globalchange  > 气候变化与战略
DOI: 10.1038/s41561-021-00780-7
论文题名:
A record of plume-induced plate rotation triggering subduction initiation
作者: van Hinsbergen D.J.J.; Steinberger B.; Guilmette C.; Maffione M.; Gürer D.; Peters K.; Plunder A.; McPhee P.J.; Gaina C.; Advokaat E.L.; Vissers R.L.M.; Spakman W.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期:8
起始页码: 626
结束页码: 630
语种: 英语
英文摘要: The formation of a global network of plate boundaries surrounding a mosaic of lithospheric fragments was a key step in the emergence of Earth’s plate tectonics. So far, propositions for plate boundary formation are regional in nature; how plate boundaries are created over thousands of kilometres in geologically short periods remains elusive. Here we show from geological observations that a >12,000-km-long plate boundary formed between the Indian and African plates around 105 Myr ago. This boundary comprised subduction segments from the eastern Mediterranean region to a newly established India–Africa rotation pole in the west Indian Ocean, where it transitioned into a ridge between India and Madagascar. We identify coeval mantle plume rise below Madagascar–India as the only viable trigger of this plate rotation. For this, we provide a proof of concept by torque balance modelling, which reveals that the Indian and African cratonic keels were important in determining plate rotation and subduction initiation in response to the spreading plume head. Our results show that plumes may provide a non-plate-tectonic mechanism for large-plate rotation, initiating divergent and convergent plate boundaries far away from the plume head. We suggest that this mechanism may be an underlying cause of the emergence of modern plate tectonics. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169826
Appears in Collections:气候变化与战略

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作者单位: Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; GFZ German Research Centre for Geosciences, Potsdam, Germany; Centre of Earth Evolution and Dynamics (CEED), University of Oslo, Oslo, Norway; Département de Géologie et de Génie Géologique, Université Laval, Quebec, QC, Canada; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; School of Earth and Environmental Sciences, University of Queensland, St Lucia, QLD, Australia; BRGM, Orléans, France; School for Earth and Atmospheric Sciences, Queensland University of Technology, Brisbane, QLD, Australia

Recommended Citation:
van Hinsbergen D.J.J.,Steinberger B.,Guilmette C.,et al. A record of plume-induced plate rotation triggering subduction initiation[J]. Nature Geoscience,2021-01-01,14(8)
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