| THISTLEWOOD, L., LEAT, P. T., MILLAR, I. L., STOREY, B. C., VAUGHAN, A. P. M. (1997) Basement geology and PalaeozoicâMesozoic mafic dykes from the
Cape Meredith Complex, Falkland Islands: a record of repeated
intracontinental extension. Geological Magazine, 134 (3) 355-367 doi:10.1017/s0016756897007085 | Journal (article/letter/editorial) | PalaeozoicâMesozoic mafic dykes from the Cape Meredith Complex, Falkland Islands: a record of repeated intracontinental...and granitoids of the Cape Meredith Complex on the southern tip of West Falkland, provide an important...lamprophyres and Jurassic Ferrartype magmas in the Cape Meredith Complex demonstrate for the first time that the...Introduction The Cape Meredith Complex on the southern tip of West Falkland, Falkland Islands, is important...1; Beckinsale et al. 1976; Tarney, 1976), the complex is the only observed continental crystalline basement | | | Journal (article/letter/editorial) | evolution of the Mesoproterozoic Cape Meredith Complex, West Falkland ROBERT J. THOMAS*, JOACHIM JACOBSâ ...metamorphic and igneous rocks of the Cape Meredith Complex, West Falkland. The data indicate that the oldest...the Big Cape Formation, which form three petrographic and geochemical groups (mafic amphibolite, quart...extruded in an island-arc at around 1120 Ma. The Big Cape Formation was intruded by granitoids during and...characteristics and geological evolution of the Cape Meredith Complex is comparable with that of the adjacent | | | Journal (article/letter/editorial) | ARCs at 2.078 Ga and by those of the Bushveld Complex and elsewhere between 2.061 and 2.054 Ga, and impacted...In contrast, the Natal Belt, including the Falkland Islands, acted from 1.25 Ga to 1.0 Ga, with TDM 2...was the intrusion of 520 Ma lamprophyre at Cape Meredith. A belt of âź1.1 Ga magmaticâmetamorphic rocks...the Grunehogna Province, the âź1.1 Ga NatalâFalkland Islands extend through the Maud Belt of DML through... by the 0.52 Ga alkaline rocks at Cape Meredith, Falkland Islands, and by the 3.0 Ga intrusions of the | | Jacobs, J., Bauer, W., Spaeth, G., Thomas, R. J., Weber, K. (1996) Lithology and structure of the Grenville-aged (~1.1âGa) basement of Heimefrontfjella (East Antarctica) Geologische Rundschau, 85 (4) 800-821 doi:10.1007/s005310050113 | Journal (article/letter/editorial) | Sivorg and Kottas terranes were metamorphosed to amphibolite facies grade. PâT estimates show that peak metamorphic...were juxtaposed and pervasively deformed during a complex J. Jacobs (Y) Universität Bremen, FB5-Geowissenschaften...Canada through Texas into East Antarctica, the Falkland Islands and southern Africa (the NamaquaNatal belt;...nunataks, in western Dronning Maud Land, the Falkland Islands and in southern Africa. Arrows indicate main...Reconstruction of east Antarctica, southern Africa and the Falkland microplate after Martin and Hartnady (1986) and | | Jacobs, J., Bauer, W., Spaeth, G., Thomas, R. J., Weber, K. (1996) Litholog and structure of the Grenville-aged (â1.1 Ga) basement of heimefrontfjella (East Antarctica) Geologische Rundschau, 85 (4) 800-821 doi:10.1007/bf02440112 | Journal (article/letter/editorial) | Sivorg and Kottas terranes were metamorphosed to amphibolite facies grade. P-T estimates show that peak metamorphic...were juxtaposed and pervasively deformed during a complex Abstract J. Jacobs (Y:~) Universit~t Bremen, ...Canada through Texas into East Antarctica, the Falkland Islands and southern Africa (the NamaquaNatal belt;...southeast by the Grenville-aged belt exposed (from west to east) in Mannefallknausane, Heimefrontfjella...Haag nunataks, in western Dronning Maud Land, the Falkland the Mesoproterozoic belt and the Archaean crust | | | Journal (article/letter/editorial) | of Edinburgh, Grant Institute, Kingâs Buildings, West Mains Road, Edinburgh EH9 3JW, UK d British Geological...Craton are now exposed in East- and West-Antarctica, the Falkland Islands and possibly also in South America...Gondwana in the Neoproterozoic, giving rise to a complex history of growth and accretion, rifting and dispersal...smaller fragments now near South America (Falkland Islands), different parts of Antarctica (Dronning...evolved within and along an island-arc/back-arc complex that finally collided with, and was thrust onto | | Mendonidis, P., Thomas, R.J., Grantham, G.H., Armstrong, R.A. (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. 189-202 doi:10.1016/j.precamres.2015.02.013 | Journal (article/letter/editorial) | 49 2 the Margate Terrane is longer and more complex than previously thought. The original granite protolith...Natal belt. In this scenario, the Cape Merdith Complex, West Falkland, which shows no zircon evidence of...(Jacobs et al, 1993; Grantham et al, 1997), via the Falkland microplate (e.g. Thomas et al., us 1997) and... 2006). Although the timing of events in this complex terrane M collage has to a large extent been...the implications for crustal evolution in this complex region and its bearing on Rodinia development. | | | Journal (article/letter/editorial) | Sikombe Granite from northeastern Transkei (Eastern Cape Province). The outcrops form the most southerly...regarded as possibly forming a separate southerly, amphibolite facies terrane of the NMP, as the lithological...coastal outcrop in the former Transkei (now Eastern Cape Province), some 15km south of the Mtamvuna River...similarities with the âG2â augen gneisses of the Cape Meredith Complex, which may have lain close to southern KwaZulu-Natal...be the exposed part of a separate southerly, amphibolite facies terrane of the NMP, occurring as a âoutboard | | Riley, T.R., Flowerdew, M.J., Pankhurst, R.J., Millar, I.L., Whitehouse, M.J. (2020) U-Pb zircon geochronology from Haag Nunataks, Coats Land and Shackleton Range (Antarctica): Constraining the extent of juvenile Late Mesoproterozoic arc terranes. Precambrian Research, 340. 105646 doi:10.1016/j.precamres.2020.105646 | Journal (article/letter/editorial) | Cross, Madingley Road, Cambridge, CB3 0ET, UK. West Building, Madingley Rise, Madingley Road, Cambridge...from the Mesoproterozoic Haag Nunataks gneiss complex of West Antarctica where the dominant granodiorite...potential correlation with the Haag Nunataks gneiss complex. The magmatic precursors of the Haag Nunataks orthogneisses...quartzo-feldspathic gneisses of Haag Nunataks in West Antarctica (Fig. 1a (Millar and Pankhurst, 1987;...Ellsworth-Whitmore Mountains (EWM) micro-continental block of West Antarctica, which was displaced during 4 Gondwana | | LINDEQUE, A., DE WIT, M. J., RYBERG, T., WEBER, M., CHEVALLIER, L. (2011) DEEP CRUSTAL PROFILE ACROSS THE SOUTHERN KAROO BASIN AND BEATTIE MAGNETIC ANOMALY, SOUTH AFRICA: AN INTEGRATED INTERPRETATION WITH TECTONIC IMPLICATIONS. South African Journal of Geology, 114 (3) 265-292 doi:10.2113/gssajg.114.3-4.265 | Journal (article/letter/editorial) | Council for Geoscience, Western Cape, P.O. Box 572, 7535 Bellville, Cape Town, South Africa e-mail: ansalique@gmail...Council for Geoscience, Western Cape, P.O. Box 572, 7535 Bellville, Cape Town, South Africa e-mail: lc...prominent geological features such as the Karoo Basin, Cape Fold Belt (CFB) and the Beattie Magnetic Anomaly...sub-horizontal ~1.5 to 10 km thick wedge of the Cape Supergroup (CSG). This CSG wedge stretches from...Southernmost Africa is dominated by the PalaeozoicMesozoic Cape Fold Belt (CFB) and its flanking CapeKaroo Basin | | Schilling, Manuel Enrique, Carlson, Richard Walter, Tassara, AndrĂŠs, Conceição, Rommulo Vieira, Bertotto, Gustavo Walter, VĂĄsquez, Manuel, MuĂąoz, Daniel, Jalowitzki, Tiago, Gervasoni, Fernanda, Morata, Diego (2017) The origin of Patagonia revealed by Re-Os systematics of mantle xenoliths. Precambrian Research, 294. 15-32 doi:10.1016/j.precamres.2017.03.008 | Journal (article/letter/editorial) | located between the DM and the Malvinas/Falkland Islands, where Grenville-age metamorphic rocks are...that southern Patagonia and the Malvinas/Falkland Islands and plateau constitute an integrated and relatively...12, Cerro del Fraile; 13, Pali Aike, and 14, Cape Meredith (Cabo Belgrano). In contrast, to the north...rocks are found at Cape Meredith (or Cabo Belgrano) in the Malvinas/Falkland Islands (Cingolani and Varela...have supported the idea that the Malvinas/Falkland Islands previously formed an easterly extension of | | | Journal (article/letter/editorial) | Maud Land) +8to+9 (Horlick Mts) +Ito+4 (Vijayan Complex) 1.75 3.5 East Africa 1.3-0.9 0.5 1.0 Australia...Baltica 1.3-1.2 -1to +5 (Kibaran) +2.5 (Fraser Complex) + 2 to +7 (Tromoy) + 3 to + 4 (Bandak Gp) 0.2...rocks, highly deformed and metamorphosed to amphibolite or granulite facies, are exposed in the Llano...high-grade plutonic rocks. In the Van Horn area of West Texas, deformed arc volcanics and sediments are...the late Paleozoic. Mosher (1998) has proposed a complex plate tectonic model for the Texas Grenvillian | | | Journal (article/letter/editorial) | continues to the west (Antarctica reconstructed to its position within Gondwana) trough the Falkland Plateau (Cape...(Cape Meredith Complex; Mitchell et al., 1986) and into the Natal Metamorphic Province (South Africa)...into a western granulite terrain and an eastern amphibolite terrain, separated by the dextral Heimefront...VK= Vardeklettane. The oldest rocks in the amphibolite terrain comprise a bimodal suite consisting of...(Kottasberge, Fig. 1) a diorite-tonalite-trondhjemite complex with talc-alkaline geochemical affinities occurs | | | Journal (volume) | Mesoproterozoic basement exposed in the West Falkland Islands and Haag nunataks, West Antarctica. The initial ÎľNd..........................................15 3.4 Falkland and Ellsworth-Haag microplates .....................................................16 3.4.1 Falkland microplate......................................g. Corner 1994). Suture zones are geologically complex and tectonically disturbed, and often provide a...of the juncture of East Antarctica, Africa, the Falkland microplate and the Ellsworth-Haag microplate (Jacobs | | | Journal (article/letter/editorial) | useful to recollecting dispersal of Pangea, and the complex geographical and geological picture emerging from...its break-up and dispersal after the Triassic. A complex framework of continental blocks and fragments of...Western Gondwana also reveals that it comprises a complex arrangement of a great diversity of large, intermediate...1991), suggesting that Laurentia was placed to the west of Gondwana until early Phanerozoic times (Moores...admitting that Laurentia circumscribed Gondwana to the west. On the other hand, it has to be stressed that these | | Jacobs, J., Falter, M., Thomas, R.J., Kunz, J., JeĂberger, E.K. (1997) 40Ar39Ar Thermochronological constraints on the structural evolution of the Mesoproterozoic Natal Metamorphic Province, SE Africa. Precambrian Research, 86 (1) 71-92 doi:10.1016/s0301-9268(97)00042-9 | Journal (article/letter/editorial) | Grenvilleaged crust of southern Africa, the Falkland Islands The Mesoproterozoic ( ~ 1.1 Ga) Natal Metamorphic...Namaqualand to Natal in South Africa, into the Falkland Islands and into Dronning Maud Land (east Antarctica)...++++~z +++++~ á ++++ India , Falkland microplate Cape Meredith Complex Haag block #/ iella # E-Antarctica...hornblende separates from carefully selected amphibolite facies mylonites and their undeformed equivalents...'Natal Thrust Belt', and the southern 'Natal Nappe Complex' (Matthews, 1972; Matthews and Charlesworth, 1981) | | Wang, Cheng-Cheng, Jacobs, Joachim, Elburg, Marlina A., Läufer, Andreas, Thomas, Robert J., Elvevold, Synnøve (2020) Grenville-age continental arc magmatism and crustal evolution in central Dronning Maud Land (East Antarctica): Zircon geochronological and HfâO isotopic evidence. Gondwana Research, 82. 108-127 doi:10.1016/j.gr.2019.12.004 | Journal (article/letter/editorial) | Council for Geoscience, 3 Oos Street, Bellville, 7535, Cape Town, South Africa e Norwegian Polar Institute...elevated δ18O values (8â10â°). Samples from further west, na in Gjelsvikfjella have more mantle-like zircon...Natal Belt in southern Africa, which lay to the west in the context of Gondwana, although this assertion...accretion of (slightly older) juvenile oceanic islands in the Natal Belt, which, in contrast to the Maud...Gjelsvikfella and the MĂźhlig-Hofmann-Gebirge re in the west from the Orvin-Wohlthat mountains in the east (Fig | | | Report (issue) | J. J. Veevers . Southern Africa: Karoo Basin and Cape Fold Belt ...................0404. J. J. Veevers...1992), (4) Grunow et al.âs (1991) reconstruction of West Antarctica, and (5) the clearer dating of the magmatic...Thurston Island: Implications for the tectonics of West Antarctica and Weddell Sea opening: Journal of Geophysical...1990, The Paleozoic and Andean magmatic arcs of West Antarctica and southern South America: Geological...Thus, East (Australia, India and Antarctica) and West (South America and Africa) Gondwanaland can be | | Spencer, Christopher J., Thomas, Robert J., Roberts, Nick M.W., Cawood, Peter A., Millar, Ian, Tapster, Simon (2015) Crustal growth during island arc accretion and transcurrent deformation, Natal Metamorphic Province, South Africa: New isotopic constraints. Precambrian Research, 265. 203-217 doi:10.1016/j.precamres.2015.05.011 | Journal (article/letter/editorial) | Terranes record protracted magmatism in an island arc complex from âź1200 Ma to 1160 Ma, followed by the accretion...similar age metamorphic province in the Northern Cape â Corresponding author. Current address: Department...Johnston et al., 2001). The terrane underwent upper-amphibolite to lower-granulite grade metamorphism, overprinted...(1972) interpreted the terrane as an ophiolite complex, which was obducted over the rigid Kaapvaal cratonic... whereas the Mzumbe Terrane is dominated by amphibolite-facies rocks (Thomas, 1989a; Thomas et al., 1992; | | | Book | Paleozoic basement Chapter 21 Evolution of the West Siberian Basin 755 A.V. Vyssotski, V.N. Vyssotski... Contents Chapter 23 Ceodynamic interpretation of the Cape and Karoo basins, South Africa 869 Anthony Tankard... Tectonic framework 872 23.3 Early Paleozoic Cape basin:Large extensional subsidence 882 23.4 Permian...early Karoo basin: Large-scaleepeirogeny 894 23.5 Cape orogeny and late Karoo foreland basin 910 23.6...Acknowledgments 931 References 931 Chapter 24 The Parry Islands fold belt 947 J.C. Harrison, T.A. Brent 24.1 | | | Book | correlated them with comparable deposits in the Cape Fold Belt (Keidel 1914, 1916, 1938). Motivated by...succession on the eastern side of the Atlantic, between Cape Town and LĂźderitz, and also possess a strike that...are intrusive, just as in the Nama beds between Cape Town and Namaqualand. These rocks were characterized...between the Sierras Australes de Buenos Aires and the Cape Fold Belt (black lines). Handwritten notes made...that, by the early Ediacaran, the Amazonian and West Africa Cratons were probably still attached to Laurentia | | | Book | UâPb Baddeleyite Ages of MaďŹc Dyke Swarms of the West African and Amazonian Cratons: Implication for Their...from doleritic dykes in the southern part of the West African Craton. The following swarms are distinguished:...provides the ďŹrst robust LIP bar code for the southern West African Craton, and the results are used in a new...Western Mongolian Altai, Eastern Junggar, North and West Bank of Balkhash, Western Junggar, and Chingis-Taerbahatai...Emplaced in the Upper Jurassic Qorveh Granitoid Complex (Majidaba and Kangareh), Kurdistan Province, Iranâ) |
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