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接近贵州边境的重庆南桐煤矿,是一个经过多年勘探和开发的老矿区。这里积累了相当丰富的构造形态方面的资料。但是,为什么这个南北长10公里的窄长背斜,要向东凸出成为近似正弦曲线形状?它为什么还向北倾伏,而且是多级不协调的复式背斜?其中又为什么会出现五花八门的各式各样的构造现象?这些构造现象之间有什么样的内在连系?它们又是在什么样的构造应力场的条件下形成和发展的?什么样的动力因素、边界条件因素和物性因素的综合作用,才得以造就出这个复杂的南桐背斜呢?这些问题是以前从未充分阐明的疑难;也是本文试图予以论述的内容。
Chongqing Nantong Coal Mine, close to Guizhou border, is an old mining area that has been explored and developed for many years. Here has accumulated a wealth of information on the form of structure. But why is this narrow, long anticline 10 km long from north to south convex to the east to an approximately sinusoidal shape? Why does it dip north and it is a multi-level incongruous double anticline? What kind of dynamical factors, the boundary conditions and the formation and development of what kind of tectonic stress field are they? The complex role of physical factors, to be able to create this complex Nantong anticline? These problems are never fully explained the difficulties; is also the content of this article is intended to be discussed.