摘要
通过对三峡地区志留纪纱帽组的系统研究 ,在不同层位上 ,划分出了砂质、灰质、钙屑、含磷质等 4种类型风暴岩。经过其结构特征、沉积序列、沉积相等分析 ,认为砂质风暴岩和含磷质风暴岩隶属近源风暴岩 ,灰质风暴岩隶属远源风暴岩 ,钙屑风暴岩则属于上述两者间的过渡类型。研究区内 4种类型的风暴岩在横向上分布广 ,纵向上风暴作用持续时间短 ,沉积速率大 ,并且结构特征明显 ,便于追索和对比 。
Four types of tempestites have been found in different horizon of the Silurian Shamao Formation in eastern Sichuan and western Hubei,i.e.,Sandy tempetute,Calcareous tempestite,Calcarenaceous tempestite and Phosphatic bearing tempestite. Based on analyzing of texture,sedimentary sequence ,sedimentary facies,the sandy tempestute and phosphoric bearing tempestite belong to Proximal type,the calcareous tempestite belong to distal type,and the calcarenaceous tempestite belong to a transition type. The four types of tempestite is characterized by widespread and fast deposition, and can be regarded as an synchronous indicative layers for stratigraphic correlation.
出处
《华南地质与矿产》
CAS
2000年第1期43-52,共10页
Geology and Mineral Resources of South China
