摘要
通过宏观描述、地震解译、有限应变测量、显微构造分析及包裹体测温等方法对黔东凯里-三都断裂进行了研究。认为凯里-三都断裂是黔东南推覆体的前锋断裂,呈向NWW突出的弧形,总体表现为由数条断层组成的逆冲断裂带,主断裂倾向SEE,为黔南拗陷和雪峰古陆的分界线。断裂带以浅层脆性变形为主,断裂带上盘向NWW推覆的水平位移达12～15km,是多条断层多期挤压、拉张和平移剪切作用叠加的结果。断裂带经历了多期演化过程,燕山期以来的演化历史主要受太平洋构造域控制,早中燕山期为主挤压逆冲阶段、晚燕山期为拉张正滑阶段、喜马拉雅期为再次挤压-定型阶段。
The Kaili-Sandu fault is the forward fracture of the thrust nappe in Southeast Guizhou. It shows an arcuate thrust-belt bulging to NWW and consists of several faults. The main fault of the Kaili-Sandu fault belt dips to SEE and separates the South Guizhou depression from the Xuefengshan uplift and is characterized by the brittle deformation. The horizontal displacement of the hanging wall of the Kaili-Sandu fault thrusting to NWW is about 12---15 km. This is the result of numerous faults＇ multi-stage compression, extension and strike slip shearing movements. The Kaili-Sandu fault belt has undergone multi-tectonic movement, mainly controlled by the Pacific tectonic domain since Yanshanian. Early and middle Yanshanians are the main compression and thrusting stages, late Yanshanian is the extension and slipping stage, and Himalayan is the compression and final structureshaping stage.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第1期18-26,共9页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
国家自然科学基金资助项目(40972137)
贵州省国土资源厅项目(101-KH106274)
关键词
凯里-三都断裂
地球物理
宏观结构
微观变形
均一温度
演化历史
Kaili-Sandu fault
geophysics
macroscopic structure
microscopic deformation
homogenization temperature
evolutionary history
