摘要
红层沉积环境多样,易溶盐会在一些区段富集形成含盐层。含盐层岩石矿物成分复杂,可溶岩和可溶性矿物含量较高,更易形成溶隙、溶孔,地下水类型以溶蚀裂隙孔隙水为主,水质复杂,水化学成分、含量与易溶矿物成分、含量关系密切。云南红层地下水勘查示范成果表明,滇中红层含盐层浅部全—强风化带含盐层容易淋滤沉着形成自封闭带,富水性较差,地下水位以下的中等—微风化带岩层透水性好,富水性强;含盐层区亦有可饮用淡水分布,补给、排泄条件好的裸露型含盐层中水质较好,循环条件差的埋藏型、覆盖型含盐层中水质较差;浅层地下水水质随深度的变化不明显。
The sedimentary environment of red beds is diversity, and soluble salt will enrichment form salt beds in some segments. The mineral composition of rocks in salt beds is complicated, and the contents of soluble rocks and soluble minerals are high which is easier to form solution cracks and dissolution pore. The type of groundwater is to corrosion fracture pore water in main. The water quality is complex, and the water chemical composition, contents and soluble mineral composition, content have close relationship. The demonstration results of groundwater exploration in Yunnan red beds indicates that the full-wide weathering zone sail beds of shal- low layer in central Yunnan red beds are easily calm the formation of self-enclosed tape which is poor-rich water, and the rock band of middle-tiny weathering zone below ＇groundwater has good permeability and rich waterborne; the salt beds district has also the distribution of potable water. The water quality is better in the exposed salt beds which have good conditions of recharge and discharge ; the water quality is poor in burial type and cover type salt beds which have poor cycle conditions; the shallow groundwater quality is not obvious with depth changes.
出处
《云南地理环境研究》
2009年第6期1-7,共7页
Yunnan Geographic Environment Research
基金
中国地质调查局"云南红层严重缺水地区地下水勘查示范"(200310400029)
关键词
滇中红层
含盐层
水文地质
Central Yunnan red beds
salt beds
hydro-geological
