摘要
雪峰隆起是扬子准地台与南华褶皱系的分界单元,经历晋宁晚期古隆起、加里东期末局部隆起和中生代全面隆起3个阶段的演化历程,上叠中生代陆相盆地。雪峰山构造带主要为陆内造山带,据变形特征从NW至NE划分为3个平行的NNE-NEE向弧形构造带。呈现出从中深层次韧性、脆韧性-中浅层次韧脆性变形-浅层次脆性变形的变化规律。雪峰山及邻区推滑覆构造十分发育,主要形成于中生代,组成不对称背冲式扇形雪峰推滑覆构造系。雪峰隆起西侧武陵坳陷为被动陆缘区,有下、上两大套海相生储盖组合及加里东期、印支期、中生代等三大油气形成阶段。雪峰山隆起及其邻区侏罗山式褶皱及推覆构造发育,其下可能保存部分残存海相油气藏。
Xuefengshan uplift which partitions Yangtze paraplatform from Nanhua Fold System is overcastted by Mosozoic continental basin,and has been evolved from ancient uplift in late Jinningian,through partial unlift in late Caledonian to entirely uplift in Mosozoic.Xuefengshan structural belt which is subdivided into three NNE-NEE striking arc structure belts from northwest to southeast is behaving continuous sequence from ductile deformation in the depths to brittle deformation on the surface.Xuefengshan nappe and slumped overthrust system with asymmetry back thrust sector shape is making up of lots of nappe and slumped overthrusts in Xuefengshan and adjacent area.Wuling downwarp with the passive continental margin property which locates west of Xuefeng uplift has got the upper and lower marine source-reservoir-cap assemblages and three formation stages for hydrocarbon which are the Caledonian,the Indosinian and the Mosozoic.The tectonic analysis above shows that some survival marine hydrocarbon maybe found under Jura-type folds and nappe structures in Xuefengshan uplift and adjacent area
出处
《华南地质与矿产》
CAS
2010年第1期68-75,共8页
Geology and Mineral Resources of South China
基金
中国地质调查局1:25万直根卡幅区调项目(编号:2000120000121)
关键词
形成演化
变形分带
推覆构造
海相油气
雪峰隆起
Xuefeng uplift
formation and evolution
deformation subdivision
nappe structure
marine hydrocarbon
