吉林蛟河盆地下白垩统大拉子组介形虫化石组合特征  

CHARACTERISTICS OF OSTRACODA FOSSIL ASSEMBLAGE OF THE LOWER CRETACEOUS DALAZI FORMATION IN JIAOHE BASIN,JILIN PROVINCE

作　　者：李国郡 陈宇 许国雨 郑大贺 王存柱 任龙 杨帆 叶蕴琪 毛永新 LI Guo-jun;CHEN Yu;XU Guo-yu;ZHENG Da-he;WANG Cun-zhu;REN Long;YANG Fan;YE Yun-qi;MAO Yong-xin(Mudanjiang Natural Resources Comprehensive Survey Center,CGS,Mudanjiang 157021,Heilongjiang Province,China;College of Resources and Environment,Jilin Agricultural University,Changchun 130118,China;Ningbo Institute of Oceanography,Ningbo 315832,Zhejiang Province,China)

机构地区：[1]中国地质调查局牡丹江自然资源综合调查中心,黑龙江牡丹江157021 [2]吉林农业大学资源与环境学院,吉林长春130118 [3]宁波海洋研究院,浙江宁波315832

出　　处：《地质与资源》2023年第1期14-20,共7页Geology and Resources

基　　金：中国地质调查局项目“东北内蒙古沿边及特殊地区地质矿产调查”(DD2016007801);“吉林大车背沟等8幅1∶5万矿产地质调查”(DD2020810)。

摘　　要：蛟河盆地内广泛出露下白垩统大拉子组,并在保家村附近产出介形虫、叶肢介和植物碎片等化石.通过1∶2000地质剖面实测中分层采集化石,在保家村北侧剖面的大拉子组中获得介形虫5属9种,其中包括1个相似种和6个未定种,分别是:Cypridea paracavernosa,C.concinaformis,C.sp.,Candoniella cf.candida,Candoniella sp.,Scabriculocypris sp.,Mongolianella sp.,Candona sp.1和Candona sp.2.结合前人的化石发现,建立了Cypridea paracavernosa-C.concinaformis组合,该介形虫组合可以与吉林延边大拉子组介形虫进行对比,时代可能为早白垩世晚期.The Lower Cretaceous Dalazi Formation is widely developed in Jiaohe Basin,with ostracoda,conchostraca and plant debris fossils occurred near Baojia village.Through the stratified fossil collection in 1∶2000 surveyed geological section,5 genera with 9 species of ostracoda are discovered from Daliazi Formation at the section on the north of Baojia village,including 1 similar species and 6 undefined species:Cypridea paracavernosa,C.concinaformis,C.sp.,Candoniella cf.candida,Candoniella sp.,Scabriculocypris sp.,Mongolianella sp.,Candona sp.1 and Candona sp.2,respectively.Combined with previous fossil findings,the Cypridea paracavernosa-C.concinaformis assemblage is established,which could be compared with the ostracoda of Daliazi Formation in Yanbian,Jilin Province,and the age was probably the late Early Cretaceous.

关 键 词：介形虫 早白垩世 大拉子组 蛟河盆地 吉林省 

分 类 号：P535[天文地球—古生物学与地层学] Q915.2[天文地球—地质学]