ADMAP — A Digital Magnetic Anomaly Map of the Antarctic

Golynsky, Alexander; Chiappini, M.; Damaske, Detlef; Ferraccioli, Fausto; Finn, Carol A.; Ishihara, Takemi; Kim, Hyung Rae; Kovacs, L.; Masolov, V. N.; Morris, Peter; Frese, Ralph von

doi:10.1007/3-540-32934-x_12

Cited by 49 publications

(96 citation statements)

References 19 publications

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“…We further suggest here that the intact craton margin, developed in the Neoproterozoic, (Milligan and Tarlowski, 1999) (Magnetic map of Australia is copyrighted; Australian Geological Survey Organisation, 1999.) and rotated Antarctic aeromagnetic data (Chiappini et al, 2002;Golynsky et al, 2001;Studinger et al, 2004) with Australia fixed in a Gondwana reconstruction (Lawver et al, 2003). Grid lines represent map position in meters in the rotated coordinate system.…”

Section: Discussionmentioning

confidence: 99%

“…1) (Bozzo et al, 1997). Scattered magnetic profiles (Golynsky et al, 2001) and the Aerotam (Studinger et al, 2004) and ITASE transects (Fig. 1) show high-amplitude (700-3000 nT) anomalies over the polar plateau adjacent to the Transantarctic Mountains.…”

Section: Aeromagnetic Signatures Of the Mawson Block And Adjacent Regmentioning

confidence: 98%

“…The extensive coverage and high resolution of aeromagnetic data for Australia (Milligan and Tarlowski, 1999) contrast sharply with data from Antarctica (Golynsky et al, 2001), such that only gross comparisons can be made. Despite the variance in survey flight characteristics, broadly similar magnetic anomaly patterns can be identified.…”

Section: Interpretation Of Magnetic Anomaly Datamentioning

confidence: 99%

“…Aeromagnetic data (flight line spacing ~4500-10,000 m) from northern Victoria Land, Antarctica (Chiappini et al, 2002;Golynsky et al, 2001;Studinger et al, 2004), display prominent magnetic highs (P's, Fig. 1) averaging 200-500 nT over the Ross Orogen/TAM region, primarily related to exposed and buried gabbroic and dioritic intrusions that form the southern continuation of the Gondwana-margin magmatic arc in Australia Ferraccioli et al, 2003;Finn et al, 1999).…”

Section: Aeromagnetic Signatures Of the Mawson Block And Adjacent Regmentioning

confidence: 99%

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Scouting Craton’s Edge in Paleo-Pacific Gondwana

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The geology of the ice-covered interior of the East Antarctic shield is completely unknown; inferences about its composition and history are based on extrapolating scant outcrops from the coast inland. Although the shield is clearly composite in nature, a large part of its interior has been Paleoproterozoic granites and Meso-to Neoproterozoic mafic igneous rocks are associated with highamplitude, broad-wavelength positive aero-and satellite-magnetic anomalies. The same types of magnetic anomalies can be traced to ice-covered Wilkes Land, Antarctica, and are interpreted to signify similar rocks. However, the diagnostic satellite magnetic high ends ~800 km south of the Antarctic coast, suggesting that the Mawson block is smaller than first proposed and that the remaining East

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Section: Discussionmentioning

confidence: 99%

Section: Aeromagnetic Signatures Of the Mawson Block And Adjacent Regmentioning

confidence: 98%

Section: Interpretation Of Magnetic Anomaly Datamentioning

confidence: 99%

Section: Aeromagnetic Signatures Of the Mawson Block And Adjacent Regmentioning

confidence: 99%

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Scouting Craton’s Edge in Paleo-Pacific Gondwana

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“…The first generation of the magnetic anomaly map of Antarctica reveals terranes of varying ages, including Proterozoic-Archaean cratons, Proterozoic-Palaeozoic mobile belts, Palaeozoic-Cenozoic magmatic arc systems and other important crustal features (Golynsky et al, 2006a). The map delineates intra-continental rifts and major rifts along the Antarctic continental margin, the regional extent of plutons and volcanics, such as the Ferrar dolerites and Kirkpatrick basalts.…”

Section: Introductionmentioning

confidence: 99%

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2007

Mag anomaly map

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Abbot Ice Shelf, structure of the Amundsen Sea continental margin and the southern boundary of the Bellingshausen Plate seaward of West Antarctica

Cochran

Tinto

Bell

2015

Geochem Geophys Geosyst

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Inversion of NASA Operation IceBridge airborne gravity over the Abbot Ice Shelf in West Antarctica for subice bathymetry defines an extensional terrain made up of east-west trending rift basins formed during the early stages of Antarctica/Zealandia rifting. Extension is minor, as rifting jumped north of Thurston Island early in the rifting process. The Amundsen Sea Embayment continental shelf west of the rifted terrain is underlain by a deeper, more extensive sedimentary basin also formed during rifting between Antarctica and Zealandia. A well-defined boundary zone separates the mildly extended Abbot extensional terrain from the deeper Amundsen Embayment shelf basin. The shelf basin has an extension factor, β, of 1.5–1.7 with 80–100 km of extension occurring across an area now 250 km wide. Following this extension, rifting centered north of the present shelf edge and proceeded to continental rupture. Since then, the Amundsen Embayment continental shelf appears to have been tectonically quiescent and shaped by subsidence, sedimentation, and the advance and retreat of the West Antarctic Ice Sheet. The Bellingshausen Plate was located seaward of the Amundsen Sea margin prior to incorporation into the Antarctic Plate at about 62 Ma. During the latter part of its independent existence, Bellingshausen plate motion had a clockwise rotational component relative to Antarctica producing convergence across the north-south trending Bellingshausen Gravity Anomaly structure at 94°W and compressive deformation on the continental slope between 94°W and 102°W. Farther west, the relative motion was extensional along an east-west trending zone occupied by the Marie Byrd Seamounts.Key Points:Abbot Ice Shelf is underlain by E-W rift basins created at ∼90 Ma Amundsen shelf shaped by subsidence, sedimentation, and passage of the ice sheet Bellingshausen plate boundary is located near the base of continental slope and rise

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ADMAP — A Digital Magnetic Anomaly Map of the Antarctic

Cited by 49 publications

References 19 publications

Scouting Craton’s Edge in Paleo-Pacific Gondwana

Scouting Craton’s Edge in Paleo-Pacific Gondwana

Untitled

Abbot Ice Shelf, structure of the Amundsen Sea continental margin and the southern boundary of the Bellingshausen Plate seaward of West Antarctica

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