江苏徐州大北望寒武系鲕粒及鲕粒灰岩特征

The Cambrian ooides and oolitic limestones in the Dabeiwang section in Xuzhou,Jiangsu

摘要: 徐洲大北望地区寒武系鲕粒灰岩层数众多,结构、类型复杂,形状多样,其中以放射鲕、同心鲕及放射一同心鲕为主。下寒武统多为生物鲕,中寒武统为同心一放射鲕且白云岩化,上寒武统中多为放射鲕,干裂鲕(或泥晶化),成因类型复杂。
- 寒武系 /
- 鲕粒灰岩 /
- 鲕粒特征
Abstract: The Cambrian oolitic limestones in the Dabeiwang section in Xuzhou,Jiangsu are characterized by numerous layers,complicated textures and types and diverse morpholo-gies.They are represented primarily by radial ooides,concentric ooides and radial-comcen-tric ooides.More precisely,the biogenic ooides appear in the Lower Cambrian strata,the concentric-radial ooides occur in the Middle Cambrian strata and are mostly dolomitized, and the radial and desiccated (or micritized) ooides are observed in the Upper Cambrian strata in the study area.
- Cambrian /
- oolitic limestone /
- characteristic