论文部分内容阅读
一问题的提出贺兰山东临鄂尔多斯盆地,西界平坦大沙漠,平地突起,作北北东向,形势雄伟,古有“贺兰如骏马”之称.南延山势渐低,及至六盤山,改作北北西向,山势复增.它们的发展史虽不相同,却成为一个狭长而近于连续的褶皱山系.贺兰-六盤山区之大地构造性质,与其两侧的塊体大不相同.贺兰山两侧为稳定的前震旦纪阿拉善地塊和鄂尔多斯台凹;六盤山东侧亦为鄂尔多斯台凹,两侧则为祁连山地槽区域.虽然贺兰山与六盤山的地质发展史不同,但同为一个长久的活动地带,实属显然.从两侧塊体之地质构造发展情况、和
A question raised Helan Shandong Erdos Basin to the east, the western boundary of the flat desert, plain protruding north-south east, the situation is magnificent, ancient “Helan such as horse.” South extension of the mountain gradually lower, and up to six Panshan, changed for north-northwest, the increase of the mountain.Although their development history is not the same, but has become a narrow and nearly continuous folds of the mountains.Helan - Liupanshan tectonic nature, and both sides of the block large Not the same Helan Mountain on both sides of the stable Pre-Sinian Alashan Block and the Ordos depression; also on the eastern side of the Liupanshan Erdos depression, on both sides of the Qilian Mountain trough area Although Helan Mountain and Liupan different geological history , But it is obvious that the same as a long-term activity zone. From the development of geological structures on both sides of the block, and