Crustal structure along the Great basin--Colorado plateau transition from seismic refraction studies

Journal Article · Mon Mar 10 04:00:00 EDT 1975 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JB080i008p01093· OSTI ID:7360006

Keller, G R; Smith, R B; Braile, L W

A seismic refraction profile was recorded along the southern Wasatch front in Utah to investigate crustal structure in the transition zone between the Great basin and Colorado plateau provinces. Interpretation of both refracted and reflected phases indicates a thin (approximately 25-km) crust, a low Pn velocity (approximately 7.5 km/s), and a crustal low-velocity layer in the approximate depth range of 8 to 15 km. Correlation with previous geophysical studies suggests that these features are present throughout the transition zone and that a mantle upwarp extending at least 50 km east of the boundary between these provinces (Wasatch front) is present. This upwarp may be of considerable tectonic significance, since it approximately coincides with a zone of high seismicity, the intermountain seismic belt.

• Research Organization: Univ. of Utah, Salt Lake City
• OSTI ID: 7360006
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 80:8; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580202* -- Geophysics-- Volcanology-- (1980-1989)
COLORADO
EARTH CRUST
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
NORTH AMERICA
ROCKY MOUNTAIN REGION
SEISMIC SURVEYS
TECTONICS
USA
UTAH