Question

om - T rum Partai P Права Б AAA A PA-Ease. c or Mabe AaBbc (15) 8. A forward seismic refraction profile was shot in an area known to have horizontal beds. The scale of the experiment was quite large. The profile has a total length of 5 km and the geophone spacing is 200 m (0.2 km). The records were picked and the Ist arrival times are given below: Geor, Dist. from source Time 0.0 km 0.2 0.005 0.13 0.4 0.27 0.6 0.40 0.53 0.8 1.0 0.67 hele torach O Lee

Can you help me solve this geophysics problem? thank you

Answer 1

0-2 0-6 0.13 slabe Scale arat Stationers. 15 Koha 13 Phone 22416833, 2257-1296 Globe Graph Paper - M.M. Division told X-1

Lounge ETTERATUR Soluhon from the velocity of first layer v = 0.675 km/s velocity of second layer V2 = 3.33 km/s velocity of third layer 3 = 5.88 Km/s Intercept times Ti = 0.4 sec. and T2 = 0.78 sec. Thickness of Corresponding layers. Ti = 22, Cos 013 where 0.3= sint ( 2 ) = sin! ( 0.615 ) = 6.310 z = TV 2 Cos (6.310) 0.4 X 0.675 2x o.gg Z2 = T2 V2 Ozz-sint ( 22 ) 2 Cos (023) V 5.88 z = - 136 m. similarly, Now = 0.78 X 3.33 2x Z2 = 156 m = 34.47° There fore Thickness of first layer 2, 2 1360 and thickness of second layer 2 = 156 m.

Moolel sand (day) 136m Vi = 0.675 km/s 156m. V2 = 3.33 km/s limestone Uz = 5.88 km/s. Cambrian Quartzite nation pu. It was a 3-layesed model. Conclusion &