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Resistivity structure of the Olympic Mountains and Puget Lowlands
Author(s) -
Aprea Claudia,
Unsworth Martyn,
Booker John
Publication year - 1998
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 - 10.1029/97gl03490
Subject(s) - geology , magnetotellurics , subduction , volcano , igneous rock , oceanography , sequence (biology) , seismology , electrical resistivity and conductivity , paleontology , tectonics , electrical engineering , engineering , genetics , biology
Magnetotellurics has been used to study of the geo‐electric structure of the Olympic Mountains and Puget Lowland. Data were collected along an west‐east line extending from the Pacific Ocean to the Cascade Mountains. The smoothest resistivity model consistent with the data suggests that subduction of the Olympic Mountains accretionary complex (Core rocks) has been prevented by a 30+km thick sequence of volcanic rocks. This may effectively couple the Juan de Fuca and North American Plates and may explain the concentration of crustal earthquakes beneath the Puget Lowland.