P. Schmoldt, PhD - MTNet - DIAS

1. Introduction
synthetic model study encourages application of the novel approach to the real PICASSO
Phase I dataset.
Investigation of the Iberian Peninsula subsurface within the framework of the PICASSO
Phase I project is discussed in Part IV: Magnetotelluric investigation of the southern
Iberian subsurface – PICASSO Phase I. Therein, acquisition of the PICASSO Phase I
data is specified (Chapter 9), followed by a description of inversion procedures used to
determine the Tajo Basin crust and mantle structures, and a discussion of the inversion
results (Chapter 10). Processing of the dataset includes, among others, investigation of
geoelectric strike directions for the different regions along the profile as well as the change
of geoelectric strike direction with depth, which leads to the development of the novel
anisotropic inversion approach. Anisotropic 1D and 2D inversion that use the novel approach,
as well as isotropic 2D and 3D inversion is used to derive models of the complex
Iberian Subsurface. Results of 1D, 2D, and 3D approaches are compared with each other,
and results of previous geophysical studies in the region are used in the interpretation of
model features.
Part V: Summary, Appendix, and Bibliography comprises a summary of results for
the novel inversion approach and conclusions about the Iberian Peninsula subsurface,
together with suggestions for future work (Chapter 11). This summary is followed by the
Appendix containing auxiliary information that were moved to the end of this thesis, for
the sake of clarity in the main body (Chapter A). Sections in this Appendix comprise a
detailed study of the Iberian Peninsula evolution (Section A.1), specific aspects of MT
inversion related to this thesis work (Section A.2), and a detailed examination of results
from the synthetic model study (Section A.3), as well as a comparison of response curves
from the PICASSO Phase I stations and from the derived subsurface models. The list
of references referred to in this thesis is given at the end of this body of work (Chapter
Bibliography).
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