Magnetic Anomalies of the Grove Mountains Region and Their Geological Significance

Golynsky, Alexander; Golynsky, Dmitry; Masolov, V. N.; Volnukhin, Vyacheslav S.

doi:10.1007/3-540-32934-x_11

Cited by 20 publications

(39 citation statements)

References 14 publications

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“…According to 305 results of seismic surveys presented by Huebscher et al (1996) and Leitchenkov and 306 Kudryavtzev (1997), the sediment thickness there varies from 2 to 14 km. Such large 307 sediment accumulations in that region were also confirmed from the magnetic study 308 conducted by Golynsky and Aleshkova (1997). According to the P-wave velocity diagram 309 for WAIS station (Chaput et al 2014), the thickness of sedimentary deposits in Bentley 310 depression is about 4 km.…”

Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 73%

Combined Gravimetric–Seismic Crustal Model for Antarctica

2017

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Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 73%

Combined Gravimetric–Seismic Crustal Model for Antarctica

2017

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“…This has been postulated in almost all published models [Martin and Hartnady, 1986;Kristoffersen and Haugland, 1986;Lawver et al, 1991;Cox, 1992;Elliot, 1992;Grunow, 1993b;Livermore and Hunter, 1996]. We used the Beattie Anomaly ( Figure 7a) and a strong magnetic anomaly along the Heimefrontfjella (SKA-Sverdrupfjella-KirvanveggenAnomaly; Golynsky and Aleshkova, 2000) as starting point for our model.…”

Section: Epmmentioning

confidence: 97%

“…Applying the different spreading directions and velocities of AFR and SAM, this breakup model implies no strike slip along the EE during the drift period. For the initial position of AFR relative to ANT we considered two pronounced magnetic anomalies along the Cape Fold Belt (Figure 7a, Beattie-A) and in DML (Figure 7a, western part of SKA) to be a continuous prebreakup feature [De Beer and Meyer, 1983;Corner and Groenewald, 1991;Golynsky and Aleshkova, 2000]. The Beattie Anomaly in southern Africa has a strike length of approximately 900 km.…”

Section: Antarctica-africamentioning

confidence: 99%

“…At this time only seafloor spreading in the RLS constrain our model. For the initial fit between AFR and ANT, pronounced magnetic anomalies on both continents are used [Corner and Groenewald, 1991;Golynsky and Aleshkova, 2000]. The possible connection (hatch area) between the Beattie Anomaly and the Sverdrupfjella-Kirvanveggen Anomaly (SKA, dashed line) is marked.…”

Section: Antarctica-africamentioning

confidence: 99%

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Timing and geometry of early Gondwana breakup

et al. 2003

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[1] The Mesozoic opening history of the Southern Ocean between South America, Africa, and Antarctica is one of the largest gaps in knowledge on the evolution of this region. Competing geodynamic models were published during the last two decades to explain the geophysical and geological observations. Here we report on aeromagnetic data collected along the East Antarctic coast during five seasons. These data provide new constraints on the timing and geometry of the early Gondwana breakup. In the Riiser-Larsen Sea/ Mozambique Basin, the first oceanic crust between Africa and Antarctica formed around 155 Ma. In the west the Weddell Rift propagated from west to east with a velocity of 63 km/Myr between chrons M19N and M17N. At chron M14N, South America and Africa finally were split off the Antarctic continent. Stretching in the area of the South Atlantic started at the latest from 155 Myr onward. The different spreading velocities and directions of South America and Africa created at chron M9N the first oceanic crust in the South Atlantic. A new model indicates that the Karoo and Dronning Maud Land magmatism occurred well before any new ocean floor was created and therefore the first formation of new oceanic crust cannot directly be related to a plume interaction.

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“…One key crustal block is the West Antarctic Ellsworth-Whitmore mountains crustal block (Elliot and Fleming, 2004); Dufek Intrusion (DI) (black/red check) (Ferris et al, 1998); Jurassic granites (red diamonds) (Storey et al, 1988b); Seismically imaged seaward dipping reflector sequences (SDR) (red hatch) (Kristoffersen et al, 2014); Orion, Andenes and Explora magnetic anomalies (OA, AA and EA) linked to Jurassic magmatism (Ferris et al, 2000;Golynsky and Aleshkova, 1997a)…”

Section: Introductionmentioning

confidence: 99%