P. Schmoldt, PhD - MTNet - DIAS

7. Geology of the Iberian Peninsula
Fig. 7.4.: Subsurface model of the electric conductivity distribution beneath the Betic Cordillera by Pous et al. [1999] (upper panel);
see Figure 7.2 for location of the profile. Letters refer to major features of the model (see text for details), whereas black, dashed lines
denote the location of different geological regions (colour-coded in lower panel), inferred from structural and reflection seismic data.
Question marks indicate that the interface is solely deduced on the base of geometrical considerations. Dashed lines in the lower panel
denote the location of the electric conductivity model and acronyms EBD, UCR, MDL, and DDL refer to the main seismic reflectors.
inspected in more detail, their results are contrasted and used to understand the setting of
the Betic Cordillera.
Pous et al. [1999] combined results from their 2D MT profile inversion with findings
from geological and seismic studies (see references in Pous et al. [1999]) in order to aid
their interpretation (Fig. 7.4). The shallow subsurface distribution is derived from surface
structural data, whereas deeper features are constrained by seismic reflection profiles. The
interface DDL is geometrically inferred, proposed in order to explain the duplication of
the lower crust and a jump in the Moho. The interpretations for the features in their 2D MT
subsurface model given by Pous et al. [1999] are summarised in Table 7.1. As a result of
their observations, the authors provide two subsurface models that are in agreement with
their data and the other geophysical and geological studies (Fig. 7.5). The two models are
particularly different in terms of the Internal Betics Lower Crustal origin; the region may
138