A numerical simulation of magma migration in crust fracture-an application to Changbaishan Tianchi volcano
文献类型：期刊论文
| 作者 | Cheng Xu1,2; Chen Zu-An1; Bai Wu-Ming1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 57期号:5页码:1522-1533 |
| 关键词 | Magma migration Numerical simulation Overpressure Changbaishan Tianchi volcano |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20140516 |
| 文献子类 | Article |
| 英文摘要 | We carried out a numerical computing using FEM and FDM to simulate the migration of magma which ascends from crustal magma chamber along existing fault under tectonic stress and its buoyancy. On the top of a chamber, due to tiny crack, magma can be driven into the crack under some certain overpressure and moves up so the crack extends further and a channel for magma migration forms. We made a research on the critical overpressure which can drive magma up under given magma viscosity. For 0. 1 Pa . s to 10(3) Pa . s of magma viscosity at about 10 km depth in the crust, magma can be driven up by magma pressure to surface when the overpressure reaches 17 similar to 20 MPa, and the larger the viscosity, the higher the critical overpressure. It has been viewed that density difference, which means the difference of effective density of country rock and density of magma, from 300 to 700 kg . m(-3), influenced overpressure little. Making a comparison of different results between model 3-D and model 2-D, we find out distinctive vertical displacement on surface. Considering regional geologic environment of Changbaishan Tianchi volcano, after parameters testing and computing analysis, we estimated the volume of the chamber which could exist under Changbaishan Tianchi volcano on the condition of our model that provides some certain overpressure and no severe tectonic stress change. This result might provide some reference for magma activity and relevant prediction and monitoring for Changbaishan Tianchi volcano region. |
| WOS关键词 | DRIVEN CRACK-PROPAGATION ; DYKE PROPAGATION ; BENEATH ; DEFORMATION ; MECHANISM ; TRANSPORT ; CHAMBER ; REGION ; MODEL ; AREA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000336701200016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85000]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Cheng Xu |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng Xu,Chen Zu-An,Bai Wu-Ming. A numerical simulation of magma migration in crust fracture-an application to Changbaishan Tianchi volcano[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(5):1522-1533. |
| APA | Cheng Xu,Chen Zu-An,&Bai Wu-Ming.(2014).A numerical simulation of magma migration in crust fracture-an application to Changbaishan Tianchi volcano.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(5),1522-1533. |
| MLA | Cheng Xu,et al."A numerical simulation of magma migration in crust fracture-an application to Changbaishan Tianchi volcano".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.5(2014):1522-1533. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。