Crustal thickness and Vp/Vs ratio of the central and western North China Craton and its tectonic implications
会议名称：《中国科学院地质与地球物理研究所第11届（2011年度）学术年会》
会议日期：2012年
学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学]
基 金：supportedbytheNational Science Foundation of Chma(Grants 90814002 and 90914011)
关 键 词：Body waves Cratons Crustal structure Asia
摘 要：SUMMARY We obtained the crustal thickness(H) and average Vp/Vs ratio(κ) for the central(CNCC) and western North China Craton(WNCC) by H-κstacking of receiver *** results show that H andκvaries significantly but similarly in the northern and southern CNCC,reflecting possible effects of the Phanerozoic cratonotic reactivation on the *** the WNCC,the south is featured byκvalues typical for Precambrian shields(～1.77) and variations of H mirroring surface topography;the north presents large fluctuations ofκ(1.68-1.93) and a crustal thickening(up to 50 km) uncorrelated with *** N-S differences were thought to be associated with a～1.95-Ga suturing event occurred in the north with little effects on the *** observations suggest that distinct structural heterogeneities of the NCC not only reflect diverse regional tectonics in Phanerozoic,but also provide evidence for long-term survival of crustal fabrics in stable continental interior.