Mn-Cr systematics of pallasites
文献类型：期刊论文
| 作者 | Hsu, WB |
| 刊名 | GEOCHEMICAL JOURNAL
 |
| 出版日期 | 2005 |
| 卷号 | 39期号:4页码:311-316 |
| 关键词 | pallasite short-lived nuclides Mn-Cr systematics ion microprobe early solar system |
| ISSN号 | 0016-7002 |
| 英文摘要 | I report here on a comprehensive ion microprobe study of Mn-Cr systematics of six pallasites. Four pallasites show excesses of radiogenic Cr-53 (Cr-53*), which correlate well with the Mn/Cr ratios. For these pallasites, the inferred initial (Mn-53/Mn-55). ratios are similar to 1 x 10(-5), which indicates that pallasites formed very early in the solar system. Eagle Station and Imilac show hints of Cr-53*, but the excesses are not resolved from terrestrial standards. Comparisons of Mn-Cr results with those of Pd-Ag indicate that these two short-lived radionuclide chronometers are self-consistent in pallasites. Inferred (Mn-53/Mn-55)(0) ratios in this study are generally higher than those previously observed by TIMS (1-3 x 10(-6)). It is not clear what mechanism caused such a discrepancy. Nevertheless, it should be noted that ion probe depends on the zoning profiles to give high Mn/Cr ratios at the edges of the olivine crystals. Thus, it dates the closure time of diffusive fractionation of Mn and Cr in pallasite olivines. |
| 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 ; COOLING RATES ; TIMESCALES ; CHRONOLOGY ; OLIVINE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000230862700002 |
| 公开日期 | 2012-03-07 |
| 源URL | [http://159.226.72.40/handle/332002/4134]  |
| 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.Purple Mt Observ, Lab Astrochem & Planetary Sci, 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. Mn-Cr systematics of pallasites[J]. GEOCHEMICAL JOURNAL,2005,39(4):311-316. |
| APA | Hsu, WB.(2005).Mn-Cr systematics of pallasites.GEOCHEMICAL JOURNAL,39(4),311-316. |
| MLA | Hsu, WB."Mn-Cr systematics of pallasites".GEOCHEMICAL JOURNAL 39.4(2005):311-316. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。