Complicated seismic anisotropy beneath south-central Mongolia and its geodynamic implications
Complicated seismic anisotropy beneath south-central Mongolia and its geodynamic implications
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蒙古中南部地区复杂的地震各向异性及其地球动力学意义
DOI：
10.1016/j.epsl.2017.02.035
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发表时间：
2017-05
影响因子：
5.3
通讯作者：
Flesch Lucy M.
中科院分区：
文献类型：
--
作者：
Qiang Zhengyang;Wu Qingju;Li Yonghua;Gao Mengtan;Demberel Sodnomsambuu;Ulzibat Munkhuu;Sukhbaatar Usnikh;Flesch Lucy M.
在蒙古中南部部署的69个临时台站的两年高质量宽带地震数据为研究该地区各向异性形成机制提供了机会。通过对SKS震相的分析，得到的大部分剪切波分裂观测结果具有NW-SE向的快速方向和较大的分裂延迟时间（有6个台站的分裂延迟时间大于2.0 s），推测这是由活动的软流层流动产生的。快方向的变化可能与软流层绕着位于岩石圈底部的西伯利亚深俯冲龙骨的偏转有关。在戈壁沙漠观测到的几个延迟时间相对较小的NE-SW向快速方向平行于主要断裂和缝合线的走向，这可能代表岩石圈变形。此外，它被推断，小规模的热地幔上涌是负责产生一个集群的零测量观察到的Hentiy山南部。
Two years of high-quality broadband seismic data from 69 temporary stations deployed in south-central Mongolia provide an opportunity to study the anisotropy-forming mechanisms in this area. The majority of shear wave splitting observations determined from the analysis of teleseismic SKS phase are characterized by NW–SE trending fast directions with large splitting delay times (greater than 2.0 s at six stations), which is inferred to be generated by active asthenospheric flow. The variation of the fast direction may be associated with deflection of asthenosphere around the deep Siberian cratonic keel at the base of the lithosphere. Several of the NE–SW trending fast directions with relatively small delay times observed in the Gobi Desert are parallel to the strike of the main faults and sutures, which may represent lithospheric deformation. In addition, it is inferred that small-scale hot mantle upwelling is responsible for generating a cluster of null measurements observed on the south of the Hentiy Mountain.
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影响因子：
0.9
作者：
Y. Zorin;E. Turutanov;V. Kozhevnikov;S. Rasskazov;A. Ivanov
通讯作者：
Y. Zorin;E. Turutanov;V. Kozhevnikov;S. Rasskazov;A. Ivanov
影响因子：
4.9
作者：
Stephanie M. Briggs;A. Yin;C. Manning;Zhengle Chen;Xiao-feng Wang;M. Grove
通讯作者：
Stephanie M. Briggs;A. Yin;C. Manning;Zhengle Chen;Xiao-feng Wang;M. Grove
影响因子：
5.3
作者：
C. Petit;J. Déverchère;É. Calais;V. San’kov;D. Fairhead
通讯作者：
C. Petit;J. Déverchère;É. Calais;V. San’kov;D. Fairhead
DOI：
10.1016/j.cageo.2007.08.002
发表时间：
2008-05
期刊：
Comput. Geosci.
影响因子：
--
作者：
A. Wüstefeld;G. Bokelmann;C. Zaroli;G. Barruol
通讯作者：
A. Wüstefeld;G. Bokelmann;C. Zaroli;G. Barruol
影响因子：
--
作者：
R. Hartog;S. Schwartz
通讯作者：
R. Hartog;S. Schwartz