Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots

Anna M. Courtier; Matthew G. Jackson; Jesse F. Lawrence; Zhengrong Wang; Cin Ty Aeolus Lee; Ralf Halama; Jessica M. Warren; Rhea Workman; Wenbo Xu; Marc M. Hirschmann; Angela M. Larson; Stan R. Hart; Carolina Lithgow-Bertelloni; Lars Stixrude; Wang Ping Chen

doi:10.1016/j.epsl.2007.10.003

Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots

Anna M. Courtier, Matthew G. Jackson, Jesse F. Lawrence, Zhengrong Wang, Cin Ty Aeolus Lee, Ralf Halama, Jessica M. Warren, Rhea Workman, Wenbo Xu, Marc M. Hirschmann, Angela M. Larson, Stan R. Hart, Carolina Lithgow-Bertelloni, Lars Stixrude, Wang Ping Chen

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article

72 Scopus citations

Abstract

A fundamental question regarding the dynamics of mantle convection is whether some intraplate volcanic centers, known as "hotspots," are the surface manifestations of hot, narrow, thermally driven upwellings, or plumes, rising from the lower mantle. Shown here is a global negative correlation between the thickness of the mantle transition zone (near 410-660 km depth) and petrologically determined potential temperatures of mid-ocean ridge and hotspot magmas. Hotspot potential temperatures are systematically higher than those for mid-ocean ridges, and the transition zone thicknesses beneath these hotspots are thinner. Thus, the majority of oceanic intraplate magmatic centers are associated with deep-seated thermal anomalies, suggesting that such magmatism is probably associated with thermal plumes.

Original language	English (US)
Pages (from-to)	308-316
Number of pages	9
Journal	Earth and Planetary Science Letters
Volume	264
Issue number	1-2
DOIs	https://doi.org/10.1016/j.epsl.2007.10.003
State	Published - Dec 15 2007

Keywords

mantle plumes
mantle potential temperature
transition zone thickness

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10.1016/j.epsl.2007.10.003

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Courtier, A. M., Jackson, M. G., Lawrence, J. F., Wang, Z., Lee, C. T. A., Halama, R., Warren, J. M., Workman, R., Xu, W., Hirschmann, M. M., Larson, A. M., Hart, S. R., Lithgow-Bertelloni, C., Stixrude, L., & Chen, W. P. (2007). Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots. Earth and Planetary Science Letters, 264(1-2), 308-316. https://doi.org/10.1016/j.epsl.2007.10.003

Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots. / Courtier, Anna M.; Jackson, Matthew G.; Lawrence, Jesse F.; Wang, Zhengrong; Lee, Cin Ty Aeolus; Halama, Ralf; Warren, Jessica M.; Workman, Rhea; Xu, Wenbo; Hirschmann, Marc M.; Larson, Angela M.; Hart, Stan R.; Lithgow-Bertelloni, Carolina; Stixrude, Lars; Chen, Wang Ping.

In: Earth and Planetary Science Letters, Vol. 264, No. 1-2, 15.12.2007, p. 308-316.

Research output: Contribution to journal › Article

Courtier, AM, Jackson, MG, Lawrence, JF, Wang, Z, Lee, CTA, Halama, R, Warren, JM, Workman, R, Xu, W, Hirschmann, MM, Larson, AM, Hart, SR, Lithgow-Bertelloni, C, Stixrude, L & Chen, WP 2007, 'Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots', Earth and Planetary Science Letters, vol. 264, no. 1-2, pp. 308-316. https://doi.org/10.1016/j.epsl.2007.10.003

Courtier, Anna M. ; Jackson, Matthew G. ; Lawrence, Jesse F. ; Wang, Zhengrong ; Lee, Cin Ty Aeolus ; Halama, Ralf ; Warren, Jessica M. ; Workman, Rhea ; Xu, Wenbo ; Hirschmann, Marc M. ; Larson, Angela M. ; Hart, Stan R. ; Lithgow-Bertelloni, Carolina ; Stixrude, Lars ; Chen, Wang Ping. / Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots. In: Earth and Planetary Science Letters. 2007 ; Vol. 264, No. 1-2. pp. 308-316.

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abstract = "A fundamental question regarding the dynamics of mantle convection is whether some intraplate volcanic centers, known as {"}hotspots,{"} are the surface manifestations of hot, narrow, thermally driven upwellings, or plumes, rising from the lower mantle. Shown here is a global negative correlation between the thickness of the mantle transition zone (near 410-660 km depth) and petrologically determined potential temperatures of mid-ocean ridge and hotspot magmas. Hotspot potential temperatures are systematically higher than those for mid-ocean ridges, and the transition zone thicknesses beneath these hotspots are thinner. Thus, the majority of oceanic intraplate magmatic centers are associated with deep-seated thermal anomalies, suggesting that such magmatism is probably associated with thermal plumes.",

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AU - Wang, Zhengrong

AU - Lee, Cin Ty Aeolus

AU - Halama, Ralf

AU - Warren, Jessica M.

AU - Workman, Rhea

AU - Xu, Wenbo

AU - Hirschmann, Marc M.

AU - Larson, Angela M.

AU - Hart, Stan R.

AU - Lithgow-Bertelloni, Carolina

AU - Stixrude, Lars

AU - Chen, Wang Ping

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AB - A fundamental question regarding the dynamics of mantle convection is whether some intraplate volcanic centers, known as "hotspots," are the surface manifestations of hot, narrow, thermally driven upwellings, or plumes, rising from the lower mantle. Shown here is a global negative correlation between the thickness of the mantle transition zone (near 410-660 km depth) and petrologically determined potential temperatures of mid-ocean ridge and hotspot magmas. Hotspot potential temperatures are systematically higher than those for mid-ocean ridges, and the transition zone thicknesses beneath these hotspots are thinner. Thus, the majority of oceanic intraplate magmatic centers are associated with deep-seated thermal anomalies, suggesting that such magmatism is probably associated with thermal plumes.

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