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Geochemistry, petrology and ore bearing of Early Precambrian basic-ultrabasic complexes of the eastern part of the Ukrainian Shield

ABSTRACT

 

The report on scientific project: 126 p., 70 figs., 33 tables, 63 references.

The object of the researchis volcanic-intrusive rocks of ultrabasic and basic composition of the Archean and Proterozoic ages of the Middle - Dnieper and Azov megablocks of the Ukrainian Shield.

The purpose of the work is to characterize the microelement composition, to reconstruct the geodynamic models of their formation, to investigate the processes of their formation, to determine their ore specialization on the basis of petrological and geochemical data of rock composition studies.

The relevance of the work is determined by the need to systematize data on the genesis and ore-bearing capacity of ultrabasic-basite complexes obtained by previous researchers, the urgent need to study their composition using modern high-precision research methods (ICP-MS, isotope and microprobe) for the possibility of applying modern methods to geochemical reconstructions and establishing the most promising directions searches for related minerals. Until now, all geochemical studies of these rocks were carried out only by spectral analysis methods, which have insufficient accuracy to use modern methods of geochemical reconstructions, which are based mainly on rare and rare earth elements.

The economic value of the work is determined by the need for ore raw materials for metallurgy (Ni, Cr, Co, V, Ti), as well as the probable discovery of precious metal manifestations.

The general research plan included field geological studies of outcrops of ultrabasic-basite complexes, sampling of bore hole and geological data processing, which included petrographic study of thin section of rocks and polished section of rocks. The composition of minerals and rocks was studied by petrographic, microprobe, chemical (wet chemistry and X-ray phase analysis) and ICP-MS methods in the laboratories of IGMOF NAS of Ukraine and abroad.

According to the results of these studies, the microelement composition of early Precambrian ultrabasite-basite complexes of the Middle Dnieper and Azov Megablocks is characterized, reconstruction of geodynamic modes of their formation by modern methods is performed, the content of ore elements in them is investigated.

Authors:

Samborska Iryna Anatoliivna

Artemenko Hennadii Volodymyrovych

Shvaika Iryna Anatoliivna

Hoholev Kostiantyn Ihorovych

Other authors:

A.I. Hurnenko, V.A. Vilkovskyi, O.Y. Pavlenko

Keywords:

Middle-Dnieper megablock, Azov megablock, basites, ultrabasites, minerals, Mesoarchean greenstone belts, metacomatiites, mantle plumes, geochemistry, Ukrainian shield

Head of the research:

Samborska Iryna Anatoliivna

Registration Card (RC):

0117U002488

Execution period of the research:

2017 - 2021