East-West Antarctic boundary in McMurdo sound

McGinnis, L.D.; Bowen, Rebecca; Erickson, J.; Allred, Barry J.; Kreamer, J.L.

doi:10.1016/0040-1951(85)90020-4

Cited by 44 publications

(12 citation statements)

References 3 publications

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“…However, over recent years, sea-ice (e.g. McGinnis et al, 1985;Bannister and Naish, 2002) and ice-shelf (e.g. Stern et al, 1991;Beaudoin et al, 1992;ten Brink et al, 1993; surveys have become increasingly viable, and have provided important data for regions of the VLB that are inaccessible to research ships.…”

Section: Multichannel Seismic Datamentioning

confidence: 98%

See 1 more Smart Citation

Seismic stratigraphy of the Plio-Pleistocene Ross Island flexural moat-fill: a prognosis for ANDRILL Program drilling beneath McMurdo-Ross Ice Shelf

Horgan

Naish

Bannister

et al. 2005

Global and Planetary Change

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Section: Multichannel Seismic Datamentioning

confidence: 98%

“…Beaufort Island and Ross Island) and led to the development of the Terror Rift (Cooper et al, 1987). Ross Island volcanic complex lies at the southern end of the Terror Rift (McGinnis et al, 1985) and is considered to be associated with the latest phase of rifting. The radial distribution about Mt.…”

Section: Tectonic and Stratigraphic Settingmentioning

confidence: 99%

Seismic stratigraphy of the Plio-Pleistocene Ross Island flexural moat-fill: a prognosis for ANDRILL Program drilling beneath McMurdo-Ross Ice Shelf

Horgan

Naish

Bannister

et al. 2005

Global and Planetary Change

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“…Within the West Antarctic Rift System, and immediately adjacent to the TAM lies the Victoria Land sedimentary basin (VLB, Fig. 1b), which has a sedimentary thickness of ∼14 km, including at least 4–5 km of Cenozoic sediments (McGinnis et al 1985; Cooper et al 1987). There is some evidence from seismic data of crustal thinning beneath the eastern flank of the VLB (Cooper et al 1997), and high heat flows are observed in the region (e.g.…”

Section: Introductionmentioning

confidence: 99%

Variations in crustal structure across the transition from West to East Antarctica, Southern Victoria Land

Bannister

Leitner

2003

Geophysical Journal International

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SUMMARY The crustal structure beneath Ross Island and the Transantarctic Mountains (TAM) in Southern Victoria Land, Antarctica, is inferred using non‐linear inversion of receiver functions, derived from teleseismic earthquake data. Intermediate‐period waveforms from more than 160 teleseismic earthquakes recorded between January 1994 and January 2000 were used in the analysis. The inversion results confirm a crustal thickness of 19–21 km beneath Ross Island, consistent with previous multichannel seismic work. In addition we observe a crustal thickness of 18–20 km beneath the Ross Sea coastline immediately adjacent to the TAM. Further inland, beneath the TAM, the estimated Moho depths range from 30–33 km (∼30 km from the coast) to 36–40 km (∼85 km from the coast), deepening away from the coast beneath the TAM. These results are in broad agreement with previous seismic and gravity interpretations. Beneath the TAM a sharp mid‐crustal discontinuity is present at 8–14 km depth beneath the eastern‐most stations, but absent on the western side of the TAM, indicating a spatial change in the mid‐crustal composition.

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“…In contrast to the Northern Basin, the Victoria Land Basin to the south shows an extensional thinning of the continental crust. Seismic reflection and gravity data indicate a 14 km deep, 150 km wide sedimentary basin [ Cooper et al , , Brancolini et al ., ] with a thinned lower crust to about 5 km thick [ Davey and Cooper , ; McGuiness et al , ], formed by about 95 km of extension [ Davey and De Santis , ]. South of the Victoria Land Basin and Ross Island, no major sedimentary/rift basin has been detected but data are sparse.…”

Section: Discussionmentioning

confidence: 99%

Synchronous oceanic spreading and continental rifting in West Antarctica

Davey

Granot

Cande

et al. 2016

Geophysical Research Letters

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Magnetic anomalies associated with new ocean crust formation in the Adare Basin off north‐western Ross Sea (43–26 Ma) can be traced directly into the Northern Basin that underlies the adjacent morphological continental shelf, implying a continuity in the emplacement of oceanic crust. Steep gravity gradients along the margins of the Northern Basin, particularly in the east, suggest that little extension and thinning of continental crust occurred before it ruptured and the new oceanic crust formed, unlike most other continental rifts and the Victoria Land Basin further south. A preexisting weak crust and localization of strain by strike‐slip faulting are proposed as the factors allowing the rapid rupture of continental crust.

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East-West Antarctic boundary in McMurdo sound

Cited by 44 publications

References 3 publications

Seismic stratigraphy of the Plio-Pleistocene Ross Island flexural moat-fill: a prognosis for ANDRILL Program drilling beneath McMurdo-Ross Ice Shelf

Seismic stratigraphy of the Plio-Pleistocene Ross Island flexural moat-fill: a prognosis for ANDRILL Program drilling beneath McMurdo-Ross Ice Shelf

Variations in crustal structure across the transition from West to East Antarctica, Southern Victoria Land

Synchronous oceanic spreading and continental rifting in West Antarctica

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