DOI: 10.1038/ngeo3032
论文题名: Magmatic pulse driven by sea-level changes associated with the Messinian salinity crisis
作者: Sternai P. ; Caricchi L. ; Garcia-Castellanos D. ; Jolivet L. ; Sheldrake T.E. ; Castelltort S.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 10 起始页码: 783
结束页码: 787
语种: 英语
Scopus关键词: dike
; drawdown
; extreme event
; igneous province
; lithosphere
; magmatism
; Messinian
; partial melting
; sea level change
; Mediterranean Sea
英文摘要: Between 5 and 6 million years ago, during the so-called Messinian salinity crisis, the Mediterranean basin became a giant salt repository. The possibility of abrupt and kilometre-scale sea-level changes during this extreme event is debated. Messinian evaporites could signify either deep- or shallow-marine deposits, and ubiquitous erosional surfaces could indicate either subaerial or submarine features. Significant and fast reductions in sea level unload the lithosphere, which can increase the production and eruption of magma. Here we calculate variations in surface load associated with the Messinian salinity crisis and compile the available time constraints for pan-Mediterranean magmatism. We show that scenarios involving a kilometre-scale drawdown of sea level imply a phase of net overall lithospheric unloading at a time that appears synchronous with a magmatic pulse from the pan-Mediterranean igneous provinces. We verify the viability of a mechanistic link between unloading and magmatism using numerical modelling of decompression partial mantle melting and dyke formation in response to surface load variations. We conclude that the Mediterranean magmatic record provides an independent validation of the controversial kilometre-scale evaporative drawdown and sheds new light on the sensitivity of magmatic systems to the surface forcing. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105704
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Earth Sciences, University of Geneva, Geneva, Switzerland; Instituto de Ciencias de la Tierra Jaume Almera, ICTJA-CSIC, Barcelona, Spain; Intitut des Sciences de la Terre d'Orléans, University of Orléans, Orléans, France
Recommended Citation:
Sternai P.,Caricchi L.,Garcia-Castellanos D.,et al. Magmatic pulse driven by sea-level changes associated with the Messinian salinity crisis[J]. Nature Geoscience,2017-01-01,10(10)