江西信丰铁石口剖面晚二叠世的牙形石动物群  

Conodont Fauna of Late Upper Permian in Xinfeng Area,Jiangxi Province

作　　者：武桂春[1] 姚建新[2] 纪占胜[2] 

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中国地质科学院地质所,北京100037

出　　处：《北京大学学报（自然科学版）》2003年第2期211-218,共8页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金资助项目 ( 495 72 0 88;49972 0 14)

摘　　要：对江西省信丰县铁石口剖面晚二叠世长兴阶至铁石口阶下部的牙形石动物群有了新的认识。基于牙形石的研究 ,将该地区晚二叠世的地层划分为 3个牙形石生物带 ,自上而下分别是 :Clarkinachangxingensisyini带 ;Clarkinapostwangi带 ;Clarkinachangxingensis带。探讨了浙江长兴煤山标准剖面晚二叠世长兴组至殷坑组下部的牙形石生物带的划分 ,将这段地层划分为 4个牙形石带 ,自上而下分别是 :Clarkinameishanensismeishanensis带 ;Clarkinachangxingensisyini Clarkinameis hanensiszhangi带 ;Clarkinapostwangi和Clarkinasubcarinata Clarkinachangxingensis组合带 ,而最下部的一个带又分为 2个亚带 ,即上部的Clarkinachangxingensis亚带和下部的Clarkinasubcarinata Clarkinawangi亚带。最后将铁石口剖面与煤山剖面进行了牙形石生物地层对比 ,认为铁石口剖面除了长兴组下部被第四纪河床覆盖之外 ,晚二叠世上部的地层可以完全与煤山剖面进行对比。A detailed research has been worked on the Late Upper Permian conodont fauna of Tieshikou section in Xinfeng area,Jiangxi Province.Based on the previous study and new materials,three conodont zones were described.In descending order,they were Clarkina changxingensis yini zone, Clarkina postwangi zone and Clarkina changxingensis zone.In addition,the authors also discussed the conodont zonal division of Late Upper Permian strata in Meishan section,Changxing County,Zhejiang Province.Different from the former study,four zones and two subzones were proposed.Finally,a precise correlation between Tieshikou section and Meishan section,the GSSP of Permian-Triassic boundary was done.

关 键 词：晚二叠世 牙形石动物群 铁石口剖面 地层对比 

分 类 号：Q915[天文地球—古生物学与地层学]