Miocene to Pleistocene osmium isotopic records of the Mediterranean sediments

Kuroda, Junichiro; Jiménez-Espejo, Francisco Jose; Nozaki, Tatsuo; Gennari, Rocco; Lugli, Stefano; Manzi, Vinicio; Roveri, Marco; Flecker, Rachel; Sierro, Francisco J.; Yoshimura, Toshihiro; Suzuki, Katsuhiko; Ohkouchi, Naohiko

doi:10.1002/2015pa002853

Cited by 14 publications

(8 citation statements)

References 78 publications

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“…Subsamples were taken for inductively coupled plasma-mass spectrometry (ICP-MS) analysis, and diluted further with 3 % HNO 3 . Major and trace element concentrations were measured using a Thermo iCap quadrupole ICP-MS. Calibrations for each element are given by Kuroda et al (2007Kuroda et al ( , 2016 and Hara et al (2010). Analytical uncertainties (as relative standard deviation) for the bulk rock analysis were better than 3 % for major elements, and better than 5 % for trace elements.…”

Section: Methodsmentioning

confidence: 99%

Characterization of sulfate mineral deposits in central Thailand

et al. 2017

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In this paper we present petrographic and geochemical data of sulfate mineral deposits in northeast Nakhon Sawan, central Thailand, and provide new constraints on their age. The deposits are made up mainly of strongly deformed nodular and massive gypsum in the upper part, and less deformed layered anhydrite in the lower part. They are intruded by andesitic dikes that contain Middle Triassic zircons (ca 240 Ma). These dikes are probably part of the regional magmatic activity of the Sukhothai Arc during the Early to Middle Triassic. Sulfur (δ34S) and strontium (87Sr/86Sr) isotopic compositions of the sulfates range from 15.86‰ to 16.26‰ and from 0.70810 to 0.70817, respectively. Comparisons with the Phanerozoic seawater isotopic evolution curve indicate that those values are best explained by precipitation of the sulfates from Carboniferous seawater, in particular seawater of late Mississippian age (ca 326 Ma), and this would be consistent with previous studies of calcareous fossils in the limestones that crop out around this site. Our interpretation is that evaporitic gypsum was originally precipitated from hypersaline seawater on a shallow lagoon or shelf on the Khao Khwang Platform during the Serpukhovian, and that this gypsum changed to anhydrite during early burial. The anhydrite was then cut by andesitic dikes during the Middle Triassic, and more recently the upper part of which was rehydrated during exhumation to form secondary gypsum near the surface

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Section: Methodsmentioning

confidence: 99%

Characterization of sulfate mineral deposits in central Thailand

et al. 2017

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“…The Os i data serve as a proxy for marine connectivity and basin restriction (e.g., Du Vivier et al, 2014), since values reflect a mixture of osmium derived from relatively homogenized open marine waters (Gannoun and Burton, 2014), mixing over geologically brief intervals (τ<10 ka, Oxburgh, 2001;Rooney et al, 2016), and local continental weathered osmium which tends to be more radiogenic (higher Os i ) (Peucker-Ehrenbrink and Ravizza, 2000). As a result, lacustrine formations, isolated from the marine osmium reservoir, generally preserve higher Os i values due to the flux of proximal radiogenic osmium and limited unradiogenic osmium fluxes (e.g., cosmogenic dust and hydrothermal sources) (Poirier and Hillaire-Marcel, 2011;Cumming et al, 2012;Xu et al, 2017), with the caveat that lacustrine basins weathering ophiolitic lithologies preserve more unradiogenic Os i (Kuroda et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Evaluating Late Cretaceous OAEs and the influence of marine incursions on organic carbon burial in an expansive East Asian paleo-lake

Jones

Ibarra

Gao

et al. 2018

Earth and Planetary Science Letters

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“…Previous studies have explored the relationships among the climate, the hydrological conditions, and the precipitating evaporites during the MSC peak, based on the distributions of mineral phases and elements in the evaporites (Garcia-Veigas et al 1995;Lugli et al 1999;Yoshimura et al 2016), rhythmical alternation of the evaporitic sequences (Manzi et al 2012), chemistry of the fluid inclusions in halite crystals (Rigaudier et al 2011), and Os isotopic records (Kuroda et al 2016). By contrast, much less is known on the responses of the biological communities, partly because evaporites generally do not contain microfossils commonly used in biogeochemical studies (Bertini et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Biomarker records and mineral compositions of the Messinian halite and K–Mg salts from Sicily

Isaji

Yoshimura

Kuroda

et al. 2019

Prog Earth Planet Sci

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The evaporites of the Realmonte salt mine (Sicily, Italy) are important archives recording the most extreme conditions of the Messinian Salinity Crisis (MSC). However, geochemical approach on these evaporitic sequences is scarce and little is known on the response of the biological community to drastically elevating salinity. In the present work, we investigated the depositional environments and the biological community of the shale-anhydrite-halite triplets and the K-Mg salt layer deposited during the peak of the MSC. Both hopanes and steranes are detected in the shale-anhydrite-halite triplets, suggesting the presence of eukaryotes and bacteria throughout their deposition. The K-Mg salt layer is composed of primary halites, diagenetic leonite, and primary and/or secondary kainite, which are interpreted to have precipitated from density-stratified water column with the halite-precipitating brine at the surface and the brineprecipitating K-Mg salts at the bottom. The presence of hopanes and a trace amount of steranes implicates that eukaryotes and bacteria were able to survive in the surface halite-precipitating brine even during the most extreme condition of the MSC.

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Miocene to Pleistocene osmium isotopic records of the Mediterranean sediments

Abstract: In the late Miocene the Mediterranean Sea experienced a salinity crisis and thick sequences of evaporites precipitated across the deep and marginal basins.

Cited by 14 publications

References 78 publications

Characterization of sulfate mineral deposits in central Thailand

Characterization of sulfate mineral deposits in central Thailand

Evaluating Late Cretaceous OAEs and the influence of marine incursions on organic carbon burial in an expansive East Asian paleo-lake

Biomarker records and mineral compositions of the Messinian halite and K–Mg salts from Sicily

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