Contents lists available at ScienceDirect Precambrian Research journal homepage: www.elsevier.com/locate/precamres Multi-stage modification of Paleoarchean crust beneath the Anabar tectonic province (Siberian craton) V.S. Shatsky a,b,c, ⁎ , V.G. Malkovets a,c,d,e , E.A. Belousova d , I.G. Tretiakova a,d , W.L. Griffin d , A.L. Ragozin a,c , Q. Wang f , A.A. Gibsher a , S.Y. O'Reilly d a Sobolev Institute of Geology and Mineralogy, Koptyuga 3, Novosibirsk 630090, Russia b Vinogradov Institute of Geochemistry SB RAS, Favorsky 1a Str, Irkutsk 664033, Russia c Novosibirsk State University, 2 Pirogova St., Novosibirsk 630090, Russia d Australian Research Council Centre of Excellence for Core to Crust Fluid Systems/GEMOC, Department of Earth and Planetary Sciences, Macquarie University, 2109, Australia e Institute for Study of the Earth’s Interior, Okayama University, Misasa, Tottori 682-0193, Japan f State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210046, China ABSTRACT According to present views, the crustal terranes of the Anabar province of the Siberian craton were initially independent blocks, separated from the convecting mantle at 3.1 (Daldyn terrane), 2.9 (Magan terrane) and 2.5 Ga (Markha terrane) (Rosen, 2003, 2004; Rosen et al., 1994, 2005, 2009). Previous studies of zircons in a suite of crustal xenoliths from kimberlite pipes of the Markha terrane concluded that the evolution of the crust of the Markha terrane is very similar to that of the Daldyn terrane. To test this conclusion we present results of U-Pb and Hf-isotope studies on zircons in crustal xenoliths from the Zapolyarnaya kimberlite pipe (Upper Muna kimberlite field), located within the Daldyn terrane, and the Botuobinskaya pipe (Nakyn kimberlite field) in the center of the Markha terrane. The data on xenoliths from the Botuobinskaya kimberlite pipe record tectonothermal events at 2.94, 2.8, 2.7 and 2 Ga. The event at 2 Ga caused Pb loss in zircons from a mafic granulite. U-Pb dating of zircons from the Zapolyarnaya pipe gives an age of 2.7 Ga. All zircons from the studied crustal xenoliths have Archean Hf model ages ranging from 3.65 to 3.11 Ga. This relatively narrow range suggests that reworking of the ancient crust beneath the Nakyn and Upper Muna kimberlite fields was minor, compared with the Daldyn and Alakit-Markha fields (Shatsky et al., 2016). This study, when combined with dating of detrital zircons, implies that tectonic-thermal events at 2.9–2.85, 2.75–2.7 and 2.0–1.95 Ga occurred everywhere on the Anabar tectonic province, and could reflect the upwelling of superplumes at 2.9, 2.7 and 2 Ga. The presence of the same tectonic-thermal events in the Daldyn and Markha terranes (Rosen et al., 2006a,b) supports the conclusion that the identification of the Markha terrane as a se- parate unit is not valid. 1. Introduction The Siberian craton is a Paleoproterozoic mosaic of Archean gran- ulite-gneiss and granite-greenstone terranes of different ages (Rosen et al., 1994, 2005)(Fig. 1). The Archean basement of the craton is overlain by Mesoproterozoic to Lower Cretaceous sedimentary rocks. Until now the age, composition and structure of the buried basement of the Siberian craton have been mainly deduced from studies of out- cropping metamorphic and igneous rocks in the shields and uplifts, borehole samples, crustal xenoliths and geophysical investigations (Rosen et al., 2005, 2006b; Smelov and Timofeev, 2007). Based on these studies Rosen et al. (1994, 2002) divided the Siberian Craton into several tectonic provinces consisting of heterogeneous terranes. The basement of the Anabar province was considered to consist of the Magan and Daldyn granulite-gneiss terranes and the Markha granite- greenstone terrane (Rosen et al., 2006b). All of the known kimberlite fields and the most productive pipes of the Yakutian kimberlite pro- vince, except for the Mirnyi and Upper Muna fields, are located within the Markha granite-greenstone terrane. The Upper Muna field lies within the Daldyn granulite-gneiss terrane. https://doi.org/10.1016/j.precamres.2017.11.017 Received 10 July 2017; Received in revised form 7 November 2017; Accepted 24 November 2017 ⁎ Corresponding author at: Sobolev Institute of Geology and Mineralogy, Koptyuga 3, Novosibirsk 630090, Russia. E-mail address: shatsky@igm.nsc.ru (V.S. Shatsky). Precambrian Research 305 (2018) 125–144 Available online 24 November 2017 0301-9268/ © 2017 Published by Elsevier B.V. T