Premium
SEISMIC AND GRAVITY TWO‐DIMENSIONAL INHOMOGENEOUS MODEL OF THE EARTH'S CRUST (ON THE EXAMPLE OF CENTRAL KAZAKHSTAN) *
Author(s) -
OBLOGINA T.I.,
FEDYNSKY V.V.
Publication year - 1980
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1980.tb01244.x
Subject(s) - crust , geology , geophysics , seismology , structure of the earth , depth sounding , geodesy , oceanography
A bstract The interpretation of deep seismic sounding (DSS) data has been made on the basis of a two‐dimensional inhomogeneous model. The refracted first arrivals as well as reflected and diffracted waves on the seismic records have been utilized. The seismic section was modeled in the iso‐veolcity lines v (x, y) = const, taking into account the zones of diffraction associated with deep faults. Gravity observations have been used to construct a block model of the Earth's crust with vertical boundaries. It is suggested to define the base of the crust as the zone with velocities between 7.8 and 8.2 km/s. The reflecting boundaries of different length occurring in this zone can be conformal or unconformal with the iso‐velocity lines near the base of the crust. As an example of our approach to the interpretation of DSS data the folded‐blocky structure of the crust with horizontal inhomogeneities of velocity and density is shown in the Kzyl‐Orda‐Dzheskazgan profile in Central Kazakhstan.