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handle: 10261/129785
[En] Results of physico-chemical, chemical and mineralogical analyses are given of rubificated slope deposits in the meridional sector of the Sierra de Ayllón. These results are compared with data on subactual deposits in the same zone. Extensive weathering is observed, with strong rubefaction, as is shown by the ratios between free Fe and total Fe. A degradation of chloritic minerals is likewise observed. The rubefacted deposits were formed from weathered paleozoic rocks, after the formation of raña, during the first stages of fluvial incision. These deposits therefore bear some relationship to the genesis of typical soils on raña, indicating similar climatic conditions. [Es] Se aportan los resultados de los análisis físico-químicos, químicos y mineralógicos de la matriz y cantos englobados en depósitos de vertiente rubificados del sector meridional de la Sierra de Ayllón. Los datos son comparados con los relativos a depósitos subactuales existentes en la misma zona. Se pone de manifiesto una intensa alteración, con fuerte rubefacción como señalan en particular las relaciones de Fe libre a total; así mismo se observa una degradación de los minerales cloríticos. Los depósitos rubefactados se formaron a partir de rocas paleozoicas alteradas, con posterioridad a la formación de la raña y en las primeras etapas de incisión fluvial, siendo por tanto relacionables con la génesis de los suelos típicos sobre la raña, que indican un ambiente climático similar.
C.S.I.C.- Centro de Estudios Históricos - Dpto. de Geología y Geoquímica
C.S.I.C- Instituto de Edafología y Biología Vegetal
Universidad Autónoma de Madrid- Dpto. de Geología
11 páginas, 3 cuadros y 2 figuras
Peer reviewed
Raña, Relaciones de Fe libre, Depósitos de vertiente rubificados, Minerales cloríticos
Raña, Relaciones de Fe libre, Depósitos de vertiente rubificados, Minerales cloríticos
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