气候变化领域集成服务门户(CCPortal): Carbonate carbon isotope chemostratigraphy and U-Pb zircon geochronology of the Liuchapo Formation in South China: Constraints on the Ediacaran-Cambrian boundary in deep-water sequences

CCPortal

DOI	10.1016/j.palaeo.2019.109361
	Carbonate carbon isotope chemostratigraphy and U-Pb zircon geochronology of the Liuchapo Formation in South China: Constraints on the Ediacaran-Cambrian boundary in deep-water sequences
	Chen C.; Feng Q.
发表日期	2019
ISSN	0031-0182
卷号	535
英文摘要	The Ediacaran-Cambrian transition was one of the most significant intervals in geological history, witnessing the origin of the metazoans and major environmental changes. Establishing a precise chronostratigraphic framework for the Ediacaran-Cambrian transition has great significance for understanding the geological and evolutionary processes during this transition. An integrated study on carbonate carbon isotopes and U-Pb zircon dating was conducted within the Liuchapo Formation in the Sifangjing section in northeastern Guizhou Province, South China to recognize the Ediacaran-Cambrian boundary in slope facies of the Yangtze Block. A substantial negative carbonate carbon isotope excursion was recognized within the lower part of the Liuchapo Formation. Moreover, a weighted-mean U-Pb zircon age of 540.7 ± 3.8 (±6.6) Ma was obtained from a tuffaceous interlayer approximately 2 m above the interval of the negative carbon isotope excursion. The carbon isotope and age-dating results indicate that the Ediacaran-Cambrian boundary within the Sifangjing section should be placed in the lower part of the Liuchapo Formation. Additionally, in the Sifangjing section, a distribution of Horodyskia minor extends up to the basal Cambrian, while the last appearance datum (LAD) of Palaeopascichnus jiumenensis correlates to the large negative carbon isotope excursion within the Liuchapo Formation. This relationship indicates that the LAD of the Palaeopascichnus jiumenensis is a potential tool for the stratigraphic correlation of the Ediacaran-Cambrian boundary successions in slope and deep-water basin settings of the Yangtze Block. © 2019 Elsevier B.V.
英文关键词	Dengying Formation; Sifangjing section; Slope facies; Tuffaceous interlayer; Yangtze Block
语种	英语
scopus关键词	Cambrian; carbon isotope; carbonate system; chemostratigraphy; chronostratigraphy; Ediacaran; environmental change; facies; geochronology; geological record; metazoan; slope; tuff; uranium-lead dating; zircon; China; Guizhou; Yangtze Platform; Metazoa
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150771
作者单位	State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China; School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Chen C.,Feng Q.. Carbonate carbon isotope chemostratigraphy and U-Pb zircon geochronology of the Liuchapo Formation in South China: Constraints on the Ediacaran-Cambrian boundary in deep-water sequences[J],2019,535.
APA	Chen C.,&Feng Q..(2019).Carbonate carbon isotope chemostratigraphy and U-Pb zircon geochronology of the Liuchapo Formation in South China: Constraints on the Ediacaran-Cambrian boundary in deep-water sequences.Palaeogeography, Palaeoclimatology, Palaeoecology,535.
MLA	Chen C.,et al."Carbonate carbon isotope chemostratigraphy and U-Pb zircon geochronology of the Liuchapo Formation in South China: Constraints on the Ediacaran-Cambrian boundary in deep-water sequences".Palaeogeography, Palaeoclimatology, Palaeoecology 535(2019).