【摘要】 系统研究闽西南上杭、宁化、龙岩等地的上石炭统生物地层,通过对各地生物地层的划分和对比,揭示该白云岩层的空间分布特征.文中认为,闽西南上石炭统中的白云岩层的沉积时限,分别在南北(上杭至宁化)和东西(上杭至龙岩)方向上存在着横向变化;白云岩层是在晚石炭世滑石板期至逍遥期,沿下石炭统林地组基底碎屑岩地层的接触界面而发育的穿时沉积层;晚石炭世时期形成的铁、锰层控矿床,特别是"马坑式铁矿"与该套白云岩层关系密切.最后,根据其含矿性等的分析,认为该套地层可以作为寻找福建省石炭纪铁、锰层控矿床的找矿标志.更多还原

【Abstract】 This article,based upon a systematic analysis of the Upper Carboniferous biologic stratum of several regions of Southwestern Fujian such as Shanghang,Linghua, Longyan etc.,and with the use of delimitation as well as comparison among these regional biologic strata,demonstrates the spatial nature of Dolomite Stratum, puting forwards that there exists transverse differentiation in sediments between south-north direction(from Shanghang to Linghua) and west-east direction(from Shanghang to Longyan).In the end,Dolomite Stratum subjects to under Carboniferous stratum from Huashiban period to that of Xiaoyao which moves along the counter-surface of Lindi unit of Under Carboniferous and go straight to the sedimentary stratum.The iron and manganese deposit of Late Carboniferous Period especially that of Makeng iron ore is of close relationship with the Dolomite Stratum by the analysis upon stratum material elements,it shows that this whole stratum will be the indicator for locating Carboniferous iron and manganese deposit.更多还原