Application of 2-D travel-time inversion of seismic refraction data to the mid-continent rift beneath Lake Superior

Details Application of 2-D travel-time inversion of seismic refraction data to the mid-continent rift beneath Lake Superior Application of 2-D travel-time inversion of seismic refraction data to the mid-continent rift beneath Lake Superior

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..615l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 7, p. 615-618.

Mathematics

Logic

4

Earth Crust, Earth Movements, Geological Faults, Seismology, Mathematical Models, Parameterization, Refraction, Resolution, Seismograms, Velocity Measurement

Scientific paper

An inversion technique was applied to first arrival seismic refraction data collected during the 1986 Lake Superior experiment. This technique allows comparison of the inversion image with an independently derived forward model. The inversion method was expanded to allow variable grid spacing for bicubic spline parameterization of velocity. Grid spacing improved model delineation and data fit. The model was used to image a low velocity central graben, flanking half-grabens of the Midcontinent Rift, and regions bounding the central graben. The inversion model reproduced the primary features of the forward model, but the forward modeling interpretation gave finer details associated with the near surface expression of the two faults.

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