RT Journal Article T1 Estudio de las rocas madre del Albiense medio-superior de la región de Bir M'Cherga, Túnez: interacción de la diagénesis orgànica-inorgànica con la migración primaria de hidrocarburos T1 Organic/inorganic diagenesis interactions with the oil migration in the Middle-Upper Albian source rocks of the Bir M'Cherga region, Túnez A1 Permanyer, Albert A1 Marfil Pérez, Rafaela AB Geochemical, mineralógicaI and petrophysic examination of the source rocks of the Middle-Upper Albien maristones and chalks from the Bir M'Cherga region (Tunisia) provide insights into factors which control the organic and inorganic migration of hydrocarbons. Differences in the quantity and composition of clay minerals, type of organic matter, microfabric and porosity observed between chalks and maristones, reflect the different behaviour and intensity of the diagenetic processes: A) cementation, concretion growth, dissolution and mechanical compaction, in the maristones and B) overgrowth cements, recrystallization and chemical compaction, in the chalks. In these latter the microporosity has been reduced to very low levels, hindering the possibility of an additional avenue of early expulsion of hydrocarbons PB Sociedad Geológica de España YR 1994 FD 1994 LK http://hdl.handle.net/10272/13942 UL http://hdl.handle.net/10272/13942 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 15 jun 2026