摘要
南秦岭早古生代盆地中心在紫阳安康一带。盆地沉积充填可划为两个Ⅱ级层序和五个Ⅲ级层序,在层序Ⅰ和层序Ⅳ黑色岩系中,重晶石、毒重石产于海侵体系域与高水位体系域转换界面附近。盆地演化包括初始沉降期、过渡沉降期、稳定沉降期、强烈沉降期、盆地萎缩期五个阶段。
The early Paleozoic basin center of the South Qinling is located in the area of Ziyang and Ankang.The sedimentary basin can be classified into two sequences atⅡ-class and five at Ⅲ-class.In black rock series existing in sequence I and sequence IV,barite and witherite occur near by the conversion interface between the transgression and the highstand systems.The basin evolution experienced five stages from initial subsidence(∈1 including some Z2) to transitional(late∈1-∈3)-stable(O1-early O3)-intensive(late O3-early S1)subsidence and atrophy period(late S1-S3)of the basin.
引文
[1]刘树根,李智武等.大巴山前陆盆地—中断带的形成演化[M].北京:地质出版社,2006.
[2]邵龙义鲁静汪浩张鹏飞。中国含煤岩系层序地层学研究进展[J].沉积学报,第27卷第5期2009:27(5)904~914.
[3]李思田等.鄂尔多斯盆地东北部层序地层学及沉积体系分析[M].北京:地质出版社,1992.
[4]苏春乾,胡建民,李勇,刘继庆。南秦岭地区存在两种不同构造属性的耀岭河群[J].岩石矿物学杂志,第25卷第4期2006年7月.
[5]张国伟,孟庆任,赖绍聪.秦岭造山带的结构构造[J].中国科学,B辑,1995,25(9):994~1003.