Refine your search�ソスF     
Report No.
 - 

Magnetotelluric imaging of crustal magma storage beneath the Mesozoic crystalline mountains in a nonvolcanic region, northeast Japan

Umeda, Koji; Asamori, Koichi; Negi, Tateyuki*; Ogawa, Yasuo*

Mesozoic crystalline mountains (Iide Mountains) in a non-volcanic region of the Northeast Japan arc were imaged by wide-band magnetotelluric soundings. A two-dimensional model shows that an anomalous conductive body is clearly visible beneath the Iide Mountains. The conductor widens with increasing depth, and extends from the near-surface down to the base of the crust and perhaps into the upper mantle. Considering several independent indications of the possibility of crustal magma storage, such as a high-temperature regime, hot spring gases with high $$^{3}$$He/$$^{4}$$He ratios, thinning of the brittle seismogenic layer and anomalous low seismic velocity, it is reasonable to suppose that the conductor reflects partial melt and/or high-temperature aqueous fluids in the crust, related to renewed magmatism in the present-day subduction system.

Accesses

:

- Accesses

InCites™

:

Percentile:61.29

Category:Geochemistry & Geophysics

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.