REE + Y distribution in Tremadocian shelly phosphorites (Toolse, Estonia): Multi-stages enrichment in shallow marine sediments during early diagenesis

Graul, Sophie; Kallaste, Toivo; Pajusaar, Siim; Urston, Kritsjan; Gregor, Andre; Moilanen, Marko; Ndiaye, Mawo; Hints, Rutt

doi:10.1016/j.gexplo.2023.107311

Journal of Geochemical Exploration

2023

DOI: 10.1016/j.gexplo.2023.107311

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REE + Y distribution in Tremadocian shelly phosphorites (Toolse, Estonia): Multi-stages enrichment in shallow marine sediments during early diagenesis

Sophie Graul,

Toivo Kallaste,

Siim Pajusaar

et al.

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Cited by 2 publications

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Paleoenvironmental reconstruction of the Neoproterozoic Mudador Marble, Passo Feio Complex, Dom Feliciano Belt, southern Brazil

de Oliveira,

Koester,

Porcher

et al. 2025

Journal of South American Earth Sciences

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Paleoenvironmental reconstruction of the Neoproterozoic Mudador Marble, Passo Feio Complex, Dom Feliciano Belt, southern Brazil

de Oliveira,

Koester,

Porcher

et al. 2025

Journal of South American Earth Sciences

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The Paleoecological Environment during the Ediacaran–Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes

Gao,

Yang,

Gao

et al. 2024

Minerals

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During the Ediacaran–Cambrian transition, a series of stratal continuous and well-preserved siliceous rock and phosphorite assemblages developed in Qingzhen, Guizhou Province, China, facilitating research on the biological evolution, marine chemistry, and palaeoecological environment of this period. Therefore, we investigated the paleontology, trace and rare earth elements, total organic carbon, total sulfur content, and Zn isotopes of the phosphorus-bearing rock series in the Taozichong Formation of the Cambrian period in Qingzhen. Geochemical analysis reveals that the sedimentary rocks in this area were formed in the oxygen-rich seawater environment and were not affected by high-temperature hydrothermal activity. The upwelling ocean current provided abundant rare earth elements and other nutrient elements, as well as conditions for the prosperity of biota in Qingzhen. In addition, the δ66Zn value (−0.21‰–0.41‰ range and 0.17‰ mean) in the Qingzhen phosphorous rock series was much lower than that in seawater, indicating a strong level of biological productivity. The variation trend of δ13C, δ18O, and δ66Zn exhibited four stages and three obvious drift events. The results suggest that climate change during this period led to the intermittent flourishing and extinction of organisms, which triggered the negative drift of δ13C and δ18O in the ocean, resulting in a coordinated response of δ66Zn. The unique ecological environment of the Taozichong Formation in Qingzhen also provides favorable conditions for the population continuation of Ediacaran-type benthic soft-bodied metazoon dominated by discoid fossils, Shaanxilithes, worm fossils, and sponge fossils in the Cambrian strata, as well as participation in the global biological explosion events. The study area provides new insights for rebuilding the global Ediacaran–Cambrian ecosystem during the transition period.

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REE + Y distribution in Tremadocian shelly phosphorites (Toolse, Estonia): Multi-stages enrichment in shallow marine sediments during early diagenesis

Cited by 2 publications

References 98 publications

Paleoenvironmental reconstruction of the Neoproterozoic Mudador Marble, Passo Feio Complex, Dom Feliciano Belt, southern Brazil

Paleoenvironmental reconstruction of the Neoproterozoic Mudador Marble, Passo Feio Complex, Dom Feliciano Belt, southern Brazil

The Paleoecological Environment during the Ediacaran–Cambrian Transition in Central Guizhou Province, China: Evidence from Zn Isotopes

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