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Estratigrafía y estructura de los materiales permotriásicos del sector Gijón - La Collada (Asturias)

Authors: Areces, J. L.; Martínez-García, E.; Pieren, A. P.; Toraño, J.;

Estratigrafía y estructura de los materiales permotriásicos del sector Gijón - La Collada (Asturias)

Abstract

[ES] Una campaña de investigación geológico-minera del yacimiento carbonífero de «Mina La Camocha» ha aportado nuevos y abundantes datos del Pérmico de la Orla Cantábrica. Al no aflorar en ningún punto el Carbonífero investigado con fines mineros, se realizó una campaña de exploración profunda que contó con líneas sísmicas, sondeos geológico-mineros de superficie e interior y sondeos de investigación hidrogeológica. Todos ellos han permitido reconocer en varios puntos la cobertera permotriásica completa, aportando numerosas precisiones y la discriminación de unidades que generalmente no afloran. Se distinguen y caracterizan ocho unidades litoestratigráficas locales con rango de miembro, que se datan mediante correlación regional. En las unidades basales se observan importantes cambios de facies y de potencia relacionados con la configuración geodinámica inicial de la cuenca. Se propone un modelo de evolución ambiental de ésta. La investigación realizada permite situar y acotar en edad las principales fallas que en determinados momentos han condicionado la sedimentación, distinguiéndose fallas alpinas y tardihercínicas. Del estudio de estos materiales considerados pérmicos, ha resultado un mejor conocimiento de la Formación Caravia («Saxoniense») en la subcuenca de Gijón-Villaviciosa.

[EN] A geological and mining investigation campaign, of the buried «La Camocha Mine» coalfield, has indirectly provided several new data of the Cantabrian seaside Permian rocks (Asturias, N. Spain). As the Carboniferous investigated with mining purposes, does not crop out in the studicd area, the eampaign was carried out including seismie Enes, surface and underground inclined geological, and hydrogeological research diamond drilí boreholes. AII of them recognised the complete permotriassic cover, providing several findings of different units, generally non-outcropping. Eight local lithostratigraphic units with member rank are distinguished, characterized and dated as Permian through regional correlations. Important thickness and facies changes are observed within basal units. These are related with the initial geodynamic setting of the sedimentary basin. An environmental evolution is proposed. The investigation developed has enabled to precisely situate and limit the age of the main faults that in some specific periods have constraint sedimentation, and furthermore, alpine and late hercynian fractures are distinguished. The study of these Permian sequences is enhancing the knowledge of the Caravia Fm. (Saxonian) in the Gijón-Villaviciosa sub-basin.

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Keywords

Lithostratigraphy, Sísmica, Late hercynian faulting, Orla Cantábrica, Asturias, Fracturación Alpina, Permian, Alpine faulting, Cantabrian margin, Fm. Caravia, Fracturación Tardihercínica, Pérmico, Diamond Boreholes, Sondeos, Gijón, Litoestratigrafía, Caravia Fm., Seismic Lines

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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.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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