山东济南—淄博地区寒武系风暴岩及其研究发展

Research and Development of Cambrian Storm Rocks in Ji'nan—Zibo Area in Shandong Province

摘要:

晚寒武世，华北地台不仅为克拉通内稳定的浅海沉积环境，且处于低纬度赤道飓风带控制之下，风暴作用频繁，风暴沉积极其发育，在该区的上寒武统地层中留下了丰富的风暴沉积记录。风暴岩广泛分布于九龙群炒米店组，据砾屑来源与其沉积环境，砾屑灰岩（风暴岩）分为原地型砾屑灰岩和异地型砾屑灰岩。结合该区的风暴沉积特征，将风暴成因的砾屑灰岩形成机制概括为风暴涨潮流—回流、风暴漫流和风暴旋流3种。

Abstract:

During the late Cambrian, the north China platform is not only in a stable shallow sea cratonic environment, but also under the control of the low latitude equatorial hurricane zone. Storm action is frequent, and storm deposits and their development left rich records of storm deposits in the upper Cambrian strata of the area. Storm rocks are widely distributed in Chaomidian formation. According to the source of gravel and its sedimentary environment, gravel limestone (storm rocks) can be divided into in-situ gravel limestone and allochthonous gravel limestone. Based on the sedimentary characteristics of the storm in this area, the formation mechanism of the gravel limestone caused by the storm are divided into three types, they are storm upwelling reflux, storm overflow and storm vortex.