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长江下游地区石炭系白云岩段的层位与时代问题,是地质界比较关注的问题之一。自1959年夏邦栋提出其层位可能相当于苏联的纳缪尔阶并取名为“老虎洞白云岩”以来,历经肖立功、陈敏娟、黄建辉、杨敬之、盛金章等的研究,以及江苏、安徽二省区调队的工作,已取得不少的成果。但目前尚存在分歧,如:它到底是晚石炭世早期还是早石炭世晚期?是一层还是两层?为什么在不同地点岩性相同而化石内容相异?由于白云岩段涉及铜铁矿床的赋存,因此解决这一问题,在生产上具有实际意义。
The stratigraphic position and epochal problems of the Carboniferous dolomite in the lower reaches of the Yangtze River are one of the more concerned issues in the geological field. Since 1959 Xia Bodong proposed that its horizon may be equivalent to the Soviet Union’s Nami Mule and named “tiger cave dolomite”, after Xiao Ligong, Chen Minjuan, Huang Jianhui, Yang Jingzhi, Sheng Jinzhang and other studies, and Jiangsu, Anhui two Provincial transfer team work, has achieved a lot of results. However, there are still differences, such as: Is it in the late Early Carboniferous or Early Carboniferous? One or two layers? Why is the same lithology in different locations and different fossil content? As Dolomites involving copper and iron deposits Therefore, to solve this problem, it has practical significance in production.