The Journal of the Geological Society of Japan
Online ISSN : 1349-9963
Print ISSN : 0016-7630
ISSN-L : 0016-7630
Review
Recent advancement and applications of stress tensor inversion techniques
Katsushi SatoMakoto OtsuboAtsushi Yamaji
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2017 Volume 123 Issue 6 Pages 391-402

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Abstract

Stress tensor inversion techniques are widely used in various fields of solid Earth sciences to elucidate (paleo) stress states in the Earth’s crust. In recent decades, these techniques have been developed and utilized for disaster prevention and assessment of nuclear power plant safety, as well as for scientific purposes. The data sources used in such studies include the orientations of mesoscale faults observed in outcrops, seismic focal mechanisms, dilatant fractures such as dykes and mineral veins, and mechanical twins in calcite grains. Inversion techniques for fault-slip data, including geological faults and seismic focal mechanisms, have been enhanced to detect multiple stress conditions from heterogeneous data and to examine spatiotemporal changes in stress. In addition, methods for analyzing dilatant fractures have been enhanced to determine stress regimes and stress ratios, with implications for fluid pressure levels. Recent refinements in calcite twinning analysis have aided estimates of differential stress magnitudes.

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© 2017 by The Geological Society of Japan
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