Journal of Cave and Karst Studies - ISSN 1090-6924
Volume 66 Number 2: August 2004

A publication of the National Speleological Society

Application of resistivity and magnetometry geophysical techniques for near-surface investigations in karstic terranes in Ireland
P.J. Gibson, P. Lyle, and D.M. George

Abstract

Extensive glacial surficial deposits in Ireland prevent the identification of many karst features. Surface magnetic and resistivity geophysical measurements have been used to identify unknown karstic features. Two dimensional resistivity imaging has located an unknown 210 meter long, 70 meter wide and 25 meter deep collapse feature in eastern Ireland beneath the surficial sediments. A resistivity survey over the Cloyne cave system in County Cork has identified the position of an unknown cave. A magnetic investigation of an infilled paleokarst collapse structure produced a 40 nanoTesla anomaly and illustrates that the technique can be employed in Ireland to locate unknown ones.

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