METHOD OF SEARCHING FOR MINERAL RESOURCES ON THE SHELF OF SEAS COATED BY ICE Russian patent published in 2018 - IPC G01V1/28 G01V1/30 G01V1/38 

FIELD: geophysics.

SUBSTANCE: invention relates to the field of geophysics and can be used to monitor the state of the geological environment in the development of shelf and deep-sea mineral deposits, for the localization of large non-homogeneous formations such as various types of silted objects, volcanic structures in the seabed, etc. According to the claimed method, on the investigated territory an area arrangement is made with a predetermined pitch of the measuring points. Each measuring point consists of a seismic receiver installed in the thickness of the ice cover and a hydroacoustic vector receiver located in the thickness of the water below the seismic receiver. At each measuring point, seismic and hydroacoustic signals from noise sources are recorded for a certain time. After that, the surface seismic wave is extracted from the seismoacoustic signal by comparison of seismoacoustic and hydroacoustic signals, the seismoacoustic signal is filtered out from the hydroacoustic noise and ice cover noise. Then, the cross-correlation function of the filtered surface seismic waves for each pair of seismic receivers is calculated. Time of the surface seismic wave propagation is determined by the position of the maximum of the cross-correlation function. Building experimental maps of the velocity of a surface seismic wave for various frequencies ƒ, simulating the velocity maps of a surface seismic wave for the same frequencies ƒ by constructing mathematical models of the investigated geological medium with a different distribution of values of the elastic parameters in depth and comparing the model maps of the velocity of the surface seismic wave with the obtained experimental maps of the surface seismic wave velocity. Selecting a mathematical model of the investigated geological environment, for which model maps of the velocity of the surface seismic wave are identical to the obtained experimental maps of the velocity of the surface seismic wave. Then making a judgment about the availability of minerals by the value of the elastic parameters of the chosen mathematical model of the investigated geological environment.

EFFECT: technical result is increase in the accuracy and reliability of the search for minerals on the shelf of seas covered with ice.

1 cl, 3 dwg