甘肃靖远、景泰早石炭世维宪期植物群  

A VISEAN FLORA (CHOUNIUKOU FORMATION) FROM JINGYUAN AND JINGTAI IN GANSU, NORTHWESTERN CHINA

作　　者：吴秀元 [1] 王军 [1] 张宜 [1] I.M.STEVANOVIC-WALLS  H.W.PFEFFERKORN  

机构地区：[1]中国科学院南京地质古生物研究所,南京,210008 [2]Department of Earth and Environmental Science, University of Pennsylvanian, Philadelphia, PA 19104-6316,USA

出　　处：《古生物学报》2005年第2期175-202,共28页Acta Palaeontologica Sinica

基　　金：中国科学院知识创新工程重要方向项目(KZECX 2 SW 130);国家自然科学基金(No.40102002;40321202)资助课题

摘　　要：祁连山和河西走廊区石炭纪地层发育,动植物化石丰富,是研究我国海陆交互相石炭系的重要地区。臭牛沟组系袁复礼(1925)所建,标准地点在甘肃武威西南35 km的臭牛沟,据其中的腕足类和珊瑚化石的研究,确定其时代为早石炭世维宪期(Visean)。研究材料来自甘肃景泰和靖远的早石炭世臭牛沟组,这里的臭牛沟组厚约120 m左右,由泥质页岩夹煤线、粉砂岩及薄层泥灰岩、灰岩组成,为潮间潟湖相至滨海沼泽相及泥炭沼泽相沉积。含丰富的植物化石,主要分子有:Sublepidodendron sp., Lepidodendron ciyaoense sp. nov., Lep jingyuanense sp.nov., Lepidodendron volkmannianum, Lep. gansuense sp. nov., Lep. shanyangense, Lep. cf. aolungpulukense,Lep. sp.1, Lep. sp.2, Cathaysiodendron jingyuanense, C. cf. incertum, Stigmaria ficoides, Lepidostrobophyl lum cf. lanceolatum, L. rotundifoliumsp. nov., Lepidostrobussp. 1, L. sp.2, Bothrodendron ruchengense, Ar chaeocalamites scrobiculatus, Hamatophyton verticillatum, Cardiopteridium spetsbergense, C. podozamioides,Triphyllopteris collombiana , Triphyllopteris sp. ( cf. T. lescuriana Lesquereux), Rhacopteris sp.,In China, the terrestrial-marine inter-deposited Carboniferous are best developed in Qilian Mountain and Hexi Corridor, where both fauna and plant fossils are well preserved and can be compared to that of Europe and North America. Here a Visean flora is reported. The plant bearing Chouniukou Formation is 120m thick, consists of muddy shale, coal seams, clay, silty sandstone and marl, representing deposits of inter-tide lagoon, coastal swamp and peat swamp. The fossil plants include: Sublepidodendron sp., Lepidodendron gansuense sp. nov., Lepidodendron volkmannianum, Lep. jingyuanense sp. nov., Lep. ciyaoense sp. nov., Lep. shanyangense, Lep. cf. shanyangense, Lep. cf. aolungpulukense, Lep. sp.1, Lep. sp.2, Cathaysiodendron jingyuanense, C. cf. incertum, Lepidostrobophyllum rotundifolium sp. nov., Bothrodendron ruchengense, Archaeocalamites scrobiculatus, Hamatophyton verticillatum, Cardiopteridium spetsbergense, C. podozamioides, Triphyllopteris collombiana ,Triphyllopteris sp. Rhacopteris sp., Adiantites gothanii, Rhodeopteridium hsianghsiangense, R.cf. hsianghsiangense, R. cf. chinghaiense, Paripteris gigantea, P. cardiopteroides, Linopteris sp. This flora presents a phase of the vegetation right prior to the Namurian global glaciation from the tropical island. Features of the flora, such as the botanical significance, phytogeography, and the age determination and a comparison with other known Visean floras are detailed.

关 键 词：早石炭世 植物群 景泰 臭牛沟组 sp. 植物化石 下石炭统 海陆交互相 地层发育 河西走廊 甘肃武威 珊瑚化石 泥质页岩 泥炭沼泽 下伏地层 孢子化石 上覆地层 牙形石带 贵州罗甸 腕足类 孢子带 石炭纪 祁连山 石炭系 泥灰岩 

分 类 号：Q914.2[天文地球—古生物学与地层学]