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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Evidence for terrane boundaries and suture zones across Southern Mongolia detected with a 2-dimensional magnetotelluric transect

Fig. 3

Phase tensor and geo-electric strike analysis. a Phase tensor ellipses for all periods and all sites plotted along the profile and coloured with their skew values. The phase tensors indicate 1-D geo-electric structure when circular in shape and 2-D or 3-D structure when elliptical. Low skew values (ψ < 3°; blue colour) indicate relatively 1-D or 2-D data. High skew values (ψ > 6°; yellow to red colours) indicate significant distortion or 3-D effects. Dashed grey lines indicate separate tectonic zones. b A histogram of skew values illustrates that the majority of data points have skew < 2° and most are < 5°. c Rose diagram (circular histogram) of the geo-electric strike direction along the profile for 1–4096 s. The preferred direction is estimated to be N104° E. Note a 90° ambiguity exists (blue and red colours)

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