摘要
下扬子盆地 ( L YB)石炭系碳酸盐岩发育 ,粗晶灰岩的 Sr含量最低 ,白云岩的 Sr含量较低 ,石灰岩的 Sr含量较高。石炭系碳酸盐岩的 Sr含量为 199× 10 - 6,属于稳定石灰岩的低 Sr组。Na、Mn的分布比较类似 ,和州组碳酸盐岩有最高的 Na( 4 50× 10 - 6)、Mn( 12 2 4× 10 - 6)含量 ,金陵组灰岩有较高的 Na( 2 89× 10 - 6)、Mn( 972× 10 - 6)含量 ,黄龙组和船山组碳酸盐岩有较低的 Na( 12 0× 10 - 6、150× 10 - 6)、Mn( 172× 10 - 6、192× 10 - 6)含量。从泻湖 -潮坪→局限台地→开阔海台地 ,Na、Mn含量是递减的。在碳酸盐岩台地中 ,台内滩相 Na、Mn含量最低 ,而台盆相 Na、Mn含量较高。沉积环境、陆源碎屑以及有机质的含量不同程度地影响 Na、Mn分布。
The Carboniferous carbonate rocks develop in Lower Yangtze Basin(LYB).The distribution of Sr indicates that the coarse crystal limestone has the lowest concentrations, the dolomite rocks have lower concentrations, and the limestone has higher concentrations. The concentration of Sr in Carboniferous carbonate rocks is 199×10 -6 which is part of the lower Sr group of stable limestone. The distributions of Na and Mn are some similar. The carbonate rocks of Hezhou Formation have the highest concentrations of Na(450×10 -6 )and Mn(1 224×10 -6 ), the limestone of Jinling Formation has higher concentrations of Na(289×10 -6 )and Mn(972×10 -6 ), and carbonate rocks of Huanglong and Chuanshan Formations have lower concentrations of Na(120×10 -6 ,150×10 -6 )and Mn(172×10 -6 ,192×10 -6 ). The concentrations of Na and Mn are gradually lower from lagoon to limited platform and to open platform. Facies of the platform shoal has the lowest concentrations of Na and Mn, and facies of the platform basin has higher concentrations of Na and Mn. Sedimentary environment and the abundance of terrigenous substance and organic matter affects the concentrations of Na and Mn differently.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
2000年第5期654-659,共6页
Journal of Hefei University of Technology：Natural Science
基金
"八五"国家重点科技攻关项目!( 85- 90 1- 0 3- 0 8B)
