NIGPAS OpenIR
Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitudes
Popov, Leonid E.1; Alvaro, J. Javier2; Holmer, Lars E.3,4,5; Bauert, Heikki6,13; Pour, Mansoureh Ghobadi1,3,7; Dronov, Andrei, V8,9; Lehnert, Oliver10,11,12; Hints, Olle6; Mannik, Peep6; Zhang, Zhifei4,5; Zhang, Zhiliang4,5
2019-05-10
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume9Pages:10
Abstract

The Tremadocian (Early Ordovician) is currently considered a time span of greenhouse conditions with tropical water surface temperature estimates, interpolated from oxygen isotopes, approaching 40 degrees C. In the mid-latitude Baltoscandian Basin, conodonts displaying low delta O-18 values, which suggest high temperatures (>40 degrees C) in the water column, are in contrast with the discovery of contemporaneous glendonite clusters, a pseudomorph of ikaite (CaCO3 center dot 6H(2)O) traditionally considered as indicator of near-freezing bottom-water conditions. The massive precipitation of this temperature sensitive mineral is associated with transgressive conditions and high organic productivity. As a result, the lower Tremadocian sediments of Baltoscandia apparently contain both "greenhouse" pelagic signals and near-freezing substrate indicators. This paradox points to other primary controlling mechanisms for ikaite precipitation in kerogenous substrates, such as carbonate alkalinity, pH and Mg/Ca ratios, as recently constrained by laboratory experiments. Preservation of "hot" conodonts embedded in kerogenous shales rich in delta O-18-depleted glendonites suggests both the onset of sharp thermal stratification patterns in a semi-closed basin and the assumed influence of isotopically depleted freshwater yielded by fluvial systems.

DOI10.1038/s41598-019-43707-4
Language英语
WOS KeywordOXYGEN ISOTOPIC COMPOSITION ; SPATIAL-DISTRIBUTION ; EARLY ORDOVICIAN ; BLACK SHALES ; WATER ; SEA ; PHOSPHATE ; CHEMOSTRATIGRAPHY ; PSEUDOMORPHS ; DELTA-O-18
Funding ProjectSpanish MINECO[CGL2017-87631-P] ; Estonian Research Council[PUT 378] ; Deutsche Forschungsgemeinschaft (DFG)[LE 867/8-1] ; Deutsche Forschungsgemeinschaft (DFG)[LE 867/8-2] ; Golestan University[6762] ; Swedish Research Council (VR)[2018-03390] ; Zhongjian Yang Scholarship from the Department of Geology, Northwest University, Xi'an ; National Natural Science Foundation of China[41425008] ; National Natural Science Foundation of China[41621003] ; National Natural Science Foundation of China[41720104002] ; 111 Centre[D17013] ; Russian Governmental Program of Competitive Growth of Kazan Federal University ; Program for Fundamental Research of the Presidium of Russian Academy of Sciences[19] ; Program for Fundamental Research of the Presidium of Russian Academy of Sciences[0135-2018-0040]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000467543700020
Funding OrganizationSpanish MINECO ; Estonian Research Council ; Deutsche Forschungsgemeinschaft (DFG) ; Golestan University ; Swedish Research Council (VR) ; Zhongjian Yang Scholarship from the Department of Geology, Northwest University, Xi'an ; National Natural Science Foundation of China ; 111 Centre ; Russian Governmental Program of Competitive Growth of Kazan Federal University ; Program for Fundamental Research of the Presidium of Russian Academy of Sciences
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/22322
Collection中国科学院南京地质古生物研究所
Corresponding AuthorPopov, Leonid E.
Affiliation1.Natl Museum Wales, Dept Earth Sci, Cathays Pk, Cardiff CF10 3NP, S Glam, Wales
2.UCM, Inst Geociencias, CSIC, Dr Severo Ochoa 7, Madrid 28040, Spain
3.Dept Earth Sci Palaeobiol, SE-75236 Uppsala, Sweden
4.Northwest Univ, State Key Lab Continental Dynam, Shaanxi Key Lab Early Life & Environm, Xian 710069, Shaanxi, Peoples R China
5.Northwest Univ, Dept Geol, Xian 710069, Shaanxi, Peoples R China
6.Tallinn Univ Technol, Dept Geol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia
7.Golestan Univ, Fac Sci, Dept Geol, Gorgan 4913815739, Golestan, Iran
8.Russian Acad Sci, Geol Inst, 7 Pyzhevskii Lane, Moscow 119017, Russia
9.Kazan Volga Reg Fed Univ, 18 Kremlevskaya St, Kazan 420008, Russia
10.FAU Erlangen Nurnberg, Lithosphere Dynam, GeoZentrum Nordbayern, Schlossgarten 5, D-91054 Erlangen, Germany
11.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
12.Czech Univ Life Sci Prague, Fac Environm Sci, Kamycka 129, Prague 16521 6, Czech Republic
13.Geol Survey Estonia, Tartu Maantee 85, EE-10115 Tallinn, Estonia
Recommended Citation
GB/T 7714
Popov, Leonid E.,Alvaro, J. Javier,Holmer, Lars E.,et al. Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitudes[J]. SCIENTIFIC REPORTS,2019,9:10.
APA Popov, Leonid E..,Alvaro, J. Javier.,Holmer, Lars E..,Bauert, Heikki.,Pour, Mansoureh Ghobadi.,...&Zhang, Zhiliang.(2019).Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitudes.SCIENTIFIC REPORTS,9,10.
MLA Popov, Leonid E.,et al."Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitudes".SCIENTIFIC REPORTS 9(2019):10.
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