A.A. KIRSANOV, K.L. LIPIYAYNEN, M.YU. SMIRNOV, G.A. KIRSANOV, A.V. ZOLOTUKHINA (VSEGEI)

Localization of zones of hydrothermal-metasomatic rocks using methods of spectral analysis of hyperspectral satellite images: Case study of gold targets in the Ulinsky Trough, Khabarovsk Territory

Technological aspects of using the spectral analysis of hyperspectral data are discussed. They make it possible to identify areas of hydrothermal-metasomatic wallrock alteration during forecasting and at initial stages of exploration. A new technology was used in the studies, including the creation of a library of spectra of reference altered rocks widespread in the area of a known deposit or an ore field, spectral analysis of hyperspectral remote basis, identification and analysis of the spatial distribution of hydrothermal-metasomatic rocks. The sequence of studies is given on the example of gold targets of the Ulinsky Trough, the Okhotsk-Chukchi Volcanic Belt (Khabarovsk Territory) located within the O-­54­-XIV sheet. As a result of the work, spectrometric anomalies were identified as indicators of ore occurrences, which made it possible to localize exploration areas.
Keywords: wallrock hydrothermal-metasomatic alterations, gold mineralization, ASTER satellite image, hyperspectral remote basis, rock spectra, spectral analysis technology.