气候变化领域集成服务门户(CCPortal): Heterogeneous seawater phosphorus concentrations during the Sturtian glaciation: Evidence from P/Fe ratios of Fulu Formation ironstone in South China

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DOI	10.1016/j.palaeo.2019.109409
	Heterogeneous seawater phosphorus concentrations during the Sturtian glaciation: Evidence from P/Fe ratios of Fulu Formation ironstone in South China
	Li F.; Lang X.; Ma H.; Cui Y.; Pei H.; Shen B.
发表日期	2020
ISSN	0031-0182
卷号	537
英文摘要	Phosphorus (P) is one of the key bio-limiting elements in the modern ocean, and controls marine primary productivity over the geological time scales. It is proposed that the Ediacaran atmosphere oxygenation and animal evolution might have been triggered by high seawater P concentration in Cryogenian oceans. Seawater P concentration can be reconstructed by the ratio of phosphorus to iron [expressed as (P/Fe)100] in ironstones. Here we measured the P/Fe ratios of the banded iron formation (BIF) from the Cryogenian Fulu Formation in South China. The (P/Fe)100 ratios of the Fulu BIF vary between 0.08 and 1.81 (mean = 0.45, n = 22), considerably lower than the values of coeval BIF deposited in other continents (mean = 1.24, n = 74). Variation of P/Fe ratio of ironstones may suggest a large seawater P concentration gradient during the Sturtian glaciation, which is comparable to, or even higher than, that in the modern ocean (~1.2 μM in North Atlantic and ~2.6 μM in North Pacific). Though being explained in different ways, the heterogeneous seawater P concentration requires active organic matter production in the surface ocean and/or decomposition in the ocean interior as well as possible onset of thermohaline circulation during the Sturtian glaciation. Finally, our study suggests that precipitation of BIF in the completely ice-covered ocean was unlikely. © 2019 Elsevier B.V.
英文关键词	Fulu Formation; Iron formation; Phosphorus cycle; Phosphorus/iron ratio; Yangtze Block
语种	英语
scopus关键词	banded iron formation; concentration (composition); decomposition; Ediacaran; geological time; glaciation; intertidal environment; iron; ironstone; phosphorus; phosphorus cycle; seawater; thermohaline circulation; Atlantic Ocean; Atlantic Ocean (North); China; Pacific Ocean; Pacific Ocean (North); Yangtze Platform; 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/150734
作者单位	Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, School of Earth and Space Sciences, Peking University, Beijing, 100871, China; Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, 610059, China; Institute of Mineral Resource, Chinese Academy of Geological Sciences, Beijing, 100037, China
推荐引用方式 GB/T 7714	Li F.,Lang X.,Ma H.,et al. Heterogeneous seawater phosphorus concentrations during the Sturtian glaciation: Evidence from P/Fe ratios of Fulu Formation ironstone in South China[J],2020,537.
APA	Li F.,Lang X.,Ma H.,Cui Y.,Pei H.,&Shen B..(2020).Heterogeneous seawater phosphorus concentrations during the Sturtian glaciation: Evidence from P/Fe ratios of Fulu Formation ironstone in South China.Palaeogeography, Palaeoclimatology, Palaeoecology,537.
MLA	Li F.,et al."Heterogeneous seawater phosphorus concentrations during the Sturtian glaciation: Evidence from P/Fe ratios of Fulu Formation ironstone in South China".Palaeogeography, Palaeoclimatology, Palaeoecology 537(2020).