Lithofacies and water-body record of Messinian evaporites in Nijar Basin, SE Spain

Lu, Feng

doi:10.1016/j.sedgeo.2006.03.001

Cited by 22 publications

(28 citation statements)

References 34 publications

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“…Gypsum dissolution in this NW part of the study area indicates the relative importance of groundwater. As pointed out by Lu (2006) the radiogenic Sr content in Feos gypsum interbeds implies that Feos brines had a significant contribution of freshwater. In general, groundwater levels may be expected to be higher more basin inwards but, in the particular setting of basinward-dipping clinoforms pinching-out in less permeable, marl-rich strata, a relatively high groundwater level may well have existed at the former reef front during deposition of these marginal coarse clastics.…”

Section: Soft-sediment Deformation In Internal Continental Feos Cyclesmentioning

confidence: 90%

Evidence for Late Messinian seismites, Nijar Basin, south‐east Spain

Fortuin¹,

Dabrio

2008

Sedimentology

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The Feos Formation of the Nijar Basin comprises sediments deposited during the final stage of the Messinian salinity crisis when the Mediterranean was almost totally isolated. Levels of soft-sediment deformation structures occur in both conglomeratic alluvial sediments deposited close to faults and the hyposaline Lago Mare facies, a laminated and thin-bedded succession of whitish chalky marls and intercalated sands alternating with non-marine coastal plain deposits. Deformation structures in the coarse clastics include funnel-shaped depressions filled with conglomerate, liquefaction dykes terminating downwards in gravel pockets, soft-sediment mixing bodies, chaotic intervals and flame structures. Evidence for soft-sediment deformation in the fine-grained Lago Mare facies comprises syndepositional faulting and fault-grading, sandstone dykes, mixed layers, slumping and sliding of sandstone beds, convolute bedding, and pillar and flame structures. The soft-sediment deformed intervals resemble those ascribed elsewhere to seismic shaking. Moreover, the study area provides the appropriate conditions for the preservation of deformation structures induced by seismicity; such as location in a tectonically active area, variable sediment input to produce heterolithic deposits and an absence of bioturbation. The vertical distribution of soft-sediment deformation implies frequent seismic shocks, underlining the importance of seismicity in the Betic region during the Late Messinian when the Nijar Basin became separated from the Sorbas Basin to the north. The presence of liquefied gravel injections in the marginal facies indicates strong earthquakes (M ‡ 7). The identification of at least four separate fissured levels within a single Lago Mare interval suggests a recurrence interval for large magnitude earthquakes of the order of millennia, assuming that the cyclicity of the alternating Lago Mare and continental intervals was precession-controlled. This suggestion is consistent with the present-day seismic activity in SE Spain.

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Section: Soft-sediment Deformation In Internal Continental Feos Cyclesmentioning

confidence: 90%

Evidence for Late Messinian seismites, Nijar Basin, south‐east Spain

Fortuin¹,

Dabrio

2008

Sedimentology

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“…Different scenarios for the depositional environment of the so-called "Lower Evaporites" of the Mediterranean Messinian Salinity Crisis. Hypotheses range from: A) very shallow water and major draw down (N1000 m) of the Messinian sea level (Hsü et al, 1973;Rouchy and Caruso, 2006), via B) shallow water achieved by a minor (~150 m) sea level lowering -with evaporite deposition only in marginal basins - (Clauzon et al, 1996;Roveri and Manzi, 2006), to C) hardly any sea level lowering, but uplift in the Gibraltar region, restricting exchange and a the Mediterranean water level similar to the Atlantic level (Krijgsman et al, 1999b;Lu, 2006). Decima and Wezel, 1973) to the seismic cross-sections of the deep western Mediterranean basins (after Lofi et al, 2005).…”

Section: Chronostratigraphy Of the Messinian Salinity Crisismentioning

confidence: 99%

“…Hypotheses for "Lower Evaporite" deposition ( Fig. 1) range from: A) very shallow waters and major draw down (N1000 m) of the Mediterranean Messinian sea level (Hsü et al, 1973;Rouchy and Saint-Martin, 1992;Rouchy and Caruso, 2006), via B) shallow waters by a minor (~150 m) sea level lowering -with evaporite deposition only at silled marginal basins - (Clauzon et al, 1996;Roveri and Manzi, 2006), to C) hardly any sea level lowering and the Mediterranean water level similar to the Atlantic level (Krijgsman et al, 1999b;Lu, 2006).…”

Section: Introductionmentioning

confidence: 99%

Depositional environments of the Mediterranean “Lower Evaporites” of the Messinian salinity crisis: Constraints from quantitative analyses

2008

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“…the pycnocline, Bąbel 2007) that repeatedly stopped the growth of crystals: as a consequence no large crystals could develop, as in the case of massive selenite (e.g. Schreiber, 1978;Lu, 2006;Bąbel, 2007). According to Lugli et al (2010) these conditions suggest a minimum level of the saturated brines: in particular, the banded selenite facies would mark the peak of aridity in the cyclical deposition of evaporites.…”

Section: First Msc Stagementioning

confidence: 99%