- 责任者：Sun Yujun (Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China) ; Dong Shuwen
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(9)
- 关键词：岩石圈 ; lithosphere ; 深流作用 ; rheomorphism ; 中国 ; China
- 页码：p.2936-2946
- 图表：illus., 2 tables, 48 refs.
- 分类号：0400
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
The rheological structure controls the intensity and styles of lithospheric deformation.With the constraint of the upper mantle temperature derived from seismic velocity and the surface temperature from the observation of meteorological stations,we have calculated the threedimensional thermal structure of the continental lithosphere beneath China and adjacent regions according to the observed thermal parameters.Based on the 3D thermal structure and strain rates derived from GPS observation,we have calculated the rheological structure of the continental lithosphere with the constraint of the frictional slip,brittle fracture and creep.The results show that a weak ductile lower crust is widespread beneath China and adjacent regions.The weakest and thickest lower crust is found in the Tibetan plateau.The rheological strength and the effective viscosity of the lower crust are usually two orders of magnitude lower than that of the upper crust and the lithospheric mantle.The lithospheric strength and effective viscosity of the Tibetan plateau is lower than that of North China,South China and the Indian plate.In general,the lateral variations of the lithospheric rheology are consistent with the spatial patterns of late Cenozoic crustal deformation and gravity lineament.