摘要
作者在区调填图基础上研究了分布于滇、黔、桂“金三角”区的大型多层次逆冲—推覆构造。通过详细的地质构造制图及不同尺度的构造解析认为,这个逆冲—推覆构造系是于中生代晚期,因扬子地台的组成物质由北西向南东方向大规模的运移造成的。它是在相对构造简单地区内,遭受到多层次逆冲—推覆或强烈板内变形的一个典型实例。
This paper briefly analyzes the genetic, kinematic and dynamic features of a large multi-level sheeted thrust-nappe structure in the South Panjiang River and North Panjiang River valleys. The authors consider that the 'megafacies change line' of the Triassic in southwestern Guizhou determined by predecessors is actually an exposure line of the front of a giant arcuate nappe structure. This nappe structure, which originated in the Late Mesozoic, is superimposed on the pre-existing N-S-and E-W-trending tectonic belts. This reflects shallow-level detachment within the plate and is a manifestation of strain softening and localization. The discovery and study of this giant nappe structure are of theoretical and practical significance for understading the crustal structure and deformation features in southwestern Guizhou and guiding the work of geological mapping in sedimentary areas and prospcting and exploration for Carlin-type gold deposits in the 'Gold Triangle' area.
出处
《中国区域地质》
CSCD
1993年第3期239-247,共9页
Regional Geology of China
