摘要
保山金鸡剖面丁家寨组下部含砾层的双层结构特征与不同的地质作用有关:下部砾岩层为滨海相砾岩;上部角砾状灰岩由碎屑流产生。所产遗迹化石指示滨海相环境。根据保山地区丁家寨组的颗粒成分、胶结物及地球化学特征。
The pebble bearing layerin the lowerpartofthe Dingjiazhai Formation in Jinji section,in Baoshan region ofwestern Yunnan,can be divided in to two parts:the pebble bed ofnormallittoralfaciesbelow and the brecciated limestone above.Thetrace fossil Ti soa jinjiensis from the superstratum ofthe pebble bearing layer may be attributed to the Skolithosichnofacies,indicating a high water energy littoralenvironments.The abundant and diverse fossils(corals,fusulinids,etc.) ,the characteristics of cements in the lime stonesand the thick and stablegypsum bed indicatethatthe Dingjiazhai Formation wasde posited in warm waterenvironments.
出处
《地层学杂志》
CSCD
北大核心
1999年第3期182-189,T002,共9页
Journal of Stratigraphy
基金
国家自然科学基金!项目 ( No.4 96 72 1 47)研究成果之一
关键词
丁家寨组
碎屑流
遗迹化石
古水温
石炭纪
云南
Dingjiazhai Formation,debris flow,trace fossil,littoralfacies,stable iso tope,warm water,Carboniferous,Yunnan
