TY JOUR TI Geomorphological and Isotope-Geochemical Methods in Assessing the Gas Potential of a Territory (Using the Example of the Angara-Lena Oil and Gas Region) KW gas potential forecasting KW Eastern Siberia KW geomorphology KW morphometric method KW isotope analysis of methane carbon KW macroscopic fracturing KW gas field preservation JO Russian Journal of Earth Sciences AU Smirnov, A.S. AU Nourgaliev, D.K. AU Chernova, I.Y. AU Ziganshin, E.R. PY 2024 IS 24 PB Geophysical Center of the Russian Academy of Sciences