Evolution of carbon isotope composition in potential global stratotype section and point at Luoyixi, South China, for the base of the unnamed global seventh stage of Cambrian System
Zuo Jingxun1,2; Peng Shanchi (彭善池)1; Zhu Xuejian (朱学剑)1; Qi Yuping ()祁玉平1; Lin Huanling (林焕令)1; Yang Xianfeng (杨显峰)1
2008-02-01
发表期刊JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES
ISSN1002-0705
卷号19期号:1页码:9-22
摘要

This work deals with the evolution of carbon isotope composition in the Luoyixi Section, a candidate of the Global Standard Stratotype-section and Point (GSSP), defining the base of the as-yet-undefined seventh stage of Cambrian System fit the first appearance of the cosmopolitan agnostoid Lejopyge laevigata. This level is favored in a vote of International Subcommission on Cambrian Stratigraphy (ISCS) as the bioborizon for defining the base of a global stage. Two hundred and sixty-four samples for carbon and oxygen isotope analysis have been collected from the carbonate successions at an interval of 0.25 to 0.5 m in this section. Results of the carbon isotope data exhibit a remarkable disciplinarian trend. The pattern of the carbon isotope evolution is gently undulant with a relatively long period during the underlying Drumian Stage, and then the values of delta C-13 fluctuate sharply with a short period in provisional seventh stage. The onset of sharp fluctuation in the delta C-13 values begins at the proposed GSSP level, defining the base of the global seventh stage, where delta C-13 values change from a gentle trend to a sharp trend. Distinct covariant-relationships among delta C-13, delta O-18, and sea level fluctuations suggest that a warming change in paleoclimate took place during the early global seventh stage, which led to a positive shift in delta C-13 values.

关键词Carbon Isotope Composition Global Seventh Stage Of Cambrian System Luoyixi Section Northwestern Hunan
语种英语
关键词[WOS]Mass Extinctions ; Sea-level ; Boundary ; Stratigraphy ; Seawater ; Record ; Event ; Chronostratigraphy ; Perturbation ; Dissociation
WOS研究方向Geology
WOS类目Geology ; Geosciences, Multidisciplinary
WOS记录号WOS:000253958200002
出版者CHINA UNIV GEOSCIENCES
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/149
专题中国科学院南京地质古生物研究所
其他
通讯作者Zuo Jingxun
作者单位1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeontol & Stratig, Nanjing 210008, Peoples R China
2.Henan Inst Geol Survey, Ufa 450001, Russia
推荐引用方式
GB/T 7714
Zuo Jingxun,Peng Shanchi ,Zhu Xuejian ,et al. Evolution of carbon isotope composition in potential global stratotype section and point at Luoyixi, South China, for the base of the unnamed global seventh stage of Cambrian System[J]. JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES,2008,19(1):9-22.
APA Zuo Jingxun,Peng Shanchi ,Zhu Xuejian ,Qi Yuping ,Lin Huanling ,&Yang Xianfeng .(2008).Evolution of carbon isotope composition in potential global stratotype section and point at Luoyixi, South China, for the base of the unnamed global seventh stage of Cambrian System.JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES,19(1),9-22.
MLA Zuo Jingxun,et al."Evolution of carbon isotope composition in potential global stratotype section and point at Luoyixi, South China, for the base of the unnamed global seventh stage of Cambrian System".JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES 19.1(2008):9-22.
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