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Geophysical correlation of Precambrian rocks of northern Britain

By
K. E. Rollin
K. E. Rollin
British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
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Published:
January 01, 1994

Abstract

Geophysical correlation is based on the direct or indirect sampling of physical properties of distinct rock units together with qualitative and quantitative interpretation of geophysical data to provide spatial models of these rock units. In addition, the identification of major structural discontinuities from geophysical data has to be integrated into an overall model, including deformation and lithological correlations.

Unequivocal lithological identification, and therefore correlation, on the basis of measured or inferred geophysical properties is not generally possible. Commonly the range of physical properties associated with a particular rock unit will overlap that of other unrelated units. A further problem is that measured surface properties need to be adjusted for the effects of temperature and pressure to infer geophysical parameters at depth. Nevertheless, some rock units do have a sufficiently distinctive string of physical properties to generate a particular geophysical signature so that integrated analysis of the potential field and seismic data can suggest some models of (Precambrian) basement distribution and indicate possible styles of deformation.

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Contents

Geological Society, London, Special Reports

A revised correlation of Pre-Cambrian rocks in the British Isles

W. Gibbons
W. Gibbons
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A. L. Harris
A. L. Harris
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Geological Society of London
Volume
22
ISBN electronic:
9781786202857
Publication date:
January 01, 1994

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