High Mediterranean water-level during the Lago-Mare phase of the Messinian Salinity Crisis: insights from the Sr isotope records of Spanish marginal basins (SE Spain)

Andreetto, Federico; Matsubara, Kayo; Beets, C.; Fortuin, A.R.; Flecker, Rachel; Krijgsman, Wout

doi:10.1016/j.palaeo.2020.110139

Cited by 16 publications

(35 citation statements)

References 125 publications

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“…However, some authors have argued for much smaller water level variations (<200 m) and alternative mechanisms for the formation of incised channels (Roveri, Manzi, et al., 2014). The widespread occurrence of brackish lacustrine ‘Lago Mare’ deposits on top of the deep and marginal evaporites has led other authors to suggest that the basins were already connected at high water level before the end of the Messinian (Andreetto et al., 2020, 2021; Stoica et al., 2016), which would be at odds with an outburst flood from the Atlantic Ocean.…”

Section: Introductionmentioning

confidence: 99%

Flexural‐isostatic reconstruction of the Western Mediterranean during the Messinian Salinity Crisis: Implications for water level and basin connectivity

et al. 2021

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During the Messinian Salinity Crisis (MSC, 5.97–5.33 Ma), thick evaporites were deposited in the Mediterranean Sea associated with major margin erosion. This has been interpreted by most authors as resulting from water level drop by evaporation but its timing, amplitude and variations between subbasins are poorly constrained due to uncertainty in post‐Messinian vertical motions and lack of a clear time‐correlation between the marginal basin and offshore records. The Balearic Promontory and surrounding basins exemplify a range of responses to this event, from margin erosion to up to a kilometre thick Messinian units in the abyssal areas containing the majority of the MSC halite. The Balearic Promontory contains unique patches of halite with thickness up to 325 m at intermediate depths that provide valuable information on water level during the stage of halite deposition. We compile seismic markers potentially indicating ancient shorelines during the drawdown phase: the first is marked by the transition from the MES to UU based on seismic data. The second is the limit between the bottom erosion surface (BES) and abyssal halite deposits. We restore these shorelines to their original depth accounting for flexural isostasy and sediment compaction. The best‐fitting scenario involves a water level drop of ca. 1,100 ± 100 m for the Upper unit level and 1,500 ± 100 m for the BES level. According to our results, halite deposition began in the Central Mallorca Depression at 1,300–1,500 m depth, perched hundreds of metres above the deep basins, which were at 1,500–1,800 m (Valencia Basin) and >2,900 m (Algerian Basin). The hypothesis that erosion surfaces were formed subaerially during the drawdown phase is consistent with a model of halite deposition before/during the water level drop of at least 1,000 m, followed by the deposition of the Upper unit until the MSC is terminated by the reinstatement of normal marine conditions.

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Section: Introductionmentioning

confidence: 99%

Flexural‐isostatic reconstruction of the Western Mediterranean during the Messinian Salinity Crisis: Implications for water level and basin connectivity

et al. 2021

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“…drill speed, U/Pb downhole fractionation) and ionization in the plasma (Ca 2+ as the main cation). For evaluating the suitability of the calcite-based corrections, we have analysed gypsum and anhydrite samples from the Messinian Salinity Crisis (MSC) in the Mediterranean Sea (Roveri et al, 2014a, b;Vasiliev et al, 2017;Grothe et al, 2020;Andreetto et al, 2021) and compared them with their astrochronological data (calibrated with astronomically tuned timescales, such as Milankovic cycles, Laskar, 1999).…”

Section: Introductionmentioning

confidence: 99%

In situ LA-ICPMS U–Pb dating of sulfates: applicability of carbonate reference materials as matrix-matched standards

Beranoaguirre

Vasiliev²,

Gerdes³

2022

Geochronology

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Abstract. Recent developments in analytical capabilities in the field of in situ laser ablation mass spectrometry (LA-ICPMS) have expanded the applications of U–Pb geochronometers in low-U minerals such as carbonates or garnets. The rapid evolution of the technique relies on well-characterized matrix-matched reference materials. In this article, we explore the suitability of using carbonate as an “almost-matrix-matched reference material” for in situ U–Pb dating of sulfates. For such purpose, we have used the astrochronologically dated gypsum and anhydrite samples deposited during the Messinian Salinity Crisis (5.97–5.33 Ma) and compared these dates with the U–Pb ages obtained by LA-ICPMS. Although the majority of the samples failed due to the elevated common Pb content and low 238U/204Pb ratios, five of the samples showed a higher dispersion on U/Pb ratios. The obtained dates in four of these samples are comparable with the expected ages, while another gave an unexpected younger age, each of them with 6 %–11 % of uncertainty. The pit depth of the spots showed that the sulfates ablate similar to carbonates, so the offset due to the crater geometry mismatch or downhole fractionation can be assumed to be negligible. To sum up, the bias between the U–Pb and expected cyclostratigraphic ages, if any, is included in the uncertainty, and thus the results obtained here suggest that carbonate reference material is currently the best option for standardization of in situ U–Pb sulfate analyses.

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“…A well‐studied example is provided by the Mediterranean basin that recorded a marked transition from marine (at the onset of MSC at 5.97 Ma) to restrictive river dominated 87 Sr/ 86 Sr values (between 5.55 and 5.33 Ma), controlled by the increasing relative contribution of riverine versus marine water supply (e.g., Flecker et al., 2002; Roveri, Lugli et al., 2014; Schildgen et al., 2014; Reghizzi et al., 2018). Rivers generally have characteristic isotopic compositions and concentrations reflecting the lithology of the hinterland (e.g., Grothe et al., 2020; Andreetto, Matsubara et al., 2021). In the semi‐isolated Paratethys, several isotopically different water sources contributed to its hydrology (e.g., proto‐Danube, Don, Dnjepr, Volga, and intermittently the Mediterranean).…”

Section: Introductionmentioning

confidence: 99%

Hydrological Changes in Restricted Basins: Insights From Strontium Isotopes on Late Miocene‐Pliocene Connectivity of the Eastern Paratethys (Dacian Basin, Romania)

Vasiliev

Stoica

Grothe

et al. 2021

Geochem Geophys Geosyst

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High Mediterranean water-level during the Lago-Mare phase of the Messinian Salinity Crisis: insights from the Sr isotope records of Spanish marginal basins (SE Spain)

Cited by 16 publications

References 125 publications

Flexural‐isostatic reconstruction of the Western Mediterranean during the Messinian Salinity Crisis: Implications for water level and basin connectivity

Flexural‐isostatic reconstruction of the Western Mediterranean during the Messinian Salinity Crisis: Implications for water level and basin connectivity

In situ LA-ICPMS U–Pb dating of sulfates: applicability of carbonate reference materials as matrix-matched standards

Hydrological Changes in Restricted Basins: Insights From Strontium Isotopes on Late Miocene‐Pliocene Connectivity of the Eastern Paratethys (Dacian Basin, Romania)

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