| A simulation study on the thermal structure of Manila trench subduction zone | |
| Gao Xiang1; Zhang Jian1; Sun Yu-Jun1; Wu Shi-Guo2; Gao, X (reprint author), Chinese Acad Sci, Grad Univ, Key Lab Computat Geodynam, Beijing 100049, Peoples R China. | |
| 2012 | |
| 发表期刊 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| ISSN | 0001-5733 |
| 卷号 | 55期号:1页码:117-125 |
| 文章类型 | Article |
| 摘要 | Numerical simulation study of thermal structure is a supplement to field observations and an important method to verify geodynamic models. In this study, based on geological and geophysical conditions, we construct two thermal models across the East Volcano Chain (EVC) and the West Volcano Chain (WVC) along the Manila trench subduction zone and do the thermal simulations using finite-element numerical method. During these simulations, we study the thermal structure of the subduction zones affected by the frictional and shear heating and simulate the thermal structure of the subduction zones beneath the seismic lines at EVC and WVC. We also employ the results of rock experiments to predict the regions of dehydration and partial melting in the subducting slab. The simulation results show that, at 100 km depth, at the slab interface with frictional and shear heating the temperature is 865 degrees C, about 95 degrees C warmer than temperature without frictional and shear heating. Considering the frictional and shear heating, the temperatures at the slab interface are 865 degrees C and 895 degrees C and at the base of subducting oceanic crust are 560 degrees C and 605 degrees C at 100 km beneath the seismic lines of EVC and WVC. At slab surface, the depth of dehydration onset is less than 50 km. However, partial melting and dehydration may mainly occur at about 100 km depth, which is well associated to the observed location of the volcanic activity. |
| 关键词 | Manila Trench Subduction Zone Thermal Simulation Frictional And Shearing Heat Finite-element |
| 学科领域 | Geochemistry & Geophysics |
| DOI | 10.6038/j.issn.0001-5733.2012.01.011 |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000300129300011 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/12492 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Gao, X (reprint author), Chinese Acad Sci, Grad Univ, Key Lab Computat Geodynam, Beijing 100049, Peoples R China. |
| 作者单位 | 1.Chinese Acad Sci, Grad Univ, Key Lab Computat Geodynam, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao Xiang,Zhang Jian,Sun Yu-Jun,et al. A simulation study on the thermal structure of Manila trench subduction zone[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2012,55(1):117-125. |
| APA | Gao Xiang,Zhang Jian,Sun Yu-Jun,Wu Shi-Guo,&Gao, X .(2012).A simulation study on the thermal structure of Manila trench subduction zone.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,55(1),117-125. |
| MLA | Gao Xiang,et al."A simulation study on the thermal structure of Manila trench subduction zone".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 55.1(2012):117-125. |
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