TY - JOUR
T1 - Correlation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots
AU - Courtier, Anna M.
AU - Jackson, Matthew G.
AU - Lawrence, Jesse F.
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
PY - 2007/12/15
Y1 - 2007/12/15
N2 - 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.
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.
KW - mantle plumes
KW - mantle potential temperature
KW - transition zone thickness
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U2 - 10.1016/j.epsl.2007.10.003
DO - 10.1016/j.epsl.2007.10.003
M3 - Article
AN - SCOPUS:36048992487
VL - 264
SP - 308
EP - 316
JO - Earth and Planetary Sciences Letters
JF - Earth and Planetary Sciences Letters
SN - 0012-821X
IS - 1-2
ER -