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Quimismo de los principales componentes minerales de las rocas volcánicas paleozoicas del área de Atienza (Prov. de Guadalajara)

Authors: Aparicio, Alfredo; García Cacho, L.;

Quimismo de los principales componentes minerales de las rocas volcánicas paleozoicas del área de Atienza (Prov. de Guadalajara)

Abstract

[ES] El estudio del quimismo de los principales minerales constituyentes de las rocas andesíticas paleozoicas del área de Atienza y de sus enclaves metamórficos esquistosos, así como de los productos de reacción entre ambos, pone de manifiesto un proceso de asimilación parcial de los enclaves, que confirma el carácter xenolítico del granate en la roca volcánica y justifica el comienzo de cristalización de biotita en esta última. Se establecen igualmente una serie de consideraciones sobre las relaciones de contacto entre la roca volcánica y el encajante metamórfico, sobre las temperaturas de intrusión, las de comienzo de cristalización magmática y las de génesis de los esquistos, todo ello en relación con la última fase evolutiva del magmatismo calcoalcalino del Sistema Central y la profundidad de génesis de dicho magma.

[EN] The chemical data of principal mineral s (garnet, biotite, plagioclase, amphibol, etc.) from paleozoic andesitic rocks of Atienza (Guadalajara) and their metamoI1Phic inclusions (sohists) shows a partial contamination process, that confirm the xenolitic character of garnet and also determine the starting crystallization of biotite in the volcanic rocks. Different considerations are established concerning relationship between volcanic and metamorphic host rocks, and about intrusion, crystallization and regional metamorphism temperatures respectively. All these factors are related to the late evolution of Hercinian igneous events on the Spanish Sistema Central.

Al Dr. E. Ancochea, por la crítica revisión del manuscrito. A J. L. Casaseca y T. Ruiz, por los trabajos de mecanografía. J. Arroyo realizó la delineación y E. Molero las láminas delgadas. Los análisis de microsonda fueron realizados por J. de la Puente.

10 paginas, 11 figuras, 2 tables.

Peer reviewed

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Spain
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This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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