Earliest Cretaceous (late Berriasian) glendonites from Northeast Siberia revise the timing of initiation of transient Early Cretaceous cooling in the high latitudes

Rogov, Mikhail; Ershova, Victoria; Shchepetova, E. V.; Захаров, В. А.; Pokrovsky, B. G.; Khudoley, A. K.

doi:10.1016/j.cretres.2016.11.011

Cited by 50 publications

(30 citation statements)

References 44 publications

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“…Our data on the morphology, internal structure, mineralogy, and isotopic composition of Lower Ordovician anthraconites of the Baltic paleobasin reveal many similarities to glendonites. Glendonites are usually found in terrigenous sediments, ranging from mudstones to sandstones ( [31][32][33][34], amongst others), while modern ikaite crystals are known from muddy deposits [35] and organic-rich sediments [36,37].…”

Section: Discussionmentioning

confidence: 99%

Glendonite-Like Carbonate Aggregates from the Lower Ordovician Koporye Formation (Russian Part of the Baltic Klint): Detailed Mineralogical and Geochemical Data and Paleogeographic Implications

et al. 2019

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Stellate and plate-like carbonate bodies, traditionally called anthraconites, are found throughout the Baltic-Ladoga Klint in bituminous shale of the Koporye Formation (Tremadocian, Lower Ordovician). Although this time interval is usually considered as a greenhouse, there is some evidence for the existence of at least temporary cold conditions during the Cambrian–Ordovician. However, the origin of anthraconites is still strongly debated. We studied the mineralogical, petrographic, cathodoluminescence, geochemical, and isotopic characteristics of anthraconites from five sections of the Russian part of the Baltic paleobasin. A close similarity between the morphological, petrographic, cathodoluminescence, and isotopic characteristics of the studied anthraconites with those of glendonites allow us to suggest that these bodies formed in a similar paleo-environment and should be considered as pseudomorphs of the mineral ikaite. The oxygen and carbon isotope ratios reveal that ikaite precipitation occurred in low-temperature conditions on the seafloor. The carbon isotopic values reveal influence of inorganic seawater carbon along with organic matter decomposition and/or methane oxidation during ikaite-glendonite transformations. The oxygen isotopic composition significantly changed after deposition due to meteoric diagenesis. We propose that the studied Tremadocian anthraconites formed under a region of upwelling, where cold phosphate-rich deep waters rose to the relatively shallow part of the Baltic paleobasin, providing favorable conditions for ikaite precipitation. Based on our cathodoluminescence study, we suggest that ikaite was transformed to calcite over several stages during diagenesis. Mineralogical studies also reveal that primary calcite was transformed to sulfate (gypsum) or dolomite during late superimposed processes.

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Section: Discussionmentioning

confidence: 99%

Glendonite-Like Carbonate Aggregates from the Lower Ordovician Koporye Formation (Russian Part of the Baltic Klint): Detailed Mineralogical and Geochemical Data and Paleogeographic Implications

et al. 2019

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“…Glendonites are not informative of sedimentary environments. They have been reported from lacustrine and littoral to bathyal (~ 4000 m) environments, springs, melted sea ice and even caves 13 . Generally, ikaite precipitation is favoured by elevated alkalinity, dissolved phosphate in pore waters, and its formation is often associated with organic-rich marine sediments, where methane oxidation can take place.…”

Section: Constraining Ikaite Vs δ 18 O [Phosphate] For the Reconstrumentioning

confidence: 99%

“…Modern glendonites typically show a much broader range in carbon isotope values (from +10 to -40‰; 3, 10-13 ( Fig. 4), which are strongly dependent on the depositional environment: the extremely negative δ 13 Oxygen isotopes derived from glendonites should not be used for palaeotemperature purposes. As the ikaite → calcite transition results in a 68.6% volume loss, related to the release of structural water from the original ikaite crystal 12 , the resulting glendonite is controlled by pseudomorphic transformation into calcite and subsequent porosity occlusion by calcite mosaics, with different oxygen and carbon isotopic compositions than the original ikaite 9 .…”

Section: Isotope Data From Glendonitesmentioning

confidence: 99%

Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitude

Попов

Álvaro

Holmer

et al. 2018

Preprint

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The Tremadocian (Early Ordovician) is currently considered a time span of greenhouse conditions with tropical water surface temperature estimates, interpolated from oxygen isotopes, approaching 40°C. In the high-latitude Baltoscandian Basin, these data are in contrast with the discovery of glendonite, a pseudomorph of ikaite (CaCO3·6H2O) and valuable indicator of near-freezing bottom-water conditions. The massive precipitation of this climatically sensitive mineral is associated with transgressive conditions and high organic productivity. Surprisingly, the precipitation of glendonite is contemporaneous with the record of conodonts displaying low δ18O values, which would suggest high temperatures (>40°C) in the water column. Therefore, the early Tremadocian sediments of Baltoscandia contain both “greenhouse” pelagic signals and near-freezing substrate indicators. This apparent paradox suggests both the influence of isotopically depleted freshwater yielded by fluvial systems, and the onset of sharp thermal stratification patterns in a semi-closed basin, which should have played an important role in moderating subpolar climates and reducing latitudinal gradients.

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“…Для позднего мела перспективные палеоклиматические реконструкции были получены с использованием данных по морфологии листьев ископаемых покрытосеменных растений (Herman, spicer, 1997;Herman et al, 2002;герман, 2004;spicer, Herman, 2010). Благодаря новым находкам удалось уточнить особенности стратиграфического и географического распространения юрских и меловых глендонитов в Арктике (Захаров и др., 2010; rogov, Zakharov, 2010;rogov et al, 2017;morales et al, 2017). Несмотря на то, что часть факторов, контролирующих распространение глендонитов, остается предметом дискуссий (Zhou et al, 2015;morales et al, 2017;Qu et al, СТРАТИгРАфИя.…”

unclassified

“…Несмотря на то, что часть факторов, контролирующих распространение глендонитов, остается предметом дискуссий (Zhou et al, 2015;morales et al, 2017;Qu et al, СТРАТИгРАфИя. гЕОлОгИчЕСКАя КОРРЕляцИя том 27 № 4 2019 2017; stockmann et al, 2018), общепризнаны их приуроченность к холодноводным обстановкам и то, что исходным минералом для образования глендонитов является икаит (Grasby et al, 2017;rogov et al, 2017;vickers et al, 2018). В дополнение к полученным в последнее время новым данным по палеоклиматам, М.А.…”

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Marine reptiles and climates of the Jurassic and Cretaceous of Siberia

et al. 2019

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All available data on the Jurassic and Cretaceous climates of Siberia, based on isotope, palaeontological and lithological markers are summarized. Late Pliensbachian cooling, early Toarcian warming, followed by late Toarcian to Middle Jurassic cooling and long-term Late Jurassic warming are well-recognized. Gradual cooling started since the late Ryazanian and continued during the whole Early Cretaceous except the short early Aptian warming event. At the beginning of the Late Cretaceous climate became warmer with warming peak at the Cenomanian–Turonian transition. During the middle and late Turonian climate became colder. During the Coniacian–Campanian time interval climate became warmer, but at the end of the Campanian new cooling event occurred. New records of marine reptiles from the Toarcian, Kimmeridgian, Volgian and Santonian–Campanian of the north of Eastern Siberia are described. All data concerning marine reptile occurrences in the Jurassic and Cretaceous of Siberia are reviewed; these records (from 51 localities) are mostly located at high palaeolatitudes. The analysis has revealed that most of the localities containing fossil reptile remains were llocated in the Transpolar palaeolatitudes (70°–87°). There are no direct relationship between climate oscillations and distribution of these animals. Taking into account recent data arguing that nearly all groups of the Jurassic and Cretaceous big marine reptiles were able to maintain constant body temperature and also were capable make long-range seasonal migrations, any conclusions concerning usage of these animals as markers of warm climate should be treated with a caution.

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Earliest Cretaceous (late Berriasian) glendonites from Northeast Siberia revise the timing of initiation of transient Early Cretaceous cooling in the high latitudes

Cited by 50 publications

References 44 publications

Glendonite-Like Carbonate Aggregates from the Lower Ordovician Koporye Formation (Russian Part of the Baltic Klint): Detailed Mineralogical and Geochemical Data and Paleogeographic Implications

Glendonite-Like Carbonate Aggregates from the Lower Ordovician Koporye Formation (Russian Part of the Baltic Klint): Detailed Mineralogical and Geochemical Data and Paleogeographic Implications

Glendonite occurrences in the Tremadocian of Baltica: first Early Palaeozoic evidence of massive ikaite precipitation at temperate latitude

Marine reptiles and climates of the Jurassic and Cretaceous of Siberia

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