Open AccessCompressional Velocity Distribution Beneath Scandinavia and Western Russia
Author(s) -
Massé Robert P.,
Alexander Shelton S.
Publication year - 1974
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1974.tb05475.x
Subject(s) - geology , shield , seismology , mantle (geology) , seismic velocity , classification of discontinuities , baltic shield , geodesy , geophysics , tectonics , paleontology , mathematical analysis , mathematics
Summary From analysis of a seismic profile across Southern Norway, it was determined that the crustal P velocity distribution of Norway is very nearly identical to the Canadian Shield crustal P velocity distribution. The apparent surface velocities determined are 6.23±0.05 kms −1 for P g , 7.17±0.05kms −1 for P *, and 8.13 ± 0.05 kms −1 for P n . An upper mantle seismic profile for Fennoscandia was constructed from Russian explosion recordings made at NORSAR. The upper mantle P velocity distribution beneath Scandinavia and Western Russia was determined from this profile to be the same as that beneath the Canadian Shield, with discontinuities at depths of approximately 74, 107, 328, 431 and 710 km, and a gradual increase in velocity in the depth range 590 to 710 km. Apparent surface velocities for upper mantle refractions are 8.48, 8.60, 9.27, 10.38, and 12.8 km s −1 with an uncertainty of ±0.05kms −1 .