Мурманская МИЛЯ. 2018 г. №4.

EXPLORATIONS mln t out of them is oil and 17.7 mln t is condensate. The Medvezhye (364.8) and Shatskogo (103.7) highs in the Shtokman- Luninskaya oil-and-gas region are speci­ fied by the greatest inferred resources. In the South Barents oil-and-gas region the most prospective areas are the Tulomskaya (113.3), Severo-Tulomskaya (120.14) and Yuzhno-Tulomskaya (193.9) structures. In the Svalbard potential oil-and-gas region the Fersman structure (its’ eastern half is in the limits of the sheet) is considered the most prospective one. Ultimate potential resources of the sheet including field reserves account for 15.813 billion TOE. In 2015-2016 offshore works were per­ formed in the East Barents Sea (sheets S-39, 40) for additional study of the water area (seismoacoustic survey - 4,250 line km, seismic refraction survey - 347 line km, bot­ tom sampling - 50 systems). The data ob­ tained will allow updating of deep structure and material genetic composition of bottom deposits, estimating anew the mineral re­ sources within the area of sheets S-39,40. The work is to be finished (the authors’ set) in 2019. In 2017 the works on sheets of series S (41, 42) in the Kara Sea were launched. Sheet S-43 stays uncovered by the third generation maps. The works on these sheets are recommended for performance in 2018­ 2020. The geological mapping objective on the East Arctic shelf is the coverage by the third generation sheets of series R in the East Siberian and Chukchi seas. The maps for the marine part of these sheets were created without additional study (R-56, R-57) or were not created at all (R-58, R-59, R-60). Besides the necessity for creation of mutually adjusted marine and land maps this arises from the high resources potential of this zone: oil and gas, many other solid mine­ rals which are in a very short supply. Thus, it is expected that by 2020 the Rus­ sian Arctic shelf will be mapped at a scale of 1:1,000,000 almost all over. Prospective directions of furthe r works. What are the possible directions and pros­ pects of development of state geological map­ ping of the Russian territory in general and its’ continental shelf in particular in future? In opinion of VSEGEI scientists and ex­ perts next stage objective is a transition from the fixed scale sheet map creation con- ducted within the framework of time phases (map generations) to creation of seamless polyscaled geological maps updated by monitoring [Petrov et al., 2016]. Seamless fragments at a scale of 1:1,000,000 prepared by VSEGEI (since 2009) contained a geological map and a mineral map only. For the shelf areas there were drawn situation records on the Karelia and Kola region as well as on the north-eastern regions of Russia. Seismostratigraphic and structural tectonic maps are prepared for platform territories with development of high capacity sedimentary basins exemplified by the Siberian platform. Since 2015 the seam­ less map of Central and West Arctic is being created taking into account the data of bot­ tom seismic survey. A prototype of seamless maps has been created in MAGE since 2000 in the form of situation records each time another sheet is prepared, due to the enthusiasm of cartog­ rapher N.V. Markina. Those seamless maps included almost the whole set of maps: geo­ logical, the map of Quaternary formations, lithological and mineral maps. Consolidat­ ed set included the oil and gas forecast Fig. 2. Geological map of the West Arctic shelf of Russia (compiled by N.V. Markina. in JSC MAGE according to the Gosgeo lkarta-1000 data). Рис. 2. Геологическая карта Западно-Арктиче­ ского шельфа России (составлена Н.В. Марки­ ной в ОАО МАГЭ по материалам ГК -1000). MURMANSK MILE • 4-2018