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The structural evolution of the Straumsnutane and western Sverdrupfjella areas, western Dronning Maud Land, Antarctica: implications for the amalgamation of Gondwana

Published online by Cambridge University Press:  10 February 2020

Adam Bumby ,
Geoffrey H. Grantham Open the ORCID record for Geoffrey H. Grantham [Opens in a new window]  and
Neo Geogracious Moabi
Adam Bumby
Affiliation:
Department of Geology, University of Pretoria, Hillcrest, Pretoria, South Africa
Geoffrey H. Grantham*
Affiliation:
Department of Geology, University of Johannesburg, PO Box 524, Auckland Park2006, South Africa
Neo Geogracious Moabi
Affiliation:
Council for Geoscience, P/Bag X112, Pretoria, 0001, South Africa
*
Author for correspondence: Geoffrey Grantham, Email: ghgrantham@uj.ac.za
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Abstract

The study area is located across the Kalahari Craton – Maud Belt boundary in Dronning Maud Land (DML), Antarctica. The ∼1100 Ma Maud Belt in the east is situated where the ∼900–600 Ma East African and ∼530–500 Ma Kuunga orogenies overlap. The Kalahari Craton cover in the west of the study area comprises ∼1100 Ma Straumsnutane Formation lavas in Straumsnutane. In Straumsnutane, early ∼1100 Ma low-grade structures suggest top-to-the-NW deformation. Younger ∼525 Ma structures suggest conjugate top-to-ESE and -WNW transport under low-grade conditions. Western Straumsnutane and Ahlmannryggen do not show the same complex deformation, the intense deformation being restricted to NE Straumsnutane along the eastern margin of the Kalahari Craton. In Sverdrupfjella, in the east, the Maud Belt is underlain by medium-grade, deformed ∼1140 Ma supracrustal gneisses and younger intrusions. Four deformation phases in the gneisses comprise D1 + D2 with top-to-the-N and -NW folds, D3 top-to-the-S and -SE folding and D4 brittle faulting. Syn-D3 emplacement of granitoid veins is inferred at ∼490 Ma. Comparison of the deformation vergence of NE Straumsnutane with western Sverdrupfjella suggests D1 in Straumsnutane is correlatable with D1 + D2 Mesoproterozoic structures in western Sverdrupfjella. D2 deformation in Straumsnutane can be correlated with D3 structures and Cambrian-age granites in Sverdrupfjella. D2 deformation in eastern Straumsnutane and D3 in western Sverdrupfjella are inferred to have occurred in a mega-nappe footwall, implying the Ritscherflya Supergroup cratonic cover in eastern Straumsnutane was partially submerged in the footwall, the mega-nappe formed during Gondwana amalgamation, involving collision between N and S Gondwana in the Kuunga Orogeny, ∼530–500 Ma ago.

Keywords

Gondwana amalgamationKuunga Orogenydeformation historywestern Dronning Maud Land
Type
Original Article
Information
Geological Magazine , Volume 157 , Issue 9 , September 2020 , pp. 1428 - 1450
Copyright
© Cambridge University Press 2020

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References

Angelier, J and Mechler, P (1977) Sur une méthode graphique de recherche des contraintes principals également utilisable en tectonique et en séismologie: la méthode des dièdres droits. Bulletin de la Société Géologique de France 7, 1309–18.CrossRefGoogle Scholar
Baba, S, Horie, K, Hokada, T, Owada, M, Adachi, T and Shiraishi, K (2015) Multiple collisions in the East African–Antarctica Orogen: constraints from timing of metamorphism in the Filchnerfjella and Hochlinfjellet Terranes in Central Dronning Maud Land. The Journal of Geology 123, 55–78.CrossRefGoogle Scholar
Bauer, W, Thomas, RJ and Jacobs, J (2003) Proterozoic-Cambrian history of Dronning Maud Land in the context of Gondwana assembly. In Proterozoic East Gondwana: Supercontinent Assembly and Breakup (eds Yoshida, M, Windley, BF and Dasgupta, S), pp. 247–65. Geological Society of London, Special Publication no. 206Google Scholar
Bingen, B, Jacobs, J, Viola, G, Henderson, IHC, Skår, Ø, Boyd, R, Thomas, RJ, Solli, A, Key, RM and Daudi, EXF (2009) Geochronology of the Precambrian crust in the Mozambique belt in NE Mozambique, and implications for Gondwana assembly. Precambrian Research 170, 231–55.CrossRefGoogle Scholar
Board, WS, Frimmel, HE and Armstrong, RA (2005) Pan-African Tectonism in the western Maud Belt: P-T-t path for high-grade gneisses in the H.U. Sverdrupfjella, East Antarctica. Journal of Petrology 46, 671–99.CrossRefGoogle Scholar
Bons, PD, Elburg, MA and Gomez-Rivas, E (2011) A review of the formation of tectonic veins and their microstructures. Journal of Structural Geology 43, 33–62.CrossRefGoogle Scholar
Cadoppi, P, Costa, M and Sacchi, R (1987) A cross section of the Namama Thrust belt (Mozambique). Journal of African Earth Sciences 6, 493–504.CrossRefGoogle Scholar
Crupa, WE, Khana, SD, Huang, J, Khan, AS and Kasib, A (2017) Active tectonic deformation of the western Indian plate boundary: a case study from the Chaman Fault System. Journal of Asian Earth Sciences 147, 452–68.CrossRefGoogle Scholar
Daszinnies, MC, Jacobs, J, Wartho, J-A and Grantham, GH (2009) Post Pan-African thermo-tectonic evolution of the north Mozambican basement and its implication for the Gondwana rifting. Inferences from 40Ar/39Ar hornblende, biotite and titanite fission-track dating. In Thermochronological Methods: From Palaeotemperature Constraints to Landscape Evolution Models (eds Lisker, F, Ventura, B and Glasmacher, UA), pp. 261–86. Geological Society of London, Special Publication no. 324.Google Scholar
Eastin, R, Faure, G and Neethling, DC (1970) The age of the Trollkjellrygg Volcanics of western Queen Maud Land. Antarctic Journal 5, 157–8.Google Scholar
Fitzsimons, ICW (2000) Grenville-age basement provinces in east Antarctica: evidence for three separate collisional orogens. Geology 28, 879–82.2.0.CO;2>CrossRefGoogle Scholar
Grantham, GH (1996) Aspects of Jurassic magmatism and faulting in western Dronning Maud Land, Antarctica: implications for Gondwana breakup. In Weddell Sea Tectonics and Gondwana Break-up (eds Storey, BC, King, EC and Livermore, RA), pp. 63–71. Geological Society of London, Special Publication no. 108.Google Scholar
Grantham, GH, Armstrong, RA and Moyes, AB (2006) The age, chemistry and structure of mafic dykes at Roerkulten, H.U. Sverdrupfjella, western Dronning Maud Land, Antarctica. In Dyke Swarms: Time Markers of Crustal Evolution (eds Hanski, E., Mertanen, S, Ramo, T and Vuollo, J), pp. 213–24. Proceedings of the Fifth/Fourth International Dyke Conference (IDC5), Rovaniemi, Finland. Rotterdam: A.A. Balkema Press.CrossRefGoogle Scholar
Grantham, GH, Jackson, C, Moyes, AB, Groenewald, PB, Harris, PD, Ferrar, G and Krynauw, JR (1995) The tectonothermal evolution of the Kirwanveggan-H.U. Sverdrupfjella areas, Dronning Maud Land, Antarctica. Precambrian Research 75, 209–30.Google Scholar
Grantham, GH, Kramers, J, Eglington, B and Burger, EP (2019) The Ediacarian-Cambrian tectonic evolution of western Dronning Maud Land: new 40Ar−39Ar and Sr/Nd data from Sverdrupfjella and Kirwanveggan, the source of the Urfjell Group and implications for the Kuunga Orogeny and Gondwana amalgamation. Precambrian Research. doi: 10.1016/j.precamres.2019.105444.CrossRefGoogle Scholar
Grantham, GH, Maboko, M and Eglington, BM (2003) A review of the evolution of the Mozambique Belt and implications for the amalgamation of Rodinia and Gondwana. In Proterozoic East Gondwana: Supercontinent Assembly and Breakup (eds Yoshida, M, Windley, BF and Dasgupta, S), pp. 401–26. Geological Society of London, Special Publication no. 206.Google Scholar
Grantham, GH, Macey, PH, Horie, K, Kawakami, T, Ishikawa, I, Satish-Kumar, M, Tsuchiya, N, Graser, P and Azevedo, S (2013) Comparison of the metamorphic history of the Monapo Complex, northern Mozambique and Balchenfjella and Austhameren areas, Sør Rondane, Antarctica: Implications for the Kuunga Orogeny and the amalgamation of N and S. Gondwana. Precambrian Research 234, 85–135.CrossRefGoogle Scholar
Grantham, GH, Macey, PH, Ingram, BA, Roberts, MP, Armstrong, RA, Hokada, T, Shiraishi, K, Jackson, C, Bisnath, A and Manhica, V (2008) Terrane correlation between Antarctica, Mozambique & Sri Lanka; comparisons of geochronology, lithology, structure and metamorphism and possible implications for the geology of southern Africa and Antarctica. In Geodynamic Evolution of East Antarctica: A Key to the East-West Gondwana Connection (eds Satish-Kumar, M, Motoyoshi, Y, Osanai, Y, Hiroi, Y and Shiraishi, K), pp. 91–119. Geological Society of London, Special Publication no. 308.Google Scholar
Grantham, GH, Manhica, ADST, Armstrong, RA, Kruger, FJ and Loubser, M (2011) New SHRIMP, Rb/Sr and Sm/Nd isotope and whole rock chemical data from central Mozambique and western Dronning Maud Land, Antarctica: implications for the nature of the eastern margin of the Kalahari Craton and the amalgamationof Gondwana. Journal of African Earth Sciences 59, 74–100.CrossRefGoogle Scholar
Grantham, GH, Moyes, AB and Hunter, DR (1991) The age, petrogenesis and emplacement of the Dalmatian Granite, H.U. Sverdrupfjella, Dronning Maud Land, Antarctica. Antarctic Science 3, 197–204.CrossRefGoogle Scholar
Grantham, GH, Storey, BC, Thomas, RJ, and Jacobs, J (1997) The pre-breakup position of Haag Nunataks within Gondwana: possible correlatives in Natal and Dronning Maud Land. In The Antarctic Region: Geological Evolution and processes (ed. Ricci, C.A.), pp. 13–20. Proceedings of the VII International Symposium on Antarctic Earth Sciences, Siena. Terra Antarctica.Google Scholar
Groenewald, PB (1993) Correlation of cratonic and orogenic provinces in southeastern Africa and Dronning Maud Land, Antarctica. In Gondwana Eight (eds Findlay, RH, Unrug, R, Banks, MR and Veevers, JJ), pp. 111–23. Rotterdam: Balkema Press.Google Scholar
Groenewald, PB and Hunter, DR (1991) Granulites of northern H.U. Sverdrupfjella, western Dronning Maud Land: metamorphic history from garnet-pyroxene assemblages, coronas and hydration reactions. In Geological Evolution of Antarctica (eds Thomson, MRA, Crame, JA and Thomson, JW), pp. 61–7. Cambridge: Cambridge University Press.Google Scholar
Grosch, EG, Bisnath, A, Frimmel, HE and Board, WS (2007) Geochemistry and tectonic setting of mafic rocks in western Dronning Maud Land, East Antarctica: implications for the geodynamic evolution of the Proterozoic Maud Belt. Journal of the Geological Society, London 164, 465–75.CrossRefGoogle Scholar
Grosch, EG, Frimmel, HE, Abu-Alam, T and Košler, J (2015) Metamorphic and age constraints on crustal reworking in the western H.U. Sverdrupfjella: implications for the evolution of western Dronning Maud Land, Antarctica. Journal of the Geological Society of London 172, 499–518.CrossRefGoogle Scholar
Grunow, A, Hanson, R and Wilson, T (1996) Were aspects of Pan-African deformation linked to Iapetus opening? Geology 24, 1063–6.2.3.CO;2>CrossRefGoogle Scholar
Hanson, RE, Harmer, RE, Blenkinsop, TG, Bullen, DS, Dalziel, IWD, Gose, WA, Hall, RP, Kampunzu, AB, Key, RM, Mukwakwami, J, Munyanyiwa, H, Pancake, JA, Seidel, EK and Ward, SE (2006) Mesoproterozoic intraplate magmatism in the Kalahari Craton: a review. Journal of African Earth Sciences 46, 141–67.CrossRefGoogle Scholar
Harris, C and Grantham, GH (1993) Geology and petrogenesis of the Straumsvola nepheline syenite complex, Dronning Maud Land, Antarctica. Geological Magazine 130, 513–32.CrossRefGoogle Scholar
Harris, C, Watters, BR and Groenewald, PB (1991) Geochemistry of the Mesozoic regional basic dykes of western Dronning Maud Land, Antarctica. Contributions to Mineralogy and Petrology 107, 100–11.CrossRefGoogle Scholar
Jacobs, J, Ahrendt, H, Kreutzer, H and Weber, K (1995) K-Ar, 40Ar/39Ar and apatite fission-track evidence for Neoproterozoic and Mesozoic basement rejuvenation events in the Heimefrontfjella and Mannefallknausane (East Antarctica). Precambrian Research 75, 251–62.Google Scholar
Jacobs, J and Thomas, RJ (2004) Himalayan-type indenter-escape tectonics model for the southern part of the late Neoproterozoic–early Paleozoic East African–Antarctic orogen. Geology 32, 721–4.CrossRefGoogle Scholar
Jacobs, J, Bauer, W, Spaeth, G, Thomas, RJ and Weber, K (1996) Lithology and structure of the Grenville-aged (∼1.1Ga) basement of Heimefrontfjella. Geologische Rundschau 85, 800–21.Google Scholar
Jacobs, J, Bauer, W and Fanning, CM (2003a) New age constraints for Grenvilian age metamorphism in western central Dronning Maud Land (East Antarctica) and implications for the paleogeography of Kalahari in Rodinia. Geologische Rundschau 92, 301–15.Google Scholar
Jacobs, J, Bauer, W and Fanning, CM (2003b) Late Neoproterozoic/Early Paleozoic events in central Dronning Maud Land and significance for the southern extension of the East African Orogen into East Antarctica. Precambrian Research 126, 27–53.CrossRefGoogle Scholar
Jacobs, J, Bingen, B, Thomas, RJ, Bauer, W, Wingate, MTD and Feitio, P (2008) Early Palaeozoic orogenic collapse and voluminous late-tectonic magmatism in Dronning Maud Land and Mozambique: insights into the partially delaminated orogenic root of the East African-Antarctic Orogen? In Geodynamic Evolution of East Antarctica: A Key to the East-West Gondwana Connection (eds Satish-Kumar, M, Motoyoshi, Y, Osanai, Y, Hiroi, Y and Shiraishi, K), pp. 69–90. Geological Society of London, Special Publication no. 308.Google Scholar
Jacobs, J, Fanning, CM, Henjes-Kunst, F, Olesch, M and Paech, HJ (1998) Continuation of the Mozambique Belt into East Antarctica: Grenville age metamorphism and Polyphase Pan-African high grade events in Central Dronning Maud Land. Journal of Geology 106, 385–406.CrossRefGoogle Scholar
Jacobs, J, Falter, M, Weber, K and Jessberger, EK (1997) 40Ar/39Ar evidence for the structural evolution of the Heimefront Shear Zone (western Dronning Maud Land), East Antarctica. In The Antarctic Region: Geological Evolution and processes (ed. Ricci, CA), pp 37–44. Proceedings of the VII International Symposium on Antarctic Earth Sciences, Siena. Terra Antarctica.Google Scholar
Jacobs, J, Hansen, BT, Henjes-Kunst, F, Thomas, RJ, Weber, K, Bauer, W, Armstrong, RA and Cornell, DH (1999) New age constraints on the Proterozoic/Lower Paleozoic evolution of Heimefrontfjella, East Antarctica, and its bearing on Rodinia/Gondwana correlations. Terra Antartica 6, 377–89.Google Scholar
Jacobs, J, Klemd, R, Fanning, CM, Bauer, W and Colombo, F (2003c) Extensional collapse of the late Neoproterozoic-early Paleozoic East African-Antarctic Orogen in Central Dronning Maud Land, East Antarctica. In Proterozoic East Gondwana: Supercontinent Assembly and Breakup (eds Yoshida, M, Windley, BF and Dasgupta, S), pp. 271–87. Geological Society of London, Special Publication no. 206.Google Scholar
Krynauw, JR and Jackson, C (1996) Geological evolution of western Dronning Maud Land within a Gondwana framework. South African National Antarctic Programme Final Report 1991–1996. Geology Subsection, 1–48.Google Scholar
Macey, PH, Miller, JA, Rowe, CD, Grantham, GH, Siegfried, P, Armstrong, RA, Kemp, J and Bacalau, J (2013) Geology of the Monapo Klippe, NE Mozambique and its significance for assembly of central Gondwana. Precambrian Research 233, 259–81.CrossRefGoogle Scholar
Macey, PH, Thomas, RJ, Grantham, GH, Ingram, BA, Jacobs, J, Armstrong, RA, Roberts, MP, Bingen, B, Hollick, L, de Kock, GS, Viola, G, Bauer, W, Gonzales, E, Bjerkgård, T, Henderson, IHC, Sandstad, JS, Cronwright, MS, Harley, S, Solli, A, Nordgulen, Ø, Motuza, G, Daudi, E and Manhiça, V (2010) Mesoproterozoic geology of the Nampula Block, northern Mozambique: tracing fragments of Mesoproterozoic crust in the heart of Gondwana Precambrian Research 182, 124–48.CrossRefGoogle Scholar
Marschall, HR, Hawkesworth, CJ and Leat, PT (2013) Mesoproterozoic subduction under the eastern edge of the Kalahari-Grunehogna Craton preceding Rodinia assembly: the Ritscherflya detrital zircon record, Ahlmannryggen, Dronning Maud Land, Antarctica. Precambrian Research 236, 31–45.CrossRefGoogle Scholar
Marschall, HR, Hawkesworth, CJ, Storey, CD, Dhuime, B, Leat, PT, Meyer, H-P and Tamm-Buckle, S (2010) The Annandagstoppane granite, East Antarctica: evidence for Archaean intracrustal recycling in the Kaapvaal-Grunehogna craton from zircon O and Hf isotopes. Journal of Petrology 51, 2277–301.CrossRefGoogle Scholar
Meert, J (2003) A synopsis of events related to the assembly of eastern Gondwana. Tectonophysics 362, 1–40.CrossRefGoogle Scholar
Mendonidis, P, Thomas, RJ, Grantham, GH and Armstrong, RA (2015) Geochronology of emplacement and charnockite formation of the Margate Granite Suite, Natal Metamorphic Province, South Africa: implications for Natal-Maud belt correlations. Precambrian Research 265, 198–202.CrossRefGoogle Scholar
Mieth, M and Jokat, W (2014) New aeromagnetic view of the geological fabric of southern Dronning Maud Land and Coats Land, East Antarctica. Gondwana Research 25, 358–67.CrossRefGoogle Scholar
Moabi, NG, Grantham, GH, Roberts, J and le Roux, P (2017) The geology and geochemistry of the Straumsnutane Formation, Straumsnutane, western Dronning Maud Land, Antarctica and its tectonic setting on the western margin of the Kalahari Craton: additional evidence linking it to the Umkondo Large Igneous Province. In Crustal Evolution of India and Antarctica: The Supercontinent Connection (eds Pant, NC and Dasgupta, S), pp. 61–85. Geological Society of London, Special Publication no. 457.Google Scholar
Pauly, J, Marschall, HR, Meyer, H-P, Chatterjee, N and Monteleone, B (2016) Prolonged Ediacaran–Cambrian metamorphic history and short-lived high-pressure granulite facies metamorphism in the H.U. Sverdrupfjella, Dronning Maud Land (East Antarctica): evidence for continental collision during Gondwana assembly. Journal of Petrology 57, 185–228.CrossRefGoogle Scholar
Perrit, SH and Watkeys, MK (2003) Implications of late Pan-African shearing in western Dronning Maud Land, Antarctica. In Intraplate strike-slip deformation belts (eds Storti, F, Holdsworth, RE and Salvini, F), pp. 135–43. Geological Society of London, Special Publication no. 210.Google Scholar
Peters, M (1989) Igneous rocks in western and central Neuschwabenland, Vestfjella and Ahlmannryggen, Antarctica: petrography, geochemistry, geochronology, paleomagnetism, geotectonic implications. Berichte zur Polarforschung 61, 78–80.Google Scholar
Peters, M, Haverkamp, B, Emmermann, R, Kohnen, H and Weber, K (1990) Paleomagnetism, K-Ar dating and geodynamic setting of igneous rocks in western and central Neuschwabenland, Antarctica. In Geological Evolution of Antarctica (eds Thompson, MRA, Crame, JA and Thompson, JW), pp. 549–55. Cambridge: Cambridge University Press.Google Scholar
Ramsay, JG (1967) Folding and Fracturing of Rocks. New York: McGraw-Hill Book Co., 568 pp.Google Scholar
Riedel, S, Jokat, W and Steinhage, D (2012) Mapping tectonic provinces with airborne gravity and radar data in Dronning Maud Land, East Antarctica. Geophysical Journal International 189, 414–27.CrossRefGoogle Scholar
Riley, TR, Leat, PT, Curtis, ML, Millar, IL, Duncan, RA and Fazel, A (2005) Early-Middle Jurassic dolerite dykes from western Dronning Maud Land (Antarctica): identifying mantle sources in the Karoo large igneous province. Journal of Petrology 46, 1489–524.CrossRefGoogle Scholar
Rose, KC, Ferraccioli, F, Jamieson, SJR, Bell, RE, Corr, H, Creyts, T, Braaten, T, Jordan, TA, Fretwell, PT and Damaske, D (2013) Early East Antarctic Ice Sheet growth recorded in the landscape of the Gamburtsev Subglacial Mountains. Earth and Planetary Science Letters 375, 1–12.CrossRefGoogle Scholar
Shackleton, RM (1996) The final collision between East and West Gondwana: where is it? Journal of African Earth Sciences 23, 271–87.CrossRefGoogle Scholar
Silva, KPL, Wimalasena, EM, Sarathchandra, MJ, Munasinghe, T and Dasannayake, CB (1981) The geology and origin of the Kataragama Complex of Sri Lanka. Journal of the National Science Council of Sri Lanka 9, 189–97.Google Scholar
Spaeth, G (1987) Aspects of the structural evolution and magmatism in western New Schabenland, Antarctica. In Gondwana Six: Structure, Tectonics and Geophysics (ed. McKenzie, GD), pp. 295–307. Washington, DC: American Geophysical Union, 323 pp.Google Scholar
Spaeth, G and Fielitz, W (1987) Structural investigations in the Precambrian of western Neuschwabenland, Antarctica. Polarforsching 57, 71–92.Google Scholar
Stern, RJ (1994) Arc assembly and continental collision in the Neoproterozoic East African Orogen: implications for the consoildation of Gondwanaland. Annual Reviews Earth Science 22, 319–51.CrossRefGoogle Scholar
Stern, RJ (2002) Crustal evolution in the East African Orogen: a neodymium isotopic perspective Journal of African Earth Sciences 34, 109–17.CrossRefGoogle Scholar
Tsukada, K, Yuhara, M, Owada, M, Shimura, T, Kamei, A, Kouchi, Y and Yamamoto, K (2017) A low-angle brittle shear zone in the western Sør Rondane Mountains, Dronning Maud Land, East Antarctica – implication for assembly of Gondwanaland. Journal of Geodynamics 111, 15–30.CrossRefGoogle Scholar
Wai-Pan Ng, S, Whitehouse, MJ, Tama, TP, Jayasingha, P, Wonga, JP, Denyszyn, SW, Yiu, JS and Chang, S-C (2017) Ca. 820–640 Ma SIMS U-Pb age signal in the peripheral Vijayan Complex, Sri Lanka: identifying magmatic pulses in the assembly of Gondwana. Precambrian Research 294, 244–56.Google Scholar
Watters, BR (1972) The Straumsnutane Volcanics, western Dronning Maud Land, Antarctica. South African Journal of Antarctic Research 2, 23–31.Google Scholar
Watters, BR, Krynauw, JR and Hunter, DR (1991) Volcanic rocks of the Proterozoic Jutulstraumen Group in western Dronning Maud Land, Antarctica. In Geological Evolution of Antarctica (eds Thomson, MRA, Crame, JA and Thomson, JW), pp. 41–6. Cambridge: Cambridge University Press.Google Scholar
Wilson, TJ, Grunow, AM and Hanson, RE (1997) Gondwana assembly: the view from southern Africa and East Gondwana. Journal of Geodynamics 23, 263–8.CrossRefGoogle Scholar
Wolmarans, LG and Kent, LE (1982) Geological investigations in western Dronning Maud Land, Antarctica – a synthesis. South African Journal of Antarctic Research, Suppl. 2, 93 pp.Google Scholar