Magazine «Otechestvennaya Geologiya» (“National Geology”)


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Metalliferous and nonmetalliferous mineral deposits
V.V.KUZNETSOV, T.V.SERAVINA, S.V.KUZNETSOVA, S.L.ELSHINA Localization conditions of pyrite-polymetallic mineralization in the Ulugojskaja mineragenic zone (Republic of Tuva)

V.V.KUZNETSOV, T.V.SERAVINA, S.V.KUZNETSOVA, S.L.ELSHINA (Central Research Institute of Geological Prospecting for Base and Precious Metals)

The article discusses the features of the geological structure and the conditions for the formation of pyrite-polymetallic deposits and ore occurrences of the Ulugojskaja mineragenic zone, which are of the VMS type. It was established that the process of ore formation is closely related to the formation of a volcanogenic contrastrhyolite-basaltformation (Tumattayginskaja, Tapsinskaja (Syynakskaja) series of the Lower Cambrian age); deposits are localized in local paleodepressions; ore-bearing rocks belong to the volcano-sedimentary facies;themainmineral types of ores: pyrite-polymetallic, pyrite-lead-zinc, copper-pyrite, barite-polymetallic, with gold; industrial ore deposits formed synchronously with volcanism. Within the mineralogical zone 3 ore districts have been identified: Kyzyl-Tashtygskij, Kyzyl-Tashskij and Ottugaiginskij. A geometrized model was created and the pyrite-polymetallic mineralization of the KyzylTashtygskoe deposit was studied.

Keywords: Ulugojskaja mineragenic zone, VMS, lead and zinc, Kyzyl-Tashtygskoe deposit.

V.V.KUZNETSOV, PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

T.V.SERAVINA, PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

S.V.KUZNETSOVA This email address is being protected from spambots. You need JavaScript enabled to view it.

S.L.ELSHINA This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.24411/0869-7175-2020-10014
D.A.KORCHAGINA Prospects for new polymetallic deposit discovery in Trans-Baikal region

D.A.KORCHAGINA (Central Research Institute of Geological Prospecting for Base and Precious Metals)

РLead and zinc mineral base status in Argun metallogenic zone is considered. Operating plant mineral insufficiency is shown. Discovery prospects for new Noyun-Tologoi and Argun mineral- ization type deposits are validated. Undiscovered resourcesfor promising areas are established. Mulinskaya and Mankovskaya (Noyun-Tologoi type), and Vozdvizhenskaya and Zapokrovskaya (Argun type) areas are revealed as prioritized prospecting areas.

Keywords:lead, zinc, mineral base, Trans-Baikal region, reserves, production, Argun metallo- genic zone, undiscovered resources, promising areas.

D.A.KORCHAGINA This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.24411/0869-7175-2020-10015
Lithology, petrology, mineralogy, geochemistry
V.S.ZVEZDOV Mechanisms of basite magma injection into the East Siberian platform’s multilayer cover and rock deformation properties impact on ore-bearing trappean intrusion location and morphology (an example from Norilsk district)

V.S.ZVEZDOV (Central Research Institute of Geological Prospecting for Base and Precious Metals)

The paper provides an insight into potential mechanisms of basite melt injection into volcanogenicsedimentary strata of the upper platform cover which led to the observed morphological and struc- tural features of ore-bearing trappean plutons. It is shown that their form and position in a geolog- ical section depend on host rock thermal stability and deformation properties. At the lower intru- sion localization level, «magmatic replacement» (thermal erosion) of carbonate and saline rocks by high-temperature sulfide-silicate melt prevailed, which does not preclude their consolidation as a result of plastic «flow» at the medium and upper levels with flyschoid terrigenous and volcano- genic rocks as plastic and brittle deformations; this is suggested by chonolith-like morphology of intrusive bodies in the first and second instances and plate-like morphology in the third instance. The data obtained is useful in updating geological-genetic models of layered plutons and associated Cu-Ni-PGM deposits as well as forecasting-prospecting models based on them.

Keywords: differentiated trappean plutons, Cu-Ni-PGM deposits, melt injection mechanisms, thermal stability, deformation rock properties, intrusion morphology and structure.

V.S.ZVEZDOV, PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.24411/0869-7175-2020-10016
N.N.ZINCHUK, V.I.KOPTIL Specific features of diamonds from ancient sedimentary thick layers within crystalline massif influence areas

N.N.ZINCHUK, V.I.KOPTIL (West-Yakutian Scientific Centre of RS (Y) AS)

Based on generalization of large actual material on complex investigation of diamonds, their characteristic in Upper Paleozoic and Mesozoic sedimentary thick layers of the Siberian platform is provided. Special attention is paid to the Central-Siberian sub-province; there, the development area of individual diamond macro-associations is limited by a specific diamondiferous region where complexes of noncoeval terrigenous and coastal Upper Paleozoic and Mesozoic sediments are developed. Polygeny of mineralogical associations of diamonds from noncoeval placers within some diamondiferous regions was noted, which may be successfully used when forecasting and prospecting for primary mineral sources.

Keywords: Upper Paleozoic and Mesozoic sediments, Siberian platform, diamond and diamondiferous placers.

N.N.ZINCHUK, PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

V.I.KOPTIL , PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.24411/0869-7175-2020-10017
Hydrogeology, engineering geology
A.I.MALOV The role of glaciations and marine transgressions in the evolution of the underground hydrosphere of the coastal Arctic territory

A.I.MALOV (Laverov Federal Center for Integrated Arctic Research of RAS)

Geochemical processes and climatic changes in the Pleistocene-Holocene were reconstructed from changes in the isotope-chemical composition of groundwater on the eastern slope of the Baltic Shield over the past 400,000 years. The contributions of melt glacier, sea and meteoric waters and brines in groundwater formation is estimated. It was established that fresh water penetrated the sedimentary cover of the Mezen syneclise to a depth of 600 m as a result of the ice sheets melting 400–130 ka. The sea transgression (130–115 ka) led to groundwatersaliniza- tion in the upper part of the sedimentary cover. The subsequent glacier melting (13–12 ka) and precipitate infiltration in the past 12 ka led to fresh water formation to depths of 100–200 m.

Keywords:groundwater, stable isotopes, glacial meltwater, seawater, mixing, dating.

A.I.MALOV, PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.24411/0869-7175-2020-10018
TsNIGRI - 85 years
E.G.MIRLIN TsNIGRI researcher contribution to the World ocean geology and ore potential study

E.G.MIRLIN(V.I.Vernadsky state geological Museumofthe Russian Academy of Sciences)

E.G.MIRLIN, PhD This email address is being protected from spambots. You need JavaScript enabled to view it.

DOI:10.24411/0869-7175-2020-10019
75th anniversary of victory

L.A. Nikolaeva

Memorable dates

B.K. Mikhailov

B.A. Yatskevich

A.G. Volarovich

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