Isotopic-geochemical features and age of zircons in dunites of the platinum-bearing type Uralian massifs: Petrogenetic implications

Lead isotopic systematics of massive sulphide deposits in the Urals: Applications for geodynamic setting and metal sources

“…8A). This age coincides with oldest Neoarchaean (2,781 ± 56 Ma) ages established for the zircons extracted from some of the Urals peridotites (Malitch et al, 2009;Fershtater et al, 2009 Fig. 3) imply that the lead was mainly derived from ore-hosting rocks, in agreement with a recycling model.…”

“…It has been suggested that these fragments have been rifted and transported thousands of kilometres away from the source continent (Buys et al, 2014). The possibility of this scenario in Urals is indirectly confirmed by the presence of old zircons within peridotite massifs (e.g., Malitch et al, 2009;Fershtater et al, 2009). …”

“…Archean and Proterozoic zircons have also been extracted from Urals peridotites (e.g., dunites within a number of dunite-clinopyroxenite massifs), with U-Pb ages ranging from Neoarchaean (2,781 ± 56 Ma), Paleoproterozoic (2,487 ± 33 Ma and 1,881 ± 9 Ma), Mesoproterozoic (1,172 ± 9.8 Ma) to MidPaleozoic (414.8 ± 3.9 -473 ± 3.7 Ma), reflecting the multistage formation history of the Uralian Platinum Belt (Malitch et al, 2009;Fershtater et al, 2009). These Archaean zircons are consistent with source from the East-European craton, or, more precisely, from Volga-Uralia block, adjacent to the Urals orogenic belt, which has been formed as a result of the Neoarchean plume event at 2.74-2.6…”

LA ICP MS U–Pb ages of detrital zircons from Russia largest rivers: Implications for major granitoid events in Eurasia and global episodes of supercontinent formation

“…Proterozoic U-Pb ages have been recorded in the cores of metamorphic zircons of the Kokchetav Massif (Claoue-Long et al, 1991;Letnikov et al, 2001;Hermann et al, 2006;Kroner et al, 2007). Besides Necheukhin et al (2000) and Fershtater et al (2009) reported about Paleo-and Mesoproterozoic ages of zircons from small continental blocks or terranes in the southeastern Urals. As far as the Ob' spectrum contains many Archean ages, 10% of the dataset, we suggest that the primary oldest rocks in the Ob' basin can be found either in the southeastern Urals and/or in North Kazakhstan; the latter region hosts the oldest cratonal block, Kazakhstan, in the region exposed.…”

Polygenesis of mafic–ultramafic complexes: Isotope-geochronological and geochemical evidence from zircons of the Berezovka massif rocks (Sakhalin Island)

“…In recent time, an advance in this field has been made owing to the elaboration of methods for dating zircon grains with application of high-resolution secondary-ion mass spectrometers (SHRIMP-II). Today, these methods are used for isotope dating of not only zircons from granitoids (Rudnev et al, 2012), alkaline igneous rocks (Vrublevskii et al, 2014), and metamorphic rocks (Turkina et al, 2014) but also zircons from gabbroids (Bortnikov et al, 2008;Krasnobaev et al, 2007;Ledneva et al, 2012;Skolotnev et al, 2010;Tsukanov and Skolotnev, 2010) and ultramafites (Badanina and Malich, 2012;Fershtater et al, 2009;Knauf, 2008;Lesnov et al, 2010;Malitch et al, 2009;Oh et al, 2012;Ronkin et al, 2013).…”