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豫西登封地区下三叠统刘家沟组及和尚沟组系一套河湖相沉积,通过沉积特征和沉积序列分析,建立了8种类型的沉积序列,并在该套地层中发现丰富的陆相遗迹化石,已鉴别出8个遗迹属10个遗迹种。根据遗迹化石的组成、产状和分布特征,建立了3种遗迹组合:1)Scoyenia遗迹组合,出现于周期性暴露的极浅水河漫滩及小型河漫湖泊环境;2)Arenicolites遗迹化石组合,产生于水体较动荡的滨湖沉积环境;3)Taenidium-Planolites遗迹化组合,形成于水体较平静的浅湖沉积环境。基于沉积特征、沉积序列及伴生遗迹化石组成与分布特征的综合分析,提出了该区早三叠世地层中遗迹化石组合的沉积环境模式。
The Lower Triassic Liujiagou Formation and the Heishangou Formation in the Dengfeng area, western Henan Province, are a set of river-lacustrine facies. Through the sedimentary characteristics and sedimentary sequence analysis, eight types of sedimentary sequences have been established and are abundantly found in the set of strata Of the terrestrial fossil remains, has identified eight relics belonging to 10 relics. According to the composition, occurrence and distribution characteristics of trace fossils, three relic combinations have been established: 1) Scoyenia relic assemblage appeared in the periodically exposed shallow and shallow river floodplain and small river and lake environment; 2) Arenicolites trace fossil assemblage, The more turbulent waterside lacustrine sedimentary environment; 3) Taenidium-Planolites relics formation, formed in a more calm water lake sedimentary environment. Based on the comprehensive analysis of sedimentary characteristics, sedimentary sequence and composition and distribution of associated trace fossils, a sedimentary environment model of trace fossil assemblages in the Early Triassic strata of the area is proposed.