980-970 Ma Sette-Daban event of the Siberian craton: new geochronological and geochemical data, relationship to LIP and potential connection with other LIPs

ABSTRACT

The paper presents new geological, geochronological, geochemical and Nd-Sr isotopic data on the Meso- Neoproterozoic dolerites of the Siberian Craton. New U-Pb baddeleyite and apatite ages of a E-W-trending dyke and two sills from southeastern Siberia are 982 ± 11, 977 ± 7, 970 ± 31 and 972 ± 60 Ma, respectively, extending the area of distribution of the event by more than 100 km to the north. The Sette-Daban intrusions are subalkalic mostly low-Ti dolerites, although high-Ti dolerites have been locally documented as well. Trace element abundances in dolerites vary from typical to E-MORB to OIB with arc-like signatures represented by high Th/Yb and low TiO₂/Yb ratios. All dolerite samples display moderately positive εNd(t) values varying from +3.3 to +7.7 and indicating the magmas were derived from a depleted mantle source. E-MORB and OIB intrusions are attributed to the different degree of interaction of magma between the depleted asthenospheric mantle and regions within the sub-continental lithospheric mantle (SCLM) that were metasomatically enriched during earlier subduction events. Available data on Sette-Daban event distribution, composition and duration satisfy the characteristics of a typical Large Igneous Province (LIP). Similar age 1000–950 Ma mafic magmatism is also recognized in the Baltic and Amazonian cratons and can be potentially correlated with the Sette-Daban event.

KEYWORDS:

• Siberian craton
• Sette-daban event
• large igneous province
• meso-neoproterozoic
• U-Pb geochronology
• geochemistry

Acknowledgments

We are grateful to Galina Kazakova from All-Russian Geological Research Institute of A. P. Karpinsky for research materials support. The research by A. Savelev, S. Malyshev and A. Pazukhina was supported by grant No. 19-77-10048 from the Russian Science Foundation, and research by A. Prokopiev was supported by DPMGI SB RAS (FUFG-2024-0005) and grant No. 20-17-00169 from the Russian Science Foundation. U-Pb geochronology was partially funded by Canadian NSERC Grant CRDPJ 523131-17; PI is Ernst) in connection with the global Large Igneous Provinces Consortium (www.supercontinent.org). The constructive comments by two anonymous reviewers are gratefully acknowledged.

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/00206814.2024.2349899

Additional information

Funding

The work was supported by the Canadian NSERC Grant [CRDPJ 523131-17]; DPMGI SB RAS [FUFG-2024-0005]; Russian Science Foundation [19-77-10048, 20-17-00169].