The distribution and geochemistry of platinum-group elements as event markers in the Phanerozoic
文献类型：期刊论文
| 作者 | Evans, NJ; Chai ZF(柴之芳) ; Chai, CF
|
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 1997 |
| 卷号 | 132期号:1-4页码:373-390 |
| 关键词 | platinum-group elements Cretaceous-Tertiary boundary Phanerozoic event horizon |
| 通讯作者 | CALTECH, DIV GEOL & PLANETARY SCI, PASADENA, CA 91125 USA ; CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING 100080, PEOPLES R CHINA |
| 英文摘要 | The discovery of the platinum-group element (PGE) enrichment in the Cretaceous-Tertiary (K-T) boundary impact layer popularized the use of PGEs as geochemical event markers and prompted an explosion of interest in these elements whose geochemical behavior is poorly understood. Instead of concentrating on the more easily analyzed PGEs (e.g., iridium), many studies now include the entire group. Analytical methods have been improved to the point where small samples (less than or equal to 5 g) can be analyzed confidently at the sub-ppb level, allowing the determination of the distribution of PGEs in the oceans, atmosphere and biosphere, The presence or absence of a PGE anomaly is often used as a criterion for determining whether an event horizon is impact-related, however, to date, only the K-T boundary yields a distinct PGE anomaly with positive interelement correlations and solar interelement ratios. Terrestrial sources such as volcanic emissions are also being investigated as potential contributors to PGE anomalies at other Phanerozoic event horizons. Primary signatures (e.g., interelement ratios), characteristic of the PGE source, may be altered during various high and;or low temperature processes. For example, fractionation during impact melting, vaporization/condensation, remobilization, redistribution and diagenesis can obscure original signatures and make determination of the PGE source difficult, Future research might be directed towards establishing the behavior of the PGEs during such processes. (C) 1997 Elsevier Science B.V. |
| 学科主题 | Physical Geography; Geology; Paleontology |
| 类目[WOS] | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
| 研究领域[WOS] | Physical Geography ; Geology ; Paleontology |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1997XY80500024 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/237218]  |
| 专题 | 高能物理研究所_院士 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Evans, NJ,Chai ZF,Chai, CF. The distribution and geochemistry of platinum-group elements as event markers in the Phanerozoic[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,1997,132(1-4):373-390. |
| APA | Evans, NJ,柴之芳,&Chai, CF.(1997).The distribution and geochemistry of platinum-group elements as event markers in the Phanerozoic.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,132(1-4),373-390. |
| MLA | Evans, NJ,et al."The distribution and geochemistry of platinum-group elements as event markers in the Phanerozoic".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 132.1-4(1997):373-390. |
入库方式： OAI收割
来源：高能物理研究所
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