CENOZOIC EXTENSIONAL TECTONIC SYSTEM CONTROL OF THE UNDERGROUND WATER IN ORDOVICIAN LIMESTONE IN EAST WEIBEI, SHAANXI PROVINCE

From the tectonic view point of a new mobilist and systematist, the model of Cenozoic extensional tectonic system distributed in east Weibei(eastern part of the northern Weihe River area, Shaanxi) is established in this paper. And the structural network control of the distribution of ordovician limestone, the hydrogeologic unit boundary and the movement of the underground water in the Ordovician limestone is discussed at some length with the texture and structure of the rockmass as a basis.