V.M. Makagon's research while affiliated with Vinogradov Institute of Geochemistry SB RAS and other places
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Publications (7)
On the background of Early Paleozoic precollisional, syncollisional, and late collisional igneous rocks prevailing in the region (Khaidai and Shara-Nur granitoids and Birkhin gabbroid complex), rare-metal pegmatoid granite bodies and pegmatites along the southern edge of the Ol'khon region are of particular interest. They have a Middle Paleozoic ag...
The article examines the behavior of one of the technologically most important trace elements (lithium)
in natural systems: granitic pegmatite, subsurface brines and salars. Major lithium sources are spodumene
pegmatites and natural brine of salt lakes. This article is a brief overview of the latest data on Siberia and
other world regions, inclu...
The authors analyze the geodynamic settings of large fields of spodumene pegmatites hosting Li and complex (Li, Cs, Ta, Be, and Sn) deposits of rare metals within the Central Asian Fold Belt. Most of the studied fields show a considerable time gap (from few tens of Myr to hundreds of Myr) between the spodumene pegmatites and the associated granites...
A hierarchic systematics of granitic pegmatites is proposed, which is based on the factors of different ranks that are responsible for characteristics of pegmatite fields as a whole and of individual pegmatite bodies. Three main levels of classification are as follows: formations (subformations) - minerogenic (geochemical) evolution sequence - para...
Citations
... There are also magnetite, titanite, and apatite. During mineralogical studies, the compositions of rare minerals were determined using Geol Superprobe-733 and JXA 8200 microanalyzers (analyzed by L.F. Suvorova): monazite, xenotime, euxenite, zircon, thortveitite, ittro-wolframite, Nb-Ta-wolframite, wolframoixiolite, cassiterite [17]. Pegmatoid microclinicalbite granites of Tashkiney with a large schlier separation of rare metal pegmatite are essentially potassium rocks (K2O = 5.66-8.60 ...
... [7] studied the opening of the South Atlantic, and Galetskiy [8] and Mints [9] discussed the tectonic evolution of the Eastern Baltic and Ukrainian shields, respectively. Mohammedyasin et al. [10] claimed that the rare metal mineralization of the Kenticha deposit in southern Ethiopia marked the end of the East African Orogeny, and Makrygina et al. [11] concluded that the Ol'khon rare metal pegmatoid granites marked the beginning of the Hercynian within-plate stage in the eastern Baikal area of Russia. ...
... It is known that rare-metal pegmatite fields occur in two types of regional geologic structures. First, these are collision zones; second, trough structures in areas of intracontinental rifting (Altukhov et al., 2005; Arkhangel'skaya, 2008; Gusev et al., 2012; Martin and De Vito, 2005; Tkachev, 2011; Zagorsky and Makagon, 2005; Zagorsky et al., 2010). The former are more typical of the Phanerozoic, and the latter, for the Proterozoic. ...
... In addition to lithium, these pegmatites contain Nb, Ta, Sn, Cs, Be, and other rare elements. Large deposits of albite-spodumene pegmatites are located in Canada, the USA, China, Australia, Russia, Brazil, Zimbabwe, and other countries throughout the world [1], [2], [3], [4], [5], [6], [7], [8]. Lithium reserves can reach one million tons in such deposits [9]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/504385970151425-1497266394198_Q64/Olga-Gavryushkina.jpg)
... Geoscientists have made many attempts to find a suitable classification scheme for pegmatites [2,3,24,39,[44][45][46][47]. Ginsburg et al. (1979) [45] divided pegmatites into four categories based on the depth of emplacement, relationship to metamorphism, and granitic plutons: abyssal, muscovite, rare-element (REL) and miarolitic classes. ...
... Generally, they appear in orogenic zones, but only a few are syn-collisional, whereas most are late-to postcollisional and are related to extensional processes or large strike-slip fault systems (e.g. Zagorsky et al., 2014). Even most syn-collisional examples are related to major extensional structures such as those in the Himalaya, which appear together with (leuco)-granite along the South Tibetan Detachment (e.g. ...
