from 01.01.1979 to 01.01.2025
Russian Federation
Russian Federation
Sankt-Petewrsburg, St. Petersburg, Russian Federation
St. Petersburg, Russian Federation
UDC 55
UDC 550.34
UDC 550.383
CSCSTI 37.01
CSCSTI 37.15
CSCSTI 37.25
CSCSTI 37.31
CSCSTI 38.01
CSCSTI 36.00
CSCSTI 37.00
CSCSTI 38.00
CSCSTI 39.00
CSCSTI 52.00
Russian Classification of Professions by Education 05.00.00
Russian Library and Bibliographic Classification 26
Russian Trade and Bibliographic Classification 63
BISAC SCI SCIENCE
Interpretation of modern aeromagnetic and radar data, primarily from Russian surveys in East Antarctica between 88°–102°E, has resulted in a tectonic map of Precambrian provinces, including two protocratonic domains and two orogens of different ages. The crust of the Charcot Province is presumably composed of Mesoarchean tonalite-gneisses of Cape Charcot (3003 ± 8 Ma), which underwent metamorphism at ~2890 Ma and a zircon-forming episode at ~550 Ma. The West Mawson protocraton province is identified based on magnetic data and is represented by terranes that may have accreted to the western edge of the East Mawson craton in the Mesoproterozoic. The Wilkes Orogen correlates with metamorphic and intrusive rocks of the Bunger Hills, Highjump Archipelago, Obruchev Hills, and exposures in the lower reaches of the Denman Glacier, mostly associated with positive magnetic anomalies forming an elongated, segmented magnetic belt. The Rayner Orogen has a heterogeneous geological structure and can be subdivided into several tectonic zones with specific lithological compositions and slightly different geological histories. All previously proposed fault locations (sutures) between Indo-Antarctica and Australo-Antarctica are not reflected in either modern aeromagnetic data or bedrock topography. Most likely, it is located along the boundary between the Charcot craton and the Wilkes Orogen and corresponds to the Northcliffe Glacier. ADMAP-2 data allow tracing its continuation towards the southern Prince Charles Mountains and/or the subglacial Gamburtsev Mountains.
magnetic anomalies, radar data, magnetic properties, craton, province, fault, Kuunga suture
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32. Mikhalsky E. V., Tkacheva D. A., Skublov S. G., et al. Low-grade Sandow Group metasediments of the Denman Glacier area (East Antarctica): Chemical composition, age and provenance from U-Pb detrital zircon data, with some palaeotectonic implications // Polar Science. — 2020. — Vol. 26. — P. 100587. — https://doi.org/10.1016/j.polar.2020.100587. EDN: https://elibrary.ru/SFIZZP
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