RT Journal Article
T1 Evolución desde la diagénesis temprana al metamorfismo de los nodulos edáficos del grupo Urbión. Cretácico inferior. Cuenca de Cameros, La Rioja
T1 Evolution from early diagenesis to metamorphism ofpedogenetic nodules of the Urbion group (Early Cretaceous). Cameros basin. La Rioja. Northern Spain
A1 Alonso Azcárate, Jacinto
A1 Benito, María Isabel
A1 Mas, Ramón
A1 Rodas, M.
AB Pedogenetic carbonate nodules are a common feature in most of the depositional sequences of the Late Jurassic-Early Cretaceous Cameros Basin. This study deals with postsedimentary history (from early diagenesis to metamorphism) of nodules that appear in the Early Cretaceous (Barremian) host grey lutites of Urbion Croup at Valdeperillo where a pyrite hydrothermal mineralization was developed. Some of them are micritic nodules which are microseptarized. Inside this septaria is possible to recognize calcite cements from early to burial diagenesis. Inside the micritic matrix of these nodules, and replacing it, phyllosilicates as chlorites and muscovites are also recognized. These phyllosilicates would have precipitated during hydrothermal metamorphism that affected the area. The other type correspond to replaced nodules which do not conserve their original texture. In these nodules phyllosilicates (chlorites and muscovites) precipitated during the hydrothermal metamorphism. Afterwards a series of calcite cements precipitate also during and after the hydrothermal episode
PB Sociedad Geológica de España
YR 1996
FD 1996
LK http://hdl.handle.net/10272/11054
UL http://hdl.handle.net/10272/11054
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026