Publication: Posibilidades lignitíferas de la cuenca Neógena
de Ademuz (Fosa de Teruel)
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1983
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Instituto Geológico y Minero de España
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Abstract
La cuenca Terciaria de Ademuz es una cuenca intramontañosa-finialpídica colmatada por sedimentos del Mioceno-Plioceno. Se han distinguido cinco unidades litoestratigráficas en los sedimentos terciarios, de las cuales la Unidad Blanca Inferior presenta cierto interés en cuanto a posibilidades lignitíferas. Corresponde esta Unidad a un ambiente lacustre, en el que se depositan dos tipos de facies: Una travertínica, indicadora de un medio palustre muy somero, con abundante vegetación y condiciones oxidantes, y otra de ambiente tipo charca, que corresponde a un medio con lámina de agua escasa, pero mayor que en el caso anterior, con aguas tranquilas y condiciones reductoras, que son las idóneas para la acumulación de restos vegetales y formación de carbón. Las facies de último tipo predominan en dos zonas telmáticas, situadas al abrigo de islas interiores o en zonas marginales, en ambos casos protegidas de los aportes terrígenos, pero fuera de la zona de deposición de sedimentos exclusivamente lacustres, que se corresponden con las zonas de mayor cantidad de indicios de lignito.
The Tertiary basin of Ademuz is an intramountainous-finalpidic basin filled with Miocene-Pliocenc sediments. Five lithoestratigraphic units have been defined in these Tertiary sediments and, amogn them, the «Unidad Blanca Inferior» presents a certain interest with respect to its possibilites about lignite. It corresponds to a lacustrine medium in which two kinds of facies have bccn deposited: One of them a travertine facies indicating a shallow-water, marshy medium, with abundant vegetation and oxidant conditions, and the other, a swamp-type ambience facies indicating a medium with also a sallow-water sheet but deeper than in the precccding case, with calm water and reducing conditions which are optimal to produce the cumulation of vegetable remains and the formation of coal. The facies of the last kind are the predominant ones in two «telmatics» zones, which are situated shielded by interior islands or in marginal areas, in any case protected from terrigenous drifts but out of the zones where only lacustrine sediments are deposited; which correspond with zones where most of the índices of lignite appear.
The Tertiary basin of Ademuz is an intramountainous-finalpidic basin filled with Miocene-Pliocenc sediments. Five lithoestratigraphic units have been defined in these Tertiary sediments and, amogn them, the «Unidad Blanca Inferior» presents a certain interest with respect to its possibilites about lignite. It corresponds to a lacustrine medium in which two kinds of facies have bccn deposited: One of them a travertine facies indicating a shallow-water, marshy medium, with abundant vegetation and oxidant conditions, and the other, a swamp-type ambience facies indicating a medium with also a sallow-water sheet but deeper than in the precccding case, with calm water and reducing conditions which are optimal to produce the cumulation of vegetable remains and the formation of coal. The facies of the last kind are the predominant ones in two «telmatics» zones, which are situated shielded by interior islands or in marginal areas, in any case protected from terrigenous drifts but out of the zones where only lacustrine sediments are deposited; which correspond with zones where most of the índices of lignite appear.