Accession Number:

AD0729216

Title:

Crustal Structure in Southeastern Norway from Seismic Refraction Measurements,

Descriptive Note:

Corporate Author:

BERGEN UNIV (NORWAY) SEISMOLOGICAL OBSERVATORY

Personal Author(s):

Report Date:

1971-04-30

Pagination or Media Count:

74.0

Abstract:

A seismic refraction profile was carried out in Southeastern Norway in 1969 as a part of the Trans-Scandinavian Seismic Project. The explosions were also recorded at NORSAR. The data suggests a three layered crust with seismic velocities of 6.2, 6.55 and 7.1-7.3 kmsec. The upper mantle velocity of 8.20 kmsec agrees with values found previously in Scandinavia. The mean depths to the discontinuities within the crust were determined to be 17 and 26 km. The depth to the Moho discontinuity varies from about 32 km in the southern part of the profile to 41 km in the central part of the profile. Under NORSAR, the depth to Moho varied from 31.5 km in the central part to 38 km under the C-ring. A linear relationship can be observed between the depth of the mantle and the surface elevation and between the depth of the mantle and the Bouguer anomaly. The density contrast between the crust and mantle was determined to be 0.50 gcu cm. Author

Subject Categories:

  • Geology, Geochemistry and Mineralogy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE