苏北盆地阜二、四段鱼化石及其沉积环境  

Fossil fishes of the second and fourth members of Funing Formation in Subei Basin and their sedimentary environment

作　　者：管永明 张江永[2] 刘成杰[1] 段宏亮[1] 王红伟[1] 谢献德 GUANYongming;ZHANG Jiangyong;LIU Chengjie;DUAN Hongliang;WANG Hongwei;XIE Xiande(Exploration and Development Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China;Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Science,Beijing 100044,CAina)

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,江苏扬州225009 [2]中国科学院古脊椎动物与古人类研究所,北京100044

出　　处：《复杂油气藏》2021年第1期1-8,共8页Complex Hydrocarbon Reservoirs

基　　金：中国石化科技部项目“苏北盆地致密油形成条件与勘探潜力研究”(P18060-4);中国科学院国际合作局对外合作重点项目(132311KYSB20170022)。

摘　　要：对苏北盆地新发现的鱼化石进行初步研究,探讨了含鱼地层阜二、阜四段的时代和沉积环境。阜宁组鱼化石分为两个组合,即下部阜二段的鲤科-鲿科-鲱科组合和上部阜四段的洞庭鳜-始舌齿鱼组合。下部组合与三水盆地古新统莘庄村组至心组的洞庭鳜鱼群相当,阜二段的时代应为古新世;上部组合与三水盆地始新统华涌组骨舌鱼类鱼群和渤海沿岸始新世的双棱鲱-艾氏鱼-洞庭鳜组合相当,阜四段的时代应为始新世。阜二段的鲤科、鲿科和鲱科分别代表了这三科鱼类的最早化石记录。阜宁组产有与海水有关的鲱科、洞庭鳜以及大型海鸟化石,说明阜宁组沉积时受到海水的影响。阜二、阜四段所产介形虫有淡水的(金星介科),也有见于海洋的(新单角介)。在岩性方面,泥岩夹灰岩和白云岩是湖相夹海相的产物。据此推测,苏北盆地阜二、四段沉积时湖盆曾多次遭受海侵。The fish fossils newly discovered in Subei Basin were preliminarily studied.The age and sedimentary environment of the fish-bearing the second and fourth member of Funing Formation was discussed.The fish fossils of Funing Formation can be divided into two assemblages,i.e.Cyprinidae-Bagridae-Clupeidae in the second member and Tungtingichthys-Eohiodon in the fourth member of the formation.The assemblage Cyprinidae-Bagridae-Clupeidae is similar to Tungtingichthys fauna of Paleocene Xinzhuangcun and Buxin Formations of Sanshui Basin.Therefore,the age of the second member of Funing Formation can be considered as Paleocene.The assemblage Tungtingichthys-Eohiodon is similar to osteoglossid fauna of Eocene Huayong Formation of Sanshui Basin and Diplomystus-Knightia-Tungtingichthys of Eocene Shahejie Formation of Bohai Gulf Region.The age of the fourth member of Funing Formation can be considered as Eocene.The Cyprinidae,Bagridae and Clupeidae in the second member of Funing Formation represent the earliest fossil records of these three families,respectively.The Funing Formation yields clupeidae,Tungtingichthys and flying seabird which are related to the sea indicating that the basin was influenced by seawater when the formation was deposited.The ostracods from the second and fourth members of Funing Formation include both freshwater(cypridids)and marine taxa(Neomonoceratina).In lithology,the mudstone intercalated with limestone and dolomite shows that the lacustrine sediments are influenced by marine.The sedimentary environment of the second and fourth members of Funing Formation in Subei Basin should be interpreted as a lake occasionally transgressed by sea water.

关 键 词：鱼化石 鲤科 鲿科 鲱科 沉积环境 海侵 古新世 苏北盆地 

分 类 号：P52[天文地球—古生物学与地层学]