DOI: 10.1002/2016GL070276
论文题名: Late Neogene changes in North America and Antarctica absolute plate motions inferred from the Mid-Atlantic and Southwest Indian Ridges spreading histories
作者: Iaffaldano G. ; DeMets C.
刊名: Geophysical Research Letters
ISSN: 0094-8742
EISSN: 1944-8473
出版年: 2016
卷: 43, 期: 16 起始页码: 8466
结束页码: 8472
语种: 英语
英文关键词: plate motion changes
Scopus关键词: Geophysics
; Absolute plate motions
; Absolute-motion
; Late Neogene
; Pacific plates
; Plate motions
; Relative motion
; Southwest Indian Ridge
; Torque balance
; Earth sciences
英文摘要: Reconstructions of absolute plate motions underpin our understanding of the plate torque balance, but are challenging due to difficulties in inferring well-dated rates and directions of plate movements from hot spot tracks. Useful information about plate dynamics can be inferred from rapid absolute plate motion changes, as these are linked only to the torque(s) that changed. Here we infer late Neogene changes in the absolute motions of North America and possibly Antarctica from changes in the easier-to-determine relative plate motions recorded along the Arctic, northern Mid-Atlantic and Southwest Indian Ridges. We show that Eurasia/North America and Nubia/North America motions changed by the same amount between 8 and 5 Ma, as may have Nubia/Antarctica and Somalia/Antarctica plate motions. By considering additional, independent constraints on Somalia/India plate motion, we argue that a scenario in which North America and Antarctica absolute motions changed is the simplest one that explains the observed changes in relative motions. We speculate that these changes are linked to the late Neogene dynamics of the Pacific plate. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983382391&doi=10.1002%2f2016GL070276&partnerID=40&md5=2781025e55b15f8b5c9318dfe87a389c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9705
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: Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark
Recommended Citation:
Iaffaldano G.,DeMets C.. Late Neogene changes in North America and Antarctica absolute plate motions inferred from the Mid-Atlantic and Southwest Indian Ridges spreading histories[J]. Geophysical Research Letters,2016-01-01,43(16).