从南昌凹陷构造演化分析赣江断裂带运动学特征  

ANALYSIS OF KINEMATIC FEATURES OF THE GANJIANG FAULT ZONE BASED ON THE TECTONIC EVOLUTION OF THE NANCHANG SUBBASIN

作　　者：周松源[1] 张介辉[2] 徐克定[2] 蒋维三[2] 彭军[1] 刘家铎[3] 

机构地区：[1]西南石油学院资源与环境学院,四川成都610500 [2]中国石油天然气股份有限公司浙江勘探分公司,浙江杭州310013 [3]成都理工大学,四川成都610059

出　　处：《地质力学学报》2005年第3期266-272,共7页Journal of Geomechanics

基　　金：四川省重点学科建设项目基金(编号:SZD0414)资助。

摘　　要：通过对近几年南鄱阳坳陷油气勘探取得的地质、地球物理资料的分析,认为该盆地形成和构造演化是在燕山期古构造格局的限制下,受控于赣江断裂带的活动,以走滑-伸展为主要特征。提出南昌凹陷构造演化模式为冷水坞期(K1l)具走滑-拉分盆地性质;周家店期—南雄早期(K2z^K2n1)为左行走滑盆地;在南雄早期末发生构造转折,南雄中晚期(K2n2+3)转化为右行走滑-伸展盆地;清江期(E1q)为新生断陷盆地。据南昌凹陷的成盆演化特征推断赣江断裂带大规模左行走滑的时代为晚白垩世早、中期,转折点在南雄早期K2n1末。On the basis of an analysis of geological and geophysical data obtained by petroleum exploration in the South Poyang depression in recent years, the authors propose that the basining and tectonic evolution of the South Poyang depression were controlled by the activities of the Ganjiang fault zone under the constraint of the Yanshanian tectonic framework. The main tectonic activities were strikeslip movement and extension. The model of the tectonic evolution of the Nanchang subbasin is as follows ： in the Lengshuiwuan （K1l ）, the subbasin was a strike-slip-pull-apart basin; in the Zhoujiadianian （K2z） to early Nanxiongian （K2n^1） it was a sinistral strike-slip basin; at the end of the early Nanxiongian a tectonic turn took place; in the mid-late Nanxiongian （K2^n2＋3） it changed to a dextral strike-slip-extensional basin; in the Qingjiangian （E1q） it became a new downfauhed basin. According to the features of the basining and tectonic evolution of the Nanchang subbasin, the authors suggest that the large-scale sinistral strike-slip movement of the Ganjiang fault zone occurred in the early-mid Late Cretaceous and the turning point from the sinistral strike slip movement to dextral strike-slip movement occurred at the end of the Late Cretaceous early Nanxiongian （K2n^1）.

关 键 词：赣江断裂带 运动学特征 南昌凹陷 鄱阳盆地 构造演化 

分 类 号：P54[天文地球—构造地质学] P542.3[天文地球—地质学]