scholarly journals Gas Hydrates Accumulations on the South Shetland Continental Margin: New Detection Possibilities

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
V. D. Solovyov ◽  
V. G. Bakhmutov ◽  
I. N. Korchagin ◽  
S. P. Levashov ◽  
N. A. Yakymchuk ◽  
...  
Keyword(s):  
Data Processing ◽  
Continental Margin ◽  
Satellite Data ◽  
Gas Hydrates ◽  
Oil And Gas ◽  
West Antarctica ◽  
The South ◽  
Deposit Type ◽  
Pulsed Electromagnetic ◽  
The Antarctic

The results of investigations in 2006–2010 for hydrocarbon and gas hydrates on the Antarctic Peninsula continental margin are given. In 2004 and 2006, the marine geoelectric researches by methods of forming a short-pulsed electromagnetic field (FSPEF) and vertical electric-resonance sounding (VERS) had been conducted in this region. The “deposit” type anomaly was mapped by FSPEF survey, and anomalous polarized layers of “hydrocarbon deposit” type were chosen by VERS sounding within this anomaly on Antarctic margin in the region of UAS “Academician Vernadsky.” Anomalous zones of “gas hydrate deposit” type were detected on the South Shetland margin due to the special technology of satellite data processing and interpretation using. These results confirm the high gas hydrates potential of the West Antarctica region. Some practical results of the experimental approbation of these original technologies for the “direct” prospecting and exploration of hydrocarbon (HC) and gas hydrates accumulations in different oil-and-gas bearing basins of Russia and Gulf of Mexico are proposed. The integration of satellite data processing and materials of FSPEF-VERS methods enable improving their efficiency for different geological and geophysical problems solving.

A fission track thermochronological study of King George and Livingston islands, South Shetland Islands (West Antarctica)

2004 ◽  
Vol 16 (2) ◽  
pp. 191-197 ◽  
Author(s):  
I. SELL ◽  
G. POUPEAU ◽  
J.M. GONZÁLEZ-CASADO ◽  
J. LÓPEZ-MARTÍNEZ
Keyword(s):  
South Shetland Islands ◽  
West Antarctica ◽  
The South ◽  
North West ◽  
The North ◽  
Early Oligocene ◽  
Barton Peninsula ◽  
Bransfield Basin ◽  
Back Arc ◽  
The Antarctic

This paper reports the dating of apatite fission tracks in eleven rock samples from the South Shetland Archipelago, an island arc located to the north-west of the Antarctic Peninsula. Apatites from Livingston Island were dated as belonging to the Oligocene (25.8 Ma: metasediments, Miers Bluff Formation, Hurd Peninsula) through to the Miocene (18.8 Ma: tonalites, Barnard Point). Those from King George Island were slightly older, belonging to the Early Oligocene (32.5 Ma: granodiorites, Barton Peninsula). Towards the back-arc basin (Bransfield Basin), the apatite appears to be younger. This allows an opening rate of approximately 1.1 km Ma−1 (during the Miocene–Oligocene interval) to be calculated for Bransfield Basin. Optimization of the apatite data suggests cooling to 100 ± 10°C was coeval with the end of the main magmatic event in the South Shetland Arc (Oligocene), and indicates slightly different tectonic-exhumation histories for the different tectonic blocks.

scholarly journals Gas Hydrates in Antarctica

2020 ◽  
Author(s):  
Michela Giustiniani ◽  
Umberta Tinivella
Keyword(s):  
Continental Margin ◽  
Gas Hydrates ◽  
Gas Hydrate ◽  
Ross Sea ◽  
Point Of View ◽  
The South ◽  
Bottom Simulating Reflector ◽  
Hydrate Reservoir ◽  
Wilkes Land ◽  
Gas Hydrate Reservoir

Few potential distributing areas of gas hydrates have been recognized in literature in Antarctica: the South Shetland continental margin, the Weddell Sea, the Ross Sea continental margin and the Wilkes Land continental margin. The most studied part of Antarctica from gas hydrate point of view is the South Shetland margin, where an important gas hydrate reservoir was well studied with the main purpose to determine the relationship between hydrate stability and environment effects, including climate change. In fact, the climate signals are particularly amplified in transition zones such as the peri-Antarctic regions, suggesting that the monitoring of hydrate system is desirable in order to detect potential hydrate dissociation as predicted by recent modeling offshore Antarctic Peninsula. The main seismic indicator of the gas hydrate presence, the bottom simulating reflector, was recorded in few parts of Antarctica, but in some cases it was associated to opal A/CT transition. The other areas need further studies and measurements in order to confirm or refuse the gas hydrate presence.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 2(11)2011 (2(11)) ◽  
pp. 164-166
Author(s):  
S. P. Levashov ◽  
◽  
M. A. Yakymchuk ◽  
I. M. Korchahin ◽  
◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Data Processing ◽  
Satellite Data ◽  
Pulsed Electromagnetic Field ◽  
Electric Resonance ◽  
Ore Minerals ◽  
Pulsed Electromagnetic

The results of experimental approbation of geoelectric methods of forming short-pulsed electromagnetic field (FSPEF) vertical electric-resonance sounding (VERS) and the technology of satellite data processing and interpretation for the "direct" prospecting the ore minerals and water-bearing reservoirs are analyzed.

Chapter 3.1a Antarctic Peninsula and South Shetland Islands: volcanology

2021 ◽  
pp. M55-2018-52
Author(s):  
Philip T. Leat ◽  
Teal R. Riley
Keyword(s):  
Antarctic Peninsula ◽  
Continental Margin ◽  
Volcanic Rocks ◽  
South Shetland Islands ◽  
West Antarctica ◽  
The South ◽  
Shetland Islands ◽  
The North ◽  
Climate Cooling ◽  
Tectonic Features

AbstractThe voluminous continental margin volcanic arc of the Antarctic Peninsula is one of the major tectonic features of West Antarctica. It extends from the Trinity Peninsula and the South Shetland Islands in the north to Alexander Island and Palmer Land in the south, a distance of c. 1300 km, and was related to east-directed subduction beneath the continental margin. Thicknesses of exposed volcanic rocks are up to c. 1.5 km, and the terrain is highly dissected by erosion and heavily glacierized. The arc was active from Late Jurassic or Early Cretaceous times until the Early Miocene, a period of climate cooling from subtropical to glacial. The migration of the volcanic axis was towards the trench over time along most of the length of the arc. Early volcanism was commonly submarine but most of the volcanism was subaerial. Basaltic–andesitic stratocones and large silicic composite volcanoes with calderas can be identified. Other rock associations include volcaniclastic fans, distal tuff accumulations, coastal wetlands and glacio-marine eruptions.Other groups of volcanic rocks of Jurassic age in Alexander Island comprise accreted oceanic basalts within an accretionary complex and volcanic rocks erupted within a rift basin along the continental margin that apparently predate subduction.

scholarly journals Gas hydrates of the Antarctic continental margin bottom structures (by geophysical data)

2015 ◽  
pp. 83-86
Author(s):  
S.P. Levashov ◽  
◽  
N.A. Yakimchuk ◽  
I.N. Korchagin ◽  
V.G. Bakhmutov ◽  
...  
Keyword(s):  
Continental Margin ◽  
Gas Hydrates ◽  
Geophysical Data ◽  
Bottom Structures ◽  
The Antarctic

scholarly journals Exploration And Exploitation Of Non-Living Natural Resources On The Continental Shelf Beyond 200 Nautical Miles: A Status Review

2020 ◽  
Vol 70 (1) ◽  
pp. 17-28
Author(s):  
Mazlan Madon ◽  
Keyword(s):  
Natural Resources ◽  
Continental Shelf ◽  
Continental Margin ◽  
Gas Hydrates ◽  
Deep Sea ◽  
Oil And Gas ◽  
Hydrocarbon Exploration ◽  
Exploration And Exploitation ◽  
Average Width ◽  
Geological Conditions

Activities by coastal States in relation to the exploration and exploitation of non-living natural resources (namely hydrocarbons and deep-sea minerals) on the continental shelf beyond 200 nautical miles (M) from their territorial sea baselines are reviewed. Geological conditions dictate such that hydrocarbons are likely to occur where there are thick accumulations of sediments (at least 2-3 km is needed for organic matter to generate significant amounts of hydrocarbons), whereas deep-sea minerals are found on or beneath the seabed of the deep oceans, which are generally “starved” of sediment. Thus, in general, sites for hydrocarbon exploration and for deep-sea mineral exploration are unlikely to overlap. On a ‘normal’ geological shelf with an average width of say ~60-100 km, hydrocarbon exploration is carried out generally within the 200 M limit of the Exclusive Economic Zone (EEZ) of the coastal State. Within the last decade, however, necessitated by depleting resources in the shallow waters of the shelf and slope, exploration has gradually moved from the geological shelf (water depth typically < 200 m) further out into deeper waters, and in some cases, beyond the 200 M limit. Thus far, only in a few places is oil and gas exploration being carried out on the continental shelf beyond 200 M. Examples include Australia, New Zealand, Norway, Argentina and Canada. Such activities mainly involve geological and geophysical investigations and assessment of the hydrocarbon potential, while some have resulted in commercial production. Besides the conventional hydrocarbons (oil and gas), continental margin sediments may also host significant accumulations of gas hydrates, which are regarded as a potentially important energy resource of the future. Along non-polar continental margins, gas hydrates are generally found beneath the continental slope and the continental rise, i.e. beyond the continental shelf proper, in water depths typically greater than 500 m but still mainly within 200 M of the territorial sea baselines. Where the continental margin is exceptionally wide, however, gas hydrates may occur in areas beyond the 200 M limit, on the extended continental shelf.

European geological initiative for the Shackleton Range

1990 ◽  
Vol 2 (3) ◽  
pp. 265-266
Author(s):  
F. Tessensohn ◽  
M.R.A. Thomson
Keyword(s):  
Continental Margin ◽  
West Antarctica ◽  
Structural Orientation ◽  
The Pacific ◽  
Dronning Maud Land ◽  
Pacific Margin ◽  
East And West ◽  
The Antarctic ◽  
The Relationship ◽  
Geological Position

The Shackleton Range occupies a key geological position in Antarctica (Fig. 1). Its location, at the edge of the continental craton between the mobile belts of the Transantarctic Mountains (TAM) and the stable platform of Dronning Maud Land (Neuschwabenland), and its geological constitution offer possibilities for: understanding the nature of the ‘Pacific’ margin of the Antarctic craton during the Palaeozoic, distinguishing between subduction- and collision-related tectonics at an ancient continental margin, and contributing to the debate on the relationship between East and West Antarctica. The structural orientation of the range, at right angles to the trend of the TAM, has puzzled geologists ever since its discovery.

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