新疆西北部早古生代地层

Early Palaeozoic Strata from Northwest Xinjiang

根据新疆西北部伊宁果子沟、艾比湖及和布克赛尔等地的早古生代地层剖面，对这一地区寒武系、奥陶系和志留系的岩石地层单元和生物带作了修订，特别是重新修订了奥陶系的新二台组和风沟组，并建议取消塔勒基河组。对下古生界各系的生物带作了较大的修订，并基于此对各纪地层作了划分和对比。根据地层的发育特征和各门类生物地理分布，认为新疆西北部在早古生代属于哈萨克斯坦古板块的东延部分。

Early Palaeozoic strata from Northwest Xinjiang distribute mainly from the Yining basin,Abi lake and Hoboksar.The strata redefined by the authors in the present paper are reported in descending order as follows: Silurian Pridoli Utublake Formation (Hoboksar) Monograptus bouceki Zone (Ni et al. ) Ludlow Kekexiongkuduke Formation (Hoboksar) Bohemograptus bohemicus Zone Wenlock Shaerbuer Formation Atrypa Eospirifer Assemblage Llandovery Bulong Formation (Hoboksar) Monograptus nodifer Zone Oktavites communis Spirograptus turriculatus Zone Ordovician Late Ordovician Bulongguoer Formation (Hoboksar) or Hudukedaban Formation (Yining) Agetolites Plasmoporella Assemblage Ashitake Formation (Yining) Huochengia Leptellina Assemblage Kekesaleixi Formation (Yining) Dicranograptus clingani Zone Nemagraptus Zone Middle Ordovician Fenggou Formation (Yining) Glyptograptus teretiusculus Zone Glossograptus ex gr. acanthus Xinertai Formation (Yining) Oncograptus upsilon Zone Isograptus victoriae maximus Zone Pendeograptus fruticosus Zone Tetragraptus approximatus Zone Clonograptus Adelograptus Zone Guozigou Formation (Upper) (Yining) Hysterolenus Zone Cambrian Late Cambrian Guozigou Formation (Lower) (Yining) Lotagnostus spectabilis Bulbolenus Zone Lotagnostus punctatus Zone Agnostotes tianshanicus Zone Jianjungou Formaiton (Yining) Glyptagnostus reticulatus Zone Glyptagnostus stolidotus Zone Agnostascus orientalis Zone Middle Cambrian Aheqiate Formation (Yining) Lejopyge laevigata Zone Kensayi Formation (Yining) Goniagnostus nathorsti Ptychagnostus punctuosus Zone Xystridura Zone Lower Cambrian Huocheng Formation (Yining) Calodiscus Kootenia Zone Linkuanggou Formation (Yining) protolenid The Kazakhstan Palaeoplate consists of many small immediate massives including the Yining and Junggar Blocks.Both of the biogeographic and tectonic evidences of these two massives have been discussed in the present study.