摘要:
陇南地区在研究中国大陆构造演化历史中具有重要的意义。本文主要以文献研究手段，在对国内外陇南区域地质构造比较研究的基础上，从大地构造背景、构造演化、区域构造以及现今活动性等四个方面入手，对现有的陇南区域地质构造研究成果进行了论述，并采用物探手段对稠泥河沿河地区进行了测试和研究。研究发现与礼县–罗家堡断裂呈一定交角方向上存在一条新的次级断裂——罗家堡–牡丹断裂，长约20km，总体走向NNW28˚，断裂由3条相互平行或斜列的次级断裂组合而成，活动性较强。
Abstract:
Longnan area plays a vital role in studying the tectonic evolution of Chinese mainland. This paper mainly adopts the methods of literature research and is based on the comparative study of the geological structure of Longnan area at home and abroad, which gives an introduction and comment of regional tectonics of Longnan on the domestic argumentation concerning tectonic setting, history of the tectonic evolution, regional structure and current activity of fault. What’s more, the riverine areas of Chouni River were tested and studied by geophysical prospecting. We found LuoJiabu-Mudan fault, which is a new secondary fault of LiXian-LuoJiabao fault with a certain angle, that the length is about 20 km, the overall trend is NNW28˚, the fault composed of the nearly three parallel faults, and the activity of fault is strong.