Climate changes in the Middle and Late Ordovician of the tropical belt: The S18O record from the Tunguska Basin of Siberia and its palaeogeographical relation

doi:10.1016/j.palaeo.2025.112765

NIGPAS OpenIR

	Climate changes in the Middle and Late Ordovician of the tropical belt: The S18O record from the Tunguska Basin of Siberia and its palaeogeographical relation
通讯作者	Mannik, Peep([email protected])
	Mannik, Peep 1; Lehnert, Oliver 2,3,4; Joachimski, Michael M.2
	2025-04-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	663 页码:13
摘要	Oxygen isotope studies on Darriwilian to Katian conodonts were performed from two sections of the southwestern Tunguska Basin (Siberia). The new S18Ophos records are compared with data from drill cores in Estonia, located in the Baltoscandian Basin. From this epicontinental basin on Baltica, it has been shown that, besides the general cooling trend in the pre-Hirnantian, the Late Ordovician climate was unstable. Major cooling events are reflected by sea-level lowstands, which are also recognized in the Tunguska Basin. The new S18Ophos records from Siberia show differences but also similarities to the S18Ophos trends from Baltica. In contrast to the general cooling trend characterizing the Upper Ordovician on Baltica, S18Ophos data from the Tunguska Basin suggest that, beside prominent cooling events recorded as positive excursions in the S18O curves from both palaeocontinents, the sea surface temperature stayed relatively stable on Siberia. Several of the cooling episodes (CE's) known from this time interval on Baltica were identified in the succession of Siberia: the Early Nabala CE is observed in the upper Mangazea Formation, and the Vormsi CE in the uppermost part of the formation, the Haljala and Keila cooling episodes probably correspond to the intervals in the lower Mangazea Formation, and the Early Pirgu CE to a small S18Ophos peak in the lowermost Dolbor Formation. The most pronounced cooling episode on Siberia is recorded in the upper Darriwilian, within the lower Ust'Stolbovaya Formation, and reflects the middle Darriwilian glaciation. The recognition of the same cooling episodes on two palaeocontinents provides clear evidence that they represent global climate changes but also contributes to an improvement in the dating of the corresponding Siberian strata and of their intercontinental correlation. The offset of S18Ophos records between Baltica and Siberia can be tracked back to oceanic circulation patterns where cold-water currents in the southern hemisphere bring colder waters northwards into the Baltoscandian Basin at the western side of Baltica while Siberia remained stable in the southern subtropics affected only by tropical warm water currents.
关键词	Darriwilian-Katian Conodonts Stable isotope chemostratigraphy Palaeoclimate Siberia Baltica
DOI	10.1016/j.palaeo.2025.112765
收录类别	SCI
语种	英语
关键词[WOS]	ACID TECHNIQUE ; ISOTOPE ; EVOLUTION ; PLATFORM ; TRAPS ; EXTENSION ; CONODONTS ; MA
资助项目	Estonian Research Council[PRG1701] ; Deutsche Forschungsgemeinschaft[LE 867/12-1] ; Deutsche Forschungsgemeinschaft[13-1]
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:001422470400001
项目资助者	Estonian Research Council ; Deutsche Forschungsgemeinschaft
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44914
专题	中国科学院南京地质古生物研究所
通讯作者	Mannik, Peep
作者单位	1.Tallinn Univ Technol, Inst Geol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia 2.Friedrich Alexander Univ FAU Erlangen Nurnberg, Geozent Nordbayern, Schlossgarten 5, D-91054 Erlangen, Germany 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, Nanjing, Peoples R China 4.Czech Univ Life Sci Prague, Fac Environm Sci, Prague 6, Czech Republic
推荐引用方式 GB/T 7714	Mannik, Peep,Lehnert, Oliver,Joachimski, Michael M.. Climate changes in the Middle and Late Ordovician of the tropical belt: The S18O record from the Tunguska Basin of Siberia and its palaeogeographical relation[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2025,663:13.
APA	Mannik, Peep,Lehnert, Oliver,&Joachimski, Michael M..(2025).Climate changes in the Middle and Late Ordovician of the tropical belt: The S18O record from the Tunguska Basin of Siberia and its palaeogeographical relation.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,663,13.
MLA	Mannik, Peep,et al."Climate changes in the Middle and Late Ordovician of the tropical belt: The S18O record from the Tunguska Basin of Siberia and its palaeogeographical relation".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 663(2025):13.