Structural data from the Azuaga Fault zone (SW Iberia)
Description
This dataset includes a collection of individual measurements of bedding, foliation, lineation, fold axes, fault planes and slickenlines in the hanging wall and footwall of the Azuaga Fault zone, located in SW Iberia (Badajoz, Spain). Data were collected in 2018 and 2019 near Azuaga village (Badajoz). Planar and linear data are divided into several groups, depending on the time of formation. Structures associated with the functioning of the Azuaga Fault include a main foliation (S3), main faults (MF), minor faults (mF), mineral lineation in S3 (L3), and slickenlines related to main faults (LMF) or minor faults (LmF). Planes related to deformation previous to the Azuaga Fault are referred to as S2 (main foliation in the allochthon to a Variscan suture zone) and Sx (main foliation in the autochthon to a Variscan suture zone). Bedding is referred to as S0. Plane measurements are given as dip direction and dip, while line measurements are given as plunge and trend. The structural dataset includes accompanying geological maps showing the location of individual measurements. These data can be used to calculate the geometry, properties of the tectonic flow and vorticity associated with the Azuaga Fault, which formed during the Variscan Orogeny in SW Iberia. These data are useful to evaluate the transpressional character of the Azuaga Fault by using an analytical model of triclinic transpression with oblique extrusion. The main parameters that control the flow pattern within the shear zone and that can be calculated with this dataset are: the transpression obliquity, the angle between the extrusion direction and the dip direction of the shear zone, and the relative amount of the simple shearing component with respect to the coaxial component (characterized by the kinematic vorticity number).
Files
Steps to reproduce
Orientation of structural data (planes and lines) was obtained with traditional analog compass, Freiberger model.