IGGCAS OpenIR  > 油气资源研究院重点实验室
Formation, diagenesis and palaeoenvironmental significance of upper Ediacaran fibrous dolomite cements
Hu, Yongjie1,2,3,4; Cai, Chunfang1,3,4,5; Liu, Dawei1,3,4; Pederson, Chelsea L.2; Jiang, Lei1,3; Shen, Anjiang6; Immenhauser, Adrian2
2019-12-06
Source PublicationSEDIMENTOLOGY
ISSN0037-0746
Pages27
AbstractNeoproterozoic marine dolomite cements represent reliable, albeit complex, archives of their palaeoenvironment. Petrological and high-resolution geochemical data from well-preserved fibrous dolomite and pyrite in the upper Ediacaran (ca 551 center dot 1 to 548 center dot 0 Ma) Dengying Formation in south-west China are presented and discussed here. The aim of this research is to reconstruct the redox state of late Ediacaran shallow seawater and porewater in the Sichuan Basin using early marine diagenetic fabrics. Based on crystalline texture and axis, four basic types of fibrous dolomite cements formed penecontemporaneously in a microbialite reef setting at the platform margin: (i) bladed dolomites (replacement from a high-Mg calcite precursor); (ii) fascicular fast dolomites (replacement from an aragonitic precursor); (iii) fascicular slow dolomites; and (iv) radial slow dolomites. The latter two fabrics are considered direct marine porewater precipitates due to their length-slow character, cathodoluminescent zonation, and enriched copper and cobalt concentrations. Marine cements yield rare earth element and yttrium patterns comparable to modern seawater and represent a refined set of archive data relative to previously published bulk dolostones. Redox-sensitive elements and cathodoluminescence indicate that the fascicular fast dolomites formed in suboxic seawater, while fascicular slow and radial slow dolomites formed in euxinic marine porewaters. Microbial sulphate reduction during the formation of fascicular slow and radial slow dolomites is recognized by nanometre-scale spheroidal ankerite and sulphur-containing dolomite, and intergrown pyrite grains with U-shaped delta S-34 transects. Data shown here suggest predominantly suboxic shallow late Ediacaran seawater and euxinic marine porewaters, with microbial activity promoting the direct precipitation of dolomite.
KeywordDolomite geochemistry Ediacaran euxinic marine porewater LA-ICP-MS NanoSIMS suboxic seawater
DOI10.1111/sed.12683
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China
WOS KeywordRARE-EARTH-ELEMENTS ; SINIAN DENGYING FORMATION ; BECK SPRING DOLOMITE ; SOUTH CHINA ; SULFATE REDUCTION ; SICHUAN BASIN ; MICROBIAL MEDIATION ; CAMBRIAN TRANSITION ; REEFAL CARBONATES ; REDOX CONDITION
Language英语
Funding ProjectNatural Science Foundation of China[41730424] ; Natural Science Foundation of China[41672143] ; Natural Science Foundation of China[2017ZX05008003-040]
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000500954700001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95813
Collection油气资源研究院重点实验室
Corresponding AuthorCai, Chunfang
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
2.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Univ Str 150, D-44801 Bochum, Germany
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Yangtze Univ, Key Lab Explorat Technol Oil & Gas Resources, Minist Educ, Wuhan 430100, Hubei, Peoples R China
6.PetroChina Hangzhou Res Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China
First Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Petroleum Resource Research, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Hu, Yongjie,Cai, Chunfang,Liu, Dawei,et al. Formation, diagenesis and palaeoenvironmental significance of upper Ediacaran fibrous dolomite cements[J]. SEDIMENTOLOGY,2019:27.
APA Hu, Yongjie.,Cai, Chunfang.,Liu, Dawei.,Pederson, Chelsea L..,Jiang, Lei.,...&Immenhauser, Adrian.(2019).Formation, diagenesis and palaeoenvironmental significance of upper Ediacaran fibrous dolomite cements.SEDIMENTOLOGY,27.
MLA Hu, Yongjie,et al."Formation, diagenesis and palaeoenvironmental significance of upper Ediacaran fibrous dolomite cements".SEDIMENTOLOGY (2019):27.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Hu, Yongjie]'s Articles
[Cai, Chunfang]'s Articles
[Liu, Dawei]'s Articles
Baidu academic
Similar articles in Baidu academic
[Hu, Yongjie]'s Articles
[Cai, Chunfang]'s Articles
[Liu, Dawei]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Hu, Yongjie]'s Articles
[Cai, Chunfang]'s Articles
[Liu, Dawei]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

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