鄂尔多斯盆地早白垩世岩相古地理与地下水水质和分布的关系

Relations of the Early Cretaceous lithofacies-paleogeography to groundwater quality and distribution in the Ordos basin

摘要: 岩相古地理与地下水水质的关系研究表明,早白垩世鄂尔多斯盆地经历了干旱—半干旱→相对湿润的2个气候变化旋回和以沙漠相发育→湖泊相发育为特征的2个岩相古地理演化阶段。气候和古地理条件及其演化导致白垩纪沉积水体盐度、沉积岩含盐量和地下水循环条件的区域分布极为复杂。在岩相古地理和其他水文地质条件的综合影响下,盆地白垩系地下水水质和分布较为复杂,总体呈北好南差、盆地南部东好西差和下好上差的区域性分布规律。

Abstract: Study of the relation between lithofacies-paleogeography and groundwater quality indicates that the Early Cretaceous Ordos basin has experienced the cycles from the arid-semiarid climate to relatively humid climate and the stages of lithofacies-paleogeogr