东秦岭北部地区是中国东部南北两大陆块(华北地台和扬子地台)之间自晚元古代以来的一个长期活动的狭长高应变带。在这个长600公里以上,宽40—60公里的“条带”上,分布有前寒武纪变质岩、未变质的沉积岩和火山岩、晚期花岗岩等。前称“秦岭地轴”。它与南、北陆块具有截然不同的地质构造演化历史。 The northern part of the East Qinling Mountains is a long, high-strain zone of long-standing activity since the Late Proterozoic between the two continental blocks in the eastern and southern China (the North China platform and the Yangtze platform). Pre-Cambrian metamorphic rocks, unmodified sedimentary rocks and volcanic rocks, late granites and so on are distributed on this “strip” of over 600 km in length and 40-60 km in width. Formerly known as “Qinling axis.” It has completely different evolutionary history of the geological structure with the South and North continental blocks.