新疆柯坪地区志留系柯坪塔格组的遗迹化石  

Trace Fossils in the Silurian Kepingtage Formation in the Kalpin Area,Xijiang

作　　者：白忠凯[1] 胡斌[2] 齐永安[2] 张国成[2] 

机构地区：[1]中国石油大学盆地与油藏研究中心,北京102249 [2]河南理工大学资源环境学院,河南焦作454000

出　　处：《地质学报》2008年第9期1161-1168,I0001,I0002,共10页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号40372013;40572012);国家重大基础研究前期研究专项(编号2005CCA05000)资助的成果

摘　　要：通过对柯坪地区剖面志留系的研究,在柯坪塔格组中已识别出遗迹化石15属20种,它们是:Asterichnus lawrencensis,Cochlichnus anguineus,Cruziana ichnosp.,Cruziana qinlingensis,Cruziana rouaulti,Diplichnites bipartibilis,Gordia molassica,Helminthopsis abeli,Helminthopsis isp.,Lockeia siliquaria,Monocraterion cf.teataculatum,Palaeophycus tubularis,Planolites isp.,Planolites montanus,Planolites punctatus,Rusophycus ramellensis,?Scolicia ichnosp.,Sagittichnus lincki,Spirophycus bicornis,Taenidium cameronensis。根据这些遗迹化石的组成、产状、分布规律及其围岩的沉积特征,可以划分为两种不同沉积环境条件下的遗迹组合,即①Hel minthopsis-Gordia遗迹组合,主要组成分子有Asterichnus,Diplichnites,Gorida,Hel minthopsis,Planolites,Rusophycus,?Scolicia和Spirophycus等,被解释形成于低能的滨外远岸浅海陆棚环境;②Cruziana-Rusophycus遗迹组合,常见组成分子有Cochlichnus,Cruziana,Lockeia,Palaeophycus,Rusophycus,Monocraterion,Sagittichnus,和Taenidium等,解释它们形成于滨外近岸浅海陆棚环境。Based on the study of Silurian outcrop at the Kalpin area in the northwest of Tarim Basin, Xinjiang, 15 ichnogenus and 28 ichnospecies, namely, Asterichnus lazorencensis, Cochlichnus anguineus, Cruziana ichnosp. , Cruziana qinlingensis, Cruziana rouaulti, Diplichnites bipartibilis, Gordia molassica, Helminthopsis abeli , Helminthopsis isp. , Lockeia siliquaria , Monocraterion of. teataculatum, Palaeophycus tubularis, Planolites isp. , Planolites montanus, Planolites punctatus, Rusophycus ramellensis , ？ Scolicia ichnosp. , Sagittichnus lincki , Spiroph ycus bicornis and Taenidium cameronensis, have been discovered the Kalpintage Formation. According to the composition, occurrence and distribution characteristics of these trace fossils and their country rock features, two types of ichnoassemblages under different sedimentary environments have been recognized as follows： （1） Helminthopsis-Gordia ichnoassemblage, including such common trace fossils as Asterichnus, Diplichnites, Gorida, Helminthopsis, Planolites, Rusophycus,？ Scolicia and Spirophycus, generated in deep water shelf sedimentary environment far away the shore with lower energy; and （2） CruzianaRusophycus ichnoassemblage, containing such trace fossils as Cochlichnus, Cruziana, Palaeophycus, Lockeia, Rusophycus, Monocraterion, Sagittichnus and Taenidium, formed in a shallow water shelf sedimentary environment.

关 键 词：新疆 柯坪地区 志留系 柯坪塔格组 遗迹化石 

分 类 号：Q915[天文地球—古生物学与地层学]