GYIG OpenIR  > 矿床地球化学国家重点实验室
Dwindling vanadium in seawater during the early Cambrian, South China
Tao Han;  Haifeng Fan;  Hanjie Wen
Source PublicationChemical Geology

Elemental vanadium (V), an essentially redox-sensitive metal in seawater, has had a significant impact on the understanding of the evolution of the atmosphere-ocean system throughout the history of the Earth. In fact, the geochemical cycle of V in early Cambrian seawater may have had an influence on the Chengjiang Biota in South China; however, it has not yet been well established. Given the authigenic vanadium accumulation is sensitive to the redox conditions of seawater, here, to constrain the geochemical cycle of V in seawater during the early Cambrian, the Mo, U and total organic carbon (TOC) distributions with high-resolution samples from both the outer shelf and slope facies (e.g., the Duoding and Longbizui sections), are applied to evaluate the redox conditions of ambient seawater. The Mo-U relationships indicate that the redox conditions of the mid-depth seawater evolved in a systematic way in South China, transitioning from an Fe-Mn reduction zone to anoxic/intermittently euxinic states and then to oxic conditions during the early Cambrian. As a consequence, the authigenic V enrichment, constrained by the marine redox conditions, was mainly controlled by the Fe-Mn particulate shuttle and the reduction and adsorption of organic matter in anoxic/euxinic conditions. However, the decoupling among V, Mo, U and TOC under anoxic/euxinic conditions suggests a dwindling vanadium concentration in the early Cambrian seawater of South China. The scavenging efficiency of V from seawater is much higher than those of Mo and U under anoxic/euxinic conditions. Ultimately, these trace elements (e.g., Mo, U, and especially V) in seawater could effectively be regulated and adjusted to a reasonable level under the widespread anoxic/euxinic conditions. The drawdown of trace elements in seawater might provide an earlystage preparation of the marine environment for the subsequent Chengjiang Biota.

KeywordVanadium redox-sensitive Elements seawater Chemistry redox Conditions early Cambrian
Indexed BySCI
Document Type期刊论文
AffiliationState Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
Recommended Citation
GB/T 7714
Tao Han;Haifeng Fan;Hanjie Wen. Dwindling vanadium in seawater during the early Cambrian, South China[J]. Chemical Geology,2018,492:20-29.
APA Tao Han;Haifeng Fan;Hanjie Wen.(2018).Dwindling vanadium in seawater during the early Cambrian, South China.Chemical Geology,492,20-29.
MLA Tao Han;Haifeng Fan;Hanjie Wen."Dwindling vanadium in seawater during the early Cambrian, South China".Chemical Geology 492(2018):20-29.
Files in This Item:
File Name/Size DocType Version Access License
Dwindling vanadium i(2844KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tao Han;Haifeng Fan;Hanjie Wen]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tao Han;Haifeng Fan;Hanjie Wen]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tao Han;Haifeng Fan;Hanjie Wen]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Dwindling vanadium in seawater during the early Cambrian, South China.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.