1-2026

CONTENTS # 1/2026

Spiridonov I.G., Kilipko V.A., Tatarinov V. Yu. (IMGRE)

MULTI-SCALE REGIONAL GEOCHEMICAL WORKS. STATUS, PROBLEMS, DEVELOPMENT PROSPECTS

The issues of the organization of the system of geochemical support for the regional geological studies carried out by the IMGRE within the framework of the State task are considered. Availability of the geochemical base maps to be produced as a result of the budget-financed geological mapping is characterized, along with the main shortcomings and problems of the multi-scale geochemical work. The future views and the directions of development are displayed.

Keywords: geochemical mapping, summary predictive geochemical map, mineragenic taxa, ecological geochemistry.

Р. 4

Kremenetskiy A.A., Vetrin V.R., Spiridonov I.G. (IMGRE)

THE DISYMMETRIC FORMATION OF THE EARTH’S LITHOSPHERE — AN ALTERNATIVE TO THE CONCEPT OF PLATE TECTONICS

The formation of the Earth’s continental and oceanic lithosphere is determined by the initially disymmetric formation of the «continental» and «marine» hemispheres of the Earth differing in regimes of meteorite and asteroid bombardment. The first stage (4.5–3.5 b.y.) is characterized by continuous meteorite bombardment and melting of the primordial planetary silicate material, resulting in the formation of a continuous felsic proto-crust on the planet’s surface. The second stage (<3.5 b.y.) is characterized by localized asteroid bombardment, fragmentation of the felsic proto-crust, and the generation of mafic-ultramafic melts from the subcrustal layers of the magmatic ocean, resulting in the formation of ancient oceanic crust.

Keywords: disymmetry of the Moon and the Earth, continental and oceanic lithosphere, Pacific Ocean.

Р. 10

Nikolaev Yu.N., Kalko I.A., Apletalin A.V., Balykova I.V. (MSU)

PROBLEMS AND SOLUTIONS IN THE TRANSITION FROM REGIONAL GEOCHEMICAL WORK TO GEOCHEMICAL PROSPECTING

Geochemical methods have always occupied a leading position in the system of geological exploration of the subsoil and mineral prospecting. The hierarchy of multi-scale geochemical surveys established during the Soviet period corresponded to the stages and phases of geological exploration and was based on the principle of successive approaches to the prospecting object—the mineral deposit. Violation of this conceptual principle led to the loss of the prospecting object. In this regard, the decision to reintroduce geochemical prospecting at a scale of 1:50 000 as a standalone method seems justified and timely. This article is devoted to some existing problems and their solutions on the way to the emerging transition.

Keywords: stream sediments, secondary halos, geochemical work on a scale of 1:50 000.

Р. 20

Krinochkin L.А.¹, Kilipko V.A.¹, Trofimov A.P.¹, Krinochkina O.K.², Balychev E.N.¹ (1 — IMGRE, 2 — MGSU)

IDENTIFICATION OF DIAMOND-BEARING AREAS BASED ON GEOCHEMICAL DATA (EASTERN ANABAR)

The purpose of the research is to determine the possibility of identifying diamond-bearing areas during medium-scale geochemical surveys. Geochemical criteria for identifying and sorting potentially diamond-bearing areas have been developed. The anoma lous geochemical area of the Malokuonam deposit was used as a reference object. An assessment of the diamond-bearing potential of the Myunyusyakh and Ebilyakh areas was carried out. Four new prospective anomalous geochemical areas were identified.

Keywords: anomalous geochemical field, geochemical basis, diamond-bearing potential, kimberlite pipe.

Р. 30

Tatarinov V.Yu.¹, Krupin S.A.¹, Aleshina K.F.², Khlebnikova O.A.² (1 — IMGRE, 2 — MSU)

CLASSIFICATION OF THE GAKKEL RIDGE AS AN UNDERWATER RIDGE IN TERMS OF ARTICLE 76 OF THE 1982 UN CONVENTION ON THE LAW OF THE SEA

The procedure for establishing the outer limits of the continental shelf beyond 200 nautical miles is a complex and lengthy international legal process regulated by the 1982 United Nations Convention on the Law of the Sea (hereinafter referred to as the Convention). Its purpose is to legally secure the right of the coastal state to explore and exploit the seabed and subsoil resources in these areas. The main documents establishing the procedure are Part VI of the Convention (Article 76) and Annex II to the Convention. The Commission on the Limits of the Continental Shelf (hereinafter referred to as the CLCS), a special international body of 21 experts in the fields of geology, geophysics, and hydrography, plays a central role in the process. Russia actively participates in this process. The first submission to the CLCS was made in 2001, and in 2023 Russia submitted its application materials for the Gakkel Ridge. These documents substantiate that the Gakkel Ridge is a submarine ridge representing a natural continuation of the continental margin into the Laptev Sea. Bathymetric data from 2022 and 2024 clearly confirm that the Gakkel Ridge is morphologically connected to the Eurasian continental margin and is part of it within the meaning of Article 76. The process of establishing the outer limits of the continental shelf beyond 200 nautical miles is a critical mechanism for expanding the rights of coastal states to marine resources in strict accordance with international law.

Keywords: Arctic Ocean, Eurasia Basin, Gakkel Ridge, Commission on the Limits of the Continental Shelf.

Р. 37

Kubantsev I.A., Kilipko V.A., Sharoyko Yu.A., Kalyeva O.P. (IMGRE)

DISPLAYING THE COMPOSITION OF A PRIORI GEOCHEMICAL ASSOCIATIONS IN REGIONAL GEOCHEMICAL MAPPING

This paper examines the applicability of a graphical presentation method of a priori geochemical associations’ composition. This original approach was introduced by Swiss specialists when compiling a geochemical atlas of their country. To assess its feasibility, the authors used it when processing the soil extract analysis results obtained as part of a regional multipurpose geochemical soil survey on mapsheet N-40 at a scale of 1:1000 000 (MPGM-1000). The sheet boundaries contain the Republic of Bashkortostan almost entirely, as well as parts of the Sverdlovsk, Chelyabinsk, and Orenburg regions, and a small fragment of the Republic of Tatarstan. The Swiss method was positively  estimated. Its capabilities were expanded through the use of geostatistical techniques.

Keywords: geochemical mapping, secondary halos and dispersion flows, geochemical association, complexity index, geostatistics.

Р. 45

Trofimov A.P., Vedyaeva I.V. (IMGRE)

FEATURES OF THE PREDICTIVE GEOCHEMICAL ASSESSMENT OF THE DIAMOND POTENTIAL OF THE EASTERN FRAMING OF THE ANABAR SHIELD

Based on new data from the geochemical survey of the eastern margin of the Anabar Shield, geochemical indicators of potentially diamond-bearing formations have been developed.

Keywords: Anabar shield, geochemical criteria, secondary halos, kimberlites, kimpycrits, carbonatites, diamonds.

Р. 51

Klyucharev D.S.¹, Rubanov V.G.² (1 — IMGRE, 2 — IE «Rubanov Vladimir Grigorievich»)

PHILOSOPHICAL ANALYSIS OF THE APPLICABILITY OF ABNORMAL GEOCHEMICAL FIELDS FOR IDENTIFYING POTENTIALLY-PROSPECTIVE OBJECTS (through the eyes of an amateur)

The article analyzes the applicability of abnormal geochemical areas (fields) (AGA (F)) to identification potentially prospective areas and finding new objects, shown boundary conditions of the applicability of AGA (F). The examples show the sequence of selecting potential objects and consider the limitations of the method.

Keywords: abnormal geochemical area, geochemical zone, prospecting, potentially prospective area.

Р. 58

Solenikova E.O.¹, Kozlovskiy V.M.^{1, 2}, Levchenko E.N.¹ (1 — IMGRE, 2 — IGEM RAS)

USING THE RAMAN SPECTROSCOPY METHOD TO SOLVE EXPLORATION GEOCHEMICAL AND TECHNOLOGICAL PROBLEMS

The article discusses some typical problems encountered by researchers when analyzing matter mineral phase using optical methods, and suggests ways to solve these problems using Raman spectroscopy.

Keywords: ramanspectroscopy, spectrum, pseudomorphosis, laser, mineral phase, diagnostics.

Р. 63

Philippov N.B., Ferapontova S.Yu. (Karpynsky institute)

THE NATURE OF THE ZIRCONIUM AND YTTRIUM GEOCHEMICAL ANOMALIES IN THE WEST KEIVY AREA (EASTERN PART OF THE KOLA PENINSULA) AND THEIR PROSPECTING SIGNIFICANCE (ACCORDING TO THE RESULTS OF THE GDP-200 SHEETS Q-37-I, II)

The article presents the results of an analysis of anomalous geochemical fields in secondary halos and scattering flows, as well as maps of ore anomalies on a scale of 1 : 200 000 across the Zapadno-Keivy area. Areal anomalies of zirconium and yttrium, confined to the endo- and exocontacts of the alkaline granite complex, have been identified. Geochemical anomalies have a close spatial connection with the development of aerogamma-spectrometric anomalies of thorium. Field verification of the anomalies showed that the ore mineralization is confined to quartz-feldspar and fluorite-magnetite-quartz veins. Zirconium–yttrium ores contain a significant admixture of rare earth metals. A potential Kuljok ore field has been identified, where geological and mineragenic mapping on a scale of 1:50 000 is recommended.

Keywords: zirconium, yttrium, ore occurrences Sakharjok, Umperyaive, alkaline granites, ore metasomatites.

Р. 73

Volfson I.F., Bobkov R.A. (IMGRE)

SCIENTIFIC AND METHODOLOGICAL BASIS FOR ECOLOGICAL SAFETY OF TERRITORIES OF GEOLOGICAL RISK

Geology in modern conditions is acquiring a significant social orientation, playing an increasingly important role in protecting the rights of the population to live and work in an environmentally safe environment. Promising areas of the natural sciences are increasingly coming to the forefront.

Keywords: geological exploration branch of the economy, environmental safety, geological risks, health of production professionals, public health.

Р. 79

Morozov M.V. (JSC «Polymetal Management», Saint Petersburg State University)

ONE HUNDRED YEARS OF RUSSIAN EXPLORATION GEOCHEMISTRY. THE FIRST PAGES

For the first time, the history of the development of exploration geochemistry as a new technological direction of geological exploration is consistently described. M.P. Rusakov (1926) was the first to apply the method of geochemical prospecting based on ‘primary’ ore haloes in Kazakhstan. V.A. Sokolov developed (1929–1935) a method for gas surveying. The general concept of prospecting based on dispersion (‘secondary’) haloes and its practical implementation emerged in the period from 1932 to 1941 as a result of the work of a team of specialists led by N.I. Safronov, E.A. Sergeev, and A.P. Solovov.

Keywords: exploration geochemistry, cuprometric maps, metallometric survey, dispersion haloes, history of science.

Р. 86