Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models

Details Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007geoji.170..737b&link_type=abstract

Geophysical Journal International, Volume 170, Issue 609, pp. 737-748.

Statistics

14

Electrical Resistivity, Geostatistics, Magnetotellurics, Seismic Structure, Seismic Velocity, Tomography

Scientific paper

Magnetotelluric and seismic methods provide complementary information about the resistivity and velocity structure of the subsurface on similar scales and resolutions. No global relation, however, exists between these parameters, and correlations are often valid for only a limited target area. Independently derived inverse models from these methods can be combined using a classification approach to map geologic structure. The method employed is based solely on the statistical correlation of physical properties in a joint parameter space and is independent of theoretical or empirical relations linking electrical and seismic parameters. Regions of high correlation (classes) between resistivity and velocity can in turn be mapped back and re-examined in depth section. The spatial distribution of these classes, and the boundaries between them, provide structural information not evident in the individual models. This method is applied to a 10 km long profile crossing the Dead Sea Transform in Jordan. Several prominent classes are identified with specific lithologies in accordance with local geology. An abrupt change in lithology across the fault, together with vertical uplift of the basement suggest the fault is sub-vertical within the upper crust.

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