• 责任者：Zhang Jian (Key Laboratory of Computational Geodynamics ; University of Chinese Academy of Sciences ; CAS ; Beijing 100049 ; China) ; Chen Shi
• 刊名：Earthquake
• 出版年：2013
• 卷期：33(4)
• 关键词：重力场 ; gravity field ; 地壳结构 ; crustal structure ; 地幔结构 ; mantle structure ; 青藏高原 ; Qinghai-Tibetan Plateau
• 页码：p.11-18
• 图表：4 illus., 15 refs.
• 分类号：0400
• issnNo：ISSN1000-3274
• isbnNo：CN11-1893/P

     Based on gravity data,this paper analyzed the crust-mantle model of the Qinghai-Tibet Plateau,and studied the geodynamic conditions and mechanism for the deep material movement.Gravity analysis shows that the southwest of the Qinghai-Tibet Plateau is mainly uplift in current tectonic deformation,while the crustal material flows and stretches to east.By combining of Bouguer anomaly and Free-air anomaly,we find that the southeast part of the Qinghai-Tibet Plateau has strong crust and weak mantle.The east region of the Plateau is flexible in the lower crust,and is brittle in upper mantle.Because of the differences in the crust-mantle structure,each region need its own potential energy to drive deformation.With the same potential conditions,the south and east regions will be more prone to deformation.Furthermore,the south area is easier to uplift,and the east area is easier to extend.As a result,the west part is mainly an uplifting-thickening area,and the east part is mainly a stretch-lateral extrusion area.