MT and reflection

an essential combination

Alan G. Jones*

*Corresponding author for this work

Research output: Contribution to journalArticle

125 Citations (Scopus)

Abstract

Summary. At many localities in the world there have been coincident comprehensive electromagnetic (EM) studies and seismic reflection profiles conducted. Unfortunately, over many more regions the seismic reflection images are interpreted without the constraints afforded by electrical conductivity information. This paper is an attempt to convince the reader that a collocated magnetotelluric (MT) study should, in almost every case, be made wherever a seismic reflection survey is undertaken. Examples are shown from six studies in which the EM results aided the geological/tectonic interpretations of the seismic sections. Also, difficulties with the MT technique are discussed, and the interpretations of conducting zones within the lower crust are examined. Finally, a generalised model is proposed for the continental crust that may account for both the reflectivity and conductivity of the zone at the top of the lower crust.

Original languageEnglish
Pages (from-to)7-18
Number of pages12
JournalGeophysical Journal of the Royal Astronomical Society
Volume89
Issue number1
DOIs
Publication statusPublished - 1987
Externally publishedYes

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