(5) Two possible scenarios for the evolution of an open magmatic
system are considered. One hypothesis takes into account that
the formation of a thick sequence of Ol-rich cumulate pile should
be accompanied by compaction and crystallisation, giving rise
to upward migration and inﬁltration of the intercumulus melts.
The second hypothesis suggests that the Dovyren chamber is a
magma-staging system, through which large amounts of olivine
gabbronorite magmas have passed, leaving behind a complemen-
tary melt-depleted succession of dunite, troctolite, and gabbroic
cumulates. Here we propose a hybrid mechanism whereby these
processes proceeded simultaneously. Our current model suggests
that only minor fractionation of the Dovyren parental magmas oc-
curred at the early to middle stages of solidiﬁcation. However, one
cannot exclude the possibility that at a ﬁnal stage of evolution the
magma chamber became closed, thus favouring in situ magma
fractionation within the upper portion of the residual heteroge-
neous reservoir. This is consistent with the most evolved mineral
compositions observed in olivine-free gabbronorite and quartz-
pigeonite gabbro from the uppermost YDM.
(6) Reconstructions of the time-dependent evolution of ε
YDM rocks suggest for the Dovyren magmas an anomalous mantle
protolith formed at the Meso-Neoarchean boundary at ~2.8 Gyr. It
remained isolated from magmatic events for ~2 Gyr, and then
reactivated at 728 Ma.
Supplementary data to this article can be found online at https://doi.
We gratefully acknowledge thoughtful reviews by Steve Barnes, Rais
Latypov and two anonymous reviewers, as well as constructive com-
ments from the editor Andrew Kerr. We acknowledge support from
AngloAmerican, BHP Billiton, Votorantim Metais, and the Australian
Research Council through funding to CODES (University of Tasmania,
Hobart, Australia) at the initial stage of this research (AMIRA project
P962, 2007–2010); support from the Russian Science Foundation (RSF,
grant No. 16-17-10129, 2016–2018); and support from the University
of Tasmania through Visiting Scholarships to AAA in 2011 and 2014.
MLF acknowledges support from the Australia n Research Council through
the Future Fellowship Scheme (FT110100241) and Foundation Project 2a
of the Centre of Excellence for Core to Crust Fluid Systems. We thank
Roland Maas (School of Earth Sciences, the University of Melbourne),
Sebastian Meffre, Sarah Gilbert, and Paul Olin (University of Tasmania)
for assistance with analytical work. Kirill Bychkov, Ian Woolword,
Ludmila Zhitova, Dima Kamenetsky, Alexey Lygin, Jonas Mota e Silva,
and Dmitry Orsoev assisted during ﬁeldwork at the YDM in 2007. We also
thank Evgeny Koptev-Dvornikov (Moscow State University, Russia) for
his help with description of thin-sections, Masha Anosova and Kostya
Ryazantsev (Vernadsky Institute, Moscow) for their assistance with sam-
ple preparation, and Kirill Bychkov for his work on the COMAGMAT-5
model. The authors would like to particularly acknowledge the con-
tributions of late Dr. Eduard Konnikov who worked on this project in
2007–2011. We thank Candace S. O'Connor for careful editing of the
submitted manuscript. This is contribution 1045 from the ARC Centre of
Excellence for Core to Crust Fluid Systems (http://www.ccfs.mq.edu.au).
Amelin, Yu.V., Neymark, L.A., Ritsk, E.Yu., Nemchin, A.A., 1996. Enriched Nd–Sr–Pb isoto-
pic signatures in the Dovyren layeredintrusion (EasternSiberia, Russia): evidence for
source contamination by ancient upper-crust material. Chem. Geol. 129, 39–69.
Ariskin, A.A., Konnikov, E.G., Kislov, E.V., 2003. Modeling of the equilibrium crystallisation
of ultramaﬁc rocks with application to theproblems of formation of phase layering in
the Dovyren pluton, Northern Baikal region, Russia. Geochem. Int. 41, 107–129.
Ariskin, A.A., Konnikov, E.G., Danyushevsky, L.V., Kislov, E.V., Nikolaev, G.S., Orsoev, D.A.,
Barmina, G.S., Bychkov, K.A., 2009. The Dov yren Intrusive Complex: problems of
petrology and Ni sulﬁde mineralization. Geochem. Int. 47, 425–453.
Ariskin, A.A., Danyushevsky, L.V., Bychkov, K.A., McNeill, A.W., Barmina, G.S., Nikolaev,
G.S., 2013a. Modeling solubility of Fe-Ni sulﬁdes in basaltic magmas: the effect of
Ni in the melt. Econ. Geol. 108, 1983–2003.
Ariskin,A.A., Kostitsyn, Yu.A., Konnikov, E.G., Danyushevsky, L.V., Meffre, S., Nikolaev, G.S.,
McNeill, A., Kislov, E.V., Orsoev, D.A., 2013b. Geochronology of the Dovyren Intrusive
Complex, Northwestern Baikal area, Russia, in the Neoproterozoic. Geochem. Int. 51,
Ariskin, A.A., Danyushevsky, L.V., Konnikov, E.G., Maas, R., Kostitsyn, Yu.A., McNeill, A.,
Meffre,S., Nikolaev,G.S., Kislov,E.V., 2015a. TheDovyren Intrusive Complex(Northern
Baikal region, Russia): isotope-geochemical markers of contamin ation of parental
magmas and extreme enrichment of the source. Russ. Geol. Geophys. 56, 411–434.
Ariskin, A.A., Nikolaev, G.S., Danyushevsky, L.V., Kislov, E.V., Malyshev, A., Barmina, G.S.,
2015b. New type of low-sulﬁde PGE mineralization in primitive troctolites from the
Yoko-Dovyren layered massif. Proceedingsof XII All-RussianPetrographic Conference
vol. 1, pp. 289–291 (Petrozavodsk, Karelia, (in Russian)).
Ariskin, A.A., Danyushevsky, L.V., Kislov, E.V., Nikolaev, G.S., Fiorentini, M., Gilbert , S.,
Goemann, K., Malyshev, A., 2016. Cu-Ni-PGE fertility of the Yoko-Dovyren layered
massif (Northern Transbaikalia, Russia): thermodynamic modeling of sulﬁde compo-
sitions in low mineralized dunites based on quantitative sulﬁde mineralogy. Mineral.
Deposita 51, 993–1011.
Balykin, P.A., Polyakov, G.V., Bognibov, V.I., Petrova, T.E., 1986. Proterozoic Ultrabasic-
basic Rock Associations of the Baikal–Stanovoi Area. Nauka, Novosibirsk (in Russian).
Barnes, S.J., Mungall, J.E., LeVaillant, M., Godel, B., Lesher, C.M., Holwell, D., Lightfoot, P.C.,
Krivolutskaya, N., We i, B., 2017. Sulﬁde-silicate textures in magmatic Ni-Cu- PGE
sulﬁde ore deposits: disseminated and net-textured ores. Am. Mineral. 102,473–506.
Bolikhovskaya, S.V., Yaroshevskii, A.A., Koptev-Dvornikov, E.V., 2007. Simulation of the
Geochemical Structure of the Ioko-Dovyren Layered Intrusion. 45. Northwestern
Baikal Area Geochemistry International, pp. 519–537.
Denisova,M.V., 1961. Copper-nickel sulﬁde mineralization in a maﬁc-ultramaﬁcmassifof
the Baikal Folded area. Proceedings on Geology and Mineralogy of Ore Deposits of
USSR (New Series 60). VSEGEI, Leningrad, pp. 37–46 (in Russian).
Distler, V.V., Ste pin, A.G., 1993. Lo w-sulﬁde PGE-bearing unit of the Yoko–Dovyren
layered ultrabasic-basic intrusion (Northern Baikal region). Dokl. Akad. Nauk 328,
Eﬁmov, A.A., Potapova, T.A., 2003. Geochemistry of strontium in layered intrusions: a pet-
rogenetic aspect (the example of the Ioko-Dovyren a nd some other complexes) .
Geochem. Int. 41, 753–769.
Ernst, R.E., Bleeker, W., 2010. Large igneous provinces (LIPs), giant dyke swarms, and
mantle plumes: signiﬁcance for breakup events within Canada and adjacent regions
from 2.5 Ga to present. Can. J. Earth Sci. 47, 695–739.
Ernst, R.E., Hamilton, M.A., Söderlund, U., Hanes, J.A., Gladkochub, D.P., Okrugin, A.V.,
Kolotilina, T., Mekhonoshin, A.S., Bleeker, W., LeCheminant, A.N., Buchan, K.L.,
Chamberlain, K.R., Didenko, A.N., 2016. Long-lived connection between southern Siberia
and northern Laurentia in the Proterozoic. Nat. Geosci. 9:464–469. https://doi.org/
Fomin, I.S., Nikolaev, G.S., Ariskin, A.A., 2013. Estimates of redox conditions and tempera-
tures of closure of the olivine-spinel system in cumulate rocks of the Ioko-Dovyren
layered intrusi on. Proceedings of 12th SGA Biennial Meeting “Mineral deposit
research for a high-tech world”. vol. 3, pp. 982–984 12–15th August 2013, Uppsala,
Grudinin, M.I., 1963. Geology and petrology of the Dovyren gabbro-p eridotite massif,
Northern Baikal area. Geology and Geophysics 4, 78–91 (in Russian).
Grudinin, M.I., 1965. Petrography of the Nyurundukan and Dovyren gabbro-peridotite
massifs, Northern Baikal area. In: Afanasiev, G.D., Belov, I.V. (Eds.), Petrography of
EasternSiberia. vol.3.Nauka,Moscow,pp.5–112 (in Russian).
Gurulev, S.A., 1965. Geology and Genesis of the Yoko-Dovyren Gabbro-peridotite Massif.
Nauka, Moscow (in Russian).
Gurulev, S.A., 1983. Genesis of Layered Maﬁc Intrusions. Nauka, Moscow (in Russian).
Heaman, L.M., LeCheminant, A.N., Rainbird, R.H., 1992. Nature and timing of Franklin
igneous event, Canada: implications for a Late Proterozoic mantle plume and the
break-up of Laurentia. Earth Planet. Sci. Lett. 109, 117–131.
Jowitt, S.M., Ernst, R.E., 2013. Geochemical assessment of the metallogenic potential of
Proterozoic LIPs of Canada. Lithos 174, 291–307.
Kislov, E.V., 1998. The Yoko-Dovyren Layered Massif. BNTsRAN, Ulan-Ude (in Russian).
Kislov, E.V., 2010. The nickelreserve of Russia: the Northern Baikal nickel-fertileprovince.
Globus (Geology and Business) 13, 30–37 (in Russian).
Kislov, E.V.,Konnikov, E.G., Orsoev, D.A., Pushkarev, E.V., Voronina, L.K., 1995. Constraints
on the genesis of lo w-sulphide PGE mi neralization at the Ioko-Dovyren layered
massif, Northern Transbaikalia, Russia. In: Pasava, J., Kribek, B., Zak, K. (Eds.), Mineral
Deposits: From TheirOrigin to Their Environmental Impacts. AA Balkema, Rotterdam,
Konnikov, E.G., 1986. Differentiated Ultrabasic-basic Complexes in the Precambrian Rocks
of Transbaikalia. Nauka, Novosibirsk (in Russian).
Konnikov, E.G., Kislov, E.V., Orsoev , D.A., 1994. Yoko-Dovyren layered pluton and
related mineralization, Northern Transbaikalia (in Russian). Geol. Ore Deposits 36,
Konnikov, E.G., Tsygankov, A.A., Vrublevskaya, T.T., 1999. The Baikal–Muya Volcanic-
Plutonic Belt: Lithotectonic Complexes andGeodynamics.GEOS, Moscow (inRussian).
Konnikov, E.G., Meurer, W.P., Neruchev, S.S.,Prasolov, E.M., Kislov, E.V.,Orsoev, D.A., 2000.
Fluid regime of platinum group elements (PGE) and gold-bearing reef formation in
the Dovyren maﬁc–ultramaﬁc laye red complex, East ern Siberia, Russia. Mineral.
Deposita 35, 526–532.
Kostitsyn, Yu.A., 2004. Terrestrial and chondritic Sm–Nd and Lu–Hf isotopic systems: are
they identical? Petrology 12, 397–411.
Kostitsyn, Yu.A., 2007. Relationships between the chemical and isotopic (Sr,Nd, Hf, and
Pb) heterogeneity of the mantle. Geochem. Int. 45, 1173–1196.
261A. Ariskin et al. / Lithos 302–303 (2018) 242–262