Мінеральні ресурси України (Dec 2024)
Determination of priority areas for development within Selyshchanskyi placer using ArcGIS software
Abstract
The geological characteristics of the Selyshchanskyi placer, which is the part of the Irshansk group of placers of the Volyn titanium-bearing district, are given. Productive ilmenite-bearing deposits are spatially limited to two local depressions of the paleovalley and form two separate deposits – Northern and Southern. Ore-bearing deposits are represented by alluvial Lower-Middle Quaternary and Middle Jurassic and Upper Cretaceous formations and ilmenite-enriched weathering crust, which is common only within the Northern deposit. The author’s method of contouring priority areas within Ti-Zr deposits based on the ArcGIS geoinformation system is presented. The proposed technique allows for a preliminary assessment of deposits and manifestations without additional drilling, which is economically beneficial. Based on the coordinates and description of the wells, as well as the test results, a database was created with a reference to the world coordinate system. Obtained cartographic constructions visually reflect the economic potential of the Selyshchanskyi placer, namely the distribution of the vertical stock of ilmenite and the integral index. The vertical stock of ilmenite is a value that characterizes its amount in a vertical cross-section, which corresponds to 1 m2 of the deposit area and a height corresponding to the thickness of the productive stratum. This parameter determines the total reserves of the deposit. The integral index is calculated as the difference between the conditional cost of ilmenite concentrate and the costs of performing excavation works and processing the productive layer. The conducted research made it possible to outline the priority area for development, located in the northwestern part of the placer, within the limits of the Northern deposit, which in today’s realities can be profitable.
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