Materia orgánica y diagénesis de la formación de margas del Mas d´Ascla (Jurásico superior) en la cuenca del Maestrazgo (Cadena Ibérica oriental)

Permanyer Bastardas, Albert; Marfil Pérez, Rafaela; Salas Roig, Ramón; Peña Blasco, José Andrés; Dorronsoro Fernández, Carlos F.; Rossi Nieto, Carlos

Materia orgánica y diagénesis de la formación de margas del Mas d´Ascla (Jurásico superior) en la cuenca del Maestrazgo (Cadena Ibérica oriental)

Download

margas del Mas d'Ascla_Marfil(2000).pdf (1.2 MB)

Publication date

2000

Authors

Permanyer Bastardas, Albert

Marfil Pérez, Rafaela

Salas Roig, Ramón

Peña Blasco, José Andrés

Dorronsoro Fernández, Carlos F.

Rossi Nieto, Carlos

Publisher

Sociedad Geológica de España

Citations

Exportar

URI

https://hdl.handle.net/20.500.14352/104711

Citation

Permanyer Bastardas, A. et al. (2000): «Materia orgánica y diagénesis de la formación de margas del Mas d´Ascla (Jurásico superior) en la cuenca del Maestrazgo (Cadena Ibérica oriental)», Geogaceta, 28, pp. 117-120.

Abstract

The Mas d'Ascla marls Fm. (Upper Kimmeridgian to lowermost Tithonian) in the Maestrat Basin (Salzedella sub-basin, Castellò de la Plana) displays two organic-carbon-rich horizons which indicate anoxic conditions. The maximum anoxic event is located at the base of the formation corresponding to the lower part of the trangressive system tract. In both horizons the kerogen is mainly of marine origin with algal and amorphous sapropelic organic matter, a low organic carbon content (0.5% - 1.26%) and a low potential yield of hydrocarbons (HC). These data and the Tmax. suggest a mature source-rock which has already generated nearly all HC. Extractable organic matter is fundamentally composed of asphaltenes and resins predominating over saturate and aromatic compounds which have been probably expulsed out of the source rock.