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Ohta, Y.; Tørudbakken, B. O.; Shiraishi, K. (1990)
Publisher: Co-Action Publishing
Journal: Polar Research
Languages: English
Types: Article
Subjects:
As a part of the Norwegian Antarctic Research Expedition 1984/85, geological mapping was performed in Gjelsvikfjella and western Mühlig-Hofmannfjella, Dronning Maud Land. The northern part of Gjelsvikfjella is dominated by the Jutulsessen metasupracrustals which have been intruded by a major gabbroic body and several generations of dykes. To the south the metasupracrustals gradually transform into the Risemedet migmatites. In western Mühlig-Hofmannfjella the bedrock is dominated by the large Svarthamaren Charnockite batholith. The batholith is bordered by the Snøtoa metamorphic complex outcropping to the south and west in Mühlig-Hofmannfjella and it is characterized by a high content of partly assimilated country rock inclusions. Mineral paragenesis and geothermometry/geobarometry suggest a two-stage tectonothermal-igneous history with an initial intermediate pressure, upper amphibolite to granulite facies metamorphism followed by high temperature transformations related to the charnockite intrusion. The age of the initial tectonothermal event is probably about 1,100 Ma. Geochronological work in the present study (Rb/Sr whole rock) gave an age of 500 ± 24 Ma for the Svarthamaren Charnockite, interpreted to record the age of crystallization. Late brittle faulting and undeformed dolerite dykes outcropping in Jutulsessen are believed to be related to Mesozoic crustal stretching in the Jutulstraumen-Pencksøkket Rift Zone to the west.
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    • Allen, A. R. 1990:Thc tcctonic and metamorphic evolution of H.U. Sverdrupfjella, wcstcrn Dronning Maud Land, Antarctica. In Thomson ct al. (cds.): Geological evolution of Anfurcticu. Cambridge University Press (in press).
    • Angino, E. E. & Turner, M. D. 1964: Antarctic orogenic belts as delineated by absolute age dates. Pp. 552-556 in Adie, R. J. (ed.): Anrurcric geology. North Holland Puhl. C o . , Amsterdam.
    • Y . Ohta, B . 0. Torudbakken & K . Shiraishi
    • Aucamp, A . P. H . , Wolmarans, L. G . & Neethling, D. C. 1972: The Urfjell Group, a deformed (?) Early Palaeozoic sedimentary sequencc, Kirwanveggen, western Dronning Maud Land. Pp. 557-562 in Adie, R . J. (ed.): Antarctic geology and geophysics. Universitetsforlaget, Oslo.
    • Barton, J . M., Jr. & Copperthwaite, Y . E. 1983: Sr-isotope studies of some intrusive rocks in the Ahlmann Ridge and Annandagstoppane, western Queen Maud Land, Antarctica. Pp. 59-62 in Oliver, R . L . , James, P. R . & Jago, J . B. (eds.): Antarctic earth sciences. Australian Academy of Science, Canberra, and Cambridge University Press.
    • Bohlcn, S . R., Wall, V. J . & Boettchcr, A . L. 1983: Gcobaromctry in granulites. Pp. 141-171 in Saxcna, S . K. (ed.): Kinetics and equilibrium in mineral reactions. Springcr, New York.
    • Dcutsch, S. & Webb, P. N. 1964: Sr/Rh dating on basement rocks from Victoria Land. Pp. 557-562 in Adie, R. J . (ed.): Antarctic geology. North Holland Publ. Co., Amsterdam.
    • Elliot, D. E. 1975: Tectonics of Antarctica, a rcview. A m . Jour Sci. 275, 45-106.
    • Elworthy, T . P. 1982: Gcochronology. Pp. 73-86 in Wolmarans, L. G. & Kent. L. E. (eds.): Geological inoestigations in wrstern Dronning Maud Land, Antarctica - a synthesis. S . Afr. J. Antarct. Res. Suppl. 2.
    • Grindley, G . M . & McDougall, 1. 1969: Age and correlation of the Nimrod Group and other Precambrian rock units in thc central Trans-Antarctic Mountains, Antarctica. New Zealund Jour. Geol. Geophys. 12, 391-411.
    • Grantham, G. H . , Groenewald, P. B . & Hunter, D. R . 1988: Gcology of thc northern 1I.U. Sverdrupfjclla, western Dronning Maud Land, and implications for Gondowana rcconstructions. S. A f r . 7: Nau. Antarct. I X ( I ) ,2-10.
    • Halpcrn, M. 1970: Rubidium-Strontium datc of possibly three billion years for granitc rocks from Antarctica. Science 169, 977-978
    • Hjelle, A. 1972: Some observations on the geology of H.U. Svcrdrupfjella, Dronning Maud Land. Norsk Polarinst. .4.&k 1972, 7-22.
    • Holdaway. M. J. 1971:Stability of andalusite and the aluminium silicatc diagram. A m . Jour. Sci. 271, 97-131.
    • Holdaway, M.J . & Lee, S . M. 1977: Fe-Mg cordierite stability in high grade pelitic rocks based on experimental, theoretical and natural observations. Contr. Miner. Petrol. 63, 175- 198.
    • Krylov, A . Ya. 1972: Antarctic geochronology. Pp. 491-494 in Adic, R . J . (ed.): Antarctic geology and geophysics. Universitetsforlaget, Oslo.
    • Moyes, A . B . 1989: A compilation of radiogenic isotope data f r o m western Dronning Maad Land, Antarctica. Preprint distributed at International Workshop on Antarctic Geochronology, Miinchen, 1989. 9 pp.
    • Neethling, D. C. 1972: Age and corrclation of the Ritscher Supergroup and other Precambrian rock units, Dronning Maud Land. Pp. 547-556 in Adie, R . J . (cd.): Antarctic geology and geophysics. Universitetsforlaget, Oslo.
    • Newton, R . C. & Haselton, H. T . , Jr. 1981: Thermodynamics of the garnet-plagioclase-AI,SiO,-quartz geobarometer. Pp. 131-147 in Newton, R . C., Navarotsky, A. & Wood, B. J . (eds.): Thermodynamics of minerals and melts. Springer, New York.
    • Pankhurst, R . J . & O'Nions, R. K . 1973: Dctcrmination of Rh/Sr and 87Sr/86Srs ratio of some standard rocks and evaluation of X-ray fluorescence spectrometry in Rh-Sr gcochemistry. Chemical Geol. 12, 127-136.
    • Percival, J. A . 1983: High grade metamorphismin the ChaplcauFolyet area, Ontario. A m . Miner. 68, 667-686.
    • Ravich, M. G. & Solovicv, D. S. 1966: Geology and petrology of the mountains of central Queen Maud Land (eastern Antarctica). Trans. Sci. Rcs. Institute of Arctic Geol., Ministry of Geology, USSR. 141 pp. (translated in Jerusalem. 1969).
    • Ravich, M. G. & Krylov, A . Ya. 1964: Absolute ages of rocks from East Antarctica. Pp. 590-596 in Adie, R . J . (cd.): Antarctic geology. North Holland Publ. Co.. Amsterdam.
    • Richardson, S . W. 1968: Staurolite stability in a part of thc system Fe-AI-Si-0-11. Jour. Petrol. 9, 467-488.
    • Ringwood, A. E. & Green, D. H . IY66: An experimental investigation of the gabbro-cclogite transformation and somc geophysical implications. Tectonophys. 3 . 38?-427.
    • Roots, E. F. 1953: Preliminary note on the geology of western Dronning Maud Land. Norsk Geol. Tid.s.\kr. 3 2 , 17-33.
    • Roots, E . F. 1969: Geology of western Queen Maud Land. Antarctic Map Folio Series, Foho 12, Plule 6. Am. Geogr. SOC.
    • Shiraishi, K., Hiroi, Y . , Motoyoshi, Y. & Yanai, K. in press: Plate tcctonic development of Late Proterozoic paired metamorphic complex in eastern Queen Maud Land, East Antarctica, Proceedings of 6th Gondowana Symposium, American Geophysical Union.
    • Thompson, J . B . 1976: Mineral reactions in pelitic rocks. 11. Calculationofsome P-T-X (Fe-Mg) phase relations. American Jour. Sci. 276, 425-454.
    • Wolmaranb, L. G . &Kent, L. E. 1982: Geologicalinoestigations in western Dronning Maud Land, Antarctica - a synthesis. S. A f r . J. Antarct. Res., Suppl. 2. 93 pp.
    • Wones, D. R. & Gilbert, M. C . 1969: Thc fayalitc-magnetitequartz assemblage between 600" and 800°C. American Jour. Sci. 267-A, 480.
    • Wood, B. J. & Banno, S. 1973: Garnet-orthopyroxcnc and orthopyroxene-clinopyroxene relationships in simple and complex systems. Contr. Mineral. Petrol. 42, 109-124.
    • Yiirk, D. 1969: Least squares fitting of a straight line with correlated errors. Earth and Planetary Sci. Letterv 5 , 32& 324.
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