Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica)
Northern Victoria Land is located at the boundary between an extended, presumably hot, region (West Antarctic Rift System) and the thick, possibly cold, East Antarctic craton. The style and timing of Tertiary deformation along with relationships with the magmatic activity are still unclear, and cont...
| Published in: | Tectonics |
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| Other Authors: | , , , , , , , |
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| Language: | English |
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American Geophysical Union
2008
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| Online Access: | http://hdl.handle.net/2122/4257 https://doi.org/10.1029/2007TC002197 |
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ftingv:oai:www.earth-prints.org:2122/4257 |
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Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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ftingv |
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English |
| topic |
Antarctica Admiralty Mountains Extensional Tectonics Mantle Upwelling Seismic Tomography 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics |
| spellingShingle |
Antarctica Admiralty Mountains Extensional Tectonics Mantle Upwelling Seismic Tomography 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics Faccenna, C. Rossetti, F. Becker, T. W. Danesi, S. Morelli, A. Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) |
| topic_facet |
Antarctica Admiralty Mountains Extensional Tectonics Mantle Upwelling Seismic Tomography 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics |
| description |
Northern Victoria Land is located at the boundary between an extended, presumably hot, region (West Antarctic Rift System) and the thick, possibly cold, East Antarctic craton. The style and timing of Tertiary deformation along with relationships with the magmatic activity are still unclear, and contrasting models have been proposed. We performed structural and morphotectonic analyses at the NE termination of northern Victoria Land in the Admiralty Mountains area, where the relationship between topography, tectonics, and magmatism is expected to be well pronounced. We found evidence of two subsequent episodes of faulting, occurring concurrently with the Neogene McMurdo volcanism. The first episode is associated with dextral transtension, and it is overprinted by extensional tectonics during the emplacement of large shield alkaline volcanoes. Upper mantle seismic tomography shows that the extensional regime is limited to regions overlying a low-velocity anomaly. We interpret this anomaly to be of thermal origin, and have tested the role of largescale upwelling on lithosphere deformation in the area. The results of this integrated analysis suggest that the morphotectonic setting of the region and the magmatism is likely the result of upwelling flow at the boundary between the cold cratonic and the hot stretched province (WARS), at work until recent time in this portion of the northern Victoria Land. Published TC4015 3.3. Geodinamica e struttura dell'interno della Terra JCR Journal partially_open |
| author2 |
Faccenna, C.; Università Roma Tre Rossetti, F.; Università Roma Tre Becker, T. W.; University of Southern California, USA Danesi, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia Morelli, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia Università Roma Tre University of Southern California, USA Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia |
| format |
Article in Journal/Newspaper |
| author |
Faccenna, C. Rossetti, F. Becker, T. W. Danesi, S. Morelli, A. |
| author_facet |
Faccenna, C. Rossetti, F. Becker, T. W. Danesi, S. Morelli, A. |
| author_sort |
Faccenna, C. |
| title |
Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) |
| title_short |
Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) |
| title_full |
Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) |
| title_fullStr |
Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) |
| title_full_unstemmed |
Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) |
| title_sort |
recent extension driven by mantle upwelling beneath the admiralty mountains (east antarctica) |
| publisher |
American Geophysical Union |
| publishDate |
2008 |
| url |
http://hdl.handle.net/2122/4257 https://doi.org/10.1029/2007TC002197 |
| long_lat |
ENVELOPE(168.762,168.762,-71.788,-71.788) |
| geographic |
Admiralty Mountains Antarctic East Antarctica Victoria Land |
| geographic_facet |
Admiralty Mountains Antarctic East Antarctica Victoria Land |
| genre |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
| genre_facet |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
| op_relation |
Tectonics /27 (2008) Artemieva M. I. (2007), Dynamic topography of the East European craton: Shedding light upon lithospheric structure, composition and mantle dynamics, Global and Planetary Change 58 (2007) 411 – 434. Balestrieri, M.L., G. Bigazzi, C. Ghezzo and B. Lombardo, (1994), Fission track dating of apatites from the Granite Harbour Intrusive Suite and uplift-denudation history of the Transantarctic Mountains in the area between the Mariner and David Glaciers (northern Victoria Land, Antarctica), Terra Antarctica, 1, 82-87. Bannister S., J. Yu, B. Leitner and B.L.N. Kennett (2003), Variations in the crustal structure across the transition from West to East Antarctica, Southern Victoria Land, Geophys. J. Int., 155(3), 870-880. Bannister S., R.K. Sneider and M.L. Passier (2000), Shear-wave velocities under the Transantarctic Mountains and Terror Rift from surface wave inversion, Geophys. Res. Lett., 27,281-284. Armienti P. and C. Baroni (1999), Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution, Geology, v. 27, p. 617–620, doi:10.1130/0091-7613(1999)0272.3.CO;2. Baroni C., V. Noti, S. Ciccacci, G. Righini, M.C. Salvatore (2004) Fluvial origin of the valley system in northern Victoria Land (Antarctica) from quantitative geomorphic analysis, Geol. Soc. Am. Bull., v. 117; no. 1/2; p. 212–228; doi:10.1130/B25529.1. Becker, T. W. and O'Connell, R. J.: Predicting plate velocities with mantle circulation models, Geochem., Geophys., Geosys., 2, 2001GC000171, 2001. Becker, T., and L. Boschi (2002), A comparison of tomographic and geodynamic mantle models, Geochem. Geophys. Geosyst., 3(1), 1003, doi:10.1029/2001GC000168. Behrendt, J.C., W.E. LeMasurier, A.K. Cooper, F. Tessensohn, A. Trehu, D. Damaske, (1991) The West Antarctic Rift System: a review of geophysical investigations. In: Contributions to Antarctic Research II. Am. Geophys. Union, Antarct. Res. Ser. 53, 67–112. Behrendt, J.C. (1999) Crustal and lithospheric structure of the West Antarctic Rift System from geophysical investigations—a review, Glob. Planet. Change, 23, 25–44. Busetti M., G. Spadini, F. van der Wateren, S. Cloetingh, C. Zanolla (1999) Kinematic modelling of the West Antarctic Rift System, Ross Sea, Antarctica, Global and Planetary Change, 23 1999.79–103. Cande, S.C. and J.M. Stock (2004) Pacific–Antarctic–Australia motion and the formation of the Maquarie Plate. Geophys. J. Int., 157, 399–414. Cande, S.C., J.M. Stock, R.D. Muller and T. Ishihara, (2000) Cenozoic motion between East and West Antarctica, Nature, 404, 145–150. Cooper, A.K., H. Trey, G. Cochrane, F. Egloff, M. Busetti and Acrup Working Group (1997), Crustal structure of the Southern Central Trough, Western Ross Sea. In: Ricci, C.A. Ed., The Antarctic Region: Geological Evolution and Processes. Proceedings of the VIIth International Symposium on Antarctic Earth Sciences, Siena 1995. Terra Antarctica Publications, pp. 637–642. Courtillot, V., A. Davaille, J. Besse, and J. Stock (2003) Three distinct types of hotspots in the Earth’s mantle, Earth and Planetary Science Letters, 205, p. 295–308. Danesi S. and A. Morelli (2001), Structure of the upper mantle under the Antarctic Plate from surface wave tomography, Geophys. Res. Lett., 28, 4395-4398. Danesi S. and A. Morelli (2004), Seismological imaging of the Antarctic continental lithosphere: a review, Gl. Planet. Ch., 42, 155-165. Davey, F. J., and L. De Santis (2005), A multi-phase rifting Model for the Victoria Land basin, Western Ross Sea, in Antarctica: Contributions to Global Earth Sciences, edited by D. K. Futterer et al., chap. 6.3, pp. 301–306, Springer, New York. Davey, F. J., and G. Brancolini (1995), The Late Mesozoic and Cenozoic structural setting of the Ross Sea region, in Geology and Seismic Stratigraphy of the Antarctic Margin, Antarct. Res. Ser., vol. 68, edited by A. K. Cooper, P. F. Barker, and G. Brancolini, pp. 167 – 182, AGU, Washington, D. C. Davey, F.J., , S.C. Cande, J.M. Stock, (2006) Extension in thewestern Ross Sea region—links between Adare Basin and Victoria Land Basin, Geophys. Res. Lett., 33, L20315, doi:10.1029/2006GL027383. Finn, C. A., R. D. Muller, and K. S. Panter (2005), A Cenozoic diffuse alkaline magmatic province (DAMP) in the southwest Pacific without rift or plume origin, Geochem. Geophys. Geosyst., 6, Q02005, doi:10.1029/2004GC000723 Fitzgerald, P.G. (1992), The Transantarctic Mountains of Southern Victoria Land: the application of apatite fission track analysis to a rift shoulder, Tectonics, 11, 634–662. Fitzgerald, P.G., A.J.W. Gleadow (1988) Fission-track geochronology, tectonics and structure of the Transantarctic Mountains in northern Victoria Land, Antarctica, Chem. Geol., 73, 169–198. GANOVEX Team (1987), Geological map of NorthVictoria Land, Antarctica, 1:500000 explanation notes. Geol. Jahrb., B66, 7-79. Hager B. H. and R. J. O'Connell, A simple global model of plate dynamics and mantle convection, J. Geophys. Res. 86, 4843-4867, 1981. Hamilton, R., C.C. Sorlien, P. Luyendyk, , L.R. Bartek (2001) Cenozoic tectonics of the Cape Roberts rift basin and Transantarctic Mountains front, southwestern Ross Sea, Antarctica, Tectonics, 20, 325–342. Jordan, H. (1981), Tectonic observations in the Hallet Volcanic Province, Antarctica. Geol. Jb., B 41, 111 - 125. King, S.D. (2007) Hotspot and edge-driven convection, Geology, 35, 223-226, doi:10.1130/G23291A.1 Läufer A., G. Kleindshmidt, F. Hejnes-Kunst, F. Rossetti, C. Faccenna (2006) Geological Map of the Cape Adare Quadrangle, north Victoria Land, Antarctica (Scale 1:250.000), BGR, Hannover, Germany. Lawrence J.F., D.A. Wiens, A.A. Nyblade, S. Anandakrishnan, P.J. Shore and D. Voigt (2006), Crust and upper mantle structure of the Transantarctic Mountains and surrounding regions from receiver functions, surface waves and gravity: Implication and uplift models, Geoch. Geophys. Geosys., 7, 10, Q10011, doi:10.1029/2006GC001282. Lawver L.A. and L.M. Gahagan (1994) Constraints on timing of extension in the Ross Sea region, Terra Antarctica, 1, 545-552. LeMasurier, W. E. (1990), Late Cenozoic volcanism on the Antarctic Plate: An overview, in Volcanoes of the Antarctic Plate and Southern Oceans, Antarct. Res. Ser., vol. 48, edited by W. E. LeMasurier and J. W. Thomson, pp. 1–18,AGU, Washington, D. C. 490 Lisker F., A. L., A.L .Läufer, W M. Olesch, F. Rossetti and T. Schäfer (2006), Transantarctic Basin: new insights from fission trackand structural data from the USARPMountains and adjacent areas (Northern Victoria Land, Antarctica), Basin Research, 18, 497-520. Lisker, F. (2002) Review of fission track studies in northern Victoria Land — passive margin evolution versus uplift of the Transantarctic Mountains, Tectonophysics, 349, 57–73. Lithgow-Bertelloni C. and J. H. Guynn (2004) Origin of the lithospheric stress field, Journal of Geophysical Research, vol. 109, B01408, 10.1029/2003JB002467. Mukasa, S. B. and I.W.D. Dalziel (2000), Marie Byrd Land, West Antarctica: Evolution of Gondwana’s Pacific margin constrained by zircon U-Pb geochronology and feldspar common Pb isotopic composition, Geological Society of America Bullettin, 112, 611-627. Müller, R. D., S. C. Cande, J. M. Stock, and W. R. Keller (2005), Crustal structure and rift flank uplift of the Adare Trough, Antarctica, Geochem. Geophys. Geosyst., 6, Q11010, doi:10.1029/2005GC001027. Redfield T.F. (1994), The Transantarctic Mountains and the breakup of Gondwana: uplift, underplating, and flexural suppression. Unpublished Ph.D. thesis, Arizona State University. Ritzwoller M.H., N.M. Shapiro, A.L. Levshin and G.M. Leahy (2001), Crustal and upper mantle structure beneath Antarctica and surrounding oceans, J. Geophys. Res., 106, 30645-30670. Rocchi, S., P. Armienti, M. D’Orazio, S. Tonarini, J.R. Wijbrans, and G. Di Vincenzo (2002), Cenozoic magmatism in the western Ross Embayment. Role of mantle plume vs. plate dynamics in the development of the West Antarctic Rift System, Journal of Geophysical Research, 107(2195), doi:10.129/2001JB000515. Rocchi, S., F. Storti, G. Di Vincenzo, and F. Rossetti (2003), Intraplate strike-slip tectonics as an alternative to mantle plume activity for the Cenozoic rift magmatism in the Ross Sea region, Antarctica, in Intraplate Strike-Slip Deformation Belts, edited by F. Storti, R. E. Holdsworth, and F. Salvini, Geol. Soc. Spec. Publ., 210, 145–158. Rocholl, A., M. Stein, M. Molzahn, S. R. Hart, and G. Wo¨rner (1995), Geochemical evolution of rift magmas by progressive tapping of a stratified mantle source beneath the Ross Sea Rift, northern Victoria Land, Antarctica, Earth Planet. Sci. Lett., 131(3–4), 207–224. Rossetti, F., F. Lisker, F. Storti, A. Läufer (2003) Tectonic and denudational history of the Rennick Graben (North Victoria Land): implications for the evolution of rifting between East andWest Antarctica, Tectonics, 22, 1016, doi:10.1029/2002TC001416. Rossetti, F., F. Storti, M. Busetti, F. Lisker, G. Di Vincenzo, A. Läufer, S. Rocchi, F. Salvini (2006) Eocene initiation of Ross Sea dextral faulting and implications for East Antarctic neotectonics, J. Geol. Soc. (Lond.), 163, 119–126. Salvini, F., G. Brancolini, M. Busetti, F. Storti, F. Mazzarini, and F. Coren (1997) Cenozoic geodynamics of the Ross Sea Region, Antarctica. Crustal extension, intraplate strike-slip faulting and tectonic inheritance, Journal of Geophysical Research, 102, 24669–24696. Sieminski A., E. Debayle and J.J. Lévêque (2003), Seismic evidence for deep low-velocity anomalies in the transition zone beneath West Antarctica, Earth Planet. Sc. Lett., 216, 4, 645-661. Stackebrandt W., (2003), Tectonic and isostatic controls on landscape evolution in Northern Victoria Land, Antarctica. Geol. Jahrb., B95, 209, 129-152. Steinberger, B. and A. Calderwood (2006). Models of large-scale viscous flow in the Earth's mantle with constraints from mineral physics and surface observations, Geophys. J. Int., 167, 1461-1481. doi:10.1111/j.1365-246X.2006.03131.x http://hdl.handle.net/2122/4257 doi:10.1029/2007TC002197 |
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ftingv:oai:www.earth-prints.org:2122/4257 2023-05-15T13:51:40+02:00 Recent extension driven by mantle upwelling beneath the Admiralty Mountains (East Antarctica) Faccenna, C. Rossetti, F. Becker, T. W. Danesi, S. Morelli, A. Faccenna, C.; Università Roma Tre Rossetti, F.; Università Roma Tre Becker, T. W.; University of Southern California, USA Danesi, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia Morelli, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia Università Roma Tre University of Southern California, USA Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia 2008-08 http://hdl.handle.net/2122/4257 https://doi.org/10.1029/2007TC002197 en eng American Geophysical Union Tectonics /27 (2008) Artemieva M. I. (2007), Dynamic topography of the East European craton: Shedding light upon lithospheric structure, composition and mantle dynamics, Global and Planetary Change 58 (2007) 411 – 434. Balestrieri, M.L., G. Bigazzi, C. Ghezzo and B. Lombardo, (1994), Fission track dating of apatites from the Granite Harbour Intrusive Suite and uplift-denudation history of the Transantarctic Mountains in the area between the Mariner and David Glaciers (northern Victoria Land, Antarctica), Terra Antarctica, 1, 82-87. Bannister S., J. Yu, B. Leitner and B.L.N. Kennett (2003), Variations in the crustal structure across the transition from West to East Antarctica, Southern Victoria Land, Geophys. J. Int., 155(3), 870-880. Bannister S., R.K. Sneider and M.L. Passier (2000), Shear-wave velocities under the Transantarctic Mountains and Terror Rift from surface wave inversion, Geophys. Res. Lett., 27,281-284. Armienti P. and C. Baroni (1999), Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution, Geology, v. 27, p. 617–620, doi:10.1130/0091-7613(1999)0272.3.CO;2. Baroni C., V. Noti, S. Ciccacci, G. Righini, M.C. Salvatore (2004) Fluvial origin of the valley system in northern Victoria Land (Antarctica) from quantitative geomorphic analysis, Geol. Soc. Am. Bull., v. 117; no. 1/2; p. 212–228; doi:10.1130/B25529.1. Becker, T. W. and O'Connell, R. J.: Predicting plate velocities with mantle circulation models, Geochem., Geophys., Geosys., 2, 2001GC000171, 2001. Becker, T., and L. Boschi (2002), A comparison of tomographic and geodynamic mantle models, Geochem. Geophys. Geosyst., 3(1), 1003, doi:10.1029/2001GC000168. Behrendt, J.C., W.E. LeMasurier, A.K. Cooper, F. Tessensohn, A. Trehu, D. Damaske, (1991) The West Antarctic Rift System: a review of geophysical investigations. In: Contributions to Antarctic Research II. Am. Geophys. Union, Antarct. Res. Ser. 53, 67–112. Behrendt, J.C. (1999) Crustal and lithospheric structure of the West Antarctic Rift System from geophysical investigations—a review, Glob. Planet. Change, 23, 25–44. Busetti M., G. Spadini, F. van der Wateren, S. Cloetingh, C. Zanolla (1999) Kinematic modelling of the West Antarctic Rift System, Ross Sea, Antarctica, Global and Planetary Change, 23 1999.79–103. Cande, S.C. and J.M. Stock (2004) Pacific–Antarctic–Australia motion and the formation of the Maquarie Plate. Geophys. J. Int., 157, 399–414. Cande, S.C., J.M. Stock, R.D. Muller and T. Ishihara, (2000) Cenozoic motion between East and West Antarctica, Nature, 404, 145–150. Cooper, A.K., H. Trey, G. Cochrane, F. Egloff, M. Busetti and Acrup Working Group (1997), Crustal structure of the Southern Central Trough, Western Ross Sea. In: Ricci, C.A. Ed., The Antarctic Region: Geological Evolution and Processes. Proceedings of the VIIth International Symposium on Antarctic Earth Sciences, Siena 1995. Terra Antarctica Publications, pp. 637–642. Courtillot, V., A. Davaille, J. Besse, and J. Stock (2003) Three distinct types of hotspots in the Earth’s mantle, Earth and Planetary Science Letters, 205, p. 295–308. Danesi S. and A. Morelli (2001), Structure of the upper mantle under the Antarctic Plate from surface wave tomography, Geophys. Res. Lett., 28, 4395-4398. Danesi S. and A. Morelli (2004), Seismological imaging of the Antarctic continental lithosphere: a review, Gl. Planet. Ch., 42, 155-165. Davey, F. J., and L. De Santis (2005), A multi-phase rifting Model for the Victoria Land basin, Western Ross Sea, in Antarctica: Contributions to Global Earth Sciences, edited by D. K. Futterer et al., chap. 6.3, pp. 301–306, Springer, New York. Davey, F. J., and G. Brancolini (1995), The Late Mesozoic and Cenozoic structural setting of the Ross Sea region, in Geology and Seismic Stratigraphy of the Antarctic Margin, Antarct. Res. Ser., vol. 68, edited by A. K. Cooper, P. F. Barker, and G. Brancolini, pp. 167 – 182, AGU, Washington, D. C. Davey, F.J., , S.C. Cande, J.M. Stock, (2006) Extension in thewestern Ross Sea region—links between Adare Basin and Victoria Land Basin, Geophys. Res. Lett., 33, L20315, doi:10.1029/2006GL027383. Finn, C. A., R. D. Muller, and K. S. Panter (2005), A Cenozoic diffuse alkaline magmatic province (DAMP) in the southwest Pacific without rift or plume origin, Geochem. Geophys. Geosyst., 6, Q02005, doi:10.1029/2004GC000723 Fitzgerald, P.G. (1992), The Transantarctic Mountains of Southern Victoria Land: the application of apatite fission track analysis to a rift shoulder, Tectonics, 11, 634–662. Fitzgerald, P.G., A.J.W. Gleadow (1988) Fission-track geochronology, tectonics and structure of the Transantarctic Mountains in northern Victoria Land, Antarctica, Chem. Geol., 73, 169–198. GANOVEX Team (1987), Geological map of NorthVictoria Land, Antarctica, 1:500000 explanation notes. Geol. Jahrb., B66, 7-79. Hager B. H. and R. J. O'Connell, A simple global model of plate dynamics and mantle convection, J. Geophys. Res. 86, 4843-4867, 1981. Hamilton, R., C.C. Sorlien, P. Luyendyk, , L.R. Bartek (2001) Cenozoic tectonics of the Cape Roberts rift basin and Transantarctic Mountains front, southwestern Ross Sea, Antarctica, Tectonics, 20, 325–342. Jordan, H. (1981), Tectonic observations in the Hallet Volcanic Province, Antarctica. Geol. Jb., B 41, 111 - 125. King, S.D. (2007) Hotspot and edge-driven convection, Geology, 35, 223-226, doi:10.1130/G23291A.1 Läufer A., G. Kleindshmidt, F. Hejnes-Kunst, F. Rossetti, C. Faccenna (2006) Geological Map of the Cape Adare Quadrangle, north Victoria Land, Antarctica (Scale 1:250.000), BGR, Hannover, Germany. Lawrence J.F., D.A. Wiens, A.A. Nyblade, S. Anandakrishnan, P.J. Shore and D. Voigt (2006), Crust and upper mantle structure of the Transantarctic Mountains and surrounding regions from receiver functions, surface waves and gravity: Implication and uplift models, Geoch. Geophys. Geosys., 7, 10, Q10011, doi:10.1029/2006GC001282. Lawver L.A. and L.M. Gahagan (1994) Constraints on timing of extension in the Ross Sea region, Terra Antarctica, 1, 545-552. LeMasurier, W. E. (1990), Late Cenozoic volcanism on the Antarctic Plate: An overview, in Volcanoes of the Antarctic Plate and Southern Oceans, Antarct. Res. Ser., vol. 48, edited by W. E. LeMasurier and J. W. Thomson, pp. 1–18,AGU, Washington, D. C. 490 Lisker F., A. L., A.L .Läufer, W M. Olesch, F. Rossetti and T. Schäfer (2006), Transantarctic Basin: new insights from fission trackand structural data from the USARPMountains and adjacent areas (Northern Victoria Land, Antarctica), Basin Research, 18, 497-520. Lisker, F. (2002) Review of fission track studies in northern Victoria Land — passive margin evolution versus uplift of the Transantarctic Mountains, Tectonophysics, 349, 57–73. Lithgow-Bertelloni C. and J. H. Guynn (2004) Origin of the lithospheric stress field, Journal of Geophysical Research, vol. 109, B01408, 10.1029/2003JB002467. Mukasa, S. B. and I.W.D. Dalziel (2000), Marie Byrd Land, West Antarctica: Evolution of Gondwana’s Pacific margin constrained by zircon U-Pb geochronology and feldspar common Pb isotopic composition, Geological Society of America Bullettin, 112, 611-627. Müller, R. D., S. C. Cande, J. M. Stock, and W. R. Keller (2005), Crustal structure and rift flank uplift of the Adare Trough, Antarctica, Geochem. Geophys. Geosyst., 6, Q11010, doi:10.1029/2005GC001027. Redfield T.F. (1994), The Transantarctic Mountains and the breakup of Gondwana: uplift, underplating, and flexural suppression. Unpublished Ph.D. thesis, Arizona State University. Ritzwoller M.H., N.M. Shapiro, A.L. Levshin and G.M. Leahy (2001), Crustal and upper mantle structure beneath Antarctica and surrounding oceans, J. Geophys. Res., 106, 30645-30670. Rocchi, S., P. Armienti, M. D’Orazio, S. Tonarini, J.R. Wijbrans, and G. Di Vincenzo (2002), Cenozoic magmatism in the western Ross Embayment. Role of mantle plume vs. plate dynamics in the development of the West Antarctic Rift System, Journal of Geophysical Research, 107(2195), doi:10.129/2001JB000515. Rocchi, S., F. Storti, G. Di Vincenzo, and F. Rossetti (2003), Intraplate strike-slip tectonics as an alternative to mantle plume activity for the Cenozoic rift magmatism in the Ross Sea region, Antarctica, in Intraplate Strike-Slip Deformation Belts, edited by F. Storti, R. E. Holdsworth, and F. Salvini, Geol. Soc. Spec. Publ., 210, 145–158. Rocholl, A., M. Stein, M. Molzahn, S. R. Hart, and G. Wo¨rner (1995), Geochemical evolution of rift magmas by progressive tapping of a stratified mantle source beneath the Ross Sea Rift, northern Victoria Land, Antarctica, Earth Planet. Sci. Lett., 131(3–4), 207–224. Rossetti, F., F. Lisker, F. Storti, A. Läufer (2003) Tectonic and denudational history of the Rennick Graben (North Victoria Land): implications for the evolution of rifting between East andWest Antarctica, Tectonics, 22, 1016, doi:10.1029/2002TC001416. Rossetti, F., F. Storti, M. Busetti, F. Lisker, G. Di Vincenzo, A. Läufer, S. Rocchi, F. Salvini (2006) Eocene initiation of Ross Sea dextral faulting and implications for East Antarctic neotectonics, J. Geol. Soc. (Lond.), 163, 119–126. Salvini, F., G. Brancolini, M. Busetti, F. Storti, F. Mazzarini, and F. Coren (1997) Cenozoic geodynamics of the Ross Sea Region, Antarctica. Crustal extension, intraplate strike-slip faulting and tectonic inheritance, Journal of Geophysical Research, 102, 24669–24696. Sieminski A., E. Debayle and J.J. Lévêque (2003), Seismic evidence for deep low-velocity anomalies in the transition zone beneath West Antarctica, Earth Planet. Sc. Lett., 216, 4, 645-661. Stackebrandt W., (2003), Tectonic and isostatic controls on landscape evolution in Northern Victoria Land, Antarctica. Geol. Jahrb., B95, 209, 129-152. Steinberger, B. and A. Calderwood (2006). Models of large-scale viscous flow in the Earth's mantle with constraints from mineral physics and surface observations, Geophys. J. Int., 167, 1461-1481. doi:10.1111/j.1365-246X.2006.03131.x http://hdl.handle.net/2122/4257 doi:10.1029/2007TC002197 restricted Antarctica Admiralty Mountains Extensional Tectonics Mantle Upwelling Seismic Tomography 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics article 2008 ftingv https://doi.org/10.1029/2007TC002197 https://doi.org/10.1130/0091-7613(1999)0272.3.CO;2 2022-07-29T06:05:01Z Northern Victoria Land is located at the boundary between an extended, presumably hot, region (West Antarctic Rift System) and the thick, possibly cold, East Antarctic craton. The style and timing of Tertiary deformation along with relationships with the magmatic activity are still unclear, and contrasting models have been proposed. We performed structural and morphotectonic analyses at the NE termination of northern Victoria Land in the Admiralty Mountains area, where the relationship between topography, tectonics, and magmatism is expected to be well pronounced. We found evidence of two subsequent episodes of faulting, occurring concurrently with the Neogene McMurdo volcanism. The first episode is associated with dextral transtension, and it is overprinted by extensional tectonics during the emplacement of large shield alkaline volcanoes. Upper mantle seismic tomography shows that the extensional regime is limited to regions overlying a low-velocity anomaly. We interpret this anomaly to be of thermal origin, and have tested the role of largescale upwelling on lithosphere deformation in the area. The results of this integrated analysis suggest that the morphotectonic setting of the region and the magmatism is likely the result of upwelling flow at the boundary between the cold cratonic and the hot stretched province (WARS), at work until recent time in this portion of the northern Victoria Land. Published TC4015 3.3. Geodinamica e struttura dell'interno della Terra JCR Journal partially_open Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Victoria Land Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Admiralty Mountains ENVELOPE(168.762,168.762,-71.788,-71.788) Antarctic East Antarctica Victoria Land Tectonics 27 4 n/a n/a |