PLACER OF IRON-BEARING MINERALS IN THE SAKHALIN REGION

• Published in: Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov
• Main Authors: Vyacheslav A. Melkiy, Alexey A. Verkhoturov
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Tomsk Polytechnic University 2019
• Subjects: metalic natural resources; placers of titanomagnetite; continental margin; sakhalin region; petrogenesis; ferrous minerals; titanium; vanadium; accessory elements-impurities; economic efficiency; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; TA703-712; Kamchatka; Sakhalin
• Online Access: https://doi.org/10.18799/24131830/2019/1/46; https://doaj.org/article/d78b9e1024e140fa86140fa0c61de816

Yuriy A. Bilibin has repeatedly stressed that in order to understand the picture of the formation of placers, you need to know the full cycle of their transformations. Much attention has been paid in recent years to the problems of finding ancient buried placers and placers complex structure. The rich reserves of minerals in placers are explained by the multiplicity of their genetic types, which allow involving new deposits in commercial exploitation. The relevance of the work is caused by the need to identify new sources of iron, titanium and vanadium in terms of reducing the resources of the mineral resource base. Exploration works performed to identify placers, the most promising for development, can be carried out on the basis of the awareness of the genesis of their formation. The main aim of the research is to study the laws of distribution patterns of placers of ferrous minerals within the Sakhalin region, identify the petrogenetic features of the prevailing minerals, define the prospects of exploration of deposits of iron-containing raw materials, assess the economic expediency of their extraction. The methods. We have researched iron-titanium-oxide minerals from different silicic-acidic rocks of island-arc volcanogenic complexes of Great Kuril String of islands. Thin sections of samples of rock and magnetic fraction of crushed samples were prepared. The thin sections of the rocks were studied under a polarizing microscope. Crushed samples of rocks and their monomineral fractions were studied by means of chemical analytical methods (gravimetric, titrometric, spectrophotometric, X-ray fluorescence, mass spectrometry with inductively coupled plasma). The results. We have completed studies of the patterns of formation of ferruginous placers and identified their main types. There are two types of placers with different conditions of alimentation zone of minerals on the coasts of the Russian Far East. One of them – Kuril-Kamchatka province of placers actually titanomagnetite – is located on the territory of ...