GSTDTAP  > 地球科学
DOI10.1038/s41561-018-0110-z
Indian Ocean floor deformation induced by the Reunion plume rather than the Tibetan Plateau
Iaffaldano, G.1; Davies, D. R.2; DeMets, C.3
2018-05-01
发表期刊NATURE GEOSCIENCE
ISSN1752-0894
EISSN1752-0908
出版年2018
卷号11期号:5页码:362-+
文章类型Article
语种英语
国家Denmark; Australia; USA
英文摘要

The central Indian Ocean is considered the archetypal diffuse oceanic plate boundary. Data from seismic stratigraphy and deep-sea drilling indicate that the contractional deformation of the Indian Ocean lithosphere commenced at 15.4-13.9 Ma, but experienced a sharp increase at 8-7.5 Ma. This has been maintained through to the present day, with over 80% of the shortening accrued over the past 8 Myr. Here we build on previous efforts to refine the form, timing and magnitude of the regional plate-motion changes by mitigating the noise in reconstructed Indian and Capricorn plate motions relative to Somalia. Our noise-mitigated reconstructions tightly constrain the significant speed up of the Capricorn plate over the past 8 Myr and demonstrate that the history of the Indian Ocean floor deformation cannot be explained without this plate-motion change. We propose that the Capricorn plate-motion change is driven by an increase in the eastward-directed asthenospheric flow associated with the adjacent Reunion plume, and quantitatively demonstrate the viability of this hypothesis. Our inference is supported by volcanic age distributions along the Reunion hotspot track, the anomalously high residual bathymetry of the Central Indian Ridge, full-waveform seismic tomography of the underlying asthenosphere and geochemical observations from the Central Indian Ridge. These findings challenge the commonly accepted link between the deformation of the Indian Ocean floor and the Tibetan Plateau's orogenic evolution and demonstrate that temporal variations in upwelling mantle flow can drive major tectonic events at the Earth's surface.


领域地球科学 ; 气候变化
收录类别SCI-E
WOS记录号WOS:000431168900020
WOS关键词20 MA ; INVERSE PROBLEMS ; POISEUILLE FLOW ; MANTLE PLUMES ; MOTION ; MODEL ; VISCOSITY ; DYNAMICS ; DRIVEN ; DEPTH
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/35065
专题地球科学
气候变化
作者单位1.Univ Copenhagen, Dept Geosci & Nat Resource Management, Copenhagen, Denmark;
2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia;
3.Univ Wisconsin, Dept Geosci, Madison, WI USA
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GB/T 7714
Iaffaldano, G.,Davies, D. R.,DeMets, C.. Indian Ocean floor deformation induced by the Reunion plume rather than the Tibetan Plateau[J]. NATURE GEOSCIENCE,2018,11(5):362-+.
APA Iaffaldano, G.,Davies, D. R.,&DeMets, C..(2018).Indian Ocean floor deformation induced by the Reunion plume rather than the Tibetan Plateau.NATURE GEOSCIENCE,11(5),362-+.
MLA Iaffaldano, G.,et al."Indian Ocean floor deformation induced by the Reunion plume rather than the Tibetan Plateau".NATURE GEOSCIENCE 11.5(2018):362-+.
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