摘要
在广西东攀二叠—三叠系界线剖面中发现了Domatacerasguangxiensis,LopingocerasguangdeensisZhao,LiangetZheng,Schizolobocerasfusuiensis,Agathicerassp.,Stacheocerassp.,PernodocerasrobustumChaoetLiang,Dushanocerascf.ro-tolariumZhao,LiangetZheng,Huananocerascf.perornatumChaoetLiang,Qianjiangocerassp.,Laibinocerascf.compressumYang,Glyptophicerassp.,Lytophicerascf.chamunda(Diener),OphicerastingiTien,Ophicerassp.化石。在剖面的第2~12-2层产Pernodoceras,Dushanoceras,Huananoceras和Qianjiangoceras化石,均为长兴期菊石带Pseudotirolites-Rotodiscoceras的共生化石。第12-3层产长兴期菊石Laibinocerascf.compressumYang。第13-1A^16层产Lytophiceras和Ophiceras,为早三叠世菊石带Ophiceras-Lytophiceras的带化石。东攀剖面菊石的分布及其与华南其他地区的对比研究表明,广西东攀剖面二叠—三叠系界线位于第12-3层(厚55cm)内部或者位于第13-1A层的底部。
In the Permian-Triassic intervals of Dongpan section, Guangxi, South China,an cephalopods is discovered including Lopingoceras guangdeensis Zhao, Liang et Zheng,Agathiceras sp. ,Stacheoceras sp. , Pernodoceras robusturn Chao et Liang, Dushanoceras cf. rotolariurn Zhao, Liang et Zheng, Huananoceras cf. perornaturn Chao et Liang, Qianjiangoceras sp. ,Laibinoceras cf. cornpressurn Yang,Lytophiceras cf. charnunda （Diener）, Ophiceras tingi Tien, and Ophiceras sp.. Among this fauna,ammonoids Pernodoceras,Dushanoceras, Huananoceras and Qianjiangoceras are discovered from bed 2 to bed 12-2, and regarded as the coexisting elements of the Changhsingian ammonoid Pseudotirolites-Rotodiscoceras zone, indicating Late Permian in age. While found ammonoid Laibinoceras cf. cornpressurn is discovered from bed 12-3, whose type species was found in the Changhsingian strata in Laibing, Guangxi. Ammonoids Lytophiceras and Ophiceras are discovered in bed 13-1A to bed 16, and regarded as the zonal fossils of the early Triasic ammonoid Ophiceras-Lytophiceras zone, indicating the Early Triassic in age. The Permian-Triassic boundary in Dongpan section is located in bed 12-3 or between bed 12-3 and bed 13-1A based on the date of ammonoid fauna and its correlation with the ammonoid faunas from other sections in South China.
出处
《地质科技情报》
CAS
CSCD
北大核心
2006年第4期47-51,共5页
Geological Science and Technology Information
基金
国家自然科学基金项目(40232025
40502001
40325004)
关键词
头足类动物群
二叠一三叠系界线
广西东攀剖面
Yunmengshan in Xin＇an County
ceramsite mudstone
deposit characteristics
development prospect
作者简介
卜建军（1972-），男，助理研究员，主要从事区域地质调查和地层古生物的研究工作。
