Kimmeridgian palaeogeography and basin evolution of northeastern Iberia

Bádenas, Beatriz; Aurell, Marc

doi:10.1016/s0031-0182(01)00204-8

Cited by 55 publications

(52 citation statements)

References 12 publications

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“…Analogous situations affecting Upper Oxfordian deposits were later reported with regard to the evolution of the central North Atlantic and the Western Tethyan basins (e.g., Goldhammer, 1998;Leinfelder and Wilson, 1998;Allenbach, 2001;Bádenas and Aurell, 2001;Salas et al, 2001).…”

Section: Interpretation Of Stratigraphic Geochemical Fluctuationssupporting

confidence: 55%

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Reolid

Martı́nez-Ruiz

2013

Journal of Iberian Geology

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Comparison of the stratigraphic distribution of major and trace elements, used as proxies for palaeoproductivity and redox conditions, and benthic foraminifera from Oxfordian shelf deposits of the External Prebetic (Betic Cordillera, South Spain) allows us to recognise two sedimentary cycles, both characterised by initial enhanced productivity and decreasing oxygen availability in the seabottom, and a subsequent decreasing productivity with a recovering in oxygenation during the second half of each cycle. Dysoxic conditions appear to coincide with maximums in marine surface productivity, thus suggesting that oxygen depletion may be linked to greater consumption rather than restricted circulation. The boundary between the two cycles is characterised by low contents of redox-sensitive elements and lower TOC content and Sr/Al, P/Ti, Ca/Al and Ba/Al ratios, indicating well oxygenated sea-bottom, lower productivity and lower organic matter accumulation. The geochemical proxies have also revealed as a valuable tool for interpreting the stratigraphic fluctuations of benthic foraminiferal assemblages, as well as for evaluating the palaeoecology of the main genera. Spirillina is adversely influenced by oxygen depletion independently of food availability. Ophthalmidium presents very good correspondence with palaeoproductivity fluctuations, and tolerated low oxygen levels in the sediment-water interface. Reophax was an opportunist that proliferated after adverse conditions when oxygenation and food availability were limiting factors. The variability in the microhabitat depth inside the sediment of Reophax favoured adaptation to adverse conditions. Lenticulina shows behaviour similar to Reophax. Finally, Ammobaculites shows a low degree of relation with the palaeoproductivity proxies, and is intolerant with respect to low oxygen values in shallow infaunal microhabitats.

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Section: Interpretation Of Stratigraphic Geochemical Fluctuationssupporting

confidence: 55%

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Reolid

Martı́nez-Ruiz

2013

Journal of Iberian Geology

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“…Similar oncolitic deposits have been previously described in the Higueruelas Fm in other areas of the Iberian Basin and have been interpreted as oncoid shoals subjected to the action of episodic storms in the middle ramp of a storm-dominated carbonate platform (Aurell et al, 1994;1999;Ipas et al, 2004). Comparable oncolitic deposits have been also described in the Late Kimmeridgian Torrecilla Fm in other sectors of the Iberian Basin (Zaragoza and Teruel provinces), where they have been interpreted as deposited in the middle ramp of a carbonate platform affected by storms (Bádenas et al, 1993;, which produced undertow currents out to the sea, located eastwards (Bádenas, 1999;Aurell et al, 1995;Bádenas and Aurell, 2001b).…”

Section: I: Large-scale Crossbedded Sandstone Facies Associationmentioning

confidence: 84%

Revisiting the Late Jurassic-Early Cretaceous of the NW South Iberian Basin: new ages and sedimentary environments

Campos-Soto

Benito

Mas

et al. 2016

Journal of Iberian Geology

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The study of the Upper Jurassic-Lower Cretaceous deposits (Higueruelas, Villar del Arzobispo and Aldea de Cortés Formations) of the South Iberian Basin (NW Valencia, Spain) reveals new stratigraphic and sedimentological data, which have significant implications on the stratigraphic framework, depositional environments and age of these units. Moreover, these new data encourage revising the previously proposed stratigraphic correlations between the studied units and those deposited in adjacent areas of the Iberian Basin.The Higueruelas Fm was deposited in a mid-inner carbonate platform where oncolitic bars migrated by the action of storms and where oncoid production progressively decreased towards the uppermost part of the unit. The overlying Villar del Arzobispo Fm has been traditionally interpreted as an inner platform-lagoon evolving into a tidal-flat. Here it is interpreted as an inner-carbonate platform affected by storms, where oolitic shoals protected a lagoon, which had siliciclastic inputs from the continent. The Aldea de Cortés Fm has been previously interpreted as a lagoon surrounded by tidal-flats and fluvial-deltaic plains. Here it is reinterpreted as a coastal wetland where siliciclastic muddy deposits interacted with shallow fresh to marine water bodies, aeolian dunes and continental siliciclastic inputs.The contact between the Higueruelas and Villar del Arzobispo Fms, classically defined as gradual, is interpreted here as gradual and rapid, because the transition between both units comprises few meters. More importantly, the contact between the Villar del Arzobispo and Aldea de Cortés Fms, previously considered as unconformable, is here interpreted as gradual.The presence of Alveosepta in the Villar del Arzobispo Fm suggests that at least part of this unit is Kimmeridgian, unlike the previously assigned Late Tithonian-Middle Berriasian age. Consequently, the underlying Higueruelas Fm, previously considered Tithonian, should not be younger than Kimmeridgian. Accordingly, sedimentation of the Aldea de Cortés Fm, previously considered Valanginian-Hauterivian, probably started during the Tithonian and it may be considered part of the regressive trend of the Late Jurassic-Early Cretaceous cycle. This is consistent with the dinosaur faunas, typically Jurassic, described in the Villar del Arzobispo and Aldea de Cortés Fms Keywords: Mixed carbonate-siliciclastic platform, coastal wetland, Foraminifera, Spain, Kimmeridgian, Tithonian Resumen El estudio de los depósitos del Jurásico Superior-Cretácico Inferior (formaciones Higueruelas, Villar del Arzobispo y Aldea de Cortés) de la Cuenca Suribérica (NO provincia de Valencia, E España) ha revelado nuevos datos estratigráficos y sedimentológicos, que tienen implicaciones importantes sobre el marco estratigráfico, el ambiente sedimentario y la edad de estas unidades. Además, estos nuevos datos sugieren que se deberían revisar las correlaciones estratigráficas realizadas previamente entre las unidades estudiadas y aquéllas depositadas en otras áreas adya...

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“…3, 5, 6). These mineralogical changes and the high detrital signature are most probably related to the relatively shallow setting of Ricla Barranco on the ramp, the neighbouring Ebro Massif providing the clastic input to this area (Fig.1, Bádenas and Aurell, 2001;Aurell et al, 2003), and the extensional tectonic activity that affected the sedimentation during the Late Jurassic in this part of the Iberian basin (Bádenas and Aurell, 2001). …”

Section: Clay Mineralogymentioning

confidence: 92%

“…At the same time, certain marginal areas of the Iberian ramp presented a very different kind of sedimentation in which siliciclastics and siliceous sponges dominated. In particular, the influence of siliciclastics was prominent during the latest Oxfordian, which has been related to tectonic activity (Bádenas and Aurell, 2001;Aurell et al, 2010). During the Late Jurassic and the Early Cretaceous, the evolution of the Iberian rift system is linked to northward propagation of rifting from the central Atlantic and the gradual opening of the North Atlantic oceanic basin (Martin-Chivelet et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Timing of sea level, tectonics and climate events during the uppermost Oxfordian (Planula zone) on the Iberian ramp (northeast Spain)

Colombié

Giraud

Schnyder

et al. 2014

Palaeogeography, Palaeoclimatology, Palaeoecology

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The middle Oxfordian warming climate and sea-level rise initiated the development of vast carbonate platforms in some western European basins. At the same time, however, siliciclastics and siliceous sponges dominated certain marginal areas of the Iberian ramp. There, siliciclastic input was particularly prominent during the latest Oxfordian and may have been related to a global sea-level fall, synsedimentary tectonic activity, or humid climatic conditions in the hinterland. Field analyses and computer modeling have been previously used to determine the factors that controlled sedimentation. However, it is still unclear if the specific conditions that prevailed during the latest Oxfordian were due to eustasy, tectonics or climate, and when precisely they occurred. Here, we document major changes in sedimentological, micropalaeontological, and mineralogical records on the Iberian ramp during this interval. Detailed sedimentary facies and palynofacies analyses combined with sequence-stratigraphic and cyclostratigraphic analyses of the Ricla Barranco section enable the establishment of a high-resolution time frame. Based on the quartz and mica percentage fluctuations, one large-and seven small-scale sequences are defined. The large-scale sequence boundaries correlate with third-order sequence boundaries Ox8 and Kim1 defined by Hardenbol et al. (1998). The large-scale maximum-flooding surface corresponds to the base of the most calcareous interval and to the maximum abundance of marine phytoplankton and opaque, equidimensional phytoclasts. The small-scale sequences correspond to the 100-kyr orbital eccentricity cycle. Calcareous nannofossils and clay minerals were used as palaeoclimatic proxies. Nannofossil abundances and fluxes are lower in the upper part than in the lower part of the interval studied, suggesting a decrease in sea-surface trophic conditions, also shown by an increase in the relative abundance of oligotrophic taxa. This upper part is also characterised by an increase in smectite, which coincides with the base of the large-scale highstand deposit, and is interpreted as reflecting the establishment of dry conditions. A first increase in smectite occurs in the lower part of the succession, and coincides with high percentages of quartz and mica. This latter mineralogical assemblage is interpreted as recording the onset of the Late Jurassic to Early Cretaceous rifting stage, which occurred just before the Planula-Galar ammonite Subzone transition. The present study points out a return toward optimum conditions for carbonate sedimentation only 300 kyr after the prominent increase in siliciclastic input due to tectonic activity. The recovery of carbonate production was accompanied by a global sea-level rise and by decreasing rainfall on nearby land.

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Kimmeridgian palaeogeography and basin evolution of northeastern Iberia

Cited by 55 publications

References 12 publications

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Comparison of benthic foraminifera and geochemical proxies in shelf deposits from the Upper Jurassic of the Prebetic (southern Spain)

Revisiting the Late Jurassic-Early Cretaceous of the NW South Iberian Basin: new ages and sedimentary environments

Timing of sea level, tectonics and climate events during the uppermost Oxfordian (Planula zone) on the Iberian ramp (northeast Spain)

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