δ18O composition of conodont apatite indicates climatic cooling during the Middle Pridoli

Žigaitė, Živilė; Joachimski, Michael M.; Lehnert, Oliver; Brazauskas, Antanas

doi:10.1016/j.palaeo.2010.03.033

Cited by 47 publications

(17 citation statements)

References 18 publications

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“…Besides the application of ichthyoliths in thermal maturity studies (Supplementary material 3), their colour is a useful indication whether oxygen and strontium isotope composition is unaffected by diagenesis and can still serve as an archive for palaeotemperature, salinity and for strontium isotope chronostratigraphy (Johns et al, 2012;Ţigaitė et al, 2010).…”

Section: Colour Alteration and Mineralogical Changes Of Ichthyoliths mentioning

confidence: 99%

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Hartkopf‐Fröder

Königshof

Littke

et al. 2015

International Journal of Coal Geology

152

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Section: Colour Alteration and Mineralogical Changes Of Ichthyoliths mentioning

confidence: 99%

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Hartkopf‐Fröder

Königshof

Littke

et al. 2015

International Journal of Coal Geology

152

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“…In addition, some other previous studies dealing with comparative anatomy (Turner ), isotopic data (Žigait≐ et al . ; Fadel et al . ) and the sedimentology and taphonomy of several thelodont localities (Turner ; Märss et al .…”

mentioning

confidence: 99%

Patterns of ecological diversification in thelodonts

et al. 2018

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Here we explore the spatial, temporal and phylogenetic patterns of ecological diversification for the entire clade of thelodonts, one of the earliest groups of vertebrates and longest lasting of the Palaeozoic agnathans in the fossil record. Parsimony and maximum‐likelihood methods are used to reconstruct ancestral states of their geographical distributions, habitats and lifestyles. Our results support the concept that thelodonts originated during the Middle?–Late Ordovician probably in marine open waters of Laurasia, with a demersal lifestyle on hard substrates being the ancestral condition for the whole clade. Later, thelodonts underwent a complex ecological diversification and palaeobiogeographical history, comparable in many aspects to those of some major groups of living fishes. Different modes of life evolved repeatedly and a wide range of habitats were colonized by distinct groups, including deep waters and brackish marine and/or freshwater environments. Diadromous strategies presumably appeared on nine different occasions. The palaeobiogeographical history of thelodonts reveals significant differences in the dispersal potential of some major groups. Dispersal of thelodontiforms entailed displacements over long distances and the crossing of deep‐water biogeographical barriers, whereas those of furcacaudiforms were always limited to areas interconnected by shallow platforms. We propose that the evolution of pelagic larval stages in thelodontiforms might explain this biogeographical pattern and could satisfactorily account for the greater evolutionary success of this group.

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“…In most cases, the curves reconstructed from rocks broadly follow the brachiopod values (Balaban, 2007;Cramer, Kleffner, et al, 2010;Kaljo et al, 2001). In the present study, we used the more continuous mudstone samples for the analysis instead of brachiopods, under the assumtion that these According to the Palaeozoic δ 13 C and δ 18 O curves recorded from different palaeocontinents (Azmy et al, 1999;Cramer, Loydell, et al, 2010;Cramer, Kleffner, et al, 2010;Lehnert et al, 2007;Lehnert, Männik, Joachimski, Calner, & Frýda, 2010;Žigaitė et al, 2010), three (Ruban, 2013). The global change since the early Telychian stage was associated with biotic extinction events, including conodonts, graptolites, and trilobitesp (Kaljo et al, 2001;Loydell, 2007;Ruban, 2013;.…”

Section: δ 13 C-δ 18 O Isotopesmentioning

confidence: 98%

“…E. Johnson, Baarli, Nestor, Rubel, & Worsley,, & D., 1991;Lehnert et al, 2007;Munnecke et al, 2010;X. Zhang, Liu, Wang, et al, 2018;Žigaitė, Joachimski, Lehnert, & Brazauskas, 2010). But the relationship between sea-level change and stable isotope geo-chemistry is still poorly understood, especially the relationship between isotope excursions and extinction events .…”

Section: Sea-level Changementioning

confidence: 99%

“…However, it is important to be aware that the principles mentioned above are established under the assumption that carbon and oxygen isotopes have not been subject to strong diagenetic reactions during the long burial history. Fossil carbonate shells, for example, brachiopods and conodont elements, are more commonly used for δ 13 C and δ 18 O testing (Azmy et al, 1999;Lehnert et al, 2007;Samtleben, Munnecke, Bickert, & Pätzold, 1996;Samtleben, Munnecke, Bickert, & Pätzold, 2001;Žigaitė et al, 2010).…”

Section: δ 13 C-δ 18 O Isotopesmentioning

confidence: 99%

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The Silurian red beds of Tarim Basin: Signals of palaeoenvironment, palaeoclimate, and sea‐level change

Liu

Lin

et al. 2019

Geological Journal

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The Silurian red beds of the Tarim Basin were formed in a coastal tidal and fluvial delta environment. They consist of red mudstone layers of the lower Tataaiertag Formation and separate the grey-green muddy sandstones of the Kalpintag Formation from the red sandstones of the upper Tataaiertag Formation. These mudstones are regarded as the most important regional seal for Silurian oil reservoirs. They contain a significant record of palaeoenvironmental and palaeoclimate changes which is related to global sea-level changes. Based on a systematic and continuous sedimentary study and multiple geochemistry analyses of samples taken from the Sishichang outcrop profile in west of the Tarim Basin, the Early-Middle Silurian palaeoclimate and sea-level curve have been reconstructed. The Early-Middle Silurian Tarim Basin encountered five intervals of climate change, from humid transitioning to semi-humid and dry-hot climate which shows signs of generally increasing oxidation. The reconstructed sea-level curve indicates five sea-level cycles throughout the Early-Middle Silurian succession. The most significant sea-level drop occurred during the early Telychian stage, which represents the onset of the red mudstone section of the Tataaiertag Formation. This new sealevel curve shows some differences compared with the earlier proposed global sealevel curves. The dry-hot climate occurred during the late Telychian stage and the beginning of Wenlock age. The Early-Middle Silurian sea-level change of the TarimBasin was mostly synchronical to the eustacy. However, regional tectonic activities during the early Telychian stage further enhanced the effect of the global sea-level fall and lead to a dry-hot climate trend which also caused the creation of the red beds of the Silurian period.

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δ18O composition of conodont apatite indicates climatic cooling during the Middle Pridoli

Cited by 47 publications

References 18 publications

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Optical thermal maturity parameters and organic geochemical alteration at low grade diagenesis to anchimetamorphism: A review

Patterns of ecological diversification in thelodonts

The Silurian red beds of Tarim Basin: Signals of palaeoenvironment, palaeoclimate, and sea‐level change

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