Abstract
This study evaluates for the first time Hf-isotope characteristics of zircon from dunite of the Kondyor massif, which is closely related to an economic platinum placer deposit. The significant range in εHf(t) values (from –8.4 ± 0.8 to 10.5 ± 1.3) in Mesozoic zircons indicates the interaction of a “juvenile” mantle source (εHf(t) = +15) with distinct magma sources, equivalent to a subcontinental lithospheric mantle and/or a continental crust. The peculiarities of the Hf-isotopic composition of Precambrian zircons (εHf(t) from –2.3 to +0.3) is consistent with their xenogenic origin and inheritance from basement rocks of the Siberian Craton.
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ACKNOWLEDGMENTS
This study was supported by the Federal Agency of Scientific Organizations (no. 0393-2016-0017), and is partly funded by the RFBR (grant no. 16-05-00967-a). The Hf-isotope data were obtained using instrumentation funded by DEST Systemic Infrastructure Grants, ARC LIEF, NCRIS/AuScope, industry partners and Macquarie University (publication no. 1016 from the ARC Centre of Excellence for Core to Crust Fluid Systems, (http://www.ccfs.mq.edu.au) and publication no. 1185 in the GEMOC Key Centre, http://www.gemoc.mq.edu.au).
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Badanina, I.Y., Belousova, E.A. & Malitch, K.N. Hafnium Isotope Composition of Zircon from the Kondyor Clinopyroxenite-Dunite Massif (Khabarovsk Territory, Russia). Dokl. Earth Sc. 486, 679–682 (2019). https://doi.org/10.1134/S1028334X19060138
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DOI: https://doi.org/10.1134/S1028334X19060138