UPPER MANTLE STRUCTURE IN CANADA FROM SEISMIC OBSERVATIONS USING CHEMICAL EXPLOSIONS
- 1 October 1967
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Earth Sciences
- Vol. 4 (5) , 961-975
- https://doi.org/10.1139/e67-066
Abstract
Long-range seismic observations at the standard Canadian seismic stations, from chemical explosions in Hudson Bay and Lake Superior, are used to derive a P-wave velocity structure for the upper mantle. The coordinates of observed cusps are used to define the structural discontinuities. These discontinuities are at depths of 126 and 366 km, which agree closely with the depths of the S-wave velocity discontinuities deduced from surface-wave observations. The observations do not require a low velocity layer in the upper mantle.Keywords
This publication has 2 references indexed in Scilit:
- An interpretation of the first-arrival data of the Lake Superior Experiment by the time-term methodBulletin of the Seismological Society of America, 1966
- Travel-time curves for a low-velocity channel in the upper mantleBulletin of the Seismological Society of America, 1964