Anticlockwise metamorphic paths at ca. 890–790 Ma from the NE Baidrag block, Mongolia, indicate back-arc compression at the Rodinia periphery

Štípská, Pavla; Peřestý, Vít; Soejono, Igor; Schulmann, Karel; Andrew, R.C. Kylander–Clark; Aguilar, Carmen; Collett, Stephen; Ráček, Martin; Míková, Jitka; Otgonbaatar, D.; Nikol, Novotná

doi:10.1016/j.gsf.2022.101520

Cited by 8 publications

(8 citation statements)

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“…The U–Pb isotopic data from two samples, PV256 and PV274, were previously reported in Štípská et al. (2023). Details of the analytical procedure are given in Appendix S1; U–Pb and Lu–Hf isotopic data are given in Appendix S2; cathodoluminescence images of analysed zircons and spot localizations are given in Appendix S3.…”

Section: Methods and Resultsmentioning

confidence: 67%

“…For sample PV274, these Neoproterozoic dates were recorded in structure‐less CL‐dark zircon rims characterized by low Th/U ratios (<0.11; n = 44, Figure 3a); as previously discussed in Štípská et al. (2023), these zircon rims likely reflect growth during a Tonian metamorphic event. Considering only detrital zircon, this sample is characterized by a few Neoarchean dates (2778–2469 Ma) and maxima at c .…”

Section: Methods and Resultsmentioning

confidence: 99%

“…Sample IS192 was clearly deposited later, as evidenced by detrital igneous zircons of Neoproterozoic age. The depositional age of this sample is bracketed by the youngest zircon population (c. 750 Ma, Figure 2) and the onset of a regional Ediacaran-early Cambrian metamorphism (Kozakov et al, 2006;Štípská et al, 2023). Original stratigraphic relationships are obscured by poly-deformation related to this metamorphic (Demoux, Kröner, Liu, et al, 2009).…”

Section: Discussionmentioning

confidence: 97%

“…Ba, Barguzin; Bd, Baidrag; Ere, Ereendavaa; Erg, Erguna; Ol, Olkhon; Ta, Tarbagatay; TM, Tuva‐Mongol; Zv, Zavkhan. (b) Simplified geological map of the NE margin of the Baidrag Block (after Štípská et al., 2023) with the location of the studied samples. [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Geological Settingmentioning

confidence: 99%

“…However, Štípská et al. (2023) also documented a cryptic Tonian ( c . 890–790 Ma) metamorphism at similar metamorphic conditions.…”

Section: Geological Settingmentioning

confidence: 99%

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Mongolian micro‐continental blocks in Columbia/Nuna: Zircon U–Pb–Hf isotopic evidence for long‐lasting Mongolia–Western Siberia connection

Collett,

Soejono,

Peřestý

et al. 2023

Terra Nova

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The Mongolian micro‐continental fragments play an important geodynamic role in the Palaeozoic evolution of the Central Asian Orogenic Belt. However, the original provenance of individual blocks within the Nuna/Columbia and Rodinia supercontinents is not well constrained. In this work, we present zircon U–Pb and Lu–Hf isotopic data from the Mesoproterozoic to Neoproterozoic metamorphosed cover of the Baidrag Block in central Mongolia. These data reveal important maxima in the Neoarchean, Palaeoproterozoic and locally Neoproterozoic. Although the majority of the new data can be attributed to local sources within the basement of the Mongolian micro‐continental fragments, an important contribution of juvenile 2.0 Ga zircons is linked to the western margin of the Siberian Craton, and 1.5 Ga zircons are either directly derived from North Australia or indirectly recycled from sediments in NW Laurentia.

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Section: Methods and Resultsmentioning

confidence: 67%

Section: Methods and Resultsmentioning

confidence: 99%