DOI: 10.1002/2016GL068424
论文题名: Evidence for slab material under Greenland and links to Cretaceous High Arctic magmatism
作者: Shephard G.E. ; Trønnes R.G. ; Spakman W. ; Panet I. ; Gaina C.
刊名: Geophysical Research Letters
ISSN: 0094-9078
EISSN: 1944-8809
出版年: 2016
卷: 43, 期: 8 起始页码: 3717
结束页码: 3726
语种: 英语
英文关键词: Amerasia Basin
; Arctic
; Greenland
; slab
; subduction
; tectonics
Scopus关键词: Petroleum geology
; Tectonics
; Amerasia Basin
; Arctic
; Greenland
; slab
; subduction
; Seismology
; basalt
; Cretaceous
; gravity
; kinematics
; magma
; magmatism
; mantle convection
; ocean basin
; perturbation
; seismic tomography
; seismic velocity
; subduction
; tectonics
; tholeiite
; tholeiitic basalt
; Amerasian Basin
; Arctic
; Arctic Ocean
; Canada
; Greenland
; Nunavut
; Sverdrup Basin
英文摘要: Understanding the evolution of extinct ocean basins through time and space demands the integration of surface kinematics and mantle dynamics. We explore the existence, origin, and implications of a proposed oceanic slab burial ground under Greenland through a comparison of seismic tomography, slab sinking rates, regional plate reconstructions, and satellite-derived gravity gradients. Our preferred interpretation stipulates that anomalous, fast seismic velocities at 1000-1600 km depth imaged in independent global tomographic models, coupled with gravity gradient perturbations, represent paleo-Arctic oceanic slabs that subducted in the Mesozoic. We suggest a novel connection between slab-related arc mantle and geochemical signatures in some of the tholeiitic and mildly alkaline magmas of the Cretaceous High Arctic Large Igneous Province in the Sverdrup Basin. However, continental crustal contributions are noted in these evolved basaltic rocks. The integration of independent, yet complementary, data sets provides insight into present-day mantle structure, magmatic events, and relict oceans. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84968918623&doi=10.1002%2f2016GL068424&partnerID=40&md5=1672e38c53792d50fdbdd15bc8dd97b1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10041
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Centre for Earth Evolution and Dynamics (CEED), Department of Geosciences, University of Oslo, Oslo, Norway
Recommended Citation:
Shephard G.E.,Trønnes R.G.,Spakman W.,et al. Evidence for slab material under Greenland and links to Cretaceous High Arctic magmatism[J]. Geophysical Research Letters,2016-01-01,43(8).