6. Time Domain Electromagnetic Prospecting Methods
1991; Society of Exploration Geophysicists; Linguagem: Inglês
10.1190/1.9781560802686.ch6
AutoresMisac N. Nabighian, James Macnae,
Tópico(s)Geological Modeling and Analysis
ResumoPreviousNext No AccessElectromagnetic Methods in Applied Geophysics: Volume 2, Application, Parts A and B6. Time Domain Electromagnetic Prospecting MethodsAuthors: Misac N. NabighianJames C. MacnaeMisac N. NabighianNewmont Exploration Limited, Denver, Colorado, USLamontagne Geophysics limited, Artarmon, New South Wales, AUSearch for more papers by this author and James C. MacnaeNewmont Exploration Limited, Denver, Colorado, USLamontagne Geophysics limited, Artarmon, New South Wales, AUSearch for more papers by this authorhttps://doi.org/10.1190/1.9781560802686.ch6 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract INTRODUCTION In the traditional frequency-domain electromagnetic (FEM) methods of exploration the ground is energized by passing an alternating current (ac) through an ungrounded loop situated usually on or above the surface of the earth. The primary field of the loop will induce eddy currents in all conductors present in the earth. The secondary electromagnetic (EM) fields due to these induced currents, together with the primary EM field, are recorded with a suitable receiver at various points in space. In general, the secondary EM field at the receiver, which contains all the information regarding the underground conductors, may be several orders of magnitude smaller than the primary field. Under these conditions the separation of the measured total EM field into its primary and secondary parts is difficult. 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No part of this publication may be reproduced or distributed in any form or by any means without written permission of the publisherPublisher:Society of Exploration Geophysicists HistoryPublished in print: 01 Jan 1991 CITATION INFORMATION Misac N. Nabighian and James C. Macnae, (1991), "6. Time Domain Electromagnetic Prospecting Methods," Investigations in Geophysics : 427-520. https://doi.org/10.1190/1.9781560802686.ch6 Plain-Language Summary PDF DownloadLoading ...
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