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白垩纪鄂尔多斯盆地在燕山期抬升—沉降及气候演变的背景条件下,受水力、风力等地质作用,经历了早白垩世宜君—洛河期→环河期与罗汉洞期→泾川期两个沙漠沉积演化阶段。其中,洛河期和罗汉洞期是沙漠发育的两个主要时期,形成了旱谷、沙丘、丘间及沙漠湖等多类型沙漠亚相碎屑岩沉积。沙丘沉积砂岩作为白垩系沙漠相最主要的沉积岩石,具有分布稳定、厚度巨大、含盐量低、孔隙空间发育、储水性和透水性强等特点,不但具有良好的地下水赋存和循环条件,而且一般赋存着水质较好的地下水。
Under the background of the Yanshan uplift-subsidence and climate evolution, the Ordos Basin of the Cretaceous underwent hydrothermal and wind-induced geological changes and underwent the Early Cretaceous period of the Yijun-Luohe Period → the He’he Period and the Luohan Period → Jingchuan Period Desert sedimentary evolution stage. Among them, the Lohe and Lohan Dynasties are two major periods of desert development, forming sediments of various types of desert subfacies clastic rocks in the wadi, dune, dune and desert lake. Dune sandstone, as the most important sedimentary rock in the Cretaceous desert facies, has the characteristics of stable distribution, huge thickness, low salinity, pore space development, water storage and permeability. It not only has good groundwater storage and circulation conditions, And the general presence of better water quality groundwater.