Evolutionary history and deformation mechanism of thrust-nappes structure in Suqiao-xiaoxiyang well field, southwestern Fujian

Based on previous study data and the systematic studying the character of geometry and kinematics of the thrust-nappe structures in Suqiao-xiaoxiyang well field,the paper suggests that deformation mechanism is a“仑”style,the thrust-nappe faults and layer sliding faults are basic structural styles in the field.The layer sliding faults formed in Early Indosinian Epoch and the thrust-nappes formed through Early Yanshanian and Himalayan Epoch.The well field suffered erosion and deformation under regional stretching conditions,resulting in a series of thrusts and made the faults F₅ and F₆ reversion.At last it is suggested that during coal exploration should pay enough attention to the disappear of strata,and emphasized the combination of geophysics and drilling under the thrust-nappes structure.