华北地台东部寒武系崮山组(古丈阶)研究新进展  

NEW PROGRESS ON THE STUDY OF THE CAMBRIAN KUSHAN FORMATION (GUZHANGIAN) IN EASTERN NORTH CHINA PLATFORM

作　　者：任咣营 袁金良 孟凡巍[4] 高健 赵艳 郭颖[1] 杨飞[1] REN Guang-ying;YUAN Jin-liang;MENG Fan-wei;GAO Jian;ZHAO Yan;GUO Ying;YANG Fei(Institute of Geology and Paleontology,Linyi University,Linyi 276000;State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008;Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education,China University of Mining and Technology,Xuzhou 221116;Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008)

机构地区：[1]临沂大学地质与古生物研究所,山东临沂276000 [2]中国科学院南京地质古生物研究所,现代古生物学和地层学国家重点实验室,江苏南京210008 [3]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221116 [4]中国科学院南京地质古生物研究所,江苏南京210008

出　　处：《地层学杂志》2020年第3期310-325,共16页Journal of Stratigraphy

基　　金：现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)开放课题基金(183119);煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金(2018-001);国家自然科学基金(41688103)共同资助。

摘　　要：本文以山东济南市九龙山剖面为主剖面,考察了山东、河北、安徽、辽宁等地的12条剖面,经对比和综合研究,对崮山组的岩石地层和生物地层进行了重新界定。崮山组底界以灰色或青灰色页岩夹灰色薄层瘤状灰岩出现为标志(在九龙山剖面为第93层);而顶界划在浅灰色竹叶状灰岩夹页岩之上,以暗红色和深灰色薄层含海绿石灰岩的底部(在九龙山剖面为第152层)作为炒米店组的开始。在华北地台的东区,本研究将崮山组(自下而上)划分为9个三叶虫带(组合带):Damesella paronai-Ajacicrepida ajax组合带;Damesella paronai-Teinistion typicalis组合带;Wongia(=Cyclolorenzella或Jiulongshania)rotundata带;Wongia triangulata带;Wongia subcylindrica带;Wongia regularis带;Neodrepanura-Liostracina tangwangzhaiensis组合带;Neodrepanura premesnili带和Diceratocephalus armatus带。此外,在炒米店组底部新建了Liostracina simesi-Placosema convexa组合带,作为华北地台崮山阶(古丈阶)最上部的一个三叶虫带。为不同地区和相区的同期地层对比提供了宝贵资料,具有十分重要的科学意义。Based on the new investigation and new material collected from the Jiulongshan section(Laiwu City),Julinshan section(Feixian County)of Shandong Province,Bianbishan section(Tangshan City)of Hebei Province,and Baijiashan section(Wafangdian City)of Liaoning Province,the lithostratigraphy and biostratigraphy of the Kushan Formation is revised.The lower boundary of the Kushan Formation is defined at the first appearance of grey,green-grey shale intercalated with grey,thin-bedded nodular limestone(Layer 93 in Jiulongshan section).The upper boundary of the Kushan Formation is placed on the light grey,thin-bedded edgewise limestone intercalated with grey shale,and base of the first appearance of the dark red to dark grey,thin-bedded glauconitic limestone(Layer 152 in Jiulongshan section)which characterizes the overlying Chaomitien Formation.Nine trilobite zones(including assemblage zones)are established for the Kushan Formation,which are(in ascending order):1)Damesella paronai-Ajacicrepida ajax Assemblage Zone;2)Damesella paronai-Teinistion typicalis Assemblage Zone;3)Wongia(=Cyclolorenzella or Jiulongshania)rotundata Zone;4)Wongia triangulata Zone;5)Wongia subcylindrica Zone;6)Wongia regularis Zone;7)Neodrepanura-Liostracina tangwangzhaiensis Assemblage Zone;8)Neodrepanura premesnili Zone;9)Diceratocephalus armatus Zone.Additionally,a new assemblage zone,the Liostracina simesi-Placosema convexa Assemblage Zone,is established here for the basal Chaomitien Formation,which represents the uppermost trilobite zone of the Kushanian Stage(Guzhangian)in North China Platform.The present study have the vital scientific significance to provide critical new information for the correlation of coeval strata in different region or different facies.

关 键 词：华北地台 崮山组 古丈阶 岩石地层 生物地层 穿时性 

分 类 号：P534.1[天文地球—古生物学与地层学]