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秦岭南部的勉略碰撞带,被认为是中朝与扬子两个古陆之间的缝合带,主要由泥盆纪和石炭纪的陆缘堆积物,包括活动与被动陆缘堆积物和时代不确定的古洋岩石圈残片等构成。近年来,在该带的硅质岩中发现了晚泥盆世的牙形石和早石炭世的放射虫化石,从而进一步证明了该带前身为古生代的洋盆。已有地质资料表明,区域上发育的古生代和三叠纪海相陆缘岩系的强烈构造变形,都发生在三叠纪期间。
The Mianlei collision zone in the southern part of the Qinling Mountains is considered to be the suture zone between the two ancient landforms of China, the DPRK and the Yangtze. It is mainly composed of the continental deposits of the Devonian and Carboniferous, including the active and passive continental deposits and the times Determined ancient ocean lithosphere debris and other components. In recent years, Late Devonian conodont and Early Carboniferous radiolarian fossils have been found in the siliceous rocks of the belt, which further proves that the belt was formerly a Paleozoic oceanic basin. The available geological data show that the intense tectonic deformation of the Paleozoic and Triassic marine marginal rock series developed in the region occurred during the Triassic period.