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在秦岭、大别山以南,龙门山、哀牢山以东的我国南方大陆,下石炭统为一套海相碳酸盐岩—碎屑岩建造,从沉积学角度来看,可做为清水—浑水混生沉积的代表。笔者试图从沉积相划分、沉积相的基本特征论述入手,探讨华南地区下石炭统清水碳酸盐岩—浑水碎屑岩的沉积模式。目的在于引起对“混生沉积模式”的关注和讨论。一、华南下石炭统沉积相特征华南下石炭统主要由一套暗色薄—中厚层状的砂、泥岩、微晶灰岩、各种颗粒灰岩以及泥灰岩与硅质岩等组成。地层厚度变化大,由几十米至1600m。生物以珊瑚和腕足类为主,
In the Qinling Mountains, south of the Dabie Mountains, Longmenshan and Ailao Mountains to the south of China, the Lower Carboniferous is a set of marine carbonate-clastic rocks. From sedimentology perspective, it can be used as a clear water- Muddy water mixed deposition on behalf of. The author attempts to discuss the basic characteristics of sedimentary facies division and sedimentary facies to discuss the sedimentary model of the Lower Carboniferous clear water carbonate-muddy water clastic rocks in South China. The purpose is to arouse the concern and discussion on the “mixed sedimentary model”. Characteristics of the Lower Carboniferous Sedimentary Facies in South China The Lower Carboniferous in South China consists mainly of a set of dark-thin, medium-thick sand, mudstone, microcrystalline limestone, various particulate limestones, marl and chert. Strata thickness changes, from tens of meters to 1600m. Creatures mainly corals and brachiopods,