关键词: 断层相关褶皱, 断层传播褶皱, 断层转折褶皱, 玛东构造带, 塔里木盆地

Abstract: Madong fold and thrust belt is one of the best preserved fold and thrust belt forming in Early Paleozoic, and also the
hot-point of the oil and gas exploration in Tarim Basin. The erosion in the anticline of the thrust cause the low resolution of the seismic
data, which make the structural model and deformation mechanism of Madong fold and thrust belt confusing. The fault related folding
theory established the quantitive relationship between fold geometry, fault geometry and fault slip, which is an efficient method for
building the fold geometry using known fault shape. Madong fold and thrust belt is a well natural example for the application of the fault
related folding, with well constrained fault geometry and eroded anticline. We introduce the geometric and kinematic models of
fault-bend fold and fault propagation fold, and apply these two models to the typical structure in Madong fold and thrust belt. Using the
geometric relationship of fault-related fold, we build two probable models of Madong fold and thrust belts for fault-bend fold and fault
propagation fold, respectively. Considering the coincidence of the models with seismic data and drilling data, the fault-bend fold is the
most suitable model for the geometric and kinematic model of Madong fold and thrust belt, and the influence of structural model on
hydrocarbon traps is also discussed.

Key words: fault-related fold, fault propagation fold, fault-bend fold, Madong structural belt, Tarim Basin