Analysis of the geomagnetic field and vertical movement near the intersection of Karjantau and Tavaksay faults in Uzbekistan

Abstract

Based on the previous researches of geophysics and geodesy, this paper analyzes the geomagnetic field and surface vertical movement near the intersection of Karjantau and Tavaksay faults by using the high-precision magnetic survey technique. Due to the high accuracy of the magnetic survey technique, the magnetic anomalies associated with geological structures and discontinuities are revealed. The measurement results of high-precision total station show the vertical movement difference of observation points over 36 years. When processing the obtained data, the points (Ferma and Visota) are identified as the most mobile points in the Karjantau fault zone. At the points (Skala and Visota) in the north of the Karjantau fault, the observed settlements are −1 mm and −59 mm, respectively. At the southern geodetic observation points (Noviy, Kladbishi and Ferma), they are uplifted by 32 mm, 11 mm and 54 mm, respectively. Based on these data, we can see that in the Tavaksay geodynamic polygon area, the variation of vertical movement values around the Ferma and Visota points is greater than other places. The reason for this phenomenon is that the above points are located in the areas close to the deep Karjantau fault zone.

Keywords

• Seismicity
• Fault
• Anomaly
• Vertical movement