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A geological reconnaissance survey is being carried out using remote sensing multispectral data. Which set of the two band data of the following is most appropriate for mapping limonite bearing zones? (-Gate geology and geophysics 2014)1 AnswerDiscuss the classification of surveying Dec 2011 Dec 2012 JuneJuly 20 131 AnswerThe data of which one of the following active electromagnetic techniques can be used to correct static shift effect in magnetotelluric apparent resistivity data? -gate Geology & Geophysics 2017 1 AnswerWhat is remote sensing? Write its application in civil engineering (Jan-2013) (Dec- 2013) ( July-2014)?1 AnswerDuring which of the following geological eras did birds and mammals first appear on the Earth? (-Gate geology and geophysics 2014)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 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 AnswerDrainage patterns observed in four areas are shown in black-and-white panchromatic images P, Q, R and S. Field work in these areas has indicated presence of the following lithology/geological unit. (-Gate geology and geophysics 2014)1 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 AnswerIn general, geophysical inverse problems dealing with real data obtained from field measurements are: (-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 AnswerThe following gamma ray (GR) log data are recorded in a borehole: GR log value against a formation = 30 API units, Maximum GR log value = 45 API units, Minimum GR log value = 20 API units. (-Gate geology and geophysics 2014)1 AnswerA collection of traces having a common mid-point is called a CMP gather. The number of traces in an n-fold survey in a CMP gather is: (-Gate geology and geophysics 2014)1 AnswerIn any given signal, removal of all periods shorter than Nyquist period is achieved by -gate Geology & Geophysics 20172 AnswerThe most sensitive instrument for magnetic survey is GATE-Geology and Geophysics-Question-20121 AnswerEparchean unconformity separates geological units of GATE-Geology and Geophysics-Question-20121 AnswerWhich one of the following can be best explored using electromagnetic method? GATE-Geology and Geophysics-Question-20121 AnswerA gaseous hydrocarbon-bearing zone can be best identified by a combined analysis of: (-Gate geology and geophysics 2014)1 AnswerThe correct chronological order (older to younger) of the following geological units is: (-Gate geology and geophysics)1 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 Answer