Structural control of quartz veins in the Arroyo Cangre formation, Guamá river
Keywords:
veins, shear ratio, deformational period, Arroyo Cangre FormationAbstract
The Arroyo Cangre Formation located at La Faja Cangre, by the north of Pinar fault by the western Cuba, has a wide presence of quartz veins, mainly in meta-sandstone. The paper aims to characterize the veins mainly by measuring structures (veins, stratification planes and foliations). Eighty-four veins were characterized qualitatively and quantitatively by evaluating the internal structure; the relationship with stratification (longitudinal, oblique and transverse), mineralogy, thickness, type of deformation it relates to, geometric style, laying elements, box lithology, shear ratio, alteration halos and layout elements. The qualitative analysis of the veins based on their geometric-kinematic relationship and the different deformational periods that affected the area points to the fact that the longitudinal veins may be associated with the low tectonic transport of P2 as well as the transverse veins and some of the oblique ones. The other two families of oblique veins were formed at the beginning of P4 or along this, associated with extrusive orogeny and final configuration of the area.Downloads
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