中国科学D辑(英文版)
中國科學D輯(英文版)
중국과학D집(영문판)
SCIENCE IN CHINA(SCIENTIA SINICA)
2003年
11期
1182-1200
,共19页
童金南%Yuri D.Zakharov%Michael J.Orchard%殷鸿福%Hans J.Hansen
童金南%Yuri D.Zakharov%Michael J.Orchard%慇鴻福%Hans J.Hansen
동금남%Yuri D.Zakharov%Michael J.Orchard%은홍복%Hans J.Hansen
proposal%GSSP%Induan-Olenekian boundary%Lower Triassic%Chaohu of China
The Olenekian Stage of the Lower Triassic is named from the Boreal Realm, but the stage has never been properly defined, nor has it been applied in the low-latitude Tethyan Realm, with exception of North Caucasus and Mangyshlak. This paper proposes a stratotype for the Induan-Olenekian boundary in the low-latitude Tethyan Realm. South China is one of the main regions in the Tethyan Realm with well-developed Lower Triassic sequences and abundant fossils. According to the basic stratigraphic records and various accumulated data, we believe that the West Pingdingshan Section in Chaohu, Anhui Province is one of the best sequences to define the Induan-Olenekian boundary. The first appearance datum (FAD) of conodont Neospathodus waageni is the preferred index to define the boundary. This datum lies 26 cm below the FAD of the ammonoids Flemingites and Euflemingites, and is located slightly prior to the top of the second Triassic normal magnetozone, and the peak of the first Triassic positive excursion of carbon isotope δ13C.