FN Archimer Export Format
PT J
TI Electromagnetic evidence for volatile-rich upwelling beneath the society hotspot, French Polynesia
BT 
AF TADA, Noriko
   TARITS, Pascal
   BABA, Kiyoshi
   UTADA, Hisashi
   KASAYA, Takafumi
   SUETSUGU, Daisuke
AS 1:1;2:2;3:3;4:3;5:1;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa, Japan.
   Inst Univ Europeen Mer, UMR Domaines Ocean, Plouzane, France.
   Univ Tokyo, Earthquake Res Inst, Tokyo, Japan.
C2 JAMSTEC, JAPAN
   UBO, FRANCE
   UNIV TOKYO, JAPAN
UM LGO
IF 4.253
TC 12
UR https://archimer.ifremer.fr/doc/00638/75054/75611.pdf
   https://archimer.ifremer.fr/doc/00638/75054/75612.pdf
LA English
DT Article
DE ;hotspot;marine magnetotellurics;three-dimensional inversion;volatiles;partial melt
AB We have conducted a seafloor magnetotelluric survey that images, for the first time, three-dimensional electrical conductivity structure in the upper mantle beneath the Society hotspot. A striking feature in our model is a high-conductivity anomaly a few hundred kilometers in diameter, which is continuous from the lowest part of the upper mantle to a depth of approximately 50km below sea level. Using theoretical and experimental results from mineral physics, we interpret the high-conductivity anomaly as evidence of the melt fraction up to 2.2vol.%, which is robust regardless of assumed temperature, and the existence of carbonated silicate melt beneath the hotspot. Our results suggest that the Society hotspot is a pathway for ascending volatiles from the deeper part of the upper mantle to the surface. 
PY 2016
PD DEC
SO Geophysical Research Letters
SN 0094-8276
PU Amer Geophysical Union
VL 43
IS 23
UT 000392515000043
BP 12021
EP 12026
DI 10.1002/2016GL071331
ID 75054
ER

EF