| タイトル | Identification of the projectile at the Brent crater, and further considerations of projectile types at terrestrial craters |
| 著者（英） | Wolf, R.; Palme, H.; Grieve, R. A. F. |
| 著者所属（英） | Department of Energy, Mines|Chicago Univ.|Max-Planck-Inst. fuer Chemie |
| 発行日 | 1981-12-01 |
| 言語 | eng |
| 内容記述 | An analysis of impact melt samples from a drill hole at the Brent crater in Ontario for siderophile trace elements indicative of meteoritic contamination, has resulted in 823-857 m-deep basalt melt zone samples enriched in Ir, Os, Pd, Ni, Co, Cr and Se over basement. The abundance pattern suggests a chondritic projectile and, from a Ni-Cr correlation of 10 melt samples, an L or LL chondrite is inferred. Data from the Manicouagan, Mitastin, and Zhamanshin craters are also assessed, and large differences in siderophile element concentrations are found among the tektites which otherwise have similar chemical compositions. There are now four known craters formed by chondrites, with Brent being the smallest among them. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 82A20161 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/412253 |
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