Publication: Tectónica y metamorfismo del Macizo Hercínico de Honrubia (Provincia de Segovia)
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1981
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Servicio de Publicaciones de la Universidad Complutense de Madrid
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Abstract
En este trabajo se confirma que el Macizo de Honrubia es la prolongación nordoccidental, del sector oriental del Sistema Central. En él se reconoce la continuación de la Falla de Berzosa, y se describe una nueva falla dúctil (Falla de Honrubia, que se equipara al cabalgamiento basal de la antiforma de Hiendelaencina. Estos accidentes de tipo dúctil se relacionan con la F2 de la tectogénesis Hercínica. Al igual que en el Sistema Central las F, y F2 son vergentes al NE y muy tendidas, mientras que la F3 lo es al SW y con plano axial más inclinado. Con posterioridad a la F3 se desarrolla la Falla del Risco de tipo inverso y responsable, junto con la de Honrubia del adelgazamiento de todo el sector que en el Sistema Central, que está comprendido entre las fallas de Berzosa y de Hiendelaencina. La sucesión zonal metamórfica es semejante a la de la región de Buitrago, confirmando la existencia de una fuerte inversión en relación con los cabalgamientos sin-F2, que es propia de dominios colisionales.
This work confirms that the Honrubia Massif is just the northwestern prolongation of the eastern part of the Spanish Central System. On one side, one finds the continuation of the Berzosa ductile lowangle tbrust, and moreover a new ductile low-angle thrust- the Honrubia Fault- is described, whicb is considered equivalent to the basal thrust in the 1-liendelaencina antycline. These accidents are related to the F2 of the Hercynian tectogenesis. Like in the Central System, F, and F2 face northeastward with gently diping axial planes, whilst F3 faces in the opposite direction with more inclined axial planes. Another discovered faut-the Risco high-angle thrust- played at the end of F2. This fault along with the Honrubia Fault are responsable for the great thinning of all the area which in the Central System is comprised between the Berzosa and the Hiendelaencina thrusts. The metamorphic regional succession is similar to the Buitrago’s region one aud confirms again the existence of a remarkable metamorphic inversion related to the syn-F2 thrusts, wbich is typical of collisional orogenic belts.
This work confirms that the Honrubia Massif is just the northwestern prolongation of the eastern part of the Spanish Central System. On one side, one finds the continuation of the Berzosa ductile lowangle tbrust, and moreover a new ductile low-angle thrust- the Honrubia Fault- is described, whicb is considered equivalent to the basal thrust in the 1-liendelaencina antycline. These accidents are related to the F2 of the Hercynian tectogenesis. Like in the Central System, F, and F2 face northeastward with gently diping axial planes, whilst F3 faces in the opposite direction with more inclined axial planes. Another discovered faut-the Risco high-angle thrust- played at the end of F2. This fault along with the Honrubia Fault are responsable for the great thinning of all the area which in the Central System is comprised between the Berzosa and the Hiendelaencina thrusts. The metamorphic regional succession is similar to the Buitrago’s region one aud confirms again the existence of a remarkable metamorphic inversion related to the syn-F2 thrusts, wbich is typical of collisional orogenic belts.