Evolución del estado de esfuerzos durante la tectogénesis alpina en un sector del borde N de la Cordillera Ibérica (Alcaine, Teruel)

Abstract

Through brittle microstructure population analysis. the stress regime sequence in Alcaine's area during alpine tectogenesis bas been inferred. Dynamic study of fault populations allows us to distinguish stress tensors; chronological relationships of stylolitic joints and superposed striation within fault planes lead to establish its temporal sequence: (1) compression 100-110; (2) compression between N and ENE; (3) compression 140- 150; (4) distension with σ₃ axis 050-070. The three compressive stages have worked in a wrench regime (vertical σ₂); the transition between the third and distensive stages has been done by a σ₁-σ₂ axis interchange, without a break in tectonic activity.