Mineralogía y génesis de las arcillas de las unidades del Campo de Gibraltar. IV. Unidad de Facinas

P. Rodríguez Jiménez; M. O. Ruiz Cruz

doi:10.3989/egeol.89453-4487

Mineralogía y génesis de las arcillas de las unidades del Campo de Gibraltar. IV. Unidad de Facinas

Authors

P. Rodríguez Jiménez Departamento de Química Inorgánica, Cristalografia y Mineralogía. Fac. de Ciencias. Univ. de Málaga
M. O. Ruiz Cruz Departamento de Química Inorgánica, Cristalografia y Mineralogía. Fac. de Ciencias. Univ. de Málaga

DOI:

https://doi.org/10.3989/egeol.89453-4487

Keywords:

Chlorite, authígenic minerals, Facinas Unit, Gibraltar

Abstract

The Facinas Unit consists of a clayed flysch facies with quartzite and sandstone centimeter layers. According to paleontological data, two beds are distinguished, one lower of Albian-Aptian age, and another, hígher, Upper Cretaceous-Paleocene in age. The mineralogy of the Facinas Unit is very monotonous through all the sequences studied, especially for the concerning to less than 2 fraction. This unít is characterized by an abundance of chlorites of different composition and genesis: Authigenic chlorites are mainly Fe-rich members, whereas chlorites of inherited origin are magnesian. On the other hand, this míneralogical study reveals a common origin and/or evolution for the two beds of the Facinas Unít.

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Published

1989-08-06

How to Cite

Rodríguez Jiménez, P., & Ruiz Cruz, M. O. (1989). Mineralogía y génesis de las arcillas de las unidades del Campo de Gibraltar. IV. Unidad de Facinas. Estudios Geológicos, 45(3-4), 141–153. https://doi.org/10.3989/egeol.89453-4487

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Issue

Vol. 45 No. 3-4 (1989)

Section

Articles

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