宁芜火山岩地区在长江下游,地跨苏、皖两省,位于淮阳山字型构造前弧东翼,是一陆相断陷盆地。中生代以来,该地区岩浆活动强烈,表现为大面积的中性和偏碱性岩浆喷发和侵入,其中火山岩厚度达千余米。解放以来,不少单位对该火山岩地区进行了大量工作。江苏省区测队将盆地内部大规模发育的中生代火山岩系由下而上划分为“龙王山 Ningwu volcanic area in the lower reaches of the Yangtze River, across the Soviet Union and Anhui provinces, located in Huaiyang Mountain font structure east front of the arc, is a continental faulted basin. Since the Mesozoic, the magmatic activity in this area is strong, showing as a large area of ​​neutral and alkaline magmatic eruptions and intrusions, of which the thickness of volcanic rock reaches more than 1,000 meters. Since the liberation, many units conducted a great deal of work in this volcanic area. Jiangsu Province, the test team to large-scale development of the basin within the Mesozoic volcanic rock bottom-up into "Dragon King Hill