Attenuation of High-Frequency P and S Waves in the Crust of Central and Western Tien Shan
Attenuation of High-Frequency P and S Waves in the Crust of Central and Western Tien Shan
复制标题
天山中西地壳高频纵横波的衰减
DOI：
10.1007/s00024-020-02504-1
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发表时间：
2020-05
影响因子：
2
通讯作者：
Huang Zongying
中科院分区：
文献类型：
--
作者：
Ma Xiaolong;Huang Zongying
为了更好地了解天山造山带中西部地壳的衰减特征，我们应用扩展尾波归一化方法研究了两者的Qanda Qs值。我们利用当地台网的资料估计了P波和S波在1.0-20.0 GHz频段的频率相关衰减。Qp= (61 ± 9)×f(1.2 1±0.0 8)和Qs= (77 ± 6)x f(1.11±0.0 4)。较低的Q0和较高的η值表明天山中西部是一个构造和地震活动区。Qp、SandQs/Qp值的横向变化反映了研究区复杂的构造构造。一般来说，与构造活动区相对应的相对高衰减区位于天山中部山脉之下，而相对低衰减区与稳定区有关，如费尔干纳盆地和伊塞克库尔湖。此外，天山中部Qs/Qp>； 1区可能为部分流体饱和或富含分散非均质性，而西部天山地区则显示Qs/Qp<； 1，可能表明流体几乎完全饱和。
In order to better understand the attenuation characteristics in the crust of the central and western Tien Shan orogenic belt, we investigate bothQpandQsvalues by applying the extended coda-normalization method. We estimate the frequency-dependent attenuation of both P and S waves in the frequency band of 1.0–20.0 Hz using data from local networks. The average frequency relations ofQpandQshave been derived asQp= (61 ± 9) ×f(1.21±0.08)andQs= (77 ± 6) ×f(1.11±0.04)by fitting a power-law frequency dependence model for the study region. The lowQ0and highηvalues indicate that the central and western Tien Shan is a tectonically and seismically active region. We also find lateral variations of bothQp,sandQs/Qpvalues, reflecting complex tectonic structures in the study area. In general, the relatively high-attenuation areas corresponding to tectonically active regions are found beneath mountainous ranges in the central Tien Shan whereas the relatively low-attenuation areas are associated with stable regions, such as Fergana Basin and Issyk-Kul Lake. Besides, regions in the central Tien Shan withQs/Qp> 1 are likely partially saturated with fluids or rich in scattering heterogeneities, whereas regions in the western Tien Shan displayQs/Qp< 1, possibly suggesting almost complete fluid saturation.
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影响因子：
2.8
作者：
S. Lorenzo;F. Bianco;E. Pezzo
通讯作者：
S. Lorenzo;F. Bianco;E. Pezzo
天山造山带中西段地壳和上地幔地震层析成像
影响因子：
--
作者：
Jianshe Lei
通讯作者：
Jianshe Lei
受朝鲜核爆炸观测制约的中国东北和朝鲜半岛Pn波几何传播和衰减
影响因子：
3.9
作者：
Tian, Bao-Feng;Chen, Qi-Fu;Hao, Tian-Yao;Yao, Zhen-Xing
通讯作者：
Yao, Zhen-Xing
DOI：
10.1002/cjg2.566
发表时间：
2004-09
期刊：
Chinese Journal of Geophysics
影响因子：
--
作者：
B. Guo;Qi-yuan Liu;Jiuhui Chen;Dapeng Zhao;Shun-cheng Li;Yuan‐Gen Lai
通讯作者：
B. Guo;Qi-yuan Liu;Jiuhui Chen;Dapeng Zhao;Shun-cheng Li;Yuan‐Gen Lai
DOI：
--
发表时间：
2008
期刊：
--
影响因子：
--
作者：
Nourouzi Gh.R.;M. Ashtiani;G. H. J. Doulouei;M. Mohammad
通讯作者：
Nourouzi Gh.R.;M. Ashtiani;G. H. J. Doulouei;M. Mohammad