RT Journal Article
T1 Diagénesis en las conchas de inocerámidos de la Isla de Castro (Coniaciense final-Santoniense inferior, Cuenca Vasco-Cantábrica): evidencias petrológicas e isotópicas
T1 Diagenesis of the inoceramid shells from the Castro Island (latest Coniacian-lower Santonian, Basque-Cantabrian Basin): petrological and isotopic evidences
A1 Jiménez Berrocoso, A.
A1 Elorza, Javier
AB Pétrographie and isotopic (á!80 and a13C) analyses have been carried out on inoceramid shells from shallow-marine limestone-marl couplets at the Castro Island section (latest Coniacian-lower Santonian, Basque-Cantabrian Basin), in order to determine their diagenetic alteration. Results show that the prismatic microstructure of the shells was mainly affected by silica replacement during diagenesis, but very little compaction, cementation and recrystallization occurred. However, these changes do not seem to have modified largely the isotopic composition of the inoceramids, as supported by the low luminescence intensity that show all the shells. In addition, à780 and al3C mean values from inoceramids included in limestones are heavier than those from inocermids in marls, which confirms that the isotopic values were influenced by a paleoceanographic circulation model with estuarine and anti-estuarine regimens
PB Sociedad Geológica de España
YR 2002
FD 2002
LK http://hdl.handle.net/10272/9985
UL http://hdl.handle.net/10272/9985
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 13 jul 2026