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Upper crustal P-wave velocity structure beneath two volcanic areas in northern Iran

文献类型：期刊论文

作者Lu Yan1; Chen Ling2,3
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2017-04-01
卷号60期号:4页码:786-795
关键词Pg wave Tomography Crust Velocity Anisotropy Volcano
ISSN号1674-7313
DOI10.1007/s11430-016-9005-7
文献子类Article
英文摘要Detailed information about the crustal structure is essential for better understanding the occurrence and mechanisms of earthquakes and volcanoes. Here we present a study of the upper crustal P-wave velocity structure of two seismically and volcanically active areas in northern Iran using the two-dimensional Pg travel time tomography method. The imaging results suggest low velocities in the upper crust beneath the Damavand and Sahand-Sabalan volcanic areas in the central and western parts of northern Iran, respectively. The upper crustal low velocities in these two areas roughly coincide with previously imaged low Pn velocity anomalies, suggesting that the Late Cenozoic volcanic activity was probably caused by the upwelling of hot materials from the mantle. The image feature of the Pg velocity structure beneath the Sahand-Sabalan volcanic area further indicates that the hot materials stored in the upper crust beneath Sahand may be larger in size than those stored beneath Sabalan. Comparison of the Pg velocity images with the earthquake distribution in north Iran suggests that earthquakes mainly occur at moderately low velocity or low to high velocity boundary areas instead of significantly low or high velocity regions. The anisotropy results show that the Pg wave fast direction is consistent with the GPS direction at high Pg velocity areas and the fast direction is inconsistent with the GPS direction but consistent with the strike direction of faults at low velocity areas. Our new upper crustal structural images provide the basic observation for better understanding of the regional seismicity and volcanism, and link the surface geological phenomena to deep crustal and mantle processes associated with the active tectonics in northern Iran.
WOS关键词TRAVEL-TIME TOMOGRAPHY ; SOUTH CASPIAN BASIN ; SEISMIC TOMOGRAPHY ; CENTRAL ALBORZ ; UPPER-MANTLE ; DAMAVAND-VOLCANO ; JOINT INVERSION ; COLLISION ZONE ; NW IRAN ; PLATEAU
WOS研究方向Geology
语种英语
WOS记录号WOS:000400551300015
出版者SCIENCE PRESS
资助机构Chinese Academy of Sciences(XDB03010800) ; Chinese Academy of Sciences(XDB03010800) ; National Natural Science Foundation of China(41225016 ; National Natural Science Foundation of China(41225016 ; 41304065 ; 41304065 ; 41674066) ; 41674066) ; Chinese Academy of Sciences(XDB03010800) ; Chinese Academy of Sciences(XDB03010800) ; National Natural Science Foundation of China(41225016 ; National Natural Science Foundation of China(41225016 ; 41304065 ; 41304065 ; 41674066) ; 41674066) ; Chinese Academy of Sciences(XDB03010800) ; Chinese Academy of Sciences(XDB03010800) ; National Natural Science Foundation of China(41225016 ; National Natural Science Foundation of China(41225016 ; 41304065 ; 41304065 ; 41674066) ; 41674066) ; Chinese Academy of Sciences(XDB03010800) ; Chinese Academy of Sciences(XDB03010800) ; National Natural Science Foundation of China(41225016 ; National Natural Science Foundation of China(41225016 ; 41304065 ; 41304065 ; 41674066) ; 41674066)
源URL[http://ir.iggcas.ac.cn/handle/132A11/41598]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Lu Yan
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Lu Yan,Chen Ling. Upper crustal P-wave velocity structure beneath two volcanic areas in northern Iran[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(4):786-795.
APA Lu Yan,&Chen Ling.(2017).Upper crustal P-wave velocity structure beneath two volcanic areas in northern Iran.SCIENCE CHINA-EARTH SCIENCES,60(4),786-795.
MLA Lu Yan,et al."Upper crustal P-wave velocity structure beneath two volcanic areas in northern Iran".SCIENCE CHINA-EARTH SCIENCES 60.4(2017):786-795.

入库方式： OAI收割

来源：地质与地球物理研究所

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