Ar-Ar and U-Pb geochronology of Late Paleozoic basalts in western Guangxi and its constraints on the eruption age of Emeishan basalt magmatism
文献类型：期刊论文
| 作者 | Fan, WM; Wang, YJ; Peng, TP; Miao, LC; Guo, F |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2004-11-01 |
| 卷号 | 49期号:21页码:2318-2327 |
| 关键词 | radiometric dating zircon basalt mantle plume |
| ISSN号 | 1001-6538 |
| DOI | 10.1360/04wd0201 |
| 文献子类 | Article |
| 英文摘要 | The Late Paleozoic layered or stratoid-layered basalts in western Guangxi have similar elemental and isotopic compositions to Emeishan high-Ti basalts. Whole-rock Ar-40/Ar-39 and SHRIMP zircon U-Pb dating were carried out for the representative basalt samples in three typical profiles in the area. Three basalts from the upper segment of Yangxu profile and lower segment of Yufeng and Min'an profiles yield the Ar-40/Ar-39 plateau ages of 253.6 +/- 0.4 Ma (20BS-71), 255.4 +/- 0.4 Ma (20BS-99) and 256.2 +/- 0.8 Ma (20BS-119), respectively. Twenty-three analyses on 23 zircons of the basalt from the upper segment of Yangxu profile give a weighted mean Pb-206/U-238 age of 253.7 +/- 6.1 Ma with an MSWD = 2.8. These new and published geochronological data for Emeishan large igneous province (LIP) indicate that the Emeishan LIP was initiated at similar to260 Ma, voluminously erupted between 253 and 256 Ma, and possibly ended at similar to251-253 Ma: The age (251-260 Ma) is generally consistent with that of the associated environmental deterioration and mass extinction events at the end-Guadalupian and Permo-Triassic boundary. These precise geochronological data provide important constraints on the dominantly eruptive time of the Emeishan LIP and understanding of the distribution of Emeishan high-Ti basalts and its mantle plume dynamics. |
| WOS关键词 | PERMIAN-TRIASSIC BOUNDARY ; LARGE IGNEOUS PROVINCE ; MASS EXTINCTION ; FLOOD BASALTS ; SW CHINA ; RAPID ERUPTION ; END ; EVOLUTION ; EVENTS ; CRISIS |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000226326000016 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/79379]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Fan, WM |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, WM,Wang, YJ,Peng, TP,et al. Ar-Ar and U-Pb geochronology of Late Paleozoic basalts in western Guangxi and its constraints on the eruption age of Emeishan basalt magmatism[J]. CHINESE SCIENCE BULLETIN,2004,49(21):2318-2327. |
| APA | Fan, WM,Wang, YJ,Peng, TP,Miao, LC,&Guo, F.(2004).Ar-Ar and U-Pb geochronology of Late Paleozoic basalts in western Guangxi and its constraints on the eruption age of Emeishan basalt magmatism.CHINESE SCIENCE BULLETIN,49(21),2318-2327. |
| MLA | Fan, WM,et al."Ar-Ar and U-Pb geochronology of Late Paleozoic basalts in western Guangxi and its constraints on the eruption age of Emeishan basalt magmatism".CHINESE SCIENCE BULLETIN 49.21(2004):2318-2327. |
入库方式： OAI收割
来源：地质与地球物理研究所
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