Fábrica del cuarzo en tectonitas de alta temperatura (Manto de Ojén, Cordilleras Béticas)

J. M. Tubía; J. Cuevas

doi:10.3989/egeol.85413-4699

Fábrica del cuarzo en tectonitas de alta temperatura (Manto de Ojén, Cordilleras Béticas)

Authors

J. M. Tubía Departamento de Geomorfología y Geotectónica. Facultad de Ciencias, Universidad del País Vasco
J. Cuevas Departamento de Geomorfología y Geotectónica. Facultad de Ciencias, Universidad del País Vasco

DOI:

https://doi.org/10.3989/egeol.85413-4699

Keywords:

Plastic deformation, [c] axis patterns, subboundaries, intracrystalline slip, shear sense.

Abstract

The homogeneous migmatites of the Ojén nappe (Western Alpujarrides, Malaga) are intensely mylonitized simultaneously to the tectonic emplacement of the Ronda peridotites. This plastic deformation is produced at high temperatures (~750ºC), according to the mineralogy, microstructures and quartz [e] axis diagrams of mylonites. Several quartz [c] axis diagrams are like those type II crossed-girdles (Lister y Williams, 1979). The geometry of these patterns and the presence of basal subboundaries (┴ [c]) optically perceptibles in XZ section, suggest that the intracrystalline [c] slip acts together with the classic <a> slip. This hypothesis allows a kinematic analysis of those patterns in terms of simple shear in according to the regional shear sense.

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Published

1985-08-30

How to Cite

Tubía, J. M., & Cuevas, J. (1985). Fábrica del cuarzo en tectonitas de alta temperatura (Manto de Ojén, Cordilleras Béticas). Estudios Geológicos, 41(3-4), 149–156. https://doi.org/10.3989/egeol.85413-4699

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Issue

Vol. 41 No. 3-4 (1985)

Section

Articles

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