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DOI	10.1016/j.epsl.2020.116240
	Seismological evidence for thermo-chemical heterogeneity in Earth's continental mantle
	Munch F.D.; Khan A.; Tauzin B.; van Driel M.; Giardini D.
发表日期	2020
ISSN	0012821X
卷号	539
英文摘要	Earth's thermo-chemical structure exerts a fundamental control on mantle convection, plate tectonics, and surface volcanism. There are indications that mantle convection occurs as an intermittent-stage process between layered and whole mantle convection in interaction with a compositional stratification at 660 km depth. However, the presence and possible role of any compositional layering in the mantle remains to be ascertained and understood. By interfacing inversion of a novel global seismic data set with petrologic phase equilibrium calculations, we show that a compositional boundary is not required to explain short- and long-period seismic data sensitive to the upper mantle and transition zone beneath stable continental regions; yet, radial enrichment in basaltic material reproduces part of the complexity present in the data recorded near subduction zones and volcanically active regions. Our findings further indicate that: 1) cratonic regions are characterized by low mantle potential temperatures and significant lateral variability in mantle composition; and 2) chemical equilibration seems more difficult to achieve beneath stable cratonic regions. These findings suggest that the lithologic integrity of the subducted basalt and harzburgite may be better preserved for geologically significant times underneath cratonic regions. © 2020 Elsevier B.V.
关键词	mantle thermo-chemistry mineral phase equilibrium calculations receiver functions surface wave dispersion
英文关键词	Geophysical prospecting; Seismic response; Continental mantle; Fundamental control; Mantle composition; Mantle convection; Phase equilibrium calculation; Potential temperature; Stable continental regions; Thermo-chemical structures; Seismic waves; basalt; data set; harzburgite; heterogeneity; mantle convection; petrology; plate tectonics; seismic data; seismology; subduction zone; upper mantle; volcanism
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202801
作者单位	Institute of Geophysics, ETH Zurich, Switzerland; Institute of Theoretical Physics, University of Zurich, Switzerland; Laboratoire de Géologie de Lyon, Terre, Planètes, Environnement, Université de Lyon, Ecole Normale Supérieure de Lyon, CNRS, France; Research School of Earth Sciences, Australian National University, Australia
推荐引用方式 GB/T 7714	Munch F.D.,Khan A.,Tauzin B.,et al. Seismological evidence for thermo-chemical heterogeneity in Earth's continental mantle[J],2020,539.
APA	Munch F.D.,Khan A.,Tauzin B.,van Driel M.,&Giardini D..(2020).Seismological evidence for thermo-chemical heterogeneity in Earth's continental mantle.Earth and Planetary Science Letters,539.
MLA	Munch F.D.,et al."Seismological evidence for thermo-chemical heterogeneity in Earth's continental mantle".Earth and Planetary Science Letters 539(2020).