【摘要】 根据变形特征和构造组合形式,兰盆构造地西南缘推覆构造可划分为中央推覆带、前陆冲断带和前陆滑脱带。中央推覆带的雏型形成于印支期,叠加了后期的构造变形,以大面积岩浆活动和大幅度隆升为主要特征;前陆冲断带形成始于燕山期,叠加了喜马拉雅期的构造变形,其变形特征主要表现为逆冲构造和反冲构造,形成了冲断构造样式;前陆滑脱带形成于喜马拉雅期,以滑脱变形为主要特征,形成了隔档式褶皱。整个推覆构造经过了印支期、燕山期的强烈变形,于喜马拉雅期形成了现今的构造格局;其扩展方式为前展式,从临沧岩浆弧向盆地内部,构造活动的时间依次逐渐变新,变形强度依次逐渐减弱,由断裂(冲断)变形演变为褶皱(滑脱)变形。更多还原

【Abstract】 According to the deformation and tectonic assemblage,the nappe in SW margin of Lanping basin can be divided into central nappe zone,foreland thrust zone and foreland decollement zone. The primitive central nappe zone was formed in Indosinian,which has been superimposed by the later tectonic deformation,characterized by the large area of magmatism and the large scale of uplift. The formation of foreland thrust zone began from Yanshanian,superimposed by Himalayan tectonic deformation,formed the thrust pattern,characterized mainly by the inverse or reverse thrust. The foreland decollement zone was formed in Himalayan,formed the fold of partition pattern,characterized mainly by the decollement deformation. The entire nappe has experienced Indosinian,Yanshanian strong deformation. The present pattern is Himalayan tectonics. The expansion form is progressive development,tectonism time becomes younger; deformation intensity decreases,fault( thrust) becomes fold( decollement) from Lincang magmatic arc to the inner part of basin.更多还原