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Phases greater than 90° in MT data: Analysis using dimensionality tools

Lilley, F. E. M.; Weaver, J. T.


An example of magnetotelluric data is discussed which has distinctive phase values out of quadrant, and for which the Zxx element of the measured tensor is greater than the Zxy element in both real and quadrature parts. Mohr circle plots and principal value decompositions of the real and quadrature parts of the tensor clarify its understanding. An analysis of rotational invariants of the data suggests a case of galvanic distortion of a 2D structure. Results from phase tensor analysis are...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Journal of Applied Geophysics
DOI: 10.1016/j.jappgeo.2009.08.007


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