Age position, geodynamic specifics and paleomagnetism of intrusive complexes of the western coast of the Antarctic Peninsula

V.G. Bakhmutov; D. P. Gladkochub; V. V. Shpyra

doi:10.24028/gzh.0203-3100.v35i3.2013.116387

Authors

V.G. Bakhmutov Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine
D. P. Gladkochub Institute of the Earth's Crust SB RAS, Russian Federation
V. V. Shpyra Institute of Geophysics of the National Academy of Sciences of Ukraine, Ukraine

DOI:

https://doi.org/10.24028/gzh.0203-3100.v35i3.2013.116387

Abstract

New paleomagnetic and geochronological results on late Cretaceous-Paleogene intrusive and effusive complexes of the western part of the Antarctic Peninsula have been obtained. New isotopic dating "fills" regularly the temporal gap from 96 to 61 Ma demonstrating uninterrupted character of development of considered active margin from the phase of its origination to its collapse. For the most part of analyzed rocks from early associations of the Andian complex (96- 88 Ma) subductively-enriched lithospheric source can be definitely detected. For younger early Cenozoic products (about 60 Ma) a heterogeneous source, which appeared as a result of mixing of subductive and enriched asthenospheric components has been noticed. For uneven-aged groups of rocks the components of primary magnetization with directions being in a good agreement between them have been subdivided. Intrusive rocks along the western coast of the Antarctic Peninsula by both their age valuations and paleomagnetic estimations refer to the Cretaceous su-perchrone of normal polarity, while the rocks forming insular archipelagoes date back to Paleo-cene. New paleomagnetic poles for the late Cretaceous (for 112 and 85 Ma) and Paleocene (60 Ma) have been determined. The results provide evidence for the absence of considerable (within the limits of paleomagnetic method accuracy) displacements of the block of the Antarctic Peninsula from the East Antarctica during the last 100 Ma. It confirms the hypothesis that the opening of the Drake Straight in Oligocene occurred at the expense of the northward drift of the South America as to relatively stabile by its location Antarctic craton. Paleomagnetic results confirm the possibility of significant displacement of the South Shetland islands relative to the block of the Antarctic Peninsula in Paleogene-Eocene.

References

Бахмутов В. Г. Геологический обзор архипелага Аргентинские острова и прилегающей территории Антарктического полуострова // Бюл. Укр. Антаркт. центра. - 1998. - Вып. 2. - С. 77-84.

Бахмутов В. Г., Третях А.Н. Результаты палеомагнитных исследований мезозойско-раннекайнозойских пород Западной Антарктики (район архипелага Аргентинские острова) // Геофиз. журн. - 2002. - 24, № 4. - С. 28-41.

Гладкочуб Д. П., Донская Т. В., Бахмутов В. Г. Особенности состава, возраст и модель образования габброидов Андийского комплекса (мыс Туксен, Западная Антарктика) / / Укр. Антаркт. журн. - 2012. - № 10-11. - С. 39-47.

Грикуров Г.Э. Геология Антарктического полуострова. - Москва: Наука, 1973. - 120 с.

Орлова М.И. Кинематическая эволюция интрузивных образований Аргентинских островов (Антарктический полуостров) // Геофиз. журн.- 2001. - 23, № 1. - С. 108-114.

Орлова М.И. Компонентный состав естественной остаточной намагниченности мезозойских образований Аргентинских островов (Антарктический полуостров) // Геофиз. журн. - 1999.- 21, № 5. - С. 49-56.

Фор Г. Основы изотопной геологии. - Москва: Мир, 1989. - 590 с.

Хаин В.Е. Тектоника океанов и континентов. - Москва: Науч. мир, 2001. - 606 с.

Bakhmutov V., Shpyra V. Palaeomagnetism of Late Cretaceous - Paleocene igneous rocks from western part of Antarctic Peninsula (Argentine Islands archipelago) // Geol. Quarterly. - 2011.- 55 (4). - P. 285-300.

Besse J., Courtillot V. Apparent and true polar wander and the geometry of the geomagnetic field over the last 200 Myr // J. Geophys. Res.- 2002. - 107 (B11). - P. 2300. - DOI:10.1029 /2000JB000050.

Blundell D. J. Palaeomagnetic investigations in the Falkland Islands Dependencies // British Antarct. Surv. Sci. Rep. - 1962. - № 39.- 24 p.

Chadima M., Hrouda F. Remasoft 3.0 - a user-friendly paleomagnetic data browser and analyzer // Travaux Geophys. - 2006. - XXVII.- P. 20-21.

Curtis R. The petrology of the Graham Coast, Graham Land // British Antarct. Surv. Sci. Rep. - 1966. - № 50. - 51 p.

Dalziel I. W. D., Elliot D. H. West Antarctica: problem child of Gondwanaland // Tectonics. - 1982.- № 1. - P. 3-19.

Dalziel I.W.D., Lowrie W, Klingfield R., Opdyke N.D. Paleomagnetic data from the southernmost Andes and the Antarctandes // Implications of Continental Drift to the Earth Sciences. - San Diego: Academ. Press., 1973. - Vol. 1. - P. 87- 101.

Elliot D.H. The petrology of the Argentine Islands //British Antarct. Surv. Sci. Rep. - 1964. - №41.- 31 p.

Ferraccioli F., Jones P.C., Vaughan A.P., Leat P.T. New aerogeophysical view of the Antarctic Peninsula: more pieces, less puzzle//Geophys. Res. Let. - 2006. - 33 (5). - P. L05310. - DOI:10. 1029/2005GL024636.

Fleash R.J., Sutter J.F., Elliot D.H. Interpretation of discordant 39Ar / 40Ar age-spectra of Mesozoic tholeiites of Antarctica // Geochim. Cosmochim. Acta. - 1977. - 41. - P. 15-32.

Fleming E.A., Thomson J. W. British Antarctic Territory geological map, Northern Graham Land and South Shetland Islands. Scale 1 : 500 000 // British Antarct. Surv. - 1979.

Gladkochub D., Bakhmutov V., Vodovozov V., Vaschenko V. New achievements in geological-geophysics investigations at the Academik Vernadsky Station area (Western Antarctica): petrology, geochronology and mineral resources // Scientific investigations in Antarctica: Abstracts of III Intern. Conference. - Киев: Изд. Укр. Антаркт. центра, 2006. - P. 36.

Gradstein F. M., Ogg J. G., Smith A. G. A Geologic Time Scale. - Cambridge; New York; Melbourne: Cambridge Univer. Press., 2004. - 589 p. - DOI:10.1017/S001675680521141X.

Greku R., Milinevsky G., Ladanovsky Y., Bakhmach P., Greku T. Topographic and Geodetic research by GPS, Echosounding and ERS Altimetric, and SAR Interferometric Surveys during Ukrainian Antarctic Expedition in the West Antarctic // Antarctica: Contribution to global earth sciences. - Berlin; Heidelberg; New York: Springer-Verlag, 2006.- P. 383-390.

Grunow A. New paleomagnetic data from Antarctic Peninsula and their tectonic implication // J. Geophys. Res. - 1993. - 98, № B8. - P. 13815- 13833. - DOI:10.1029/93JB01089.

Guenthner W. R., Barbeau D. L., Reiners P. W., Thomson S. N. Slab window migration and terrane accretion preserved by low-temperature thermochronology of a magmatic arc, northern Antarctic Peninsula // Geochem. Geophys. Geosyst. - 2010. - 11 (3). - P. Q03001. - DOI: 10.1029/2009 gc002765.

Hooper P.R. The petrology of Anvers Island and adjacent islands // British Antarct. Surv. Sci. Rep.- 1962. - № 34. - 69 p.

Jin Y.K., Larter R.D., Kim Y., Nam S.H., Kim K.J. Post-subduction margin structures along Boyd Strait, Antarctic Peninsula // Tectonophysics. - 2002.- 346. - P. 187-200.

Kellogg K. Paleomagnetic evidence for oroclinal bending of the southern Antarctic Peninsula // Geol. Soc. Amer. Bul. - 1980. - 91. - P. 414- 420.

Kellogg K., Reynolds R. L. Paleomagnetic results from the Lassiter Coast, Antarctica, and a test for oroclinal bending of the Antarctic Peninsula // J. Geophys. Res. Solid Earth. - 1978. - 83. - P. 2293-2299.

Kirschvink J. L. The least squares line and plane and the analysis of palaeomagnetic data // Geophys. J. Res. Astron. Soc. - 1980. - 62. - P. 699- 718.

Larter R. D., Barker P. F. Effects of ridge cresttrench interaction on Antarctic-Phoenix spreading: forces on a young subducting plate // J. Geophys. Res. - 1991. - 96 (B12). - P. 19583-19607. - DOI:10.1029/91JB02053.

Larter R.D., Rebesco M., Venneste L.E., Gamboa L.A.P., Barker P. F. Cenozoic tectonic, sedimentary and glacial history of the continental shelf west of Graham Land, Antarctic Peninsula // Geology and Seismic Stratigraphy of the Antarctic Margin. - Pt. 2. - Antarct. Res. Ser. - Vol. 71. - Washington: AGU, 1997. - DC. - P. 1-27.

Leat P. T., Scarrow J. H., Millar I. L. On the Antarctic Peninsula batholith // Geol. Mag. - 1995. - 132 (4). - P. 399-412.

Le Maitre R. W., Bateman P., Dudek A., Keller I., Lameyre I., Le Bag M.I., Sabine P.A., Schmid R., Sorensen H., Streckeisen A., Woolley A.R. Zanettin B., Bonin B., Efremova S. A Classification of Igneous Rocks and Glossary of Terms: Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks. 193. - Oxford: Blackwell Scientific Publications, 1989. - 236 p.

Lewandowski M., Werne T., Nowozynski K. PDA - a package of Fortran programs for palaeomagne-tic data analysis. - Inst. Geophys. Pol. Acad. Sci. Manuscript, 1997. - P. 1-17.

Longshaw S.K., Griffiths D.H. A paleomagnetic study of Jurassic rocks from the Antarctic Peninsula and its implications // J. Geol. Soc. - 1983.- 140 (6). - P. 945-954.

Ludwig K. R. SQUID 1.02: A users manual. - Berkeley: Berkeley Geochron. Centre, 2001a. - Spec. Publ. - 2. - 19 p.

Ludwig K.R. User manual for Isoplot / Ex rev. 2.49.- Berkeley, CA: Berkeley Geochron. Centre, 20016.- 55 p.

Nawrocki J., Panczyk M., Williams I. S. Isotopic ages and palaeomagnetism of selected magmatic rocks from King George Island (Antarctic Peninsula) // J. Geol. Soc. - 2010. - 167 (5). - P. 1063- 1079. - DOI:10.1144/0016-76492009-177.

Pankhurst R.J. Rb-Sr constraints on the ages of basement rocks of the Antarctic Peninsula // Antarctic Earth Science. - Australian Academy of science. Canberra and Cambridge: Cambridge Univer. Press., 1983. - P. 367-371.

Pankhurst R.J. Rb-Sr geochronology of Graham Land, Antarctica // J. Geol. Soc. - 1982. - 139 (6). - P. 701-711. - DOI:10.1144/gsjgs.139.6.0701.

Panteeva S.V., Gladkochoub D.P., Donskaya T.V., Markova V.V., Sandimirova G.P. Determination of 24 trace elements in felsic rocks by inductively coupled plasma mass spectrometry after lithium metaborate fusion // Spectrochim. ActaPt. B: Atomic Spectroscopy. - 2003. - 58, № 2.- P. 341-350.

Parés J. M., Dinarés-Turell J. Datos paleomagné-ticos del sustrato rocoso de la isla de Livingston (Peninsula Antartica): implicaciones tectonicas en la evolucion neogena // Acta Geol. Hisp. - 1999. - 34. - P. 339-351.

Poblete F., Arriagada C., Roperch P., Astudillo N., Herve F., Kraus S., Le Roux J.P. Paleomagnetism and tectonics of the South Shetland Islands and the northern Antarctic Peninsula // Earth Planet. Sci. Let. - 2011. - 302 (3-4). - P. 299- 313. - D0I:10.1016/j.epsl.2010.12.019.

Rapalini A.E. A paleomagnetic analysis of the Patagonian Orocline // Geol. Acta. - 2007. - 5 (4).- P. 287-294.

Rex D. C. Geochronology in relation to the stratigraphy of the Antarctic Peninsula // British Antarct. Surv. Bul. - 1976. - 43. - P. 49-58.

Riley T.R., Leat P.T., Pankhurst R.J., Harris C. Origins of large volume rhyolitic volcanism in the Antarctic Peninsulal and Patagonia by crustal melting // J. Petrol. - 2001. - 42 (6). - P. 1043- 1065.

Shcherbakova V. V., Bakhmutov V. G., Shcherbakov V.P., Zhidkov G. V,, V. V. Shpyra V. V. Palaeo-intensity and palaeomagnetic study of Cretaceous and Palaeocene rocks from Western Antarctica // Geophys. J. Int. - 2012. - 189. - P. 204- 228.

Storey B. C., Garrett S. W. Crustal growth of the Antarctic Peninsula by accretion, magmatism and extension // Geol. Mag. - 1985. - 122. - P. 5- 14.

Tangeman J.A., Mukasa S.B., Grunow A.M. Zircon U-Pb geochronology of plutonic rocks from the Antarctic Peninsula: Confirmation of the presence of unexposed Paleozoic crust // Tectonics. - 1996. - 15, № 6. - P. 1309-1324. - DOI:10.1029/ 96tc00840.

Thomson M.R.A., Pankhurst R.J. Age of Post-Gond-wanian calc-alkaline volcanism in the Antarctic Peninsula region // Antarctic Earth Science. - Cambridge: Cambridge Univ. Press., 1983. - P. 328-333.

Torsvik T.H., Gaina C., Refield T.F. Antarctica and global paleogeography: from Rodinia, through Gondwanaland and Pangea, to the birth of the Southern Ocean and the opening of gateways // Antarctica: A Keystone in a Changing World. Proceeding of the 10 th International Symposiumon Antarctic Earth Scinces. - Washington: Nat. Academ. Press., 2008. - DC. - P. 125-140.

Valencio D.A., Mendia J.E., Vilas J.F. Paleomagnetism and K-Ar of Mesozoic and Cenozoic igneous rocks from Antarctica // Earth Planet. Sci. Let. - 1979. - 45. - P. 61-68.

Vaughan A. P. M., Storey B. C. The Eastern Palmer Land shear zone: a new terrane accretion model for the Mesozoic development of the Antarctic Peninsula // J. Geol. Soc. London. - 2000. - 157 (6). - P. 1243-1256.

Vaughan A.P.M., Pankhurst R.J., Fanning C.M. A Mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula: implications for terrane accretion timing and Gondwana palaeolatitudes // J. Geol. Soc. London. - 2002. - 159 (2). - P. 113- 116.

Vaughan A.P.M., Livermore R.A. Episodicity of Mesozoic terrane accretion along the Pacific margin of Gondwana: implications for superplume - plate interactions // Terrane Processes at the Margins Gondwana. - London: Geol. Soc. Spec. Publ., 2005. - 246. - P. 143-178.

Watts D. R., Watts G. C., Bramall A. M. Cretaceous and Early Tertiary paleomagnetic results fromthe Antarctic Peninsula // Tectonic. - 1984. - 3 (3). - P. 333-346. - D0I:10.1029/TC003i003p 00333.

Weaver S.D., Saunders A.D., Tarney J. Mesozoic-Cenozoic volcanism in the South Shetland Islands and the Antarctic Peninsula: geochemical nature and plate tectonic significance//Antarctic Geoscience. - Madison: Univ. Wisconsin Press., 1982.- P. 263-273.

Willan R. C., Kelley S. P. Mafic dike swarms in the South Shetland Islands volcanic arc: unravelling multiepisodic magmatism related to subduction and continental rifting//J. Geophys. Res. - 1999.- 104 (B10). - P. 23051-23068.

Williams I.S. U-Th-Pb geochronology by ion microprobe / Applications of Microanalytical Techniques to Understanding Mineralizing Processes / Rev. Econom. Geol. - 1998. - 7. - P. 1- 35.

Yegorova T., Bakhmutov V., Janik T., Grag M. Join geophysical and petrological models for the lithosphere structure of the Antarctic Peninsula continental margin // Geophys. J. Int. - 2011.- 184. - P. 90-110. - DOI:111/j.1365-246X. 2010.04867.x.