DOI: 10.1016/j.earscirev.2020.103404
论文题名: Global carbon cycle perturbations triggered by volatile volcanism and ecosystem responses during the Carnian Pluvial Episode (late Triassic)
作者: Li Z. ; Chen Z.-Q. ; Zhang F. ; Ogg J.G. ; Zhao L.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 211 语种: 英语
中文关键词: C-P cycle model
; Carbon isotopes
; Carbonate factory demise
; Conodont Unitary Association zones
; South China
; Wrangellia LIP
英文关键词: biostratigraphy
; biozonation
; carbon cycle
; conodont
; ecosystem response
; large igneous province
; paleoclimate
; paleoecology
; paleoenvironment
; phosphorus cycle
; trigger mechanism
; volcanic eruption
; volcanism
; China
; Mazzaella
英文摘要: The Carnian Pluvial Episode (CPE) was a dramatic climatic event during the early Late Triassic. The CPE has been recognized worldwide and is marked by the termination of carbonate platform successions and by pronounced negative δ13C excursions (denoted as the CPE excursion). The onset of the CPE has been proposed to be linked with the volatile eruption of the Wrangellia Large Igneous Province (W-LIP). However, this extreme climatic event remains disputed in terms of its precise global correlation, timing of onset, duration, and global magnitude. We compiled a database of 13 conodont biozone-controlled stable-isotope reference sections throughout the Tethyan region. After a reexamination of previously published conodont taxonomy from each section, the statistics on the conodont assemblages/zones yield a global set of 17 high-resolution conodont Unitary Association Zones (UAZs) spanning the entire Carnian successions. A set of age-tie points placed an age model on this global UAZ scale. We added paired δ13Ccarb and δ13Corg data from two sections in South China to other records in this global database, and then normalized all carbon-isotope datasets. A pronounced negative δ13Ccarb excursion with a magnitude of −2± 0.5‰ (from an average of ~3‰ to ~1‰) is evident in these normalized trends and is recognized around the entire Tethys realm. The CPE excursion coincides with conodont UAZ-4 (~234 Ma) through UAZ-8 (within the Mazzaella carnica and Paragondolella praelindae zones, Julian2) and has a duration of ca. 1.5 Myr. We note that an apparent delayed onset of the CPE excursion in South China relative to elsewhere in the Tethys as suggested by previous studies may have been an artifact caused by incomplete conodont-stratigraphic records and/or irregularities in taxonomic identification. A carbon and phosphorus cycle model highlight the strong relationship between the eruption of the W-LIP and CPE excursion; however, the estimated amount of CO2volatiles released by the W-LIP would directly account for only ~25% of the total amount of light‑carbon required to explain the combined magnitude and duration of the global CPE excursion. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166152
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei 430074, China; State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China; State Key Laboratory of Mineral Deposits Research and School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China; Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907-2051, United States
Recommended Citation:
Li Z.,Chen Z.-Q.,Zhang F.,et al. Global carbon cycle perturbations triggered by volatile volcanism and ecosystem responses during the Carnian Pluvial Episode (late Triassic)[J]. Earth Science Reviews,2020-01-01,211