气候变化领域集成服务门户(CCPortal): A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen; Svalbard

CCPortal

DOI	10.1016/j.palaeo.2020.109732
	A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen; Svalbard
	Zuchuat V.; Sleveland A.R.N.; Twitchett R.J.; Svensen H.H.; Turner H.; Augland L.E.; Jones M.T.; Hammer Ø.; Hauksson B.T.; Haflidason H.; Midtkandal I.; Planke S.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	Research on the Permian-Triassic boundary (PTB) along the northern margins of Pangaea (exposed today in the Arctic region) has been heavily reliant on field observations, where data resolution was consequently determined by outcrop condition and accessibility. Core drilling in central Spitsbergen allowed for a near-complete recovery of two ~90 m cores through the PTB. Analyses of the core and nearby outcrops include stratigraphic logging and sampling, XRF scanning, petrography, biostratigraphy, isotope geochemistry, and geochronology. The First Appearance Datum (FAD) of H. parvus in Svalbard places the base of the Triassic ca. 4 m above the base of the Vikinghøgda Formation, and ca. 2.50 m above the End-Permian Mass Extinction (EPME) and its associated sharp negative δ13C. The PTB therefore falls within the Reduviasporonites chalastus Assemblage Zone in Svalbard. Precise U-Pb TIMS dating of two zircon crystals in a tephra layer just above the first documented Hindeodus parvus in Svalbard gives an age of 252.13 ± 0.62 Ma. High-resolution palaeoenvironmental proxies, including Si/kcps (kilo counts per second), Zr/Rb, K/Ti, Fe/K, and V/Cr, indicate a transition towards a more arid climate in the earliest Triassic, contemporaneous with prolonged bottom-water dysoxic/anoxic conditions, following an increase in volcanic activity in the Late Permian. Statistical analysis of Zr/Rb, K/Ti and V/Cr elemental ratios suggests that the system was impacted by long-eccentricity (400 kyr) cyclicity. The δ13C excursion in organic carbon (δ13Corg) record signals a large negative carbon isotope excursion (CIE) associated with the mass extinction event, but also records a second, smaller negative CIE ca. 22 m above this interval. This younger δ13Corg excursion correlates to similar CIEs in the Dienerian (late Induan) records of other sections, notably in the Tethys Ocean, which have been interpreted as recording a small biotic crisis during the post-extinction recovery. Evidence of this negative CIE in Spitsbergen suggests that the Dienerian crisis may have been global in extent. The negative δ13Corg values are associated with evidence for dysoxia or anoxia in the core, and the occurrence of tephra layers in the same interval suggests a possible connection between the Dienerian crisis and a discrete episode of volcanic activity. © 2020 The Authors
英文关键词	Climate change; Dienerian crisis; Hindeodus parvus; Long eccentricity; Permian-Triassic boundary
语种	英语
scopus关键词	anoxia; biostratigraphy; carbon isotope; drilling; geochronology; lithostratigraphy; mass spectrometry; organic carbon; paleoenvironment; Permian-Triassic boundary; tephra; zircon; Arctic; Spitsbergen; Svalbard; Svalbard and Jan Mayen; Hindeodus parvus
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150426
作者单位	Department of Geosciences, University of Oslo, Sem Sælands Vei 1, Oslo, 0371, Norway; Natural History Museum, Earth Sciences Department, London, SW7 5BD, United Kingdom; Centre for Earth Evolution and Dynamics (CEED), Department of Geosciences, University of Oslo, Sem Sælands Vei 1, Oslo, 0371, Norway; Natural History Museum, University of Oslo, Pb. 1172 Blindern, Oslo, 0318, Norway; Geodata AS, Schweigaards gate 28, Oslo, 0191, Norway; Department of Earth Science, University of Bergen, Allegate 41, Bergen, 5020, Norway; Volcanic Basin Petroleum Research (VBPR), Høienhald, Blindernveien 5, Oslo, 0361, Norway
推荐引用方式 GB/T 7714	Zuchuat V.,Sleveland A.R.N.,Twitchett R.J.,et al. A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen; Svalbard[J],2020,554.
APA	Zuchuat V..,Sleveland A.R.N..,Twitchett R.J..,Svensen H.H..,Turner H..,...&Planke S..(2020).A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen; Svalbard.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Zuchuat V.,et al."A new high-resolution stratigraphic and palaeoenvironmental record spanning the End-Permian Mass Extinction and its aftermath in central Spitsbergen; Svalbard".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).