Source rejuvenation vs. re-heating: Constraints on Siberian kimberlite origin from U Pb and Lu Hf isotope compositions and geochemistry of mantle zircons

Agashev, A. M.; Chervyakovskaya, M. V.; Serov, I. V.; Толстов, А. В.; Agasheva, E. V.; Votyakov, S. L.

doi:10.1016/j.lithos.2020.105508

Cited by 13 publications

(14 citation statements)

References 44 publications

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“…Trace‐element chemistry was analyzed in 52 grains selected on the basis of morphology and texture (Supplementary 4). The obtained Y, U, Th, and ∑REE patterns, as well as Th/U and Ce/Nb ratios (Figure 7), are compared with compositional fields of different zircon types distinguished for the South African and Siberian cratons (Belousova et al, 2002), and separately for Siberia (Agashev et al, 2020; Sun et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

“…(a) Jurassic zircons, group 1; (b) Triassic and Middle Paleozoic zircons, group 1; (c) Jurassic and Ediacaran–Cambrian zircons, groups 2 and 3; (d) Late Carboniferous zircons, group 4. Color fields are value ranges for zircons from kimberlites and carbonatites based on published data (Agashev et al, 2020; Belousova et al, 2002; Doroshkevich et al, 2020; Rodionov et al, 2012; Sun et al, 2018). Patterns for average zircons from dolerites and lamproites are after Belousova et al, 2002.…”

Section: Resultsmentioning

confidence: 99%

“…Middle Paleozoic kimberlites with 369–342 Ma Rb‐Sr ages have been recorded in the Toluopka field within the Kyutyungde basin (Zaitsev & Smelov, 2010). Middle Paleozoic kimberlite magmatism also left abundant diamondiferous bodies in the Mirny, Alakit‐Markha, Daldyn, and Upper Muna fields of the Siberian craton (Agashev et al, 2020; Griffin et al, 1999; Sun et al, 2018; Zaitsev & Smelov, 2010).…”

Section: Discussionmentioning

confidence: 99%

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In search for primary sources of placer diamonds of northeast Siberian craton: Evidence from the U–Pb ages and geochemistry of alluvial zircons

et al. 2023

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The northeastern Siberian craton stores numerous placers of diamonds that differ in morphology and texture, and originate from different types of primary deposits, primarily kimberlites. Analyses of mantle zircons selected from samples of alluvial and coarse clastic sediments in the watersheds of the Olenek and Kyutyungde rivers in the Anabar‐Olenek subprovince of the Yakutian diamond province provide constraints on kimberlite magmatism events in the area. The new U–Pb ages and typical kimberlitic signatures of the Kyutyungde zircons trace‐element patterns reveal three main magmatic events that produced kimberlites: Middle Paleozoic (Late Devonian to Early Carboniferous), Jurassic and Triassic. The Jurassic zircons (177–149 Ma) are mainly related to kimberlites in the proximal Kuoika‐Molodo and Khorbusuon fields. Triassic zircons (240–221 Ma) were probably released during large‐scale erosion of the eastern Anabar shield, however, the presence of such zircons in the Kyutyungde area indicates that kimberlites of the respective magmatic stage may exist within the immediate vicinity of the area. The only Middle Paleozoic zircon sample (358.6 Ma, D3‐C1 boundary) may originate from a proximal kimberlite within the Kyutyungde area. The presence of Middle Paleozoic kimberlitic zircons, along with harzburgite–dunitic pyropes, indicates that the primary deposit of diamonds and related minerals may exist near or within the Kyutyungde area. Late Ediacaran–Early Cambrian (573–473 Ma) mantle zircons found in Early Cambrian conglomerates of the area, along with other mantle minerals including Cr spinel of a diamond assemblage, record another Precambrian event of potentially diamondiferous magmatism in the Kyutyungde basin.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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In search for primary sources of placer diamonds of northeast Siberian craton: Evidence from the U–Pb ages and geochemistry of alluvial zircons

et al. 2023

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“…Rare kimberlites contain several age populations of megacrystic mantle zircon (e.g., Agashev et al., 2020; Belousova et al., 2001; Zartman & Richardson, 2005), in which case only the youngest population documents the kimberlite emplacement age. Moreover, Shumlyanskyy et al.…”

Section: Discussionmentioning

confidence: 99%

“…Rare kimberlites contain several age populations of megacrystic mantle zircon (e.g., Agashev et al, 2020;Belousova et al, 2001;Zartman & Richardson, 2005), in which case only the youngest population documents the kimberlite emplacement age. Moreover, Shumlyanskyy et al (2021) reported that all mantle zircons from the Novolaspa kimberlites in the Ukrainian Shield predate the kimberlite emplacement age by several million years.…”

Section: Formation Of Desilicification Reaction Rims Relative To the ...mentioning

confidence: 99%

Desilicification Rims of Zircon Xenocrysts Record the Timing of Kimberlite Emplacement

Мельник

Korolev

et al. 2022

JGR Solid Earth

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Kimberlites are deep and relatively rare mantle‐derived igneous rocks, which provide key insights into the lithospheric mantle composition beneath continents (i.e., from the entrained mantle materials) at the time of magma emplacement. In addition, the temporal distribution of kimberlites throughout Earth's history may reveal secular changes in global geodynamics. However, alteration and abundant exotic material (i.e., xenoliths and xenocrysts) of different ages, both typical of kimberlites, often hinder reliable dating of these rocks. In this study, we investigated zircon xenocrysts and their replacement by desilicification reaction rims (DSRs), which consist mainly of baddeleyite, in the metamorphosed Kimozero kimberlites from the Karelian Craton, Russia. Similar DSRs have been identified previously on mantle‐derived zircons in numerous kimberlites, but the precise timing and location of formation of these rims remain unclear. U–Pb isotope dating of mantle zircon xenocrysts in the Kimozero kimberlites indicates that these rocks were emplaced at ca. 1.97 Ga. DSRs with similar textures and baddeleyite chemistry occur on both the 1.97 Ga mantle and 2.70–2.38 Ga crustal zircon xenocrysts in these kimberlites. Pb–Pb isotope dating of the DSRs yields the same age (i.e., ca. 1.97 Ga) as the mantle zircons. The data constrain the formation of DSRs to crustal levels and, more importantly, indicate that these rims record the timing of kimberlite emplacement. Therefore, we suggest that such baddeleyite reaction rims are a new and promising material for kimberlite geochronology.

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The evolution of diamond-forming fluids indicating a pre-kimberlitic metasomatic event in the mantle beneath the Mirny field (Siberian craton)

Gubanov

Zedgenizov

2023

Contrib Mineral Petrol

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Source rejuvenation vs. re-heating: Constraints on Siberian kimberlite origin from U Pb and Lu Hf isotope compositions and geochemistry of mantle zircons

Cited by 13 publications

References 44 publications

In search for primary sources of placer diamonds of northeast Siberian craton: Evidence from the U–Pb ages and geochemistry of alluvial zircons

In search for primary sources of placer diamonds of northeast Siberian craton: Evidence from the U–Pb ages and geochemistry of alluvial zircons

Desilicification Rims of Zircon Xenocrysts Record the Timing of Kimberlite Emplacement

The evolution of diamond-forming fluids indicating a pre-kimberlitic metasomatic event in the mantle beneath the Mirny field (Siberian craton)

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