Lithospheric architecture at the Rae-Hearne boundary revealed through magnetotelluric and seismic experiments

• Main Authors: Alan Jones David, David Snyder, Isa Asudeh, David Eaton
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2000
• Subjects: Chesterfield Inlet; Baker Lake
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.37.4481; http://nazca.cg.emr.ca/staff/jones/./papers/./2000/geocanada2000_wch.pdf

horizontal variations in physical parameters, and thereby to provide constraints on the evolution of Archean and Proterozoic lower crust and mantle. Site locations were chosen to obtain regional information, and also to image optimally any geometrical features associated with the putative Chesterfield Inlet segment of the STZ. Accordingly, sites 004 and 005 on either side of Baker Lake are only 35 km apart, compared to the average station spacing of 50 km. Lithospheric architecture of the Rae- Hearne boundary We present and discuss the results from the collocated teleseismic and MT experiments, demonstrating that the dominant geophysical crustal boundary in the region exists at Baker Lake, whereas the mantle boundary appears to be further to the south. In addition, there is identified an upper crustal boundary in electrical conductivity between sites 006 and 007, exactly at the location where a NE-extension of the southern segment of the STZ would cross and at the sou