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Detailed Geological Mapping of the Olon-Ovoot Gold Ore Cluster (Southern Mongolia) Based on the Interpretation of Satellite Images of Medium and High Spatial Resolution

  • USE OF SPACE INFORMATION ABOUT THE EARTH GEOLOGICAL STUDIES FROM SPACE
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Abstract

This article presents the results of an interpretation of the territory of the Olon-Ovoot ore cluster using medium and high spatial resolution satellite images. The interpretation is based on the Sentinel-2 image, which has been orthorectified and reduced to a common spatial resolution (10 m). Indices of iron hydroxide and iron silicate in Sentinel-2 images are used for selecting areas. The subpixel structure is analyzed using high spatial resolution satellite images from the Google Earth computer program in order to identify the areas of concentration of quartz-carbonate veins in Sentinel-2 images. The structural and morphological interpretation with lineament extraction has not required spectral domain analysis in high-resolution images. Remote sensing data interpretation have made it possible to significantly clarify the geological structure of the territory and improve from the mapping scale from 1 : 200 000 to 1 : 20 000 for key areas. The fusion of satellite images of different functional scales has led to an order of magnitude increase in mapped geological features (e.g., dikes). Detailed mapping of the territory makes it possible to come close to geo-information modeling of geological structural elements, i.e., leading indicators.

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ACKNOWLEDGMENTS

We thank Google Earth for the free high-resolution satellite images used in noncommercial scientific research presented in this article. We are grateful to PhD E.A. Naumov and N.N. Dobretsov for discussions and assistance.

Funding

This work was carried out as part of the State Task of the Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, and supported by the Ministry of Science and Higher Education of the Russian Federation.

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Authors and Affiliations

  1. Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    M. V. Zadorozhnyy, I. D. Zolnikov & N. V. Glushkova

  2. Novosibirsk State University, Novosibirsk, Russia

    I. D. Zolnikov & N. V. Glushkova

Authors
  1. M. V. Zadorozhnyy
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  2. I. D. Zolnikov
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  3. N. V. Glushkova
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Correspondence to N. V. Glushkova.

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Translated by O. Pismenov

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Zadorozhnyy, M.V., Zolnikov, I.D. & Glushkova, N.V. Detailed Geological Mapping of the Olon-Ovoot Gold Ore Cluster (Southern Mongolia) Based on the Interpretation of Satellite Images of Medium and High Spatial Resolution. Izv. Atmos. Ocean. Phys. 56, 1136–1145 (2020). https://doi.org/10.1134/S0001433820090261

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