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Effective magnetic susceptibility of the oceanic upper mantle derived from MAGSAT data
Author(s) -
ArkaniHamed Jafar,
Strangway David W.
Publication year - 1986
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl013i010p00999
Subject(s) - geology , lithosphere , subduction , geophysics , oceanic crust , trench , mantle (geology) , magnetic anomaly , mid ocean ridge , seismology , tectonics , chemistry , organic chemistry , layer (electronics)
Passive ocean‐continent boundaries have little magnetic signatures at MAGSAT altitude, ∼400 km, whereas subducting oceanic lithosphere has well defined magnetic anomalies over some of the subduction zones. Based on this observation, and a thermal evolution model of the oceanic lithosphere subducted along the Kuril‐Kamchatka trench, we determined an effective magnetic susceptibility of 0.0085 SI for the upper ∼35 km of the oceanic upper mantle.