Abstract:

 Comparisons between negative inversion faults and the “seesaw” structures, positive inversion folds and gravity slideshaped graben antiforms, layer compensation antiforms and diapirs antiforms, positive inversion faultspropagation and the rollover anticlines are discussed. Negative inversion faults and the “seesaw” structures have the similar external form of a reverse wedge, but the latter is formed by different fault activity in a unified regional stress field. Positive inversion folds and antiforms have similar profiles, but are different in the strata thickness, erosion degree, axial face, and associated structures. The formers strata are thick in the middle but thin in wings, and strata denudation thickness is lower in the wings, and it's strata overlap to the fold center above the unconformity. Gravity slide-shaped graben antiforms and layer compensation antiforms are under the control of regional tensile stress, so there is no erosion at the top of the strata, and no characteristics of middle strata thick but wings thin. Gravity slide-shaped graben antiform is the result of local pressure in regional tensile stress, so its size is small. Diapirs antiform is cross-bend fold with lateral stress-free, so its axial is always upright, and its associated structures such as depression of salt side and the top faults cluster are developed. Positive inversion faults-propagation and rollover anticline both develop anticlines on the fault hanging wall, but their anticline shapes, sizes, and strata thickness characters are different. Rollover anticline is controlled by contemporaneous faults, so its anticline area is small and height is little, and its axial basically parallels to the fault plane. Its denudation is not obvious at the top of strata and its strata thickness varies small laterally compared to the concaveconvex “horn-type” strata of positive inversion faults-propagation.

Key words:  inversion structure, gravity sliding structure, diapirs structure, rollover anticline