CAJ | 학술논문

古构造应力场恢复是重建区域地质演化历史的重要手段之一。断层作为地壳浅表发育的脆性变形构造，为恢复古构造应力场提供了重要地质条件。关于利用断层滑动矢量反演古构造应力场，前人进行了长期探索。目前其相关理论基础、研究方法与实际应用均取得重要进展。在断层滑动矢量反演古构造应力场的理论方面，改进的安德森模式描述了在发育先存薄弱带的情况下断层形成与演化的规律，克服了安德森模式只适用于均匀变形域的理论局限性；在研究方法方面，突破了在沉积盆地内部变形相对单一的限制，在造山带前陆或者叠加褶皱区等复杂变形区有效地开展了相关研究，并通过断层相关褶皱与同褶皱变形的滑动矢量分析，厘定出同造山作用的古构造应力场。这一方法在大巴山造山带强变形区得到了有效应用，为探讨其构造演化提供了基础。
고구조응력장회복시중건구역지질연화역사적중요수단지일。단층작위지각천표발육적취성변형구조，위회복고구조응력장제공료중요지질조건。관우이용단층활동시량반연고구조응력장，전인진행료장기탐색。목전기상관이론기출、연구방법여실제응용균취득중요진전。재단층활동시량반연고구조응력장적이론방면，개진적안덕삼모식묘술료재발육선존박약대적정황하단층형성여연화적규률，극복료안덕삼모식지괄용우균균변형역적이론국한성；재연구방법방면，돌파료재침적분지내부변형상대단일적한제，재조산대전륙혹자첩가습추구등복잡변형구유효지개전료상관연구，병통과단층상관습추여동습추변형적활동시량분석，전정출동조산작용적고구조응력장。저일방법재대파산조산대강변형구득도료유효응용，위탐토기구조연화제공료기출。
A certain regional tectonic evolution history can be rebuilt by paleostress fields analyzing;faults usually occur in uppermost crust,and extremely useful structures to determine paleostress field in a certain region. In this paper,we give an overview of new advances of the paleostress field theory,methods and application in a complex structural belt,as testified by a case study.A modified Anderson model,which was originated from a traditional Coulomb—Mohr shear failure theory,proposes how a fault do form and develop along a pre-existing weakness zone (or pre-existing faults),providing the base to analyze fault structures.Additionally some progress was made in reconstructing the paleostress field in a certain orogenic belt,which can be rebuilt by synfolding striae measurement and analysis.Then we give a case study on the paleostress in the Dabashan orogen by this way, showing this method is effective to analyze the paleostress field.