Cloritas dioctaédricas asociadas a piritas en metapelitas de la Sierra de los Cameros

M. P. Mata; A. C. Prieto; F. Rull; J. M. Alia; F. López-Aguayo

doi:10.3989/egeol.91473-4413

Cloritas dioctaédricas asociadas a piritas en metapelitas de la Sierra de los Cameros

Authors

M. P. Mata Departamento de Ciencias de la Tierra. Cristalografía y Mineralogía. Universidad de Zaragoza
A. C. Prieto Departamento de Física Matemática Condensada, Cristalografía y Mineralogía. Universidad de Valladolid
F. Rull Departamento de Física Matemática Condensada, Cristalografía y Mineralogía. Universidad de Valladolid
J. M. Alia Laboratorio de Edafología y Mineralogía. Universidad de Castilla-La Mancha
F. López-Aguayo Departamento de Estructura y propiedades de los materiales. Facultad de Ciencias del Mar. Universidad de Cádiz

DOI:

https://doi.org/10.3989/egeol.91473-4413

Keywords:

Alum Chlorite, Iberian Range, Drx, fr

Abstract

A mineralogical and dynamic-vibrational characterization of a dioctahedral chlorite associated with the Navajún pyrite in the Wealdian of Sierra de Los Cameros (La Rioja), was carried out. The chemical analysis by A.A. and XRF combined with those of punctual character (EDX) allow us to establish the following mean structural formula:

(Si_3,32 Al_0,68) (Al_3,78 Fe³⁺_0,04Mg,_0,03Ca_0,02 K_0,03 Na_0,03 Li_1,04) O₁₀ (OH)₈

from XRD analysis the la-2 polytype was deduced as the most probable one. The most remarkable characteristics of the IR and Raman spectra, compared with those of the dioctahedral chlorites, correspond to the shift of the absorption band in rhe 1.000 cm^-1 region and its greater complexity, both related with the Al content.

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Published

1991-08-30

How to Cite

Mata, M. P., Prieto, A. C., Rull, F., Alia, J. M., & López-Aguayo, F. (1991). Cloritas dioctaédricas asociadas a piritas en metapelitas de la Sierra de los Cameros. Estudios Geológicos, 47(3-4), 129–135. https://doi.org/10.3989/egeol.91473-4413

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Issue

Vol. 47 No. 3-4 (1991)

Section

Articles

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