徐州吴桥—张圩地区新元古界地层特征与平衡地质剖面研究  

Study on the Neoproterozoic Strata and Balanced Cross Section of the Wuqiao Zhangwei Region, Northern Jiangsu

作　　者：张庆龙[1] 吴俊奇[1] 孔庆友[1] 刘家润[1] 曾家湖[1] 潘国强[1] 刘道忠[1] 

机构地区：[1]南京大学地球科学系,江苏南京210093

出　　处：《地层学杂志》2000年第2期132-135,共4页Journal of Stratigraphy

基　　金：.NULL.

摘　　要：徐州铜山吴桥—睢宁张圩一带主要出露一套新元古代地层 ,包括贾园组、赵圩组、倪园组和九顶山组 ,贾园组未见底、九顶山组未见顶。贾园组主要为灰色薄—中厚层细砂质、粉砂质泥质微晶灰岩 ,赵圩组主要为中厚层微晶灰岩 ,倪园组主要为薄层—中厚层微晶白云岩和灰岩 ,九顶山组主要为中厚层微晶白云岩。岩层受推覆构造运动影响强烈变形 ,褶皱和断裂构造发育 ,文中运用平衡地质剖面方法 ,对二朗山—宋湾剖面进行了平衡后得出该区造山运动缩短量为 3 .0 km ,缩短率为 15 %。The Neoproterozoic strata, including the Jaiyuan, Zhaowei group, Niyuan and Jiudingshan Formations, are well developed and exposed around the Wuqiao Suining Zhangwei region in the Xuzhou area, northern Jiangsu. Lithologically, the Jiayuan Formation consists mainly of thin to medium bedded, sandy and silty gray microcrystalline limestone; the Zhaowei and the Niyuan Formations are composed respectively of medium to thick bedded microcrystalline limestone and thin to medium bedded microcrystalline dolomite and limestone. The Jiudingshan Formation is primarily medium bedded microcrystalline dolomite. However, Neoproterozoic strata in this region were strongly influenced by the tectonic movement, particularly by the effect of napping and thrusting. The faulting and folding are extensively deve loped in the Neoproterozoic strata of this region. The results of this study, by balancing sections across the region, demonstrate that orogenesis has shortened of the Neoproterozoic strata by about 15%.

关 键 词：徐州市 江苏地层 平衡剖面 推覆剖面 新元古代 

分 类 号：P534.3[天文地球—古生物学与地层学] P542.3[天文地球—地质学]