm3. Therefore, isotope imaging capability over 500 x 500 μm2 area with micron resolution and an isotopic ratio precision of 1 percent is required to investigate about the presence of such material. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/38751 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 圦本 尚義
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