DOI: 10.1016/j.epsl.2018.05.048
Scopus记录号: 2-s2.0-85048720523
论文题名: Two-stage Red Sea rifting inferred from mantle earthquakes in Neoproterozoic lithosphere
作者: Blanchette A.R. ; Klemperer S.L. ; Mooney W.D. ; Zahran H.M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 497 起始页码: 92
结束页码: 101
语种: 英语
英文关键词: cratonic rejuvenation
; lithosphere–asthenosphere boundary
; mantle earthquakes
; Red Sea rifting
; Saudi Arabia
Scopus关键词: Heat transfer
; Seismic waves
; Thermoanalysis
; cratonic rejuvenation
; Lithospheric mantle
; Lithospheric thinning
; Red sea
; Saudi Arabia
; Structural constraints
; Temperature dependent
; Thermal equilibriums
; Earthquakes
; Calluna vulgaris
英文摘要: We use earthquake geothermometry, measured heat flow, and structural constraints from P-wave receiver functions to model the thermal evolution of the lithosphere beneath Harrat Lunayyir. We suggest that the lithosphere thinned to its present 60-km thickness in a second stage of lithospheric thinning at 15–12 Ma following initial Red Sea extension at ∼27 Ma. Harrat Lunayyir is an active volcanic field located in the Arabian Shield >150 km east of the Red Sea rift axis. In the lithospheric mantle beneath Harrat Lunayyir we locate 64 high-frequency earthquakes at depths of 42–48 km, all with mL≤2.5. These brittle-failure earthquakes must have nucleated at relatively low temperatures, based upon global maximum nucleation depths and temperature-dependent-deformation experimental results. Therefore, the mantle earthquakes show that the upper mantle lithosphere is not in thermal equilibrium with the shallow (60 km) underlying asthenosphere. Our thermal modeling indicates that the lithosphere beneath Harrat Lunayyir thinned to its current 60-km thickness at 12 ± 2 Ma, as constrained by thermal modeling of: (1) surface heat-flow; (2) the depth to the mid-crustal brittle–ductile transition, and (3) the depth to the upper-mantle brittle–ductile transition. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109781
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: Department of Geophysics, Stanford University, Stanford, CA 94305, United States; United States Geological Survey, Earthquake Science Center, Menlo Park, CA 94025, United States; Saudi Geological Survey, Jeddah, 21514, Saudi Arabia
Recommended Citation:
Blanchette A.R.,Klemperer S.L.,Mooney W.D.,et al. Two-stage Red Sea rifting inferred from mantle earthquakes in Neoproterozoic lithosphere[J]. Earth and Planetary Science Letters,2018-01-01,497