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一、岩溶工程地质分区及其基本特征本区地处云贵高原前哨与广西丘陵边缘和两者之间的过渡地带,地质构造上处于广西山字型的一部分,起控制作用的有: (1)前弧西翼,计有北西向的背、向斜17个,分布在南丹、河池、都安等县的广大地区,形态以箱状、屉状为主,占据着广大面积,其次为槽状、梳状,常呈窄条状; (2)盾地部位有捞村宽缓褶断区和环江上古生界断块区,分布在龙江上游打狗河与大环江之间及其两侧;
I. Karst Geological Zoning and Its Basic Characteristics This area is located in the transitional zone between the outposts of Yunnan-Guizhou Plateau and the hilly areas of Guangxi and its geological structure is part of the Guangxi Zhuang Zi type. West front of the arc, there are northwest to the back and anticline 17, located in Nandan, Hechi, Du’an County, vast areas, the shape of a box-shaped, drawer-like, occupy the vast area, followed by the groove Shaped, comblike and often narrow strips; (2) There are broadly folded fold areas of the Laohuncun and the Paleozoic fault block areas of the Huanjiang River in the shield area, which are distributed between the Daogou River and the Daoguan River at the upper reaches of the Longjiang River and On both sides;