GYIG OpenIR  > 矿床地球化学国家重点实验室
A predominantly ferruginous condition in the Ediacaran deep ocean: Geochemistry of black shales in the Ediacaran Doushantuo Formation, South China
Jing Huang;  Lianjun Feng;  Xuelei Chu;  Tao Sun;   Hanjie Wen;  Liping Qin;  Yanan Shen
2017
Source PublicationPrecambrian Research
Volume295Pages:12-23
Abstract

The redox condition of the ocean played an important role in the evolution of the Ediacaranbiota, but it remains largely unexplored, particularly for the deep ocean environment. In this study, we present a comprehensive study of Fe speciation and trace elements of the Doushantuo black shales from the Longe and Jinjiadong sections in South China, to investigate the redox condition of basinal environments in Ediacaran. In general, both sections show high FeHR/FeT ratios (>0.38), low FePy/FeHR ratios (<0.7), suggesting a predominately anoxic and ferruginous condition in the deep water of Nanhua basin during the Doushantuo period. A few high FePy/FeHR ratios (>0.7) in the Jinjiadong section indicating occasional euxinia in the basin facies. FePy/FeHR ratios show an increase in the middle part both in the Longe and Jinjiadong sections, indicating enhanced production of H2S via bacteria sulfate reduction (BSR) in the deep anoxic water, which was likely responsible to the upper Doushantuo negative carbon isotope excursion.

The enrichment factors (EFs) of most redox sensitive trace elements in the sediments of both sections are low (≤1), while EF-Mo shows moderately enriched (∼3–60), which is similar to the modern Cariaco Basin. Because of paleogeographic restriction or persistent ocean stratification, the trace elements renewal would be mostly obstructed in the isolated deep water, and their inventory could become depleted, which cause the low EFs of most trace elements in sediments. However, for the non-euxinic deep ocean, a “particulate shuttle” would transport Mo from shallow water to deep water through adsorption-desorption on the Mn–Fe-oxyhydroxides, which maintained moderate Mo enrichment in seawater and related sediments.

KeywordEdiacaran Deep Water Fe Speciation Trace Element South China
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8403
Collection矿床地球化学国家重点实验室
Affiliation1.CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
2.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
3.Key Laboratory for Mineral Resources, Chinese Academy of Sciences, Beijing 100029, China
4.Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77062, USA
5.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Recommended Citation
GB/T 7714
Jing Huang;Lianjun Feng;Xuelei Chu;Tao Sun; Hanjie Wen;Liping Qin;Yanan Shen. A predominantly ferruginous condition in the Ediacaran deep ocean: Geochemistry of black shales in the Ediacaran Doushantuo Formation, South China[J]. Precambrian Research,2017,295:12-23.
APA Jing Huang;Lianjun Feng;Xuelei Chu;Tao Sun; Hanjie Wen;Liping Qin;Yanan Shen.(2017).A predominantly ferruginous condition in the Ediacaran deep ocean: Geochemistry of black shales in the Ediacaran Doushantuo Formation, South China.Precambrian Research,295,12-23.
MLA Jing Huang;Lianjun Feng;Xuelei Chu;Tao Sun; Hanjie Wen;Liping Qin;Yanan Shen."A predominantly ferruginous condition in the Ediacaran deep ocean: Geochemistry of black shales in the Ediacaran Doushantuo Formation, South China".Precambrian Research 295(2017):12-23.
Files in This Item:
File Name/Size DocType Version Access License
A predominantly ferr(2469KB)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
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Jing Huang;Lianjun Feng;Xuelei Chu;Tao Sun; Hanjie Wen;Liping Qin;Yanan Shen]'s Articles
Baidu academic
Similar articles in Baidu academic
[Jing Huang;Lianjun Feng;Xuelei Chu;Tao Sun; Hanjie Wen;Liping Qin;Yanan Shen]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Jing Huang;Lianjun Feng;Xuelei Chu;Tao Sun; Hanjie Wen;Liping Qin;Yanan Shen]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: A predominantly ferruginous condition in the Ediacaran deep ocean_ Geochemistry of black shales in the Ediacaran Doushantuo Formation, 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.