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 15
... magnetic and electro- magnetic methods have been mostly employed for exploration for metallic minerals while the electrical resistivity and the refraction seismic methods ( supplemented by the reflection seismic method for basin studies ) ...
... magnetic and electro- magnetic methods have been mostly employed for exploration for metallic minerals while the electrical resistivity and the refraction seismic methods ( supplemented by the reflection seismic method for basin studies ) ...
Page 16
... magnetic ( VF ) iso- anomaly map ( M.R. Nair , 1963 , G.S.I report ) is presented in Plate - 3 . The magnetic anomalies are only of the order of a few tens of gammas . It is seen that the best of the drill holes has been placed in the ...
... magnetic ( VF ) iso- anomaly map ( M.R. Nair , 1963 , G.S.I report ) is presented in Plate - 3 . The magnetic anomalies are only of the order of a few tens of gammas . It is seen that the best of the drill holes has been placed in the ...
Page 42
... magnetic , which enabled their location by the magnetic method even under thick soil cover . The magnetic anomalies recorded in the above mentioned areas can be classified into two cate- gories ( 1 ) Isolated indications of limited ...
... magnetic , which enabled their location by the magnetic method even under thick soil cover . The magnetic anomalies recorded in the above mentioned areas can be classified into two cate- gories ( 1 ) Isolated indications of limited ...
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