Geochemical features and their geological implications of volcanic rocks from the northern and middle Okinawa Trough
文献类型：期刊论文
| 作者 | Huang Peng; Li AnChun; Jiang HengYi |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2006-06-01 |
| 卷号 | 22期号:6页码:1703-1712 |
| 关键词 | Okinawa Trough isotopic composition magmatic evolution crystal fractionation |
| 英文摘要 | In order to remove non-volcanic components from samples and gain the actual geochemical and isotopic compositions for volcanic rocks, authors deal these rocks sampling with strict pretreatment. The isotopic data about volcanic rocks from the northern Okinawa Trough have not been reported in previous works. Based on the data of the U-series isotopic compositions, we distinguished the mass of subduction plate ( Philippine sea plate) from magna as a mixing component. Then, we take some works about the petrology, sources of magmas and magmatic evolution by U-series and Sr-Nd isotopic compositions of these rocks in the Okinawa Trough. The points are follow. Firstly, the Okinawa Trough held widely silicic volcanic activities, and the volcanic rocks belonged to cal-alkali group (sigma < 1. 8). Secondly, the magmas mainly came from mantle source area which has similar isotopic compositions to PREMA. The crystal fractionation was the most important geological process, but the magma also was contaminated with the mass from the upper crust and/or subduction plate. Finally, the volcanic rocks from the Okinawa Trough could be divided into two groups, which were contaminated by the upper crust and upper crust-subduction plate, based on the mixing model. Further, our studies indicated that contaminations occurred at the evening of magmatic evolution, in which SiO2 contents of magma system under the Trough were higher than exotic material. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000239220800027 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/32577]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geosci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Postgrad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang Peng,Li AnChun,Jiang HengYi. Geochemical features and their geological implications of volcanic rocks from the northern and middle Okinawa Trough[J]. ACTA PETROLOGICA SINICA,2006,22(6):1703-1712. |
| APA | Huang Peng,Li AnChun,&Jiang HengYi.(2006).Geochemical features and their geological implications of volcanic rocks from the northern and middle Okinawa Trough.ACTA PETROLOGICA SINICA,22(6),1703-1712. |
| MLA | Huang Peng,et al."Geochemical features and their geological implications of volcanic rocks from the northern and middle Okinawa Trough".ACTA PETROLOGICA SINICA 22.6(2006):1703-1712. |
入库方式： OAI收割
来源：海洋研究所
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