TY - JOUR
T1 - Kimmeridgian–Berriasian stratigraphy and sedimentary evolution of the central Iberian Rift System (NE Spain)
AU - Aurell, Marcos
AU - Bádenas, Beatriz
AU - Canudo, José Ignacio
AU - Castanera, Diego
AU - García-Penas, Álvaro
AU - Gasca, José M.
AU - Martín-Closas, Carles
AU - Moliner, Luis
AU - Moreno-Azanza, Miguel
AU - Rosales, Idoia
AU - Santas, L.
AU - Sequero, Cristina
AU - Val, Jesús
N1 - This research was subsidized by the Spanish Ministry of Science and Innovation (project CGL2017-85038-P) and by the Government of Aragon-FEDER 2014-2020 Construyendo Europa desde Aragon (Group E18: Aragosaurus: Recursos GeolOgicos y Paleoambientales).
Authors would like to acknowledge the use of Servicio General de Apoyo a la Investigacion-SAI, Universidad de Zaragoza. DC is supported by AGAUR (Beatriu de Pine's Programme, BP2017). MMA is supported by a postdoctoral grant by FCT (grant number SFRH/BPD/113130/2015).
PY - 2019/11
Y1 - 2019/11
N2 - Sequence-stratigraphic, biostratigraphic and strontium-isotopic data have made it possible to update what is known of the stratigraphy and sedimentary evolution of the Kimmeridgian–Berriasian synrift successions recorded in four subbasins (Aguilón, Oliete, Morella, Galve) of the central Iberian Rift System (NE Spain). The studied successions are arranged in three unconformity-bounded synrift sequences. Synrift sequence 1A (Kimmeridgian–mid-early Tithonian) includes four transgressive-regressive sequences deposited on low-angle carbonate ramps, characterized by shallow-water grain-supported facies and coeval open-marine rhythmic successions of marls and lime mudstones (overall thickness ranging from 120 to 250 m). Ammonite biostratigraphy, combined with the last occurrence of Alveosepta jaccardi (Schrodt) and strontium-isotopic data constrains the Kimmeridgian-Tithonian boundary towards the uppermost part of synrift sequence 1A. Synrift sequence 1B (mid-early Tithonian to mid-Berriasian) consists of coastal to shallow-marine carbonate to mixed carbonate-siliciclastic successions, with a continuous record in the depocentral areas of the Morella and Galve subbasins (up to 365 m in thickness). Anchispirocyclina lusitanica (Egger) is common in the lower and middle part of the sequence, whereas charophytes of the lower Berriasian Globator maillardii maillardii Zone are recorded in its upper part. Strontium-isotopic data and ostracods whose first occurrence is Berriasian, indicate that the Tithonian-Berriasian boundary is located towards the mid-upper part of the synrift sequence 1B. Synrift sequence 1C (mid-Berriasian–mid-early Valanginian) is locally recorded in the Galve subbasin and consists of siliciclastic continental successions (up to 100 m in thickness). The available biostratigraphic data (charophytes, ostracods, sporomorphs) indicate that this sequence was deposited upwards from early Berriasian Globator maillardii incrassatus Zone. The presence of the lower Valanginian successions at the upper part of synrift sequence 1C in certain subsiding areas of the Galve subbasin cannot be ruled out. The sequence-stratigraphic and biostratigraphic data reported here indicate that the Galve and Morella subbasins started to develop during the Kimmeridgian. Successive stages of tectonic activity affected these subbasins during the mid-early Tithonian, the mid-Berriasian, and around the Berriasian-Valanginian transition. The stratigraphy and tectono-sedimentary evolution of the central Iberian Rift System indicate that the Berriasian successions are linked to the “Jurassic cycle”.
AB - Sequence-stratigraphic, biostratigraphic and strontium-isotopic data have made it possible to update what is known of the stratigraphy and sedimentary evolution of the Kimmeridgian–Berriasian synrift successions recorded in four subbasins (Aguilón, Oliete, Morella, Galve) of the central Iberian Rift System (NE Spain). The studied successions are arranged in three unconformity-bounded synrift sequences. Synrift sequence 1A (Kimmeridgian–mid-early Tithonian) includes four transgressive-regressive sequences deposited on low-angle carbonate ramps, characterized by shallow-water grain-supported facies and coeval open-marine rhythmic successions of marls and lime mudstones (overall thickness ranging from 120 to 250 m). Ammonite biostratigraphy, combined with the last occurrence of Alveosepta jaccardi (Schrodt) and strontium-isotopic data constrains the Kimmeridgian-Tithonian boundary towards the uppermost part of synrift sequence 1A. Synrift sequence 1B (mid-early Tithonian to mid-Berriasian) consists of coastal to shallow-marine carbonate to mixed carbonate-siliciclastic successions, with a continuous record in the depocentral areas of the Morella and Galve subbasins (up to 365 m in thickness). Anchispirocyclina lusitanica (Egger) is common in the lower and middle part of the sequence, whereas charophytes of the lower Berriasian Globator maillardii maillardii Zone are recorded in its upper part. Strontium-isotopic data and ostracods whose first occurrence is Berriasian, indicate that the Tithonian-Berriasian boundary is located towards the mid-upper part of the synrift sequence 1B. Synrift sequence 1C (mid-Berriasian–mid-early Valanginian) is locally recorded in the Galve subbasin and consists of siliciclastic continental successions (up to 100 m in thickness). The available biostratigraphic data (charophytes, ostracods, sporomorphs) indicate that this sequence was deposited upwards from early Berriasian Globator maillardii incrassatus Zone. The presence of the lower Valanginian successions at the upper part of synrift sequence 1C in certain subsiding areas of the Galve subbasin cannot be ruled out. The sequence-stratigraphic and biostratigraphic data reported here indicate that the Galve and Morella subbasins started to develop during the Kimmeridgian. Successive stages of tectonic activity affected these subbasins during the mid-early Tithonian, the mid-Berriasian, and around the Berriasian-Valanginian transition. The stratigraphy and tectono-sedimentary evolution of the central Iberian Rift System indicate that the Berriasian successions are linked to the “Jurassic cycle”.
KW - Berriasian
KW - Iberia
KW - Stratigraphy
KW - Tectono-sedimentary evolution
KW - Tithonian
UR - http://www.scopus.com/inward/record.url?scp=85067417237&partnerID=8YFLogxK
U2 - 10.1016/j.cretres.2019.05.011
DO - 10.1016/j.cretres.2019.05.011
M3 - Article
AN - SCOPUS:85067417237
SN - 0195-6671
VL - 103
JO - Cretaceous Research
JF - Cretaceous Research
M1 - 104153
ER -