摘要
湖北松滋刘家场下奥陶统碳酸盐岩中发育多层风暴沉积,据风暴岩的结构及成因特征可划分出3种剖面结构类型,它们分别形成于正常浪基面以上(Ⅰ型)、正常浪基面与风暴浪基面之间(Ⅱ型)及风暴浪基面以下(Ⅲ型)。红花园组中藻岩隆礁皆殖基于Ⅲ型风暴岩之上,风暴作用也许为生物礁的形成创造了有利的环境。
Well developed multiple-tempestites are discovered within the Lower Ordovician in the western Hubei. According to different sedimentary structures of the tempestites, type Ⅰ consists only of big intraclast and extraclast, which can be interpreted as storm-current deposits or storm-tidal channel-filled deposits formed in a high-energy zone above normal wave base. Type Ⅱ can be a contrast to typical tempestites and. it might represent deposits between normal and storm wave base. The most marked feature in type Ⅲ is that the intraclast at the bottom differs from underlying rock (shale) in component and is a kind of allochthonous sediment. Type Ⅲ is probably formed by storm back-flow in low-energy condition below storm wave base and it is the deepest storm deposits in the area.
出处
《江汉石油学院学报》
CSCD
北大核心
1993年第2期9-14,共6页
Journal of Jianghan Petroleum Institute
关键词
沉积
碳酸盐岩
风暴沉积
早奥陶世
sedimentology
carbonate
sedimentary petrology
[tempestites]
early Ordovician
(western Hubei)
