【摘要】 通过野外调查、室内实验与钻探资料对比分析对潞安矿区奥陶系岩溶演化主控因子特征进行研究.结果表明:1)加里东-海西期老岩溶形成在奥陶系顶部的峰峰组内;新构造运动期新岩溶只发育在裸露区-浅埋区和新断裂带上,形成多层水平岩溶洞穴.2)中奥陶统存在3个韵律结构使浅部新岩溶发育产生强弱相间的层控现象;石膏层的膏溶作用产生了膏溶角砾岩带、压碎岩带和裂隙带,是泥灰岩段成为裂隙岩溶含水段的主因.3)浅部走向强径流带与贯穿深浅部的逆倾向弱径流带的共同作用,使CaCO3,MgCO3溶蚀区域很局限,新岩溶只在浅部与老岩溶叠加;中深部老岩溶和陷落柱处于沉淀充填状态.4)新构造断裂带是矿区西部岩溶地下水获得浅层地下水越流补给的通道,也是弱富水区中强富水带.更多还原

【Abstract】 The main controlling factor of Ordovician Karst development were studied based on field investigation,in-door experiment,and drilling data.The results show that: 1) The Caledonian-Hercynian karsts were developed within the Fengfeng formation of the Ordovician roof while new karsts were formed only in the bedrock exposed area,shallowly buried area,and newly formed fault zone during neotectonic movement,forming some multi-layer horizontal karsts;2) There are three sedimentary rhythmic structures in the middle the Ordovician,making the newly formed karsts in shallow zones have a strata bound phenomenon,forming 3 zones of gypsum breccia zone,cataclastic rock zone,and fracture zone because of the gypsum swelling and solution of gypsum,which is the major casue for the marlite layer to become the fractured karst aquifer;3) The joint action of shallow-along-strike strong runoff zone and the deep-reversed-inclination weak runoff zone makes the CaCO3 and MgCO3 corrosion area quite limited and so the superposition of the newly developed karst zone with the old one can be seen only in shallow area,making the deep old karst or collapse column be filled up;and 4) The neotectonic fault zone is the leaking recharge channel through which the ground karst water in the west mining area is recharged.更多还原