The Precambrian drift history and paleogeography of Baltica

Salminen, Johanna; Lehtonen, Elina; Mertanen, S.; Pesonen, L. J.; Elming, Sten-åke; Luoto, Toni

doi:10.1016/b978-0-12-818533-9.00015-1

Cited by 11 publications

(3 citation statements)

References 278 publications

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“…Previous paleomagnetic data place the Kola and neighboring Karelia cratons at polar latitudes at 2.7 Ga, between 60°N and 90°N (Fig. 4;Salminen et al, 2021). Thus, our study documents 2.67 Ga precipitation at high latitudes, where precipitation must have exhibited the strongest 18 O depletions (Dansgaard, 1964).…”

Section: Paleoclimate Implicationssupporting

confidence: 73%

Quantitative record of the Neoarchean water cycle from a 2.67 Ga magmatic-hydrothermal system, Fennoscandian Shield

Zakharov

Zozulya

Colon

2023

Geology

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Given the scarcity of reliable paleoclimate record, the surface temperatures of the first half of Earth’s history remain poorly constrained. Here we show how the climate-sensitive δ18O value of surface precipitation recorded in Archean igneous and hydrothermal formations can help to resolve the state of early Earth climate. The Keivy complex, Kola craton (Fennoscandian Shield), formed via the intrusion of granitic and mafic magmas in the shallow crust at 2.67 Ga, where circulation of meteoric water created a distinct archive of the contemporaneous water cycle. Using whole rock data, mineral separates, and in situ zircon δ18O measurements, we disentangle the reaction mechanisms between the shallow magma and local precipitation. Syn-emplacement hydrothermal alteration produced near-contact lithologies with δ18O values as low as –8‰ recorded in amphiboles, while igneous zircons from granites crystallized from melts with δ18O from +1‰ to +4.5‰. High-precision U-Pb geochronology constrains the granite intrusion at 2673.5 ± 0.3 Ma. Using the Δ17O approach, these rocks reveal that the precipitation had a δ18O value 18‰ lower than the hydrosphere, providing one of the earliest quantitative records of continental precipitation generally compatible with a cold climate at high latitudes.

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Section: Paleoclimate Implicationssupporting

confidence: 73%

Quantitative record of the Neoarchean water cycle from a 2.67 Ga magmatic-hydrothermal system, Fennoscandian Shield

Zakharov

Zozulya

Colon

2023

Geology

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“…S1 ). Recent paleomagnetic compilations were used to reconstruct the position of Baltica 72 . We still acknowledge some uncertainty concerning the position of the North China Craton relative to Siberia, where paleomagnetic data rather suggest a separation of the two, whereas geological evidence suggest a closed configuration 3 (Supplementary Table S2 ).…”

Section: Methodsmentioning

confidence: 99%

Metamorphic turnover at 2 Ga related to two-stage assembly of Columbia

Volante,

Kirscher

2024

Sci Rep

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Understanding the stabilization of cratons and how this is related to the onset of plate-tectonics is among the most important questions in geoscience. The assembly of Earth’s first supercontinent Columbia represents the first lines of evidence for a global subduction network, when the oldest, deep subduction-related rocks have been reported. We combine the low-, intermediate- and high-T/P global metamorphic record with the two-stage assembly of the Nuna-Columbia supercontinent to address the significance of the oldest “cold” rocks (low-T/P) and the related emergence of bimodal metamorphic belts. For this purpose, we analyse two examples from Laurentia (including Greenland) and Australia between 2.0–1.8 Ga and 1.8–1.6 Ga. Two main observations are: (i) a first-stage (2.0–1.8 Ga) amalgamation of the megacontinent Nuna (precursor to Columbia) is characterized by bimodal metamorphism along major mobile belts suturing the megacontinent’s center. In contrast, a second-stage (1.8–1.6 Ga) is dominated by the formation of soft collisional orogens during the final Columbia supercontinent assembly, recording intermediate- to high-T/P metamorphism; (ii) the metamorphic signature of the two assembly stages, featuring low- and intermediate-T/P rocks during Nuna assembly followed by their near absence during Columbia amalgamation, contrasts with the thermobaric ratios recorded by the Phanerozoic Gondwana-Pangea assembly, where intermediate and low-T/P rocks dominated the final stage of Pangea amalgamation. This discrepancy may signify substantial changes in intraplate metamorphism and minor rearrangements during Columbia assembly compared to major continent–continent collisions, such as the Appalachian-Variscan Orogen as well as production and fast exhumation of high- to ultra-high-pressure rocks during the assembly of the supercontinent Pangea. Furthermore, the variation of thermobaric ratios aligns with the concept of a two-stage mega-supercontinent formation, emphasizing differences between the potentially oldest and youngest supercontinent cycles.

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“…1, б). Об этом же свидетельствуют более современные реконструкции [Kirscher et al, 2020;Evans, 2021;Elming et al, 2021;Salminen et al, 2021;Li et al, 2023], подтверждающие, что эти кратоны существовали рядом друг с другом на протяжении около 800 млн лет [Pisarevsky et al, 2008]. В настоящее время ключевым вопросом для современных реконструкций является то, какой из кратонных блоков мог быть присоединен к западной части Сибирского кратона на стадии формирования Родинии.…”

Section: обсуждение и геотектоническиеunclassified

Early Neoproterozoic Granitoids in the Ryazanovsky Massif of the Yenisei Ridge as Indicators of the Grenville Orogeny at the Western Margin of the Siberian Craton

Nozhkin,

Turkina,

Likhanov

et al. 2024

Geodin. tektonofiz.

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Studies of the geological history of the Yenisei Ridge are important not only for understanding the tectonic evolution of mobile belts at the boundaries of ancient cratons but also for problem solving whether the Siberian craton was a part of the Rodinia supercontinent. The mineralogical-petrological, geochemical and isotope-geochronological studies yielded new data on the petrogeochemical composition, petrogenesis features, U-Pb age of zircon, and Sr and 147Sm-143Nd isotopic parameters for the rocks of the Ryazanovsky granitoid massif located near the Yenisei fault zone of the Yenisei Ridge. These rocks are represented by high-ferruginous peraluminous varieties and are comparable to A-granites or highly differentiated I-granites. Their composition evolves from normal to subalkaline granites and leucogranites, characterized by increased concentrations of highly charged and radioactive elements. Isotopic (Sr, Nd) characteristics of the rocks indicate generation from an ancient crustal substrate, the average age of which corresponds to the Paleoproterozoic. The formation of these granites at the Meso-Neoproterozoic boundary (1013±9.9 Ma) corresponds to the early stage of the Grenville orogeny and the formation time of the structure of the Rodinia supercontinent. This episode of regional crustal evolution is correlated with the synchronous successions and similar style of tectonothermal events on the periphery of large Precambrian cratons (Laurentia and Baltica), thus confirming the reliability of the proposed paleocontinental reconstructions of incorporation of the Siberian craton into the Rodinia.

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The Precambrian drift history and paleogeography of Baltica

Cited by 11 publications

References 278 publications

Quantitative record of the Neoarchean water cycle from a 2.67 Ga magmatic-hydrothermal system, Fennoscandian Shield

Quantitative record of the Neoarchean water cycle from a 2.67 Ga magmatic-hydrothermal system, Fennoscandian Shield

Metamorphic turnover at 2 Ga related to two-stage assembly of Columbia

Early Neoproterozoic Granitoids in the Ryazanovsky Massif of the Yenisei Ridge as Indicators of the Grenville Orogeny at the Western Margin of the Siberian Craton

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