【摘要】 主要从水文地球化学的角度,以鄂尔多斯盆地白于山以南地区白垩系地下水的水化学水平分带和地表水基流水化学特征为主要依据,结合地质构造格局及岩相古地理条件,分析研究了该区白垩系地下水的补、径、排条件。认为该区白垩系地下水水化学场存在一个由东、北、西南向中部的水平分带,愈向盆地中部水质愈复杂、TDS愈高。马莲河基流水质的沿途变化规律反映出其接受东西两侧地下水的补给。说明鄂尔多斯盆地南区的东部地区和西南部地区为地下水补给区,而中心地带为地下水排泄区,最终经马莲河排出区外。天环向斜轴部和马莲河谷是南区汇集东西两侧地下水的排泄通道。更多还原

【Abstract】 As viewed from the hydrogeochemistry of Cretaceous groundwater in the south of Baiyu mountain of the Ordos basin, the article is focus on the groundwater horizontal distribution and the water chemistry about surface water base-flow.By combined with the geology structure frame and lithofacies paleo-geography,the authors study the recharge, runoff and discharge of the region. By analysis them, the authors can draw conclusions: the region has horizontal distribution of Cretaceous groundwater hydrogeochemistry from east and north and southwest to center. And the more complex the water quality is and the higher the TDS istoward the center of basin; the change of water quality in the Malian river indicate that groundwater of the east and west side recharges the river. The authors consider that the east and the southwest area in the southern parts of Ordos basin is groundwater recharge range, the center is discharge, the Tianhuan syncline and the Malian river valley is discharge passage.更多还原