New radiometric dating of the dykes from the Hurd Peninsula, Livingston Island, South Shetland Islands
文献类型：期刊论文
| 作者 | Zheng, X; Kamenov, B; Sang, H; Monchev, P |
| 刊名 | JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
 |
| 出版日期 | 2003-03-01 |
| 卷号 | 15期号:8页码:925-934 |
| 关键词 | K-Ar and Ar-40/Ar-39 dating dykes Livingston Island Antarctica |
| ISSN号 | 0895-9811 |
| 文献子类 | Article |
| 英文摘要 | Fifteen new K-Ar ages in the range of 79-31 Ma are partially confirmed by three Ar-40/Ar-39 plateaus and isochron data of 64.9 +/- 0.4, 55.5 +/- 0.1 and 52.8 +/- 0.6 Ma. The new geochronological data reveal a much more detailed picture of the subduction imprint in the Hurd Peninsula. Using cutting relationships, the dyke emplacement history is divided into four episodes. The Late Cretaceous-Paleocene dykes in the range of 80-60 Ma are related to the main magmatism in Livingston Island and most likely reflect the final stages of subduction of the proto-Pacific oceanic crust. The Early Eocene dykes (56-52 Ma) fill the gap in volcanic activity 70-50 Ma ago. They are the only magmatic event manifested at this time in the region. The 45-42 Ma dykes may be related to the intrusion of the Barnard Point tonalite. Three samples of Oligocene age appear to represent the last igneous activities on the Hurd Peninsula prior to the opening of the Bransfield Strait. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| WOS关键词 | ANTARCTIC PENINSULA ; MAGMATISM ; AGE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000183100700008 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78273]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zheng, X |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, LTE, Beijing 100029, Peoples R China 2.Sofia Univ St Kliment Ohridski, Dept Geol & Geog, Sofia 1000, Bulgaria 3.Geol & Geophys Co, Geochronol Lab, Sofia 1797, Bulgaria |
| 推荐引用方式 GB/T 7714 | Zheng, X,Kamenov, B,Sang, H,et al. New radiometric dating of the dykes from the Hurd Peninsula, Livingston Island, South Shetland Islands[J]. JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,2003,15(8):925-934. |
| APA | Zheng, X,Kamenov, B,Sang, H,&Monchev, P.(2003).New radiometric dating of the dykes from the Hurd Peninsula, Livingston Island, South Shetland Islands.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,15(8),925-934. |
| MLA | Zheng, X,et al."New radiometric dating of the dykes from the Hurd Peninsula, Livingston Island, South Shetland Islands".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 15.8(2003):925-934. |
入库方式： OAI收割
来源：地质与地球物理研究所
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