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Study on the relationship between multi-stage strike-slip mechanism and basin evolution in Fangzheng fault depression

机译：方正断陷多级走滑机制与盆地演化关系研究

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摘要

Fangzheng fault depression is controlled by the northern of the Tan-Lu fault zone. It undergoes multi-stage strike-slip, extrusion modification, and erosion of the thermal uplift, forming a tectonic pattern of uplifts connected with sags. Through the regional dynamic analysis, the study of the activity law of the western Pacific plate has clarified the formation and transformation of the regional tectonic stress field. Under the background of the multi-stage of the strike-slip mechanism in the northern part of the Tan-lu fault, the Fangzheng fault depression has a characteristic of the “left-lateral strike-slip pull-apart basin, right-lateral strike-slip extrusion transformation.” According to the difference of the strike-slip, the Fangzheng fault depression has divided into two parts: the East fault depression and the West fault depression. The seismic data, seismic attribute analysis, and geological modeling techniques have applied to analyze the two fault depressions, the East fault depression has actively controlled by the strike-slip activity, and the structure is complex. The seismic data quality is poor; the structure of the West Fault Depression is the opposite and structural characteristics of asymmetrical difference strike-slip in the East and West fault depressions. Interpretation of seismic sections through a slippery background, the strike-slip attributes of the whole fault depression from south to north are segmented, and the strike-slip mechanism from east to west is different. Under the control of the multi-stage strike-slip mechanism, the Fangzheng fault depression is divided into six stages of strike-slip evolution, corresponding to the six different stages of the strike-slip control basin, the formation process of the asymmetric difference strike-slip fault basin is clarified, which provides a reference for the study of the strike-slip pull-apart basin with multi-stage structure.
机译：防政断陷由by庐断裂带的北部控制。它经历了多级走滑，挤压变形和热隆升的侵蚀，形成了与垂陷相连的隆升的构造模式。通过区域动态分析，对西太平洋板块活动规律的研究明确了区域构造应力场的形成和转变。在the庐断裂带北部走滑机制多阶段的背景下，方正断陷具有“左走滑拉脱盆地，右走带”特征。滑挤出变形。”根据走滑带的差异，防政断陷分为东断陷和西断陷两部分。利用地震资料，地震属性分析和地质建模技术对这两个断陷进行了分析，东断陷受到走滑活动的积极控制，结构复杂。地震资料质量差;西部断层凹陷的构造与东西断层凹陷的不对称差异走滑的构造相反。从湿滑背景下解释地震剖面，对整个南北向断层凹陷的走滑属性进行了分割，从东向西的走滑机理也有所不同。在多级走滑机制的控制下，方正断陷分为走滑演化的六个阶段，对应于走滑控制盆地的六个不同阶段，非对称差走滑的形成过程阐明了滑脱断层盆地，为研究多级走滑拉脱盆地提供了参考。

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