Shallow shear-wave velocity structures under the Weishan volcanic cone in Wudalianchi volcano field by microtremor survey
文献类型：期刊论文
| 作者 | Zhang Bao-Long1,2; Li Zhi-Wei2; Bao Feng2; Deng Yang3; You Qing-Yu4; Zhang Sen-Qi5 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 59期号:10页码:3662-3673 |
| 关键词 | Shallow Velocity Structure Shear-wave Velocity Microtremor Survey Surface Wave Tomography |
| DOI | 10.6038/cjg20161013 |
| 文献子类 | Article |
| 英文摘要 | A dense seismic array with wireless digital geophones was deployed to record continuous seismic noise to investigate the shallow velocity structure beneath the Weishan volcanic cone. The ESPAC technique, which is one of popular microtremor survey methods, was adopted to extract the Rayleigh wave phase velocity dispersion curves between station pairs. We obtained high-resolution phase velocity maps at 2 similar to 5 Hz with these dispersion measurements, and constructed a 3-D shallow shear-wave velocity model beneath Weishan volcanic cone by inverting the phase velocity dispersion curves at each grid points using an iterative linearized least-square inversion scheme. Significant velocity anomalies at different depths (0 similar to 700 m) and different regions are shown in the obtained 3-D shear-wave velocity model. At 0 similar to 150 m depth, the low velocity anomalies are mainly distributed far away from the Weishan volcanic cone, and the high velocity anomalies are mainly distributed near the cone. On the contrary, at deeper depth of 150 similar to 700 m, it was shown a totally different feature with the low velocity anomalies mainly constrained near the cone, and the high velocity anomalies situated far away from it. Field geological survey indicates that the Weishan volcanic areas are covered by unconsolidated sediment layer and very porous basalt. Therefore, far away from the cone the low velocity anomaly at shallow depth (<150 m) may correlate with the unconsolidated sediments, and high velocity anomaly at deeper depth (>150 m) implies the influence of the crystalline metamorphic rocks. Otherwise, near the Weishan volcanic cone area, the relatively high velocity anomaly at shallow depth may be due to the consequence of volcanic eruptions of porous basalt, while the relatively low velocity anomaly at deeper depth probably points to the volcanism caused more fragmentations which were filled with pore fluid. |
| WOS关键词 | AMBIENT SEISMIC NOISE ; ARRAY ; MICROSEISMS ; TOMOGRAPHY ; SEISMOLOGY ; TREMOR ; BASIN ; CRUST |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000388654300013 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53222]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 作者单位 | 1.Univ Sci & Technol China, Mengcheng Natl Geophys Observ, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China 3.Heilongjiang Earthquake Adm, Harbin 150090, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China 5.China Geol Survey, Hydrogeol & Environm Geol Survey Ctr, Baoding 071051, Hebei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Bao-Long,Li Zhi-Wei,Bao Feng,et al. Shallow shear-wave velocity structures under the Weishan volcanic cone in Wudalianchi volcano field by microtremor survey[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(10):3662-3673. |
| APA | Zhang Bao-Long,Li Zhi-Wei,Bao Feng,Deng Yang,You Qing-Yu,&Zhang Sen-Qi.(2016).Shallow shear-wave velocity structures under the Weishan volcanic cone in Wudalianchi volcano field by microtremor survey.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(10),3662-3673. |
| MLA | Zhang Bao-Long,et al."Shallow shear-wave velocity structures under the Weishan volcanic cone in Wudalianchi volcano field by microtremor survey".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.10(2016):3662-3673. |
入库方式： OAI收割
来源：地质与地球物理研究所
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