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根据沉积相分析,同时综合分析区域地质资料,笔者提出河南商城—固始地区石炭系及安徽金寨地区梅山群为典型前陆磨拉石含煤建造,其沉积相主要为滨海、潮坪、泻湖、局限台地及砾质辫状河—冲积扇相,代表了统一的石炭纪—二叠纪合肥弧后前陆盆地的南部边缘相,说明大别地块(北大别弧)于早古生代晚期—晚古生代早期即与华北板块碰撞拼结成一体。
According to the analysis of sedimentary facies and the comprehensive analysis of regional geological data, the authors propose that the Carboniferous in the Shangcheng-Gushi area of Henan Province and the Meishan Group in Jinzhai area of Anhui Province are typical molasse coal-bearing formations. The sedimentary facies are mainly the coastal sea, Lagoons, confined platforms and gravel braided river-alluvial fan facies represent the southern edge of the Permian-Permian Hefei backarc foreland basin, indicating that the Dabie block (North Dabie arc) was formed in the late Paleozoic - Early Late Paleozoic collision with the North China plate into one.