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Meteorización en una zona de contacto: granito-lamprofido

Weathering in granite and lamprophyre contact
Authors: Taboada, T. M.; Romero, R.; García, C.; Macías Vázquez, F.;

Meteorización en una zona de contacto: granito-lamprofido

Abstract

[Abstract] In this paper is developed a microstructural, mineralogical and geochemical study of the weathering process in a contact between a granitic rock and a lamprophyre. In the granitic rack the main weathering products are gibbsite, under strongly leaching conditions, and 1: 1 phyllosilicates when the drainage is lesser. In the lamprophyre the products are 1: 1 phyllosilicates, vermiculitic integrades and iron oxides; the abundance of this oxides permit the conservation of rock structure till advanced stages of weathering. The overall process is moniosiallitic (fermonosiallitic in the basic rock), although an allitic tendency can be appreciated during the initial stages of the granitic rock weathering. The abrasion pH is good index to asses the weathering degree of these rocks.

[Resumen] Se realiza el estudio microestructural, mineralógico y geoquímico del proceso de meteorización en una zona de contacto granito-lamprófido. En la roca granítica se observa gibbsita, en los medios muy lixiviados, y filosilicatos 1: 1 en los menos drenados. En ellamprófido los productos son filosilicatos 1: 1, integrados vermiculíticos y oxi-hidróxidos de hierro; la abundancia de estos óxidos permite la conservación de la estructura original hasta etapas muy avanzadas dé la meteorización. El proceso global es de tipo monosialítico (fermonosialítico en las rocas básicas) con una tendencia inicial alitizante en las rocas graníticas. El pH de abrasión constituye un buen índice del grado de meteorización de estas rocas.

Country
Spain
Related Organizations
Keywords

Granitos, Contacto, Meteorización, pH de abrasión, Abrasion pH, Lamprophyte, Contact, Wathering, Lamprófido, Granites

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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