DOI: 10.1016/j.epsl.2018.05.016
Scopus记录号: 2-s2.0-85047885861
论文题名: Did climate changes trigger the Late Devonian Kellwasser Crisis? Evidence from a high-resolution conodont δ18OPO4 record from South China
作者: Huang C. ; Joachimski M.M. ; Gong Y.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 495 起始页码: 174
结束页码: 184
语种: 英语
英文关键词: conodont
; Devonian
; oxygen isotope
; palaeotemperature
; South China
Scopus关键词: Biodiversity
; Deposition
; Isotopes
; Organic carbon
; Oxygen
; Phosphate minerals
; Surface waters
; conodont
; Devonians
; Oxygen isotopes
; palaeotemperature
; South China
; Climate change
; climate effect
; climate variation
; conodont
; Devonian
; extreme event
; mass extinction
; oxygen isotope
; paleoatmosphere
; paleoclimate
; paleotemperature
; reconstruction
; China
; Metazoa
英文摘要: The impact of climate change on biodiversity has been the focus of studies on the Phanerozoic biotic crises. However, it is still controversial whether climate change has caused the Frasnian–Famennian (F–F) biotic crisis since there is no unequivocal view on the global climate change during this critical period. In order to reconstruct palaeotemperatures during the F–F transition in South China (eastern Palaeotethys), a high-resolution oxygen isotope (δ18OPO4) record was obtained based on 104 measurements of conodont apatite from the Yangdi section. The oxygen isotope record based on mono-generic samples reveals an increase in δ18OPO4 by 0.7‰ in the Lower Kellwasser horizon (LKH) and 1.4‰ in the Upper Kellwasser horizon (UKH), translating into low-latitude surface water cooling of ∼3 °C and ∼6 °C, respectively. These two δ18OPO4 shifts agree well with the time-equivalent δ18OPO4 records from the western Palaeotethys, suggesting that two climate cooling pulses in conjunction with the deposition of the Kellwasser horizons are a global signal during the F–F transition. The positive shift of δ18OPO4 coincides with positive excursion in carbon isotope of carbonates (δ13Ccarb) in the UKH, indicating that enhanced burial of organic carbon resulted in a drop in atmospheric pCO2 and thus global climate cooling. Cooling started immediately before the Upper Kellwasser biotic crisis, with the lowest temperature documented at the top of the UKH. Climate cooling during the deposition of the LKH is observed in conjunction with the sharp decline in metazoan reefs. The coincidence of cooling and the Kellwasser biotic crisis suggests that global cooling played a major role in the collapse of ecosystems. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109818
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Key Laboratory of Carbonate Reservoir of CNPC, Southwest Petroleum University, Chengdu, 610500, China; GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Schlossgarten 5, Erlangen, 91054, Germany; State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
Recommended Citation:
Huang C.,Joachimski M.M.,Gong Y.. Did climate changes trigger the Late Devonian Kellwasser Crisis? Evidence from a high-resolution conodont δ18OPO4 record from South China[J]. Earth and Planetary Science Letters,2018-01-01,495