Numerical simulation of lithosphere delamination at the continental orogenic belts
文献类型：期刊论文
| 作者 | Wang Hong-Liang1,2; Bai Wu-Ming1; Wang Qing-Ping1,2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2011-11-01 |
| 卷号 | 54期号:11页码:2851-2863 |
| 关键词 | Delamination Non-newtonian Fluid Convective Thinning Effective Viscosity Peel Away |
| ISSN号 | 0001-5733 |
| DOI | 10.3969/j.issn.0001-5733.2011.11.015 |
| 文献子类 | Article |
| 英文摘要 | Lithosphere delamination is a geodynamic process that part of lithosphere sinks into the asthenosphere because of its gravity instability. Based on Non-Newtonian fluid approximation, we perform numerical simulation of lithosphere delamination, and the effects of the lithospheric viscosity structure on this process are analyzed emphatically. Our numerical simulations show that: The lower crust plays an important role in the process and pattern of lithosphere delamination as its viscosity controls the degree of coupling between crust and mantle lithosphere; With certain initial gravity instability condition, when the effective viscosity of surrounding mantle lithosphere is between 10(22)similar to 10(24) pa . s the ueiammation process may take place within a short time period from 5 Ma to 30 Ma. The lithosphere delamination also shows different patterns with different viscosity structures. Within a suitable viscosity range (10(22) similar to 10(24) Pa . s),the higher the viscosity is, the slower the gravity instability develops, and so, the larger area of lithosphere would peel away and sink. As a result of lithosphere delamination, the orogenic belt transforms from compressive tectonic regime to extensional tectonic regime once the delamination slab detaches completely from the upper lithosphere. At last, the possible lithosphere delamination at Qinlin-Dabie-Sulu orogenic belts and its effect on the igneous activity and tectonic evolution are discussed. |
| WOS关键词 | RAYLEIGH-TAYLOR INSTABILITY ; MANTLE CONVECTION ; NONLINEAR VISCOSITY ; BENEATH ; DEFORMATION ; DETACHMENT ; MAGMATISM ; MOUNTAINS ; EXTENSION ; VELOCITY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000297535900015 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/73772]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wang Hong-Liang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Hong-Liang,Bai Wu-Ming,Wang Qing-Ping. Numerical simulation of lithosphere delamination at the continental orogenic belts[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(11):2851-2863. |
| APA | Wang Hong-Liang,Bai Wu-Ming,&Wang Qing-Ping.(2011).Numerical simulation of lithosphere delamination at the continental orogenic belts.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(11),2851-2863. |
| MLA | Wang Hong-Liang,et al."Numerical simulation of lithosphere delamination at the continental orogenic belts".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.11(2011):2851-2863. |
入库方式： OAI收割
来源：地质与地球物理研究所
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