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关于梳状褶皱的的力学成因,主要有两种不同的观点:一种认为是由垂直顶托产生的横弯曲型褶皱,另一种认为是由水平挤压产生的纵弯曲型褶皱。川东褶皱就是一束北北东向的典型的梳状褶皱;此外,它还与其他方向的褶皱相横跨。对川东梳状褶皱的力学成因和横跨现象的研究,在理论上和实践上都有重要的意义。本文根据笔者的野外调查,以川东梳状褶皱北段的一个高背斜——七里峡背斜为例,试对褶皱的力学机制和横跨现象提出一些初步的分析。
There are mainly two different viewpoints about the mechanical origin of comb-like folds: one is considered as a transversely curved folds produced by vertical jacking, and the other is considered as a longitudinally curved folds produced by horizontal extrusion. The East Sichuan fold is a bundle of north-east-northeast typical comb folds; in addition, it straddles the folds in other directions. The research on mechanic cause and cross-over phenomena of comb-like folds in eastern Sichuan is of great significance both theoretically and practically. Based on the author ’s field investigation, taking a high anticline - Qilixia anticline in the north segment of the comblike fold in eastern Sichuan as an example, this paper tries to put forward some preliminary analyzes on the mechanics mechanism and cross - over phenomena of the fold.