Vanadium isotope evidence for widespread marine oxygenation from the late Ediacaran to early Cambrian

Wei, Wei; Chen, Xi; Wu, Fei; Dong, Linhui; Pan, Songqi; Jing, Zhenhua; Huang, Fang

doi:10.1016/j.epsl.2022.117942

Cited by 12 publications

(6 citation statements)

References 69 publications

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“…36 In recent years, with the development of metal stable isotope analysis technology, based on C, S isotopes, stable isotopes such as U, Mo and Fe have been gradually applied to paleomarine environment research, becoming effective indicators for tracing the redox state of marine water. 7,13,52,53 Many studies based on various geochemical indicators such as inorganic 38 and the oxidation−reduction sensitive element content in the upper phosphate layer (Mo = 0.23−1.35 μg/g, U = 3.79−7.05 μg/g, V = 13.9−24.5 μg/g) is obviously lower than that in the lower layer (Mo = 1.52−14.00 μg/g, U = 5.53−22.10 μg/g, V = 9.7−52.7 μg/g), 61 the Ce anom = −0.26∼−0.29 in upper phosphate layer, and Ce anom = −0.065∼−0.077 in lower layer. In addition, Fe-redox pumping is also key for phosphorus enrichment.…”

Section: Paleo-marine Environment Of the Ediacaran-early Cambrian In ...mentioning

confidence: 99%

“…In recent years, with the development of metal stable isotope analysis technology, based on C, S isotopes, stable isotopes such as U, Mo and Fe have been gradually applied to paleo-marine environment research, becoming effective indicators for tracing the redox state of marine water. ,,, Many studies based on various geochemical indicators such as inorganic carbon isotope, molybdenum isotope and sulfur isotope show that there is a highly stratified redox structure in the Ediacaran to Early Cambrian oceans in the Yangtze region of South China. − At the Doushantuo Formation, Dengying Formation and Niutitang Formation in Ediacaran to Early Cambrian in South China, synthesizing many discrimination indexes of trace elements and rare earth elements, the average V/(V + Ni) value is 0.70, 0.79, and 0.86 respectively, and the average δU value is 1.83, 1.92, and 1.87, respectively (Table ); δCe always shows negative anomaly (δCe value is 2.70, 1.74, and 1.57 respectively, Table ), and the negative anomaly trend gradually weakens with time. It is considered that the Ediacaran to Early Cambrian phosphorus mineralization period in South China is generally a reducing environment, but with the end of the ice age, climate warming promotes the enhancement of continental chemical weathering and promotes the increase of oxygen content, and there are local oxidation events.…”

Section: Paleo-marine Environment Of the Ediacaran-early Cambrian In ...mentioning

confidence: 99%

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Geochemical Characteristics of Trace Elements and Mineralization Model of the Ediacaran-Early Cambrian Phosphorites, South China

Zhang,

Zhu

2024

ACS Omega

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As a nonrenewable resource, phosphate rock is an important support for the development and survival of the national economy. The regional distribution and output of phosphate rock in China are extremely uneven, and the amount of high-quality ore resources is relatively poor, which seriously restricts the development and utilization of phosphate rock resources in China. This paper briefly summarizes the distribution characteristics of phosphate rock resources and summarizes the characteristics and research progress of Ediacaran-early Cambrian phosphorus mineralization types, geological characteristics, and deposit genesis of the Yangtze platform in South China. The Ediacaran-early Cambrian sedimentary phosphorite deposits in China are mainly distributed in Yunnan, Guizhou, Hubei, Sichuan and Hunan provinces of the Yangtze platform, in which the early Cambrian phosphate deposits are also rich in rare earth elements, associated with uranium, nickel, molybdenum, vanadium, and other beneficial metal elements. The increase of atmospheric oxygen content at the Ediacaran-Cambrian boundary may have promoted the extensive oxygenation of the late Neoproterozoic oceans, so the Ediacaran-early Cambrian oceans generally showed a reductive environment, and there may be dynamic chemical stratification of the oxidation zone-sulfide zone-iron zone. Up to the early Cambrian, the redox stratified structure of Precambrian seawater may still be inherited, showing that the surface water is an oxidizing environment, changing to a reduction environment, and even wedge-shaped sulfide water is developed at the bottom of the deep basin. The main phosphorus sources are deep phosphorus-rich seawater, continental weathering, and deep hydrothermal activity of Ediacaran-early Cambrian marine sedimentary phosphorite deposits in South China. The genetic mechanisms of phosphorite deposits in the Yangtze platform in South China are mainly biogenic, upwelling phosphorus-forming theory, mechanical mineralization, and syn-sedimentary hot water mixed genesis. In the future, it is still necessary to further explore the internal relationship between phosphorus deposits and major geological events, the in situ analysis of microstructure of phosphate rock ores, and the genetic mechanism of phosphate deposits and the reconstruction of paleo-marine environment.

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Section: Paleo-marine Environment Of the Ediacaran-early Cambrian In ...mentioning

confidence: 99%

Section: Paleo-marine Environment Of the Ediacaran-early Cambrian In ...mentioning

confidence: 99%

Geochemical Characteristics of Trace Elements and Mineralization Model of the Ediacaran-Early Cambrian Phosphorites, South China

Zhang,

Zhu

2024

ACS Omega

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“…A potential stratigraphic correlation between the BACE and Laurentian volcanic outgassing (Hodgin et al, 2021) is interesting and requires further study, especially given the tight coupling of Phanerozoic volcanism, anoxia, and mass extinctions (Bond & Grasby, 2017) and possible isotopic evidence of widespread marine anoxia in terminal Ediacaran oceans [e.g. Tostevin et al, 2019;Li et al, 2020a; but see Wei et al (2023) for contrasting indicators of widespread oxygenation]. Nonetheless, the proposed causal links between anoxia and Ediacaran extinctions are at odds with persistent, widespread oceanic euxinia throughout the diversification of the Ediacaran Biota (e.g.…”

Section: Questioning Abiotic 'Catastrophes'mentioning

confidence: 99%

“…Tostevin et al ., 2019; Li et al ., 2020 a ; but see Wei et al . (2023) for contrasting indicators of widespread oxygenation]. Nonetheless, the proposed causal links between anoxia and Ediacaran extinctions are at odds with persistent, widespread oceanic euxinia throughout the diversification of the Ediacaran Biota (e.g.…”

Section: Questioning Abiotic ‘Catastrophes’mentioning

confidence: 99%

Decline and fall of the Ediacarans: late‐Neoproterozoic extinctions and the rise of the modern biosphere

Mussini,

Dunn

2023

Biological Reviews

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The end‐Neoproterozoic transition marked a gradual but permanent shift between distinct configurations of Earth's biosphere. This interval witnessed the demise of the enigmatic Ediacaran Biota, ushering in the structured trophic webs and disparate animal body plans of Phanerozoic ecosystems. However, little consensus exists on the reality, drivers, and macroevolutionary implications of end‐Neoproterozoic extinctions. Here we evaluate potential drivers of late‐Neoproterozoic turnover by addressing recent findings on Ediacaran geochronology, the persistence of classical Ediacaran macrobionts into the Cambrian, and the existence of Ediacaran crown‐group eumetazoans. Despite renewed interest in the possibility of Phanerozoic‐style ‘mass extinctions’ in the latest Neoproterozoic, our synthesis of the available evidence does not support extinction models based on episodic geochemical triggers, nor does it validate simple ecological interpretations centred on direct competitive displacement. Instead, we argue that the protracted and indirect effects of early bilaterian innovations, including escalations in sediment engineering, predation, and the largely understudied impacts of reef‐building, may best account for the temporal structure and possible selectivity of late‐Neoproterozoic extinctions. We integrate these processes into a generalised model of early eumetazoan‐dominated ecologies, charting the disruption of spatial and temporal isotropy on the Ediacaran benthos as a consequence of diversifying macrofaunal interactions. Given the nature of resource distribution in Ediacaran ecologies, the continuities among Ediacaran and Cambrian faunas, and the convergent origins of ecologically disruptive innovations among bilaterians we suggest that the rise of Phanerozoic‐type biotas may have been unstoppable.

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“…21,[37][38][39] The strong correlation between d 51 V in marine authigenic sediments and the overlying redox conditions suggests that vanadium isotopes in sediments have the potential to trace variations in the marine palaeo-redox state, particularly to trace subtle redox variations in local oxygen-decient to low oxygen environments. [40][41][42][43][44] Moreover, the variations in V isotopes in terrestrial materials could be used to trace the sources of vanadium in crude oils, soils, lake sediments and aquatic food chains. 15,18,19,45 Despite the promising application of V isotopes, the dataset and investigation of V isotopes are still limited due to the complicated and inefficient chemical purication procedure of V isotopes.…”

Section: Introductionmentioning

confidence: 99%

Rapid determination of V isotopes with MC-ICP-MS: new developments in sample purification

Zeng,

2024

J. Anal. At. Spectrom.

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Vanadium isotope evidence for widespread marine oxygenation from the late Ediacaran to early Cambrian

Cited by 12 publications

References 69 publications

Geochemical Characteristics of Trace Elements and Mineralization Model of the Ediacaran-Early Cambrian Phosphorites, South China

Geochemical Characteristics of Trace Elements and Mineralization Model of the Ediacaran-Early Cambrian Phosphorites, South China

Decline and fall of the Ediacarans: late‐Neoproterozoic extinctions and the rise of the modern biosphere

Rapid determination of V isotopes with MC-ICP-MS: new developments in sample purification

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