SEISMOLOGICAL-GEOPHYSICAL RESEARCH CONDUCTED IN DASHKESAN SKARN IRON ORE GROUP BED AND ASSESSMENT OF THE RISK OF LANDSLIDE THAT MAY OCCUR IN THE AREA
Keywords:
SME-seismomagnetic effect, nT- nanotesla, mechanism of earthquake source, geodynamic mode, geomagnetic field stress,, ml-magnitude, gravity force,, gravimetric field stress, local anomaly, engineering-seismic explorationAbstract
1. In the article, it is noted that the value of the average transverse wave speed parameter varies between 400-515 m/s in the seismic profiles developed in the waste and landslide areas of Dashkasan skarn-iron ore group beds up to a depth of 30 m. In the left wing of the resulting landslide, a geological disturbance was determined in the direction of the fault-falling layer. A layer with a low transverse wave speed (350 441 m/s) is observed in the landslide area in seismic profiles No. 4 and 5 at a depth of 30-44, 30-47 m, respectively. This layer is assumed to be a clay layer. Inside the clay layer, a lens with a value of transverse wave speed varying between 263-351 m/s is observed. It is assumed that this lens has a layer of watery clay and the sliding plane corresponds to this layer.
2. In the direction of Mollahasanli village, a layer with low transverse wave speed (305-425 m/s) is observed at a depth of 30-45 m, and a lens with low wave speed is not observed inside this layer. From this point of view, the current condition of the retaining dam is considered stable compared to the landslide area.
3. In the waste and landslide area of Dashkasan skarn - iron ore group beds, the geodynamic regime was evaluated, the tension dynamics of the gravity and geomagnetic field were studied, and tectonic fault zones were found. These areas are assumed to be prone to landslides.
4. In the area of the new landfill, the observed gravity and geomagnetic stress are at background levels. For this reason, the new dump site is more durable and stable from the geological point of view than the previous (slid on 03.09.22) dump site.
