The Geology of the Queen Alexandra Range, Beardmore Glacier, Ross dependency, Antarctica;; with notes on the correlation of Gondwana sequences

Grindley, G. W.

doi:10.1080/00288306.1963.10422067

Cited by 110 publications

(32 citation statements)

References 24 publications

(13 reference statements)

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“…Progressive peneplanation of the Ross Orogen produced a flat-lying envelope of erosional surfaces (sub-Beacon peneplain), overlain by the Permian-Triassic sandstones and conglomerates of the Beacon Supergroup [Barrett et al, 1972]. The clastic sequences of the Beacon Supergroup are then followed by tholeiitic plutonism and volcanism associated with the emplacement of the Ferrar Dolerite and extrusion of Kirkpatrick Basalt of the Jurassic Ferrar Supergroup [Grindley, 1963].…”

Section: North Victoria Land and Ross Seamentioning

confidence: 99%

Tectonic and denudational history of the Rennick Graben (North Victoria Land): Implications for the evolution of rifting between East and West Antarctica

et al. 2003

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The tectonic depression of the Rennick Graben (northern Victoria Land, Antarctica) is a key element for deciphering the Cenozoic separation history between East and West Antarctica and evolution of the West Antarctic rift system. The geometry, kinematics and timing of the boundary faults of the Rennick Graben are presented, on the basis of a detailed structural study of the major fault segments combined with apatite fission track data. The structural architecture of the Rennick Graben is controlled by distributed and partitioned right‐lateral strike‐slip faulting. Fission track data indicate that the last significant denudation stage of the Rennick Graben shoulders started from Eocene times, with increasing cooling and denudation since 40–50 Ma. A direct structural connection is then established between Cenozoic denudation and the activation of the dextral strike‐slip regime in north Victoria Land during the Cenozoic. In this framework, the Rennick Graben is interpreted as a localized tectonic depression generated as a displacement accommodation area of the regionally sized dextral strike‐slip shearing. The results of this study (1) invalidate the commonly assumed link between Mesozoic Ross Sea rifting and opening of the Rennick Graben; (2) argue against orthogonal rifting models for the Cenozoic evolution of the Ross Sea region; and (3) provide constraints to the modalities and timing of the separation between the East Antarctic craton and the West Antarctica extensional province.

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Section: North Victoria Land and Ross Seamentioning

confidence: 99%

Tectonic and denudational history of the Rennick Graben (North Victoria Land): Implications for the evolution of rifting between East and West Antarctica

et al. 2003

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“…1). A 500 m thick lava sequence is preserved in the Beardmore Glacier region (Grindley 1963), possibly exceeding 1800 m before erosion (McGregor 1965), and rests on massive, Mawsonlike diamictites of the Prebble Formation (Barrett 1969;Barrett & Elliot 1972). The composition of tuffaceous clasts is intermediate to silicic, and comparable to that of the underlying Falla Formation.…”

Section: Comparison With Other Areasmentioning

confidence: 99%

Additional field interpretation of the Jurassic sequence at Carapace Nunatak and Coombs Hills, south Victoria Land Antarctica

Bradshaw

1987

New Zealand Journal of Geology and Geophysics

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The Jurassic volcanic sequence at Carapace Nunatak and Coombs Hills south Victoria Land, records an initial phase ~f explosive volcanicity, in part acidic, that was followed by quieter, flood basalt extrusion, a pattern repeated elsewhere in the Transantarctic Mountains. The explosive phase produced poorly sorted volcanogenic material (Mawson Formation) at Coombs Hills, and this was probably contemporaneous with the deposition of coarse lake sediments (Carapace Sandstone Formation) at Carapace Nunatak. The succeeding flood basalts are known as the Kirkpatrick Basalt Group.Features of the Mawson Formation diamictites do not support the laharic origin proposed by earlier workers. The development of breccia mounds ad)acent to phreatic vents, with avalanching of mIXed Beacon Sandstone and volcanic ejecta seems more likely, with lahars developing distally' Some finer, laminated diamictites may be airfall or gravity-flow deposits. The explosive eruptions carried megablocks of basement granite and Beacon Sandstone upwards for as much as 950 m.At carapace Nunatak a hyaloclastic breccia mass developed after eruption of lava directly into lakewater. Basalt "pilloWS" intrude from a sheet lava base into both breccia and disturbed beds of finegrained fossiliferous lake sediment. A comparable sequence does not occur at Coombs Hills where thick basalt flows overlie Mawson Formation, although rafts of fine sediment in the base of the ~ourth ~ow suggest lake formation during pauses In eruptlon.Thin pillow lavas and sedimentary interbeds in the predominantly subaerial Kirkpatrick Basalt sequence .indicate that subsidence kept pace with lava accumulation to maintain a persistent regional depression. This is also indicated by other Jurassic sequences in the Transantarctic Mountains.

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“…The term Ferrar is used both formally, in the group sense of Grindley (1963), and informally in reference to the Jurassic tholeiitic igneous province in Antarctica. relationship suggests that dike emplacement may be related to the Dufek intrusion, a body also known to intrude Dover Sandstone and Gale Mudstone.…”

Section: Dikes Of Cordiner Peaksmentioning

confidence: 99%

“…Jurassic tholeiitic dolerite sills and flood basalts of the Ferrar Group of Grindley (1963) and its correlatives are exposed discontinuously over a distance of 4000 km or more across Antarctica from eastern Wilkes Land to western Queen Maud Land (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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K—Ar age, composition, and origin of Mesozoic mafic rocks related to Ferrar Group, Pensacola Mountains, Antarctica

Ford

Kistler

1980

New Zealand Journal of Geology and Geophysics

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A variety of mafic igneous bodies, including the unusually large, differentiated, layered gabbroic Dufek intrusion, and basalt and dolerite dikes and sills, intrude a Permian and older sequence in the Pensacola Mountains, near Weddell Sea, Antarctica. K-Ar age determinations show that the sills (179 ± 5 m.y.), the Dufek intrusion (172 ± 4 m.y.), and probably the dikes (minimum age 169 ± 4 m.y.) were emplaced over a narrow time interval in

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The Geology of the Queen Alexandra Range, Beardmore Glacier, Ross dependency, Antarctica;; with notes on the correlation of Gondwana sequences

Cited by 110 publications

References 24 publications

Tectonic and denudational history of the Rennick Graben (North Victoria Land): Implications for the evolution of rifting between East and West Antarctica

Tectonic and denudational history of the Rennick Graben (North Victoria Land): Implications for the evolution of rifting between East and West Antarctica

Additional field interpretation of the Jurassic sequence at Carapace Nunatak and Coombs Hills, south Victoria Land Antarctica

K—Ar age, composition, and origin of Mesozoic mafic rocks related to Ferrar Group, Pensacola Mountains, Antarctica

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