摘要
根据辽河群地质特征，岩石化学，稳定同位素特征分析认为：浪子山组沉积期方环境为浅海潮坪相；里尔峪组沉积期为强氧化泻湖相；高家峪组沉积期为强还原环境的泻湖相；大石桥组沉积环境为低能、还原环境的滨海碳酸盐台地相；盖县组沉积期为开阔正常浅海潮坪相。辽河群从发生发展到结束古环境演化规律是：构造上由优地槽向冒地槽演变；气候上由炎热转变为温湿；古地理环境从有障壁的局限海变为无障壁的开阔海，从咸化海向正常海，从泻湖相向潮坪相转化。物质补给由火山为主转为陆源碎屑为主。
On the basis of analysis to geological characters,lithochemistry,stable isotope characters of the Liaohegrope,it is considered that the paleoenvironments were shallow-sea tidal flat facies in the sedimentary stage of theLangzishan group;lagoonal facies with strong oxidation in the sedimentary stage of Gaojiayu group;littoral car-bonate platform facies of the Dashiqiao group in low energy and reduction environment;and normal open shallow-sea tidal flat facies in the sedimentary stage of the Gaixian group.The evolution regularities in paleoenvironmentof the Liaohe group from the begining to the end were structurally from eugeosyncline to miogeosynchine,climat-ically from scorching to warm and moist,from local sea with barrier to open sea without barrier in paleo-geographical environment,from salty sea to normal sea,from lagoonal facies to tidal falt facies,Feeder materialswere mainly from volcanic material changed tO be continentals clastic materials.
出处
《矿产与地质》
1994年第6期433-439,共7页
Mineral Resources and Geology
关键词
辽河群
泻湖相
沉积期
古环境
Liaohe group,Eugeosyncline,Barrier,Local sea
Open Sea,Lagoonal facies,Tidal facies.
