摘要
在综合分析近年来柴达木盆地及邻区深部地球物理资料(如重力、航磁和地震反射剖面等),以及盆地构造格局和样式等相关地质成果的基础上,认为:柴达木盆地一级构造为新生代宽缓复向斜,且复向斜与盆地基底和岩石圈结构呈镜像特征;复向斜的形成与上地壳挠曲、下地壳流动以及刚性地幔顶部挠曲上隆为耦合关系,揭示出盆地新生代构造演化过程的直接动力源于深部岩石圈地幔物质的上涌;柴达木盆地整体为"上地壳挠曲,下地壳流动"型复向斜盆地。
The authors have analyzed geophysical data,such as Bouguer gravity,aero-magnetism,geological profile,and structural patterns from the Qaidam basin and adjacent regions.The first-order structure of the basin is a broad Cenozoic synclinorium,which is the mirror reflection of the mantle.The development of the synclinorium was coupled with the deformation of the upper-crust,lower-crust flow,and the upper mantle,suggesting that Cenozoic structural evolution of the Qaidam basin resulted directly from the uplift of the mantle.Qaidam basin is naturally a synclinorium depression,accommodating by upper-crust winding and lower-crust flowing.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2012年第5期930-938,共9页
Natural Gas Geoscience
关键词
基底
岩石圈地幔
上地壳流动
构造
柴达木盆地
Basement
Lithosphere-mantle
Upper-crust channel flow
Structure
Qaidam basin
