TY JOUR TI Application of Neural Networks for Image Analysis of Thin-Section Areas of Quartz Sandstone with Carbonate Cement KW petrographic thin section KW mineral grain segmentation KW sedimentary petrography KW deep learning KW artificial intelligence JO Russian Journal of Earth Sciences AU Ahmetov, R.F. AU Murtazin, T.A. AU Morozov, V.P. AU Tumakov, D.N. AU Sudakov, V.A. AU Nourgaliev, D.K. AU Kayumov, Z.D. PY 2026 IS 26 PB Geophysical Center of the Russian Academy of Sciences