Guduchkina Olga V. RussiaKogalym“KolgalimNIPIneft” branch of LLC “Lukoil-Engineering”, Strl. Republic, 143A, Tyumen, Tyumen region, 625048техник 1-й категории Отдела первичной обработки и хранения кернаguduolga@yandex.ru Author's articles Lithogeochemical Properties оf Terrigenous Rocks of Sortymsky Suite of Pyakyakhinskoye Field (North of Western Siberia)