Inhomogeneous structure of magnetic layer of the Kuril Island Arc
https://doi.org/10.5800/GT-2020-11-3-0492
Abstract
An innovative technology of anomalous magnetic field inversion was applied to construct 2D models of the magnetic layer using three profiles crossing the southern, central and northern parts of the Kuril Island Arc. In the frontal area of the northern and southern parts, a zone of increased effective magnetization is clearly distinguished. In the central part of the island arc, increased magnetization is much less pronounced. Anomalous zones of positive effective magnetization have a deep part, the so-called "serpentinite wedge". The inhomogeneous lateral structure of the magnetic layer of the Kuril Island Arc suggests differences in the fluid regime and is reflected in the distribution of modern seismicity.
Keywords
subduction zone,
Kuril Island Arc,
frontal area,
magnetic layer,
serpentinite,
hydration,
seismicity,
anomalous magnetic field,
inverse problem
Supporting agencies: The study was carried out in accordance with the state assignment of the RF Ministry of Science and Higher Education (№ 0149-2019-0006) with partial financial support from the RFBR (№ 18-05-00316).
About the Authors
N. A. Palshin
Shirshov Institute of Oceanology, Russian Academy of Sciences
Russian Federation
Russian Federation
Nikolay A. Palshin.
36 Nahimovskiy Ave, Moscow 117997.
A. N. Ivanenko
Shirshov Institute of Oceanology, Russian Academy of Sciences
Russian Federation
Russian Federation
36 Nahimovskiy Ave, Moscow 117997.
D. A. Alekseev
Shirshov Institute of Oceanology, Russian Academy of Sciences; Moscow Institute of Physics and Technology; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Russian Federation
Russian Federation
36 Nahimovskiy Ave, Moscow 117997; 9 Institutskiy Ln, Moscow Reg, Dolgoprudny 141701; 10/1 Bolshaya Gruzinskaya St, Moscow 123242.
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Review
For citations:
Palshin N.A., Ivanenko A.N., Alekseev D.A. Inhomogeneous structure of magnetic layer of the Kuril Island Arc. Geodynamics & Tectonophysics. 2020;11(3):583-594. (In Russ.) https://doi.org/10.5800/GT-2020-11-3-0492
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