气候变化领域集成服务门户(CCPortal): The Paleoecological Environment during the Ediacaran-Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes

CCPortal

DOI	10.3390/min14030224
	The Paleoecological Environment during the Ediacaran-Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes
	Gao, Lei; Yang, Ruidong; Gao, Junbo; Luo, Chaokun; Liu, Linlin; Ni, Xinran; Li, Xinzheng; Mo, Hongcheng; Peng, Rou
发表日期	2024
EISSN	2075-163X
起始页码	14
结束页码	3
卷号	14 期号:3
英文摘要	During the Ediacaran-Cambrian transition, a series of stratal continuous and well-preserved siliceous rock and phosphorite assemblages developed in Qingzhen, Guizhou Province, China, facilitating research on the biological evolution, marine chemistry, and palaeoecological environment of this period. Therefore, we investigated the paleontology, trace and rare earth elements, total organic carbon, total sulfur content, and Zn isotopes of the phosphorus-bearing rock series in the Taozichong Formation of the Cambrian period in Qingzhen. Geochemical analysis reveals that the sedimentary rocks in this area were formed in the oxygen-rich seawater environment and were not affected by high-temperature hydrothermal activity. The upwelling ocean current provided abundant rare earth elements and other nutrient elements, as well as conditions for the prosperity of biota in Qingzhen. In addition, the delta 66Zn value (-0.21 parts per thousand-0.41 parts per thousand range and 0.17 parts per thousand mean) in the Qingzhen phosphorous rock series was much lower than that in seawater, indicating a strong level of biological productivity. The variation trend of delta 13C, delta 18O, and delta 66Zn exhibited four stages and three obvious drift events. The results suggest that climate change during this period led to the intermittent flourishing and extinction of organisms, which triggered the negative drift of delta 13C and delta 18O in the ocean, resulting in a coordinated response of delta 66Zn. The unique ecological environment of the Taozichong Formation in Qingzhen also provides favorable conditions for the population continuation of Ediacaran-type benthic soft-bodied metazoon dominated by discoid fossils, Shaanxilithes, worm fossils, and sponge fossils in the Cambrian strata, as well as participation in the global biological explosion events. The study area provides new insights for rebuilding the global Ediacaran-Cambrian ecosystem during the transition period.
英文关键词	Zn isotope; geochemistry; paleoecological environment; phosphorous rock series; Cambrian
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:001193042700001
来源期刊	MINERALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301830
作者单位	Guizhou University; Guizhou University
推荐引用方式 GB/T 7714	Gao, Lei,Yang, Ruidong,Gao, Junbo,et al. The Paleoecological Environment during the Ediacaran-Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes[J],2024,14(3).
APA	Gao, Lei.,Yang, Ruidong.,Gao, Junbo.,Luo, Chaokun.,Liu, Linlin.,...&Peng, Rou.(2024).The Paleoecological Environment during the Ediacaran-Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes.MINERALS,14(3).
MLA	Gao, Lei,et al."The Paleoecological Environment during the Ediacaran-Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes".MINERALS 14.3(2024).