沉积与特提斯地质2012，Vol.32Issue(3)：64-74,11.
鄂尔多斯盆地白垩系主要含水岩组沉积岩相古地理对地下水水化学场形成和水质分布的影响
The effects of sedimentary facies and palaeogeography on the formation and distribution of the deep groundwater of the Cretaceous strata in the Ordos Basin
摘要
Abstract
The integration of sedimentary geological and hydrogeological survey and sample analysis of the representative Cretaceous hydrological boreholes and outcrops has disclosed that during the formation of the Cretaceous aquifers, the fluvial deposits were wide-spread in the Huanhe and Luohe Formations in the northern part while the lake deposits occupied in the Huanhe Formation, and desert deposits occurred in the Luohe Formation in the southern part of the Ordos Basin. The framework of sedimentary facies and palaeogeography has exercised a major control not only on mineral compositions such as feldspar, clay minerals, calcite and gypsum in the aquifer systems, soluble salt contents and their spatial distribution, but also on the spatial distribution of the aquifers and impermeable beds, regional distribution of the deep groundwater circulation and alternation. The water-rock interactions influencing the formation of the hydrochemical fields and distribution of the groundwater include the dissolution of sulfate minerals, carbonate minerals and silicate minerals,rock salt leaching and cation exchange. Controlled by sedimentary facies and palaeogeography, groundwater circulation and water-rock interaction, the groundwater from the Huanhe and Luohe Formations are characterized by lower TDS, enriched freshwater and dominant HCO3-type in the northern part whereas higher TDS, enriched brackish water-saline water, and HCO3 · SO4-type in the southern part of the basin.关键词
鄂尔多斯盆地/洛河组和环河组/沉积岩相古地理/含水岩石矿物和化学组成/水-岩作用/地下水水化学场形成与水质分布Key words
Ordos Basin/ Huanhe and Luohe Formations/ sedimentary facies and palaeogeography/ mineral and chemical compositions of the aquifers/ water-rock interaction/ formation of the hydrochemical fields and distribution of the groundwater分类
天文与地球科学引用本文复制引用
谢渊,邓国仕,刘建清,董维红,鲁洪江..鄂尔多斯盆地白垩系主要含水岩组沉积岩相古地理对地下水水化学场形成和水质分布的影响[J].沉积与特提斯地质,2012,32(3):64-74,11.基金项目
"油气藏地质及开发工程"国家重点实验室基金项目(PLC200803)、国家自然科学基金项目(40872085、40302020)、国土资源大调查项目(200112100006、1212010331302ZT1-2)及四川省杰出青年学科带头人培养计划项目(07ZQ026-037)联合资助 （PLC200803）
