CAJ | 학술논문

在精细地震解释的基础上，采用断层落差法、断层活动强度法、平衡剖面技术和构造物理模拟实验等技术手段，确定了研究区的构造发育特征与构造形成演化过程，并讨论了构造形成机制。结果表明，冀中坳陷中北部在新生代伸展过程中以伸展构造样式为主，兼有走滑构造样式。其中，霸县凹陷以翘倾和滑动断阶构造样式为主，饶阳凹陷背斜构造样式占优，其最北部以走滑构造样式为主。受控于控凹断层的活动性，霸县凹陷和饶阳凹陷不同沉积时期，伸展强度具有较大差异性。饶阳凹陷自南向北受控于留路、河间和马西断层，凹陷的伸展量具有早期（ Ek-Es4）“南部大于中北部”，向中、晚期（ Es3-Ed）逐渐过渡为“中北部大于南部”的特征。霸县凹陷受控于牛东断层沿走向活动性差异，具有南段“早期强-中晚期弱”、中段“早期弱-中期强-晚期较弱”和北段“早期弱-中晚期强”的构造演化过程。利用构造物理模拟实验验证研究区断层发育过程，实验结果与断层发育特征具有很强的相似性，说明构造几何学和运动学特征分析的正确性。基于以上研究，将饶阳凹陷和霸县凹陷的构造演化过程划分为断陷弱早期、断陷强中期和断陷较强晚期3个阶段，并探讨了研究区构造发育演化的形成机制和深部背景。
재정세지진해석적기출상，채용단층락차법、단층활동강도법、평형부면기술화구조물리모의실험등기술수단，학정료연구구적구조발육특정여구조형성연화과정，병토론료구조형성궤제。결과표명，기중요함중북부재신생대신전과정중이신전구조양식위주，겸유주활구조양식。기중，패현요함이교경화활동단계구조양식위주，요양요함배사구조양식점우，기최북부이주활구조양식위주。수공우공요단층적활동성，패현요함화요양요함불동침적시기，신전강도구유교대차이성。요양요함자남향북수공우류로、하간화마서단층，요함적신전량구유조기（ Ek-Es4）“남부대우중북부”，향중、만기（ Es3-Ed）축점과도위“중북부대우남부”적특정。패현요함수공우우동단층연주향활동성차이，구유남단“조기강-중만기약”、중단“조기약-중기강-만기교약”화북단“조기약-중만기강”적구조연화과정。이용구조물리모의실험험증연구구단층발육과정，실험결과여단층발육특정구유흔강적상사성，설명구조궤하학화운동학특정분석적정학성。기우이상연구，장요양요함화패현요함적구조연화과정화분위단함약조기、단함강중기화단함교강만기3개계단，병탐토료연구구구조발육연화적형성궤제화심부배경。
On the basis of fine seismic interpretation ,various methods including fault throw method ,fault activity intensity method,balanced cross-section technique and physical simulation are adopted in this paper to analyze the Cenozoic tec -tonic characteristics and evolution process as well as the forming mechanism of structures .The results show that the north-central part of Jizhong Depression was dominated by extensional structures in the Cenozoic ,with strike-slip structure style also occurring .In Baxian Sag ,tilting and sliding fault terrace structural styles were predominant .While Raoyang Sag was dominated by anticline structural style except for its northernmost part where strike-slip structure style was common .The extensional intensity shows large diversity in different periods in both Baxian Sag and Raoyang Sag ,strictly controlled by the activity of boundary faults .Raoyang Sag was controlled by Liulu ,Hejian,and Maxi faults from south to north .The ex-tension of sag as characterized by transition from “south being larger than central-north” in Ek-Es4 to “central-north being larger than south” in Es3 -Ed.Baxian Sag was controlled by the diversity of Niudong fault activity along strike ,fea-turing in the tectonic evolution of “strong early stage but weak middle and late stages” in south,“weak early stage strong middle stage and weak late stage”in the central ,and “weak early stage but strong middle and late stages” in north .The physics simulation experiment validates the fault development process of research area .The experiment result has strong similarity with the development characteristics of the faults ,demonstrating the correctness of tectonic geometry and kine-matics characteristic analysis .On the basis of above research ,the tectonic evolution process of Raoyang Sag and Baxian Sag is divided into three stages ,namely weak early stage ,strong middle stage ,and fair late stage .Finally,the mechanism and deep background of tectonic formation and evolution are discussed .