苏北溱潼凹陷的拉张量研究及构造运动强度分析

运用正演平衡剖面方法，本文对苏北溱潼凹陷三条剖面的演化过程进行了模拟，恢复计算出各断层各期次的伸展量，该箕状凹陷各发展阶段的拉张量以及对应于三期主要构造运动的拉张量。结果表明，构造运动具有延续性，仅在某些组段的表现更为强烈。在时空上，拉张活动具有很大的不均衡性，在凹陷的西南部，中部及东北部地区，拉张量及沉积特征均有很大差异，构造运动的强度也各不相同。

EXTENSIONAL STUDY OF QINTONG DEPRESSION IN NORTHERN JIANGSU USING FORWARD CROSSSECTIONAL BALANCING AS A POWERFUL TOOL FOR THE ANALYSIS OF STRUCTURAL MOVEMENT

The evolutional processes of three cross-sectional profiles of Qintong depression in northern Jiangsu have been simulated by using the method of forwared forward balanced cross sections.The amount of extension of each fault in all stages,the magnitude of extension of this faulted basin in developing stages and the quantity of extension corresponding to major struetural movement of three stages have been calculated.The results clearly suggest that the structural movement possessed continuity but may act more violently in some stages.Chronologically and spatially,the extension was greatly uneven. The magnitude of extension and resulting sedimentary charcteristics differ in the southwestern, middle and northeastern depressions as well as the observed intensity of the structural movement.