Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin
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Інститут геофізики ім. С.I. Субботіна НАН України
2010
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| Zitieren: | Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin / V. Bakhmutov, V. Solovyov, I. Korchagin, S. Levashov, N. Yakymchuk, D. Bozhezha // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 12-15. — Бібліогр.: 3 назв. — англ. |
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irk-123456789-1011902016-06-01T03:03:07Z Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin Bakhmutov, V. Solovyov, V. Korchagin, I. Levashov, S. Yakymchuk, N. Bozhezha, D. 2010 Article Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin / V. Bakhmutov, V. Solovyov, I. Korchagin, S. Levashov, N. Yakymchuk, D. Bozhezha // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 12-15. — Бібліогр.: 3 назв. — англ. 0203-3100 http://dspace.nbuv.gov.ua/handle/123456789/101190 en Геофизический журнал Інститут геофізики ім. С.I. Субботіна НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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DSpace DC |
| language |
English |
| format |
Article |
| author |
Bakhmutov, V. Solovyov, V. Korchagin, I. Levashov, S. Yakymchuk, N. Bozhezha, D. |
| spellingShingle |
Bakhmutov, V. Solovyov, V. Korchagin, I. Levashov, S. Yakymchuk, N. Bozhezha, D. Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin Геофизический журнал |
| author_facet |
Bakhmutov, V. Solovyov, V. Korchagin, I. Levashov, S. Yakymchuk, N. Bozhezha, D. |
| author_sort |
Bakhmutov, V. |
| title |
Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin |
| title_short |
Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin |
| title_full |
Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin |
| title_fullStr |
Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin |
| title_full_unstemmed |
Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin |
| title_sort |
drake passage: crustal structure, tectonic evolution and new prognosis for local hc accumulations along the antarctic peninsula margin |
| publisher |
Інститут геофізики ім. С.I. Субботіна НАН України |
| publishDate |
2010 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/101190 |
| citation_txt |
Drake Passage: crustal structure, tectonic evolution and new prognosis for local HC accumulations along the Antarctic Peninsula margin / V. Bakhmutov, V. Solovyov, I. Korchagin, S. Levashov, N. Yakymchuk, D. Bozhezha // Геофизический журнал. — 2010. — Т. 32, № 4. — С. 12-15. — Бібліогр.: 3 назв. — англ. |
| series |
Геофизический журнал |
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2025-07-07T10:34:16Z |
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2025-07-07T10:34:16Z |
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| fulltext |
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Drake Passage: crustal structure, tectonic evolution
and new prognosis for local HC accumulations along
the Antarctic Peninsula margin
V. Bakhmutov1, V. Solovyov1, I. Korchagin1, S. Levashov2,
N. Yakymchuk2, D. Bozhezha2, 2010
1Institute of Geophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine
bakhm@igph.kiev.ua
2Institute of the Applied Problems of Ecology, Geophysics and Geochemistry,
National Academy of Sciences of Ukraine, Kiev, Ukraine
yakymchuk@karbon.com.ua
bozhezha@gmail.com
New geological and geophysical data that have
been obtained during last years for bottom struc-
tures of West Antarctica are of particular importance
for evolution and geodynamics processes of this
region understanding. The 2004 (9th) and 2006 (11th)
Ukrainian Antarctic expeditions acquired new geo-
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The VERS sounding data and geoelectric anomalous zone of the “hydrocarbon deposit” type in the Antarctic Peninsula region
(a): 1 — the sounding points; 2 — anomalous polarized layers of “hydrocarbon deposit” type; 3 — tectonic fracture zone. Map
of anomalous zones of «oil deposit” type in the Antarctic region (relative coordinates, near Ukrainian Antarctic Station
«Academician Vernadsky»), allocated by the satellite data special processing and interpretation results (b): 1 — the scale of
the anomalous response intensity; 2 — points of the anomalous response values determination; 3 — predicted tectonic
fractures; 4 — points of «deposit» type anomalies by geoelectric methods FSPEF and VERS.
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electrical data (‘short-impulse electromagnetic field
formation’ — FSPEF, and ‘vertical electric-resonance
sounding’ — VERS) along profiles across Drake
Passage with the aim of studying the crustal struc-
ture down to depths of >30 km. Obtained crustal
inhomogeneities could be connected with some
evolution stages of tectonic and magmatic proces-
ses at this region — the fluid regime, tectonic dis-
turbances and crush zones in basement and local
places of submarine volcanic activity too [Levashov
et al., 2006; Drake …, 2007]. Analysis has been
provided new data of the sedimentary horizons deep
structure and Moho crust-mantle discontinuity of
Drake Passage. Beneath the Drake Passage, Moho
is interpreted at shallow depths of 8—12 km and
more. Both Moho and the deeper layer show strong
variations in depth and thickness in the vicinity of
the Shackleton Fracture Zone (SFZ). It’s forming
was connected with episodes of Drake Passage
opening, which led to the final separation of the South
America and Antarctic continents. The trough sys-
tem near this zone was formed when stress field
regime was extensional and local rifting and sprea-
ding processes had been developed. SFZ is cha-
racterized by thickened oceanic crust, deformed by
deep local faults, which cut across layers 2 and 3
of the oceanic crust.
The gravity models show in detail the deep struc-
ture of the fracture zone and suggest that crustal
thickness remains approximately constant along
SFZ, whereas central valley of rifted West Scotia
Ridge shows crustal thinning. Obtained results as-
sure the no�Table role of continental fragments (ex-
tending from the northwestern Antarctic Peninsula
towards the Pacific margin of the south-western top
of South America) in crustal structural transforma-
tions and rifting processes at the central part of
Drake Passage. As oil and gas exploration activi-
ties are focused along continental margins, where
fragmenting and presumably petroleum deposit for-
mation has taken place, the FSPEF and VERS
geoelectric methods were used also in Antarctic
expeditions for the hydrocarbon (HC) resources pros-
pecting along the Antarctic Peninsula margin. Du-
ring the expedition one �deposit» type anomaly was
mapped by FSPEF survey in area not far from the
Ukrainian Antarctic Station «Academician Vernad-
sky»�[Drake …, 2007]. Some anomalous polarized
layers of «oil deposit» type were mapped by VERS
sounding in depth interval up to 3500 m. (Figure, a).
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The special method of satellite data processing and
interpretation for this anomaly region was applied.
Four relatively large anomalous zones of «oil de-
posit» type were identified and mapped within the
surveyed segment of the Antarctic Peninsula mar-
gin. The mapped (during 2006 expedition) geoelec-
tric anomaly of «oil deposit» type completely falls
into one of the anomalous zones that were selec-
ted by satellite data (Figure, b).
The multi-channel seismic data acquired on the
South Shetland margin [Jin et al., 2003] show that
Bottom Simulating Reflectors (BSRs) are wides-
pread in the area, implying large volumes of gas
hydrates. Satellite data over the site of BSR zones
extension, identified by seismic studies, have been
processed and interpreted. The various processing
parameters were analyzed during investigation that
allowed revealing and mapping the anomalous zone
of «gas hydrates deposit» type within this region. In
general, the revealed and mapped anomalous zone
of «gas hydrates deposit» type satisfactorily corre-
late with BSRs zones, defined by seismic data. The
anomalous zones of «gas deposit» and «oil depo-
sit» type were not detected there by the satellite
data processing and interpretation results.
Conclusions. New data about geodynamics and
Drake Passage earth’s crust structure have demon-
strated high efficiency of the VERS method using.
New prognosis for local HC accumulations along
the Antarctic Peninsula margin confirms the high
oil and gas potential perspectives of the Antarctic
Peninsula region.
References
Jin Y. K., Lee M. W., Kim Y., Nam S. H., Kim K. J. Gas
hydrate volume estimations on the South Shetland
continental margin, Antarctic Peninsula // Antarctic
Sci. — 2003. — 15, ��2. — P. 271—282. —
DOI: 10.1017/S0954102003001275.
Levashov S. P., Bakhmutov V. G., Korchagin I. N., Pi-
schaniy Yu. M., Yakymchuk N. A. Geoelectric inves-
tigations during the seasonal work of 11th Ukraini-
an Antarctic expedition // Geoinformatika. — 2006.
— ��2. — P. 24—33 (in Russian).
Levashov S. P., Yakymchuk N. A., Korchagin I. N., Ba-
khmutov V. G., Solovyov V. D., Bozhezha D. N. Drake
Passage and Bransfield Strait — new geophysical
data and modelling of the crustal structure, in Ant-
arctica // A Keystone in a Changing World — Online
Proc. of the 10th ISAES X. — USGS Open-File Re-
port. — 2007. — P. 1047.
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