DOI: 10.1016/j.epsl.2020.116377
论文题名: The role of inherited crustal and lithospheric architecture during the evolution of the Red Sea: Insights from three dimensional analogue experiments
作者: Molnar N. ; Cruden A. ; Betts P.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 544 语种: 英语
中文关键词: analogue modelling
; continental tectonics
; extensional tectonics
; inherited structures
; rift morphology
; rifting
英文关键词: Geology
; Continental rifting
; Dynamic constraints
; Laboratory experiments
; Mechanical behaviour
; Morphological elements
; Second-order features
; Three-dimensional analogues
; Threedimensional (3-d)
; Mathematical models
; analog model
; crustal structure
; extensional tectonics
; heterogeneity
; lithospheric structure
; rifting
; tectonic evolution
; three-dimensional modeling
; Indian Ocean
; Red Sea [Indian Ocean]
英文摘要: The Red Sea represents an incipient ocean basin that is in transition from continental rifting to ocean initiation. In this paper we assess how pre-existing mantle and crustal heterogeneities within the African and Arabian lithospheres influenced rift development and propagation using three-dimensional (3D) brittle-ductile analogue laboratory experiments with a rotational boundary condition. Here we investigate the effect of three different configurations: (i) pre-existing rheological heterogeneities in the crust, (ii) in the lithospheric mantle, and (iii) in both. The experimental outcomes show that a linear weak zone in the lithospheric mantle layer exerts a first-order control on the overall mechanical behaviour of extending lithosphere, rift architecture and style of rifting. Crustal heterogeneities control second-order features, such as the trends of the main boundary escarpments along the rift axis. Our experiments reproduce the geological history of the Red Sea and provide key insights on its deformation history in space and time. We provide, for the first time, 3D dynamic constraints on how pre-existing weak zones in the lithosphere have controlled the temporal evolution of the Red Sea and determined its distinctive present-day morphology. The results find that certain morphological elements of the Red Sea can only be explained by the combined effects of crustal and mantle lithosphere heterogeneities. When applied to other natural examples, our findings provide significant new insights on the role of crustal and lithospheric heterogeneities during continental rifting. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165171
Appears in Collections: 气候变化与战略
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作者单位: School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC 3800, Australia
Recommended Citation:
Molnar N.,Cruden A.,Betts P.. The role of inherited crustal and lithospheric architecture during the evolution of the Red Sea: Insights from three dimensional analogue experiments[J]. Earth and Planetary Science Letters,2020-01-01,544