DOI: 10.5194/cp-14-857-2018
Scopus记录号: 2-s2.0-85049156821
论文题名: The influence of carbonate platform interactions with subduction zone volcanism on palaeo-atmospheric CO2 since the Devonian
作者: Pall J. ; Zahirovic S. ; Doss S. ; Hassan R. ; Matthews K.J. ; Cannon J. ; Gurnis M. ; Moresi L. ; Lenardic A. ; Dietmar Müller R.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期: 6 起始页码: 857
结束页码: 870
语种: 英语
Scopus关键词: active margin
; carbon dioxide
; carbon flux
; carbonate platform
; continental arc
; Devonian
; feedback mechanism
; Jurassic-Cretaceous boundary
; paleoclimate
; paleoenvironment
; Paleogene
; periodicity
; plate motion
; reservoir
; subduction zone
; volcanism
; wavelet analysis
英文摘要: The CO2 liberated along subduction zones through intrusive/extrusive magmatic activity and the resulting active and diffuse outgassing influences global atmospheric CO2. However, when melts derived from subduction zones intersect buried carbonate platforms, decarbonation reactions may cause the contribution to atmospheric CO2 to be far greater than segments of the active margin that lacks buried carbon-rich rocks and carbonate platforms. This study investigates the contribution of carbonate-intersecting subduction zones (CISZs) to palaeo-atmospheric CO2 levels over the past 410 million years by integrating a plate motion and plate boundary evolution model with carbonate platform development through time. Our model of carbonate platform development has the potential to capture a broader range of degassing mechanisms than approaches that only account for continental arcs. Continuous and cross-wavelet analyses as well as wavelet coherence are used to evaluate trends between the evolving lengths of carbonate-intersecting subduction zones, non-carbonate-intersecting subduction zones and global subduction zones, and are examined for periodic, linked behaviour with the proxy CO2 record between 410Ma and the present. Wavelet analysis reveals significant linked periodic behaviour between 60 and 40Ma, when CISZ lengths are relatively high and are correlated with peaks in palaeo-atmospheric CO2, characterised by a 32-48Myr periodicity and a ∼ 8-12Myr lag of CO2 peaks following CISZ length peaks. The linked behaviour suggests that the relative abundance of CISZs played a role in affecting global climate during the Palaeogene. In the 200-100Ma period, peaks in CISZ lengths align with peaks in palaeo-atmospheric CO2, but CISZ lengths alone cannot be determined as the cause of a warmer Cretaceous-Jurassic climate. Nevertheless, across the majority of the Phanerozoic, feedback mechanisms between the geosphere, atmosphere and biosphere likely played dominant roles in modulating climate. Our modelled subduction zone lengths and carbonate-intersecting subduction zone lengths approximate magmatic activity through time, and can be used as input into fully coupled models of CO2 flux between deep and shallow carbon reservoirs. © 2018 Copernicus GmbH. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109555
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: EarthByte Group, School of Geosciences, University of Sydney, Sydney, NSW 2006, Australia; Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia; Arctic Institute of North America, University of Calgary, Calgary, AB T2N 1N4, Canada; Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, United States; School of Earth Sciences, University of Melbourne, Melbourne, VIC 3010, Australia; Department of Earth Science, Rice University, Houston, TX 77005, United States
Recommended Citation:
Pall J.,Zahirovic S.,Doss S.,et al. The influence of carbonate platform interactions with subduction zone volcanism on palaeo-atmospheric CO2 since the Devonian[J]. Climate of the Past,2018-01-01,14(6)