摘要
研究区地处河北省的西南部,太行山中南段的东麓,在大地构造位置上隶属于华北地台二级构造单元山西台隆的东部。中元古代长城系剖面连续完整,沉积层序清晰,沉积构造明显,是分析沉积环境的极佳区域。通过对临城地区中元古代长城系沉积相进行详细研究,得出其形成于受波浪和潮汐作用为主的沉积环境,以波浪为主的结论。沉积特征以发育大量的浪成层理及波痕,同时发育了潮汐作用的滨海浅滩相沉积特征为主。建立了滨海浅滩相的浪成斜层理与潮汐水流的砂岩沉积的发育特征的沉积模式。
The study area is located in the southwest of Hebei Province, at the eastern foot of the mid-southern section of Taihang Mountain, and belongs to the east of Shanxi Tailong, the second tectonic unit of the North China Platform. The middle Proterozoic Changcheng system is an excellent area for analyzing the sedimentary environment because of its continuous and complete section, clear sedimentary sequence and obvious sedimentary structure. The sedimentary facies of Changcheng system in Mesoproterozoic in Lincheng area is studied in detail, and it is concluded that the Changcheng system was formed in a sedimentary environment dominated by waves and tides. The sedimentary characteristics are mainly the development of a large number of wave-forming beddings and wave marks, as well as the coastal shoal facies sedimentary characteristics of tidal action. A sedimentary model is established for the development characteristics of wave-shaped oblique bedding and tidal flow sandstone deposits in coastal shoal facies.
