TY - JOUR
T1 - A two-way interaction between the Hainan plume and the Manila subduction zone
AU - Mériaux, Catherine A.
AU - Duarte, João C.
AU - Schellart, Wouter P.
AU - Mériaux, Anne Sophie
PY - 2015/7/28
Y1 - 2015/7/28
N2 - The interaction between mantle plumes and subducting slabs is well accepted, but the influence of slabs on plumes has more often been portrayed than the reverse. Here we present three-dimensional upper mantle laboratory models in which a compositional plume rises underneath a subducting plate. Slab/plume buoyancy flux ratios ranged between 7 and 18. The models exhibit a two-way interaction. While the plume conduit increasingly tilts away from the trench as a result of slab rollback-induced toroidal mantle flow, the slab subduction rate decreases as a function of the amount of plume buoyancy opposing that of the slab, which gets subducted beneath the slab. We propose that our models apply to the Hainan/Manila system and explain the recently imaged tilt of the Hainan plume by the Manila slab-induced mantle return flow. The Hainan plume could lessen the Manila subduction rate from 8Ma into the future.
AB - The interaction between mantle plumes and subducting slabs is well accepted, but the influence of slabs on plumes has more often been portrayed than the reverse. Here we present three-dimensional upper mantle laboratory models in which a compositional plume rises underneath a subducting plate. Slab/plume buoyancy flux ratios ranged between 7 and 18. The models exhibit a two-way interaction. While the plume conduit increasingly tilts away from the trench as a result of slab rollback-induced toroidal mantle flow, the slab subduction rate decreases as a function of the amount of plume buoyancy opposing that of the slab, which gets subducted beneath the slab. We propose that our models apply to the Hainan/Manila system and explain the recently imaged tilt of the Hainan plume by the Manila slab-induced mantle return flow. The Hainan plume could lessen the Manila subduction rate from 8Ma into the future.
KW - analogue modeling
KW - mantle plumes
KW - subduction
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U2 - 10.1002/2015GL064313
DO - 10.1002/2015GL064313
M3 - Article
AN - SCOPUS:84938956311
VL - 42
SP - 5796
EP - 5802
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 14
ER -