Magmatic and tectonic patterns over the Northern Victoria Land sector of the Transantarctic Mountains from new aeromagnetic imaging

Ferraccioli, Fausto; Armadillo, Egidio; Zunino, Andrea; Bozzo, E.; Rocchi, Sergio; Armienti, Pietro

doi:10.1016/j.tecto.2008.11.028

Cited by 38 publications

(64 citation statements)

References 63 publications

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“…This set of faults could have been linked with the deformation accommodated within the Adare Basin, transferring the motion southward, possibly into the Terror Rift. This structural setting hosted the younger volcanic activity (discussed further in section 5.3 [see also Ferraccioli et al, 2009]). The lack of a southward continuation of faulting within the Adare Basin ( Figure 11) implies that no deformation was accommodated within the center part of the Northern Basin during the Neogene, as supported by the study of Brancolini et al [1995].…”

Section: Geochemistry Geophysicsmentioning

confidence: 94%

Postspreading rifting in the Adare Basin, Antarctica: Regional tectonic consequences

Granot¹,

Cande

Stock

et al. 2010

Geochem Geophys Geosyst

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[1] Extension during the middle Cenozoic in the north end of the West Antarctic rift system (WARS) is well constrained by seafloor magnetic anomalies formed at the extinct Adare spreading axis. Kinematic solutions for this time interval suggest a southward decrease in relative motion between East and West Antarctica. Here we present multichannel seismic reflection and seafloor mapping data acquired within and near the Adare Basin on a recent geophysical cruise. We have traced the ANTOSTRAT seismic stratigraphic framework from the northwest Ross Sea into the Adare Basin, verified and tied to DSDP drill sites 273 and 274. Our results reveal three distinct periods of tectonic activity. An early localized deformational event took place close to the cessation of seafloor spreading in the Adare Basin (∼24 Ma). It reactivated a few normal faults and initiated the formation of the Adare Trough. A prominent pulse of rifting in the early Miocene (∼17 Ma) resulted in normal faulting that initiated tilted blocks. The overall trend of structures was NE-SW, linking the event with the activity outside the basin. It resulted in major uplift of the Adare Trough and marks the last extensional phase of the Adare Basin. Recent volcanic vents (Pliocene to present day) tend to align with the early Miocene structures and the on-land Hallett volcanic province. This latest phase of tectonic activity also involves near-vertical normal faulting (still active in places) with negligible horizontal consequences. The early Miocene extensional event found within the Adare Basin does not require a change in the relative motion between East and West Antarctica. However, the lack of subsequent rifting within the Adare Basin coupled with the formation of the Terror Rift and an on-land and subice extension within the WARS require a pronounced change in the kinematics of the rift. These observations indicate that extension increased southward, therefore suggesting that a major change in relative plate motion took place in the middle Miocene. The late Miocene pole of rotation might have been located north of the Adare Basin, with opposite opening sign compared to the Eocene-Oligocene pole.

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Section: Geochemistry Geophysicsmentioning

confidence: 94%

Postspreading rifting in the Adare Basin, Antarctica: Regional tectonic consequences

Granot¹,

Cande

Stock

et al. 2010

Geochem Geophys Geosyst

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“…Recent works (Bracciali et al, 2009;Federico et al, 2006;Ferraccioli et al, 2002Ferraccioli et al, , 2009Gemelli et al, 2009;Rocchi et al, 2003;Roland et al, 2004;Tessensohn and Henjes-Kunst, 2005) led to an updated model of the Ross Orogeny in Victoria Land (Rocchi et al, 2011). In this new Cambrian scenario, the convergent paleo-Pacific margin of Gondwana consisted of a main continuous subduction zone coupled with local, transient subduction zones related to a more or less continuous ribbon of outboard pieces of stretched forearc regions.…”

Section: Geological Settingmentioning

confidence: 99%

Time–space focused intrusion of genetically unrelated arc magmas in the early Paleozoic Ross–Delamerian Orogen (Morozumi Range, Antarctica)

Rocchi

Vincenzo

Dini

et al. 2015

Lithos

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“…Several works show a correspondence between the fault spatial distribution and the localisation and growth of volcanic edifices of the McMurdo Volcanic Group (Behrendt et al, 1996;Dubbini et al, 2010;Faccenna et al, 2008;Ferraccioli et al, 2009;Rocchi et al, 2003;Salvini and Storti, 1999;Salvini et al, 1997). Within this framework, Mt.…”

Section: Geological Outlinementioning

confidence: 89%

“…A dominant Cenozoic dextral strike-slip kinematics, evolving to transtensional in the Ross Sea, has been documented by field data (Capponi et al, 1999;Rossetti et al, 2002Rossetti et al, , 2003Rossetti et al, , 2006Storti et al, 2001Storti et al, , 2006Storti et al, , 2008. The regional pattern of strike-slip and extensional fault systems has been well constrained by seismic profile interpretation (Salvini et al, 1997), magnetic anomaly maps (e.g., Ferraccioli et al, 2000Ferraccioli et al, , 2009, and GPS measurements (Dubbini et al, 2010), revealing a complex tectonic framework of crustal-scale NW-SE dextral faults interacting with major N-S-striking extensional faults. This tectonic regime accommodated crustal extension and development of sedimentary basins (e.g., the Adare Trough, the Northern Basin and the Terror Rift) during Cenozoic oblique rifting in the WARS (e.g.…”

Section: Geological Outlinementioning

confidence: 97%

Miocene-to-Quaternary oblique rifting signature in the Western Ross Sea from fault patterns in the McMurdo Volcanic Group, north Victoria Land, Antarctica

Vignaroli

Balsamo²,

Giordano

et al. 2015

Tectonophysics

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Magmatic and tectonic patterns over the Northern Victoria Land sector of the Transantarctic Mountains from new aeromagnetic imaging

Cited by 38 publications

References 63 publications

Postspreading rifting in the Adare Basin, Antarctica: Regional tectonic consequences

Postspreading rifting in the Adare Basin, Antarctica: Regional tectonic consequences

Time–space focused intrusion of genetically unrelated arc magmas in the early Paleozoic Ross–Delamerian Orogen (Morozumi Range, Antarctica)

Miocene-to-Quaternary oblique rifting signature in the Western Ross Sea from fault patterns in the McMurdo Volcanic Group, north Victoria Land, Antarctica

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