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Heavy mineral composition and geochemistry of the Weald facies from the Maestrat Basin (Spain): Provenance implications for Late Jurassic-Early Cretaceous rifting stage

Authors: Caja, Miguel Ángel; Salas, Ramón; Marfil Pérez, Rafaela; Lago San José, Marceliano;

Heavy mineral composition and geochemistry of the Weald facies from the Maestrat Basin (Spain): Provenance implications for Late Jurassic-Early Cretaceous rifting stage

Abstract

Las areniscas en facies Weald de la Cuenca del Maestrazgo fueron depositadas durante la etapa de rift Jurásico superior-Cretácico inferior. Una característica de las cuencas intracratónicas desarrolladas durante periodos de rifting es la presencia de varias potenciales áreas fuentes que pueden aportar sedimentos a la vez. Este hecho complica la interpretación de la procedencia usando los modelos clásicos a escala tectónica. En este trabajo, la geoquímica de roca total se relaciona con el análisis químico en minerales pesados y con el análisis modal para llegar a discriminar la procedencia de areniscas syn-rift. La composición modal y los análisis de roca total de las areniscas estudiadas indican una composición arcósicasubarcósica. Las areniscas de la Fm. Mora, en la base, presentan la mayor abundancia en minerales pesados y el contenido más bajo en feldespatos (menor contenido en Rb). Por el contrario, las areniscas de la Fm. Camarillas, en el techo, reflejan un incremento en Rb relacionado con un aporte mayoritario de feldespato-K. La composición química de las turmalinas analizadas sugiere una procedencia mixta, a partir de granitos (turmalinas ricas en Fe) y rocas metamórficas (turmalinas ricas en Mg) para todas las unidades estudiadas. Esta interpretación es consistente con la mayor abundancia de fragmentos de roca metamórficos observados en las formaciones Mora y El Castellar y la presencia de abundante feldespato-K y fragmentos de roca plutónicos en la Fm. Camarillas. La sedimentación de las areniscas de la Fm. Camarillas coincidió con el levantamiento y erosión del Macizo Ibérico. Para este momento, el área fuente principal estaba constituida por rocas plutónicas, lo que implica una dilución significativa de las áreas fuentes metamórficas, que fueron dominantes durante la sedimentación de las areniscas inferiores de las formaciones Mora y Castellar

Country
Spain
Related Organizations
Keywords

Iberian Chain, Heavy minerals, Geochemistry, Provenance, Sandstones, Lower Cretaceous

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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
Average
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Green