Records of the Geological Survey of India, Volume 103The Survey, 1971 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 23
... frequency continuous wave E. M. systems generally employ a large transmitting loop of several wire - turns carrying a large amperage of current tuned to a generator frequency ranging between 150 and 4,000 c / sec . The varying magnetic ...
... frequency continuous wave E. M. systems generally employ a large transmitting loop of several wire - turns carrying a large amperage of current tuned to a generator frequency ranging between 150 and 4,000 c / sec . The varying magnetic ...
Page 27
... frequency spectrum . When the waves are recorded with different filters , the dominant frequencies are higher than the dominant frequencies of waves corresponding to clay strata having velocities close to the velocities in sands . In a ...
... frequency spectrum . When the waves are recorded with different filters , the dominant frequencies are higher than the dominant frequencies of waves corresponding to clay strata having velocities close to the velocities in sands . In a ...
Page 74
... frequency of ground vibration , as the ground selects or produces damped oscillatary vibra- tions at its resonance frequency in response to the impact . Mechanical vibration produced by a number of heavy machines were also recorded to ...
... frequency of ground vibration , as the ground selects or produces damped oscillatary vibra- tions at its resonance frequency in response to the impact . Mechanical vibration produced by a number of heavy machines were also recorded to ...
Contents
OF | 1 |
Geophysical Problems and Methods by L | 14 |
Mining Geophysics by P C Paul Y R Bhanu | 31 |
Copyright | |
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airborne alluvium anomaly zones Archaean basin Bihar borehole buried channels Cambay causative body chalcopyrite chromite clay coal seams conductive zones conductor corroborated curves Deccan traps delineated deposits depth Dhauj and Kot district electrical logging electrical resistivity fault field formations frequency G. S. I. report geological mapping Geological Survey Geophysical investigations geophysical logging geophysical methods geophysical surveys gneisses Gondwana graphite gravity groundwater groundwater exploration high resistive horizons in-phase indicated Indo-Gangetic plains Induced Polarisation Kailasam layers limestone locating log trace magnetic anomalies magnetic method magnetic surveys magnetometers mineralised zones minerals Mining Geophysics Nair negative S. P. ohm-m overburden phyllites Pradesh problem profiles quartzites radioactivity Rajasthan refraction seismic resistivity method resistivity values S. P. anomalies sandstones schists sedimentary sediments seismic method seismic refraction self-potential anomalies shales structural studies Subathu subsurface sulphide surface Survey of India surveys were carried terrace deposits Test drilling thickness tion velocity