| GRV 051523： A new eucrite |
| |
| 引用本文： | 刘焘,林杨挺,胡森,冯璐.GRV 051523： A new eucrite[J].极地研究(英文版),2009,20(2):200-208. |
| |
| 作者姓名： | 刘焘 林杨挺 胡森 冯璐 |
| |
| 作者单位： | [1]Guangzhou Institute of Geochemistry, Chinese Academy of Science, Gnangzhou 510640, China [2]Graduate School of Chinese Academy of Sciences, Beijing 100049, China [3]Key Laboratory of the Study of Earth＇ s Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Science, Beijing 100029, China |
| |
| 基金项目： | The sample was provided by the Polar Research Institute of China. This work is supported by the Knowledge-Innovation Program （ kzcx2-yw-110, KZCX2-YW- Q08） and One-Hundred-Talent Program of the Chinese Academy of Sciences. |
| |
| 摘 要： |
|
| 关 键 词： | 南极 不透明矿物 格罗夫山 冲击事件 化学成分 岩浆分异 铬铁矿 灶神星 |
GRV 051523: A new eucrite |
| |
| Liu Tao,Lin Yangting,Hu Sen,Feng Lu.GRV 051523: A new eucrite[J].Chinese Journal of Polar Science,2009,20(2):200-208. |
| |
| Authors: | Liu Tao Lin Yangting Hu Sen Feng Lu |
| |
| Institution: | [1]Guangzhou Institute of Geochemistry, Chinese Academy of Science, Gnangzhou 510640, China [2]Graduate School of Chinese Academy of Sciences, Beijing 100049, China [3]Key Laboratory of the Study of Earth＇ s Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Science, Beijing 100029, China |
| |
| Abstract: | Grove Mountains (GRV) 051523 is a newly identified eucrite, consisting mainly of coarse-grained pyroxene (62.9 vol%) and plagioclase (34.2 vol%), with less abundant opaque minerals (2.7 vol%), minor silica and tiny FeO-rich olivine (Fa75). Coarse-grained pyroxenes show exsolution of augite lamellae in pigeonite or vice versa. Width of most exsolution lamellae in pyroxenes is 1-3 μm. Opaque minerals are mainly chromite, ilmenite and sulfides. The meteorite was heavily shocked, as indicated by breccias and melt veins. Coarse-grained pyroxenes commonly contain abundant tiny or needle-like chromite inclusions with orientation, probably due to heavy shock events. Pyroxenes in various petrographic occurrences exhibit highly homogeneous compositions, indicating that GRV 051523 experienced intense thermal metamorphism in the parent asteroid 4 Vesta. GRV 051523 is classified as Type 5-6. This new eucrite will have additional constraints on chemical composition, magmatic differentiation, multi-stage shock and thermal history of Vesta. |
| |
| Keywords: | meteorite eucrite Antarctic meteorite thermal metamorphism Vesta |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
