Microseismicity derived fault-planes and their relationship to focal mechanism, stress inversion, and geologic data

Details Microseismicity derived fault-planes and their relationship to focal mechanism, stress inversion, and geologic data Microseismicity derived fault-planes and their relationship to focal mechanism, stress inversion, and geologic data

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2475u&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 22, p. 2475-2478

Mathematics

Logic

6

Geological Faults, Seismology, Stress Analysis, Geophysics, Principal Components Analysis, Stress Tensors

Scientific paper

General stress and faulting trends have been retrieved through the analysis of mining induced microseismic events (M less than 0) at two sites, related to an m(sub N) 2.6 rockburst, and an excavation at depth. A comparison of results obtained through principal component analysis (PCA) of seismicity, focal mechanism, and stress inversion, with in-situ measurements of stress and structural mapping data, show that: under stable stress conditions, the P, B, T, and stress inversion axes are consistent with in-situ measurements of stresses; stress inversion and PCA fault-planes lie within 10 to 20 deg of the most significant mapped features at the sites; and the PCA technique provides a robust approach for the determination of fault-planes.

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