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In seismic exploration the dynamite source is generally considered to be a wavelet of-gate Geology & Geophysics 20171 AnswerWhich one of the following geophysical methods is most suitable for exploration of possible hydrocarbon-bearing sediments underlying the Deccan Traps? (-Gate geology and geophysics 2014)1 AnswerAssertion (a): An efficient marine seismic survey should use an implosive source. Reason (r): The performance of a marine seismic source is rated by high pulse-to-bubble ratio. (-Gate geology and geophysics 2014)1 AnswerIn a seismic section, paraconformity is marked by -gate Geology & Geophysics 2017 1 AnswerAfter migration, an anticline observed on an unmigrated seismic section becomes -gate Geology & Geophysics 20171 AnswerGardner’s formula relates the seismic P-wave velocity (VP) to -gate Geology & Geophysics 20171 AnswerAnalysis of data from a 3-component broadband seismological station yields seismic velocities, Vp = 7.0 km/s and Vs = 3.87 km/s for the lower crust. The resulting Poisson’s ratio of the lower crustal rocks (rounded to two decimal places) is -gate Geology & Geophysics 20171 AnswerHerringbone structure is generally formed in which of the following environments? GATE-Geology and Geophysics-Question-20121 Answer The frequency range (in Hz) that defines dead-band in magnetotelluric source signal is -gate Geology & Geophysics 2017 1 AnswerWhich one of the following transforms relates the real and imaginary components of harmonic electromagnetic (EM) field? (-Gate geology and geophysics 2014)1 AnswerFor earthquakes of magnitudes 6 and 7, the seismic wave amplitudes are A6 and A7 and the radiated energies are E6 and E7 respectively. Which one of the following is true? (-Gate geology and geophysics)1 Answer The main source of error in computing the orientation of planar features from drill cores is -gate Geology & Geophysics 2017 1 AnswerA confined sandy aquifer has a thickness of 10 m and transmissivity of 0.75 m2 per day. Its hydraulic conductivity is _____ m/day. (-Gate geology and geophysics 2014)1 Answer Choose the CORRECT statement regarding coal.-gate Geology & Geophysics 2017 1 AnswerMetal content (in metric tonnes) of an ore having specific gravity and assay values of 2.86 and 1.49 % respectively in a mining block 40 m long, 30 m wide and with an average thickness of 2.13 m is _______. (-Gate geology and geophysics 2014)1 AnswerAn 80 Hz seismic signal is sampled at a rate of 100 samples/s. What will be its aliased period (in seconds) in the sampled signal? (-Gate geology and geophysics 2014)1 AnswerThe S-wave velocity of a medium having a Poisson’s ratio and a P-wave velocity of 0.5 and 3 km/s respectively is _______km/s. (-Gate geology and geophysics 2014)1 AnswerWhich one of these is NOT a source of sufficient water supply but can transmit certain quantity of water on a regional scale due to leakage? GATE-Geology and Geophysics-Question-20121 AnswerIn seismic refraction surveys, the critical distance: (-Gate geology and geophysics 2014)2 Answer Which one of the following is NOT a set of polymorphous minerals? -gate Geology & Geophysics 20171 Answer