NIGPAS OpenIR  > 中国科学院南京地质古生物研究所
Demise of Ediacaran dolomitic seas marks widespread biomineralization on the Siberian Platform
Wood, R. A.1; Zhuravlev, A. Yu.2; Sukhov, S. S.3; Zhu, M.4; Zhao, F.4
2017-01
Source PublicationGEOLOGY
ISSN0091-7613
Volume45Issue:1Pages:27-30
AbstractThe trigger for biomineralization of metazoans in the terminal Ediacaran, ca. 550 Ma, has been suggested to be the rise of oxygenation or an increase in seawater Ca concentration, but geochemical and fossil data have not been fully integrated to demonstrate cause and effect. Here we combine the record of macrofossils with early marine carbonate cement distribution within a relative depth framework for terminal Ediacaran to Cambrian successions on the eastern Siberian Platform, Russia, to interrogate the evolution of seawater chemistry and biotic response. Prior to ca. 545 Ma, the presence of early marine ferroan dolomite cement suggests dominantly ferruginous anoxic "aragonite-dolomite seas", with a very shallow oxic chemocline that supported mainly soft-bodied macrobiota. After ca. 545 Ma, marine cements changed to aragonite and/or high-Mg calcite, and this coincides with the appearance of widespread aragonite and high-Mg calcite skeletal metazoans, suggesting a profound change in seawater chemistry to "aragonite seas" with a deeper chemocline. By early Cambrian Stage 3, the first marine low-Mg calcite cements appear, coincident with the first low-Mg calcite metazoan skeletons, suggesting a further shift to "calcite seas". We suggest that this evolution of seawater chemistry was caused by enhanced continental denudation that increased the input of Ca into oceans so progressively lowering Mg/Ca, which, combined with more widespread oxic conditions, facilitated the rise of skeletal animals and in turn influenced the evolution of skeletal mineralogy.
DOI10.1130/G38367.1
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000396124000009
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/22873
Collection中国科学院南京地质古生物研究所
Affiliation1.Univ Edinburgh, Sch GeoSci, James Hutton Rd, Edinburgh EH9 3FE, Midlothian, Scotland;
2.Lomonosov Moscow State Univ, Fac Biol, Dept Biol Evolut, Leninskie Gory 1 12, Moscow 119234, Russia;
3.Siberian Sci Res Inst Geol Geophys & Mineral Reso, Krasny Prospekt 67, Novosibirsk 630091, Russia;
4.Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wood, R. A.,Zhuravlev, A. Yu.,Sukhov, S. S.,et al. Demise of Ediacaran dolomitic seas marks widespread biomineralization on the Siberian Platform[J]. GEOLOGY,2017,45(1):27-30.
APA Wood, R. A.,Zhuravlev, A. Yu.,Sukhov, S. S.,Zhu, M.,&Zhao, F..(2017).Demise of Ediacaran dolomitic seas marks widespread biomineralization on the Siberian Platform.GEOLOGY,45(1),27-30.
MLA Wood, R. A.,et al."Demise of Ediacaran dolomitic seas marks widespread biomineralization on the Siberian Platform".GEOLOGY 45.1(2017):27-30.
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
[Wood, R. A.]'s Articles
[Zhuravlev, A. Yu.]'s Articles
[Sukhov, S. S.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wood, R. A.]'s Articles
[Zhuravlev, A. Yu.]'s Articles
[Sukhov, S. S.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wood, R. A.]'s Articles
[Zhuravlev, A. Yu.]'s Articles
[Sukhov, S. S.]'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.