Title Terrane correlation between Antarctica, Mozambique and Sri Lanka; comparisons of geochronology, lithology, structure and metamorphism and possible implications for the geology of Southern Africa and Antarctica
Author Grantham, G.H.; Macey, P.H.; Ingram, B.A.; Roberts, M.P.; Armstrong, R.A.; Hokada, T.; Shiraishi, K.; Jackson, C.; Bisnath, A.; Manhica, V.
Author Affil Grantham, G.H., Council for Geoscience, Pretoria, South Africa. Other: National Institute of Polar Research, Japan; Kyushu University, Japan; Chiba University, Japan; Geological Survey of Papua New Guinea, Papua New Guinea; Australian National University, Australia; National Institute of Polar Research, Japan; Caracle Creek International Consulting, South Africa; Direcao Nacional Geologia, Mozambique
Source Geodynamic evolution of East Antarctica; a key to the east-west Gondwana connection, edited by M. Satish-Kumar, Y. Motoyoshi, Y. Osanai, Y. Hiroi and K. Shiraishi. Geological Society Special Publications, Vol.308, p.91-119, . Publisher: Geological Society of London, London, United Kingdom. ISSN: 0305-8719. ISBN: 978-1-86239- 268-7
Publication Date 2008
Notes In English. 105 refs. Ant. Acc. No: 85815
Index Terms Mozambique; Antarctica--Queen Maud Land; Sri Lanka; absolute age; Africa; Antarctica; Asia; basement; Cambrian; correlation; crust; dates; East Africa; geochronology; Gondwana; igneous rocks; International Polar Year 2007-08; IPY 2007-08 Research Publications; Lurio Belt; metamorphic rocks; metamorphism; Nampula Block; Namumo Block; Neoproterozoic; nesosilicates; orthosilicates; P-T conditions; paleogeography; Paleozoic; Pb/Pb; petrofabrics; plutonic rocks; Precambrian; Proterozoic; Queen Maud Land; silicates; tectonics; terranes; U/Pb; upper Precambrian; zircon; zircon group
Abstract Analysis of new lithological, structural, metamorphic and geochronological data from extensive mapping in Mozambique permits recognition of two distinct crustal blocks separated by the Lurio Belt shear zone. Extrapolation of the Mozambique data to adjacent areas in Sri Lanka and Dronning Maud Land, Antarctica permits the recognition of similar crustal blocks and allows the interpretation that the various blocks in Mozambique, Sri Lanka and Antarctica were once part of a mega-nappe, forming part of northern Gondwana, which was thrust-faulted c. 600 km over southern Gondwana during amalgamation of Gondwana at c. 590-550 Ma. The data suggest a deeper level of erosion in southern Africa compared with Antarctica. It is possible that this thrust domain extends, through the Zambezi Belt or Valley, as far west as the Damara Orogen in Namibia with the Naukluft nappes in Namibia, the Makuti Group, the Masoso Suite in the Rushinga area and the Urungwe klippen in northern Zimbabwe, fitting the mega-nappe pattern. Erosional products of the mountain belt are now represented by 700- 400 Ma age detrital zircons present in the various sandstone formations of the Transantarctic Mountains, their correlatives in Australia, as well as the Urfjell Group (western Dronning Maud Land) and probably the Natal Group in South Africa.
URL http://hdl.handle.net/10.1144/SP308.4
Publication Type journal article
Record ID 290792