Use of image analysis in the measurement of finite strain by the normalized Fry method: geological implications for the "Zone Houillere', (Brianconnais Zone, French Alps)

L. Ailleres, M. Champenois, J. Macaudiere, J. M. Bertrand

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16 Citations (Scopus)

Abstract

Image analysis techniques are used to quantify finite strain in microconglomerates from the "Zone Houillere' (Brianconnais Zone, French Alps) using the normalized Fry method. Two different techniques have been developed to extract the necessary parameters from quartz grains: the first uses an interactive videographic image analyser linked to a digitizer, and the second uses a semi-automatic image analyser algorithm working on numeric images. Semi-automated image analysis is employed to compute the characteristics of the finite strain ellipse as defined by the normalized Fry method. This has been tested on natural and simulated fabrics and gives accurate results. Finally, these techniques have been applied to samples from the French Alps, in an attempt to correlate the regional pattern of finite strain with deep seismic reflectors. -from Authors

Original languageEnglish
Pages (from-to)179-187
Number of pages9
JournalMineralogical Magazine
Volume59
Issue number2
Publication statusPublished - 1 Jan 1995
Externally publishedYes

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