000			02508nam a2200325Ia 4500
003			OSt
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020			_a9780521339384 (pbk.) _c£ 74.99
040			_bENG _cIISER-BPR
041			_aENG
082			_a622.15 _bTEL _223rd
100			_aTelford, W. M. _93880
222			_aEath and Environmental Sciences
245		0	_aApplied geophysics
250			_a2nd ed.
260			_aCambridge: _bCUP, _cc1990.
300			_axx, 770p. : _bill. ; _c25cm
504			_aIncludes illustrations, figures, tables, references, appendices and index.
520			_aCompletely revised and updated, this new edition of the popular and highly regarded textbook, Applied Geophysics, describes the physical methods involved in exploration for hydrocarbons and minerals. These tools include gravity, magnetic, seismic, electrical, electromagnetic, and radioactivity studies. All aspects of these methods are described, including theoretical considerations, data acquisition, and data processing and interpretation, with the objective of locating concentrations of natural resources and defining their extent. In the past fourteen years or so since the writing of Applied Geophysics, there have been many changes in the field of exploration geophysics. The authors give full treatment to changes in this field, which include improved techniques for calculating gravity fields, the use of proton-precession and optically-pumped magnetometers, improved quality of seismic data, magnetotelluric as a practical exploration method, new electromagnetic exploration methods, the use of gamma-ray spectrometers in radioactive exploration, and improved well-logging techniques. The intent is to be practical, and thus many actual examples and problems are given. Moreover, wherever possible in this edition the authors adopt the use of Système Internationale (SI) units, which were not in standared use at the time of the first edition. The reader needs only a general background knowledge of geology, physics, and mathematics. Most of the math can be skipped by those interested only in the results. Advanced mathematical concepts are explained in the appendix.
650			_aEngineering and technology _93881
650			_aMining and applied operations _93882
650			_aApplied Geophysics _93883
700			_aGeldart, L. P. _93884
700			_aSheriff, R. E. _93885
942			_cBK _2ddc
942			_2ddc
947			_a7941.441
948			_a22
999			_c3325 _d3325