Accession Number : ADA302592

Title :   Seismic Studies of the Caspian Basin and Surrounding Regions.

Descriptive Note : Final rept. 15 Sep 93-14 Nov 95,

Corporate Author : CAMBRIDGE UNIV (UNITED KINGDOM)

Personal Author(s) : Priestley, Keith ; Mangino, Stephen

PDF Url : ADA302592

Report Date : 14 NOV 1995

Pagination or Media Count : 85

Abstract : In order to investigate the anomalous crust and upper mantle structure of the south Caspian Basin, we installed a network of six three component seismograph stations within the countries of Turkmenistan and Azerbaijan. Improved knowledge of the crust and upper mantle structure of the south Caspian Basin is important in a seismic verification context because of the anomalous effect it has on regional seismic waveforms. Our objective is to determine the velocity structure of this region using both body wave receiver function and surface wave modeling techniques. We present receiver function inversion results for four sites and fundamental mode Rayleigh wave observations for two great circle paths across this region. Also presented are results of a study of Russian deep seismic sounding data from a nuclear source recorded along a 2600km long profile in Siberia. This analysis supports the earlier observation that the 410km discontinunity beneath the Siberian Platform consists of a velocity increase over a 35km depth.

Descriptors :   *SEISMIC DATA, *EARTH MODELS, ANOMALIES, SURFACE WAVES, VERIFICATION, WAVEFORMS, PATHS, RECEIVERS, INVERSION, SEISMIC VELOCITY, BASINS(GEOGRAPHIC), SEISMOLOGY, STRUCTURAL GEOLOGY, RAYLEIGH WAVES, EARTH MANTLE, SEISMOLOGICAL STATIONS, SEISMOGRAPHS, CASPIAN SEA, AZERBAIJAN, TURKMENISTAN.

Subject Categories : Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE