Conodont Biostratigraphy and a Negative Excursion in Carbonate Carbon Isotopes across the Wuchiapingian-Changhsingian Boundary at the Dawoling Section,Hunan Province
Ye Qian
Jiang Haishui
Abstract：The research of conodont biostratigraphy and carbon isotope change at the Dawoling section provides basic materials for the exploration of creatures and environment change in the Wuchiapingian-Changhsigian period.The Dawoling section at Yuanjia Town,Jiahe county,Hunan Province,recorded basinal deposition during the Late Permian.The Talung Formation is well-exposed and displays siliceous rock,siliceous limestone,limestone and claystone.Three conodont taxa (one is undeter-mined)of genus Clarkina:C.wangi,C.deflecta and C.sp.are identified,and these enable the tentative assignment of a C. wangi Zone overlain by a C.changxingensis-C.deflecta assemblage Zone.The Wuchiapingian-Changhsingian boundary (Wuchiapingian-Changhsingian boundary,WCB)is placed at the first occurrence (FO)of C.wangi at the base of bed 11 at this Dawoling section.A rapid negative shift from 2.18‰ to -1.39‰ in carbonate carbon isotope in beds 13-15 correlates well with the Changhsingian GSSP(Global Stratotype Section and Point)section at Meishan in Zhejiang and the Shangsi section of Sichuan.Therefore,this negative excursion could be a regionally correlation horizon in south China.
Keywords：Wuchiapingian-Changhsingian boundaryconodontcarbon isotopeDawoling sectionstratigraphy.
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 1883-1892 )