地质论评2011，Vol.57Issue(2)：153-166,14.
合肥盆地伸展方向的演变及其动力学机制
Evolution of Extensional Direction in the Hefei Basin and Its Dynamic Mechanism
摘要
Abstract
On the basis of analyses on depositional patterns, fault activity, syn-eruption normal faults,dike arrangement, border fault kinematics and stress calculation from slip-data in the Hefei basin, detailed studies on evolution of extensional direction were conducted. The results show that the basin experienced an evolution from WNW -ESE extension of the earliest -middle Early Cretaceous, NW-SE extension of the latest Early Cretaceous to nearly N-S extension of Late Cretaceous-Paleo gene. Previous studies demonstrate that the Izanagi Plate moved WNW-wards during the earliest-middle Early Cretaceous and NNW-wards during latest Early Cretaceous while the Pacific Plate moved generally northwards during the Late Cretaceous to Paleogene. The synchronous clockwise rotation of the both extensional direction and oceanic plate motion suggests that destruction of the eastern North China Craton took place under the back-are extensional setting. The coupling variation between the extensional direction in the back-are region of the overriding continental plate and oceanic plate motion may be a result of change in trench retreating direction that leads to the change of extensional direction in the back-arc region.关键词
合肥盆地/沉积格局/正断层/应力场/华北克拉通破坏/动力学背景Key words
Hefei basin/ depositional pattern/ normal fault/ stress field/ North China Craton destruction/ dynamic setting引用本文复制引用
朱光,朴学峰,张力,张必龙,陈印,胡召齐..合肥盆地伸展方向的演变及其动力学机制[J].地质论评,2011,57(2):153-166,14.基金项目
本文为国家自然科学基金"华北克拉通破坏"重大研究计划项目(批准号:90714004)的成果. （批准号:90714004）
