S.P. Levashov, N.A. Yakimchuk, I. N. Korchagin, Yu. M. Pishchalnyi, V. G. Bakhmutov, V.D. Soloviev, D. N. Bozhezha. NEW RESULTS OF GEOPHYSICAL MAPPING HYDROCARBON ACCUMULATIONS ON THE SHELF AND CONTINENTAL SLOPE OF WESTERN ANTARCTICA

S.P. Levashov 1,2, N.A. Yakimchuk 1,2, I. N. Korchagin 3, Yu. M. Pishchalnyi 1, V. G. Bakhmutov 3, V.D. Soloviev 3, D. N. Bozhezha 2
1 Institute of Applied Problems of Ecology, Geophysics and Geochemistry, Kiev
2 Center for Management and Marketing in the Earth Sciences, IGN NASU, Kiev
3 Institute of Geophysics of NAS of Ukraine, Kyiv
NEW RESULTS OF GEOPHYSICAL MAPPING HYDROCARBON ACCUMULATIONS ON THE SHELF AND CONTINENTAL SLOPE OF WESTERN ANTARCTICA 
New results of geoelectric studies of hydrocarbon potential of the continental margin of the Antarctic Peninsula structures that obtained during the season of works by 17 Ukrainian Antarctic Expedition (March 2012) are given. The geoelectric researches by methods of forming a shortpulsed electromag netic field (FSPEF) and vertical electricresonance sounding (VERS) have been conducted from RV «Polar Pioneer» in this region. Anomalies of «oil pool» type within a total area of about 900 km2 and three anomalous zones of «deposit of gas hydrates» type were found and mapped in the area of UAS «Akademic Vernadsky». These data confirm the assumption about the possible new oil province exis tence in this part of West Antarctica region. Parameters of two anomalously polarized «gas hydrate» reservoir with average thickness 100—500 m were defined. The presence of a number of satellite anom alous zones beyond the seismic BSRzones shows that the actual reserves of gas hydrates and free gas in the South Shetland Island margin structures are much higher than previously calculated. These data allow including the study area to one of the most promising areas of gas hydrate accumulations of the continental margin of West Antarctica bottom structures. 

Ris. 1. Raspolozhenie profilej vertikal'nogo ehlektrorezonansnogo zondirovaniya (VEHRZ) v rajone proliva Drejka, YUzhnyh SHetlandskih i Folklendskih ostrovov (17 UAS, 2012g). 1 — shkala glubin i vysot (metry); 2—5 — profili zondirovaniya po hodu sudna; 6 — Ukra inskaya antarkticheskaya stanciya «Akademik Vernadskij»; 7 — tektonicheskie narusheniya 
Ris. 2. Karta geoehlektricheskih anomal'nyh zon tipa «neftyanaya zalezh'» na shel'fe Antarkticheskogo poluostrova v rajone UAS «Akademik Vernadskij» (po rezul'tatam sezonnyh ra bot 17 UAS, 2012 g.): 1 — shkala znachenij maksimal'nogo plastovogo davleniya v kollektorah; 2 — tochki s"emki metodom SKIP; 3 — punkty VEHRZ; 4 — polozhitel'nye znacheniya s"emki metodom SKIP po rezul'tatam sezonnyh rabot 2006 g. 
Ris. 3. Vertikal'nyj razrez geoehlektricheskih anomal'nyh zon tipa «neftyanaya zalezh'» (Oil1 — Oil4) vdol' profilya 1 (A) i profilya 2 (B) na shel'fe Antarkticheskogo poluostro va v rajone UAS «Akademik Vernadskij»: a — grafik znachenij maksimal'nogo plastovogo davleniya v kollektorah; b — vertikal'nyj geoehlektricheskij razrez. 1 — zony anomal'no polyarizovannyh plastov tipa «neftyanaya zalezh'»; 2 — punkty VEHRZ 
Ris. 4. Vertikal'nyj razrez zemnoj kory vdol' profilya 3—3a (2004 g.) po dannym VEHRZ: 1 — voda; 2 — donnye osadki ponizhennogo geoehlektricheskogo soprotivleniya; 3 — vtoroj osadochnyj sloj povyshennogo geoehlektricheskogo soprotivleniya (oblomochnyj material, zony drobleniya fundamenta); 4 — porody fundamenta; 5 — zony povyshennoj polyariza cii i geoehlektricheskogo soprotivleniya v tele fundamenta (zony daek); 6 — zony poni zhennogo geoehlektricheskogo soprotivleniya v tele fundamenta (zony drobleniya) 
Ris. 5. Kontury geoehlektricheskih anomal'nyh zon tipa «zalezh' gazogidratov» na shel'fe Antarkticheskogo poluostrova v rajone UAS «Akademik Vernadskij» (po rezul'tatam se zonnyh rabot 17 UAEH). 1 — shkala absolyutnyh otmetok glubin i vysot (metry); 2 — linii vertikal'nyh geoehlektricheskih razrezov; 3 — ukrainskaya antarkticheskaya stanciya «Akade mik Vernadskij»; 4 — anomal'nye zony tipa «zalezh' gazogidratov»; 5 — punkty VEHRZ 
Ris. 6. Vertikal'nyj razrez vdol' geoehlektricheskih anomal'nyh zon tipa «zalezh' gazogidratov» (Gh1, Gh2) na shel'fe Antarkticheskogo poluostrova v rajone UAS «Akademik Vernadskij» (po rezul'tatam sezonnyh rabot 17 UAS). Profili 1 (A) i profil' 2 (B). 1 — zona anomal'no polyarizovannyh plastov tipa «zalezh' gazogidratov»; 2 — punkty VEHRZ. Polozhenie profilej 1, 2 pokazano na ris. 5 
Ris. 7. Karta geoehlektricheskih anomal'nyh zon tipa «zalezh' gazogidratov» na materikovom sklone vblizi YUzhnyh SHetlandskih ostrovov (po rezul'tatam obrabotki i deshifrirova niya dannyh DZZ i sezonnyh rabot 17 UAEH): 1 — anomal'nye zony tipa «zalezh' gazogidratov» po rezul'tatam obrabotki i deshifrirovaniya dannyh DZZ; 2 — profil' zondirovaniya VEHRZ; 3 — anomal'nye zony tipa «zalezh' gazogidratov», zaregistrirovannye morskoj geo ehlektricheskoj s"emkoj; 4 — tochki s"emki metodom SKIP; 5 — punkty VEHRZ; 6 — polozhe nie sejsmicheskih profilej MOVOGT [19]. KSL934 — sejsmicheskij profil' cherez ano mal'nuyu zonu Gh1, po [19]. 197214 — sejsmicheskij profil', po [20] 
Ris. 8. Vertikal'nyj razrez vdol' geoehlektricheskih anomal'nyh zon tipa «zalezh' gazogidratov» (Gh1, Gh2) na materikovom sklone vblizi Yuzhnyh Shetlandskih ostrovov (po rezul'tatam sezonnyh rabot 17 UAEH): 1 — zony anomal'no polyarizovannyh plastov tipa «zalezh' gazogidratov»; 2 — punkty VEHRZ. Polozhenie anomal'nyh zon pokazano na ris.7 
Ris. 9. Sejsmicheskij razrez MOVOGT vdol' profilya KSL934, na kotorom vydeleny kont rastnaya BSR-zona (A) i raspolozhennaya pod nej BGRzona (B), sootvetstvuyushchaya podoshve zony svobodnogo gaza [19]. Polozhenie profilya KSL934 pokazano na ris. 7 

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