Minor element zoning and trace element geochemistry of pallasites
文献类型：期刊论文
| 作者 | Hsu, WB |
| 刊名 | METEORITICS & PLANETARY SCIENCE
 |
| 出版日期 | 2003-08-01 |
| 卷号 | 38期号:8页码:1217-1241 |
| 关键词 | EARLY SOLAR-SYSTEM IRON-METEORITES ION MICROPROBE COOLING RATES RARE-EARTH OLIVINE MESOSIDERITES DIFFUSION PETROLOGY ORIGIN |
| ISSN号 | 1086-9379 |
| 英文摘要 | I report here on an ion probe study of minor element spatial distributions and trace element concentrations in six pallasites. Pallasite olivines exhibit ubiquitous minor element zoning that is independent of grain size, morphology, and adjacent phases. Ca, Cr, Ti, V, and Ni concentrations decrease from center to rim by factors of up to 10, while Mn is generally unzoned or increases slightly at the very edge of some olivine grains. The maximum concentrations of these elements at the center of olivine vary from grain to grain within the same meteorite and among the pallasites studied. These zoning profiles are consistent with thermal diffusion during rapid cooling. The inferred cooling rates at high temperature regimes are orders of magnitude faster than the low-temperature metallographic cooling rates (similar to0.5 to 2degreesC/Ma). This suggests that pallasites, like mesosiderites, have experienced rather complicated thermal histories, i.e., cooling rapidly at high temperatures and slowly at low temperatures. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Geochemistry & Geophysics |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | EARLY SOLAR-SYSTEM ; IRON-METEORITES ; ION MICROPROBE ; COOLING RATES ; RARE-EARTH ; OLIVINE ; MESOSIDERITES ; DIFFUSION ; PETROLOGY ; ORIGIN |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000186652800007 |
| 公开日期 | 2012-08-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/4626]  |
| 专题 | 紫金山天文台_天体化学和行星科学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA |
| 推荐引用方式 GB/T 7714 | Hsu, WB. Minor element zoning and trace element geochemistry of pallasites[J]. METEORITICS & PLANETARY SCIENCE,2003,38(8):1217-1241. |
| APA | Hsu, WB.(2003).Minor element zoning and trace element geochemistry of pallasites.METEORITICS & PLANETARY SCIENCE,38(8),1217-1241. |
| MLA | Hsu, WB."Minor element zoning and trace element geochemistry of pallasites".METEORITICS & PLANETARY SCIENCE 38.8(2003):1217-1241. |
入库方式： OAI收割
来源：紫金山天文台
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