Crustal and Uppermost Mantle Structure of the Heilongjiang Region from Ambient Noise Tomography

详细信息   

• 责任者：Gao Donghui (Institute of Theoretical and Applied Geophysics ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Chen Yongshun
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(4)
• 关键词：速度结构 ; velocity structure ; 层析技术 ; tomography ; 黑龙江省 ; Heilongjiang Province
• 页码：p.1043-1051
• 图表：6 illus., 25 refs.
• 分类号：0400
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The authors have inverted for the Rayleigh wave group velocity distribution of Heilongjiang Province at periods of 8～40 s using ambient noise tomography. Two-years continuous data used in this study are from 44 permanent seismic stations of the Heilongjiang Regional Seismic Network and adjacent stations in Jilin and Inner Mongolia provinces. The results show significant lateral variations in crustal and uppermost mantle structures of the region. Group velocity anomalies at short periods correlate well with the surface geology of basins and mountains. The strong slow velocity anomaly at periods of 8~20 s beneath the Songliao Basin suggests a rather thick sediment deposit.