Determining the ending time of basaltic volcanic activity by Ar-40/Ar-39 age of phlogopites from mantle-derived xenolith
文献类型：期刊论文
| 作者 | Du ShiJun; Xu XingWang; Yang LieKun; Fu Chao; Su Jie; Cui MinLi |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2009-12-01 |
| 卷号 | 25期号:12页码:3251-3258 |
| 关键词 | Ar-40/Ar-39 age Phlogopite Age of basalt Beiyan paleovolcanic crater Changle |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Cenozoic basalts in the Linqu-Changle area, Shandong Province, are characterized by abundant mantle-derived xenoliths. Recently, we discovered that some xenoliths in the Beiyan paleovolcanic crater contain some fine phlogopite veins related to mantle K-metasomatism. Since the closure temperature of phlogopite is much lower than the eruptive temperature of basaltic magma and the phlogopite has potential to record the time when hot magma cool down through the closure temperature of phlogopite, here we try to use the Ar-40/Ar-39 age of phlogopites to determine the ending time of eruption of basaltic magmas and age of basalt in the Beiyan paleovolcanic crater. Three phlogopite samples from three mantle-derived xenoliths from different positions in the Beiyan paleovocanic crater yielded identical Ar-40/Ar-39 plateau ages of 18.42 +/- 0. 21Ma, 18.65 +/- 0. 27Ma and 18.03 +/- 0. 63Ma respectively. It is concluded that the basaltic volcanic activities in the Beiyan paleovolcanic crater ended before about 18. 5Ma. It further suggests that the lacustrine sedimentary rocks containing abundant fossils in the Shanwang Basin unconformably overlying the basaltic rocks from the Beiyan paleovolcanic crater formed later after 18. 5Ma. Ar-40/Ar-39 dating of phlogopites is a new effective method for the dating of basalts containing phlogopite-bearing xenoliths. |
| WOS关键词 | EASTERN CHINA ; BENEATH ; CRATON |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000276369900013 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70918]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Du ShiJun |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du ShiJun,Xu XingWang,Yang LieKun,et al. Determining the ending time of basaltic volcanic activity by Ar-40/Ar-39 age of phlogopites from mantle-derived xenolith[J]. ACTA PETROLOGICA SINICA,2009,25(12):3251-3258. |
| APA | Du ShiJun,Xu XingWang,Yang LieKun,Fu Chao,Su Jie,&Cui MinLi.(2009).Determining the ending time of basaltic volcanic activity by Ar-40/Ar-39 age of phlogopites from mantle-derived xenolith.ACTA PETROLOGICA SINICA,25(12),3251-3258. |
| MLA | Du ShiJun,et al."Determining the ending time of basaltic volcanic activity by Ar-40/Ar-39 age of phlogopites from mantle-derived xenolith".ACTA PETROLOGICA SINICA 25.12(2009):3251-3258. |
入库方式： OAI收割
来源：地质与地球物理研究所
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