Technology for geostructural forecasting of gold ore occurrences using the example of a section of the Verkhoyansk-Kolyma fold system (Bayag ore field, Yakutia)

Abstract

Listen

Translate article

Relevance. Additional exploration of Bayag gold-ore deposit (Republic of Sakha, Yakutia), requiring the localization of targets predicted for gold-sulphide occurrences of endogenous (hydrothermal) nature. Aim. Further approbation and finalizing of representative technology for interpretation of aeromagnetic survey results, using domestic unmanned aerial vehicle technology. In the context of the mentioned geological object and research goals, the research methods include the combined analysis of remote-sensing, geomorphological and aeromagnetic data based on the methods of qualitative and quantitative interpretations, which are invariant with regard to the kind of initial signal, as well as it is based on the direct and indirect forecast parameters. Used in this research interpretation methods are not dependent on the nature of initial scalar field, being measured instrumentally, and include relatively automated approaches for decoding the morphostructure of this field, its filtration and consideration of the relationship in the set of such fields of different genesis. The direct forecast parameters are supposed to be the extrapolation of reference sample within the experimental area. Indirect forecast criteria are related to pattern recognition without training and, besides the well-known classifications, they include the recalculations into quasi-elastic indicators of mining block – fragmentation parameter and stress concentrator position parameter. Results. Reduced to justifying the applicability of the method, tested by the authors, for extrapolation of quasi-periodic reference sample within the experimental area, based on pattern recognition with training and subsequent verification by geochemical estimation. The content of the conclusions is: 1) optimization of mapped target contours localized within ore-controlling tectonic zones; 2) possibility of applying predictive use of the property of quasi-periodic manifestation of structural-substantial anomalies as special case of wave structuring of the mining massif.