气候变化领域集成服务门户(CCPortal): Redox conditions and manganese metallogenesis in the Cryogenian Nanhua Basin: Insight from the basal Datangpo Formation of South China

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DOI	10.1016/j.palaeo.2019.05.031
	Redox conditions and manganese metallogenesis in the Cryogenian Nanhua Basin: Insight from the basal Datangpo Formation of South China
	Ma Z.; Liu X.; Yu W.; Du Y.; Du Q.
发表日期	2019
ISSN	0031-0182
起始页码	39
结束页码	52
卷号	529
英文摘要	In South China, the Datangpo Formation was deposited during the Cryogenian interglacial stage between the Sturtian and Marinoan glaciations. The variations in paleoocean chemistry recorded in the Datangpo Formation are important to understand the formation of Mn ore as well as the early evolution of animals, which are not well constrained. Based on lithological observation and multi-geochemical proxies (iron speciation, Mo, U, V, Mn, Al and pyrite sulfur isotope)from drill core ZK43-6 from southeastern Chongqing, South China, the results indicate an anoxic (mostly euxinic)water condition for the lower black shales of the Datangpo Formation, which can be further divided into four intervals (I, II, III, IV). Among of them, very high Mn content and manganese metallogenesis is related to the suboxic Interval II between two euxinic depositions (Interval I and Interval III). Thus, our new findings suggest that the general euxinic condition at the basal Datangpo Formation is interrupted by a suboxic deposition (Interval II)where the manganese deposits formed. An updated model is proposed to shed light on the evolution in redox conditions of the Datangpo Formation as a function of sea-level and terrigenous input, and the genesis of “Datangpo-type” manganese in light of the temporal seawater redox conditions and microbial activity. © 2019 Elsevier B.V.
英文关键词	Microbial activity; Paleoocean chemistry; Post-Sturtian; Sea level; Sulfur isotope
语种	英语
scopus关键词	glacial-interglacial cycle; glaciation; manganese; metallogenesis; microbial activity; paleoceanography; redox conditions; sea level; suboxic conditions; sulfur isotope; China; Chongqing; Animalia
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/150913
作者单位	Chengdu Center, China Geological Survey, Chengdu, 610081, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; Key Laboratory of Submarine Geosciences and Prospecting Technology, College of Marine Geosciences, Ocean University of China, Qingdao, 266100, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences-Wuhan, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Ma Z.,Liu X.,Yu W.,et al. Redox conditions and manganese metallogenesis in the Cryogenian Nanhua Basin: Insight from the basal Datangpo Formation of South China[J],2019,529.
APA	Ma Z.,Liu X.,Yu W.,Du Y.,&Du Q..(2019).Redox conditions and manganese metallogenesis in the Cryogenian Nanhua Basin: Insight from the basal Datangpo Formation of South China.Palaeogeography, Palaeoclimatology, Palaeoecology,529.
MLA	Ma Z.,et al."Redox conditions and manganese metallogenesis in the Cryogenian Nanhua Basin: Insight from the basal Datangpo Formation of South China".Palaeogeography, Palaeoclimatology, Palaeoecology 529(2019).