摘要
福建侏罗纪地层广泛分布,本文通过大量野外调查和资料综合分析,着重论述了福建侏罗纪地层分区、地层划分和代表性剖面的层序、岩性以及生物群特征。对福建早、中侏罗世岩相古地理概况作了简略论述。福建侏罗纪地层分区,划分为含有海相地层的闽中-闽西南地层小区,该区早侏罗世火山岩发育。陆相地层的闽北地层小区以及中侏罗统发育较好的闽西地层小区。下侏罗统生物群,双壳类在下部为海相的 Parainoceramus-Hunanonectes 动物群,上部为 Qiyangia 动物群;陆相植物下部为 Otozamites-Thinnfeldia 植物群,上部为 Conipters-Phoenicopsis 植物群;叶肢介下部为 Euestheria shandanensis-Palaeolimadia hojiensis 动物群,上部为 Eosolimnadiopsis-Asiolimnadiopsis 动物群;介形类下部为 Gomphocythere rhomboidalis-G?yubacumensis 组合,早侏罗世早期还含有菊石 Arietites 和 Coroniceras。中侏罗统生物群,植物组合不太明显,双壳类 Pseudocardinia-Tutuella 动物群,其中下部含有 Cuneopsis-psilunio-Eolamprotella 动物群;叶肢介为 Euestheria yanjiawanen-sis-E·camplanata 动物群;介形类在中下部为 Darwinella sarytirmanensis-D·magna 组合。此外,本文概述了福建早侏罗世南海北陆的古地理面貌。
The jurassic strata was extensive distribution in Fujian.Based on a large amount of field investigations and data ana-lysis,it has been discussed in present paper that the stratigraphical division of Jurassic,stratigraphical classification,se-quence of typical section,lithological characters and biota assemblage.In addition,the lithological facies and palaeogeogra-phy during the Early and Middle Jurassic.The stratigraphical region of Jurassic in Fujian can be divided into following subregion:The Central-Westsouth Fujiansubregion,which contain marine strata and the volcanic rock of Early Jurassic was development;North subregion of Fu-jian,which Jurassic strata belong to nonmarine;West subregion,there the Middle Jurassic strata was well developed. The biota of Bivalves,Plants,Conchostracans of Early Jurassic respectively belonging to Parainoceramus-Hu-nanonectes fauna(marine fossil),Otozamites-Thinnfeldia assemblage,Euestheria shandanensis-Palaeolimnadia hojiensisfauna,Gomphocytbere rhomboidalis-G.?yubacumensis assemblase and contain some Anmonoidea of Arietites,Coron-iceras in the marine bed.The biota of middle-late Early Jurassic belonging to Qiyangia fauna,Coniopteris-Phoenicopsis as-semblage,Eosolimnadiopsis-Asiolimnadiopsis fauna.The biota of Middle Jurassic,the feature of Plant assemblage is un-known,the Bivalves belonging to Pseudocardinia-Tutuella fauna,and at lower-middle part occur Cuneopsis-Psilunio-E-olumprotella fauna,Conchostraeans belonging to Euestheria yanjiawanensis-E.camplanata fauna,the DarwineUa saryti-manensis-D.magna fauna of Ostracode occur in lower-middle part.In addition,it has been discussed in this paper that the south part of Fujian was ocean and north was land during Ear-ly Jurassic.
出处
《福建地质》
1989年第3期198-216,T001,T002,共21页
Geology of Fujian
