4.6 Article

Effects of depth- and composition-dependent thermal conductivity and the compositional viscosity ratio on the long-term evolution of large thermochemical piles of primordial material in the lower mantle of the Earth: Insights from 2-D numerical modeling

Related references

Note: Only part of the references are listed.
Article Geochemistry & Geophysics

Influence of heterogeneous thermal conductivity on the long-term evolution of the lower-mantle thermochemical structure: implications for primordial reservoirs

Joshua Martin Guerrero et al.

Summary: The effect of heterogeneous thermal conductivity on the stability of primordial material reservoirs in the mantle is examined using 2D spherical annulus geometry simulations. The depth-dependent profiles of mantle conductivity in numerical models often mask the effects of temperature and composition dependencies. By considering these dependencies and the reduction in thermochemical pile conductivity, it is found that a depth-dependent ratio of at least 9 is needed for stable primordial reservoirs. When the lowermost mantle's mean conductivity is greater than twice the surface conductivity, reservoirs can remain stable for very long periods of time.

SOLID EARTH (2023)

Article Geochemistry & Geophysics

Radiative thermal conductivity of single-crystal bridgmanite at the core-mantle boundary with implications for thermal evolution of the Earth

Motohiko Murakami et al.

Summary: The Earth has been releasing vast amounts of heat from its interior to the surface, driving mantle convection and tectonic activities. The radiative thermal conductivity of bridgmanite at the core-mantle boundary has been revealed to be substantially high, leading to a higher heat flow from the core and more vigorous mantle convection than expected. This higher cooling efficiency of the mantle may weaken tectonic activities more rapidly than conventionally believed.

EARTH AND PLANETARY SCIENCE LETTERS (2022)

Article Multidisciplinary Sciences

Slab control on the mega-sized North Pacific ultra-low velocity zone

Jiewen Li et al.

Summary: A mega-sized ULVZ has been discovered at the northern edge of the Pacific LLVP, almost double the size of a previously imaged ULVZ in the region, with half of the shear velocity reduction. It is formed by stable mantle flow converging at the LLVP edge driven by slab-debris in the lower mantle.

NATURE COMMUNICATIONS (2022)

Article Geosciences, Multidisciplinary

Influence of composition-dependent thermal conductivity on the long-term evolution of primordial reservoirs in Earth's lower mantle

Yang Li et al.

Summary: The composition-dependent thermal conductivity of primordial dense material has a secondary role in the long-term evolution of Earth's mantle, but if the material is enriched in heat-producing elements, it slightly affects the height and coverage of these reservoirs.

EARTH PLANETS AND SPACE (2022)

Article Multidisciplinary Sciences

Primitive noble gases sampled from ocean island basalts cannot be from the Earth's core

Yunguo Li et al.

Summary: Ab initio calculations were performed to determine the partitioning of noble gases between liquid iron and silicate melt under core forming conditions. The results showed significant differences in the partition coefficients of helium and neon, indicating that the core could contain substantial amounts of helium but not neon. Therefore, the core is not the source of noble gases in ocean island basalts.

NATURE COMMUNICATIONS (2022)

Article Geosciences, Multidisciplinary

Effects of thermal, compositional and rheological properties on the long-term evolution of large thermochemical piles of primordial material in the deep mantle

Min Huang et al.

Summary: Seismic tomography observations reveal the existence of two large low shear velocity provinces beneath Africa and the Pacific, which are suggested to be thermochemical piles of primordial material in the lower mantle. The evolution of these provinces is of great importance to our understanding of mantle dynamics.

SCIENCE CHINA-EARTH SCIENCES (2022)

Review Physics, Applied

Thermal conductivity of materials under pressure

Yan Zhou et al.

Summary: The measurement of thermal conductivity and understanding of thermal transport mechanisms under high pressure are challenging but important. Breakthroughs in high-pressure experimental techniques have enabled in situ measurements of thermal conductivity and provided insights into thermal transport mechanisms. This Review discusses recent progress in characterization techniques, determination of thermal conductivity, and the applications of high-pressure experiments.

NATURE REVIEWS PHYSICS (2022)

Article Geochemistry & Geophysics

Anomalous 182W in high 3He/4He ocean island basalts: Fingerprints of Earth's core?

A. Mundl-Petermeier et al.

GEOCHIMICA ET COSMOCHIMICA ACTA (2020)

Article Geochemistry & Geophysics

Effects of Heat-Producing Elements on the Stability of Deep Mantle Thermochemical Piles

Robert I. Citron et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2020)

Review Geosciences, Multidisciplinary

A coupled core-mantle evolution: review and future prospects

Takashi Nakagawa

PROGRESS IN EARTH AND PLANETARY SCIENCE (2020)

Article Geochemistry & Geophysics

Lowermost mantle thermal conductivity constrained from experimental data and tomographic models

Frederic Deschamps et al.

GEOPHYSICAL JOURNAL INTERNATIONAL (2019)

Article Multidisciplinary Sciences

Effects of iron on the lattice thermal conductivity of Earth's deep mantle and implications for mantle dynamics

Wen-Pin Hsieh et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2018)

Article Multidisciplinary Sciences

Tidal tomography constrains Earth's deep-mantle buoyancy

Harriet C. P. Lau et al.

NATURE (2017)

Article Geosciences, Multidisciplinary

Persistence of strong silica-enriched domains in the Earth's lower mantle

Maxim D. Ballmer et al.

NATURE GEOSCIENCE (2017)

Article Geochemistry & Geophysics

Reduced lattice thermal conductivity of Fe-bearing bridgmanite in Earth's deep mantle

Wen-Pin Hsieh et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2017)

Article Multidisciplinary Sciences

Shear deformation of bridgmanite and magnesiowustite aggregates at lower mantle conditions

Jennifer Girard et al.

SCIENCE (2016)

Review Geosciences, Multidisciplinary

Continent-sized anomalous zones with low seismic velocity at the base of Earth's mantle

Edward J. Garnero et al.

NATURE GEOSCIENCE (2016)

Article Geochemistry & Geophysics

Iron-spin transition controls structure and stability of LLSVPs in the lower mantle

Chuan Huang et al.

EARTH AND PLANETARY SCIENCE LETTERS (2015)

Article Geochemistry & Geophysics

Variation of thermal conductivity and heat flux at the Earth's core mantle boundary

Michael W. Ammann et al.

EARTH AND PLANETARY SCIENCE LETTERS (2014)

Article Geochemistry & Geophysics

Mantle dynamics with pressure- and temperature-dependent thermal expansivity and conductivity

Nicola Tosi et al.

PHYSICS OF THE EARTH AND PLANETARY INTERIORS (2013)

Article Geochemistry & Geophysics

The high conductivity of iron and thermal evolution of the Earth's core

Hitoshi Gomi et al.

PHYSICS OF THE EARTH AND PLANETARY INTERIORS (2013)

Article Geochemistry & Geophysics

Lattice thermal conductivity of MgSiO3 perovskite and post-perovskite at the core-mantle boundary

Kenji Ohta et al.

EARTH AND PLANETARY SCIENCE LETTERS (2012)

Article Geochemistry & Geophysics

Seismic and mineralogical structures of the lower mantle from probabilistic tomography

I. Mosca et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2012)

Review Geosciences, Multidisciplinary

Possible links between long-term geomagnetic variations and whole-mantle convection processes

A. J. Biggin et al.

NATURE GEOSCIENCE (2012)

Article Geosciences, Multidisciplinary

A deep mantle origin for the primitive signature of ocean island basalt

Frederic Deschamps et al.

NATURE GEOSCIENCE (2011)

Article Multidisciplinary Sciences

Upside-down differentiation and generation of a 'primordial' lower mantle

Cin-Ty A. Lee et al.

NATURE (2010)

Article Geochemistry & Geophysics

Controls on plume heat flux and plume excess temperature

Wei Leng et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2008)

Review Geosciences, Multidisciplinary

Core-mantle boundary heat flow

Thorne Lay et al.

NATURE GEOSCIENCE (2008)

Article Geochemistry & Geophysics

Modelling compressible mantle convection with large viscosity contrasts in a three-dimensional spherical shell using the yin-yang grid

Paul J. Tackley

PHYSICS OF THE EARTH AND PLANETARY INTERIORS (2008)

Article Multidisciplinary Sciences

A crystallizing dense magma ocean at the base of the Earth's mantle

S. Labrosse et al.

NATURE (2007)

Article Multidisciplinary Sciences

Reduced radiative conductivity of low-spin (Mg,Fe)O in the lower mantle

Alexander F. Goncharov et al.

SCIENCE (2006)

Article Geochemistry & Geophysics

Thermochemical structures within a spherical mantle: Superplumes or piles?

AK McNamara et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2004)

Article Multidisciplinary Sciences

Probabilistic tomography maps chemical heterogeneities throughout the lower mantle

J Trampert et al.

SCIENCE (2004)

Article Geochemistry & Geophysics

Testing the tracer ratio method for modeling active compositional fields in mantle convection simulations

PJ Tackley et al.

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS (2003)

Article Geochemistry & Geophysics

Small-scale ultralow-velocity zone structure imaged by ScP -: art. no. 2056

S Rost et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2003)

Article Multidisciplinary Sciences

Sharp sides to the African superplume

SD Ni et al.

SCIENCE (2002)

Article Geochemistry & Geophysics

Hotspots, mantle plumes and core heat loss

S Labrosse

EARTH AND PLANETARY SCIENCE LETTERS (2002)

Article Geochemistry & Geophysics

Role of temperature-dependent viscosity and surface plates in spherical shell models of mantle convection

SJ Zhong et al.

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2000)