典型文献
Crustal structure of the Qiangtang and Songpan-Ganzi terranes(eastern Tibet)from the 2-D normalized full gradient of gravity anomaly
文献摘要：
Numerous geophysical studies have revealed the lithospheric structure of the Qiangtang and the Songpan-Ganzi terranes in the eastern Tibetan Plateau.However,crust-mantle evolution and crustal response to the Indian lithospheric subduction are still controversial.Answering these questions requires additional information regarding crustal structure.In this study,the 2-D normalized full gradient(NFG)of the Bouguer gravity anomaly was used to investigate anomalous sources and interpret the crustal structure underneath the Qiangtang and Songpan-Ganzi terranes.The NFG-derived structures with low-order harmonic numbers(N=33 and N=43)showed that an anomalous source beneath the southern Qiangtang terrane had a characteristic northeastward-dipping shape,suggesting the northeastward motion of the crustal material induced by underthrusting Indian lithospheric mantle.The NFG images with harmonic number N=53 showed a large-scale anomalous source in the lower crust of the transformational zone from the Qiangtang terrane to the Songpan-Ganzi terrane,consistent with thickening crust and resistance of lower crustal flow.The anomalous source demonstrated by the NFG results with harmonic number N=71,located in the upper crust underneath the Ganzi-Yushu fault,suggested a seismogenic body of the 2010 Mw6.9 Yushu event.
文献关键词：
中图分类号：
作者姓名：
Songbai Xuan;Chongyang Shen
作者机构：
Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Institute of Seismology,China Earthquake Administration,Wuhan 430071 China
文献出处：
引用格式：
[1]Songbai Xuan;Chongyang Shen-.Crustal structure of the Qiangtang and Songpan-Ganzi terranes(eastern Tibet)from the 2-D normalized full gradient of gravity anomaly)[J].大地测量与地球动力学（英文版）,2022(06):535-543
A类：
Songpan,NFG,underthrusting
B类：
Crustal,Qiangtang,Ganzi,terranes,eastern,from,normalized,full,gradient,gravity,anomaly,Numerous,geophysical,studies,have,revealed,lithospheric,Tibetan,Plateau,However,mantle,evolution,crustal,response,Indian,subduction,are,still,controversial,Answering,these,questions,requires,additional,information,regarding,this,study,Bouguer,was,used,investigate,anomalous,sources,interpret,underneath,derived,structures,order,harmonic,numbers,showed,that,beneath,southern,had,characteristic,northeastward,dipping,shape,suggesting,motion,material,induced,by,images,large,scale,lower,transformational,zone,consistent,thickening,resistance,flow,demonstrated,results,located,upper,Yushu,fault,suggested,seismogenic,body,Mw6,event
AB值：
0.455577
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