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

作　　者：谢渊[1] 王剑[1] 李明辉[1] 江新胜[1] 谢正温[2] 罗建宁[1] 侯光才[3] 刘方 王德潜[5] 孙永明 曹建科 朱桦[3] 王永和[3] 

机构地区：[1]中国地质调查局成都地质矿产研究所沉积与能源研究室,四川成都610082 [2]长庆石油勘探局孔下技术作业处,陕西西安710059 [3]中国地质调查局西安地质矿产研究所,陕西西安710054 [4]陕西省地质调查院,陕西西安710060 [5]陕西省国土资源厅,陕西西安710060 [6]宁夏地质调查院,宁夏银川750000

出　　处：《地质通报》2004年第11期1094-1102,共9页Geological Bulletin of China

基　　金：国家自然科学基金项目(40302020);中国地调局项目<鄂尔多斯盆地白垩纪岩相古地理与地下水形成条件研究>资助。

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。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-paleogeographic evolution characterized by the change from desert facies development to lake facies development. The climatic and paleogeographic conditions and their evolution led to the very complex regional distribution of the salinity of Cretaceous sedimentary water bodies, salinity of sedimentary rocks and conditions of groundwater circulation. Under the combined influences of lithofacies-paleogeographic conditions and other hydrogeological conditions, the Cretaceous groundwater quality and distribution in the basin are complex, generally showing a regional distribution pattern, that is, groundwater quality is better in the north than in the south and is good in the east and poor in the west and good in the lower part and poor in the upper part in the south of the basin.

关 键 词：鄂尔多斯盆地 早白垩世 岩相古地理条件 地下水水质与分布特征 

分 类 号：P534.53[天文地球—古生物学与地层学] P641[天文地球—地质学]