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Electromagnetic induction information from differences at aeromagnetic crossover points

Hitchman, A; Lilley, Frederick (Ted); Milligan, P

Description

This paper describes an investigation of the use of aeromagnetic crossover misfits as a source of geological information. The misfits occur when, at a crossover point of an aeromagnetic survey, the separate measurements of the Earth's magnetic field are not the same. Misfits are mainly the result of time-dependent field changes and, in this paper, are analysed as indicators of electromagnetic induction in the Earth, and thus of electrical conductivity structure. The method derives estimates of...[Show more]

dc.contributor.authorHitchman, A
dc.contributor.authorLilley, Frederick (Ted)
dc.contributor.authorMilligan, P
dc.date.accessioned2015-12-13T23:22:24Z
dc.date.available2015-12-13T23:22:24Z
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/1885/91433
dc.description.abstractThis paper describes an investigation of the use of aeromagnetic crossover misfits as a source of geological information. The misfits occur when, at a crossover point of an aeromagnetic survey, the separate measurements of the Earth's magnetic field are not the same. Misfits are mainly the result of time-dependent field changes and, in this paper, are analysed as indicators of electromagnetic induction in the Earth, and thus of electrical conductivity structure. The method derives estimates of a magnetic diurnal variation function both for cells within the surveyed area and for a reference base station. Normalizing the former by the latter gives extra information from the aeromagnetic data. A case history from Australia is presented of the method applied to an aeromagnetic survey conducted in a region containing a known electrical conductivity structure. The presence of the conductivity anomaly is evident in the aeromagnetic misfit results.
dc.publisherBlackwell Publishing Ltd
dc.sourceGeophysical Journal International
dc.subjectKeywords: aeromagnetic survey; data processing; electromagnetic field Aeromagnetic crossover misfits; Electrical conductivity; Electromagnetic induction; Geomagnetism; Total magnetic field
dc.titleElectromagnetic induction information from differences at aeromagnetic crossover points
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume145
dc.date.issued2001
local.identifier.absfor020107 - Mesospheric, Ionospheric and Magnetospheric Physics
local.identifier.ariespublicationMigratedxPub22183
local.type.statusPublished Version
local.contributor.affiliationHitchman, A, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLilley, Frederick (Ted), College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMilligan, P, Geoscience Australia
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage277
local.bibliographicCitation.lastpage290
dc.date.updated2015-12-12T09:10:53Z
local.identifier.scopusID2-s2.0-0035068252
CollectionsANU Research Publications

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