Phase 1 Heritage Impact Assessment Report
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Exkursionen Excursions
EXKURSIONEN EXCURSIONS 174 MITT.ÖSTERR.MINER.GES. 161 (2015) A GEOLOGICAL EXCURSION TO THE MINING AREAS OF SOUTH AFRICA by Aberra Mogessie, Christoph Hauzenberger, Sara Raic, Philip Schantl, Lukas Belohlavek, Antonio Ciriello, Donia Daghighi, Bernhard Fercher, Katja Goetschl, Hugo Graber, Magdalena Mandl, Veronika Preissegger, Gerald Raab, Felix Rauschenbusch, Theresa Sattler, Simon Schorn, Katica Simic, Michael Wedenig & Sebastian Wiesmair Institute of Earth Sciences, University of Graz, Universitaetsplatz 2, A-8010 Graz Frank Melcher, Walter Prochaska, Heinrich Mali, Heinz Binder, Marco Dietmayer-Kräutler, Franz Christian Friedman, Maximilian Mathias Haas, Ferdinand Jakob Hampl, Gustav Erwin Hanke, Wolfgang Hasenburger, Heidi Maria Kaltenböck, Peter Onuk, Andrea Roswitha Pamsl, Karin Pongratz, Thomas Schifko, Sebastian Emanuel Schilli, Sonja Schwabl, Cornelia Tauchner, Daniela Wallner & Juliane Hentschke Chair of Geology and Economic Geology, Mining University of Leoben, Peter-Tunner-Strasse 5, A-8700 Leoben Christoph Gauert Department of Geology, University of the Free State, South Africa 1. Preface Almost a year ago Aberra Mogessie planned to organize a field excursion for the students of the Institute of Earth Sciences, University of Graz. The choices were Argentina, Ethiopia (where we had organized past excursions) and South Africa. Having discussed the matter with Christoph Hauzenberger concerning geology, logistics etc. we decided to organize a field excursion to the geologically interesting mining areas of South Africa. We contacted Christoph Gauert from the University of Free State, South Africa to help us with the local organization especially to get permission from the different mining companies to visit their mining sites. We had a chance to discuss with him personally during his visit to our institute at the University of Graz in May 2014 and make the first plan. -
South Africa's Coalfields — a 2014 Perspective
International Journal of Coal Geology 132 (2014) 170–254 Contents lists available at ScienceDirect International Journal of Coal Geology journal homepage: www.elsevier.com/locate/ijcoalgeo South Africa's coalfields — A 2014 perspective P. John Hancox a,⁎,AnnetteE.Götzb,c a University of the Witwatersrand, School of Geosciences and Evolutionary Studies Institute, Private Bag 3, 2050 Wits, South Africa b University of Pretoria, Department of Geology, Private Bag X20, Hatfield, 0028 Pretoria, South Africa c Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Republic of Tatarstan, Russian Federation article info abstract Article history: For well over a century and a half coal has played a vital role in South Africa's economy and currently bituminous Received 7 April 2014 coal is the primary energy source for domestic electricity generation, as well as being the feedstock for the Received in revised form 22 June 2014 production of a substantial percentage of the country's liquid fuels. It furthermore provides a considerable source Accepted 22 June 2014 of foreign revenue from exports. Available online 28 June 2014 Based on geographic considerations, and variations in the sedimentation, origin, formation, distribution and quality of the coals, 19 coalfields are generally recognised in South Africa. This paper provides an updated review Keywords: Gondwana coal of their exploration and exploitation histories, general geology, coal seam nomenclature and coal qualities. With- Permian in the various coalfields autocyclic variability is the norm rather than the exception, whereas allocyclic variability Triassic is much less so, and allows for the correlation of genetically related sequences. During the mid-Jurassic break up Coalfield of Gondwana most of the coal-bearing successions were intruded by dolerite. -
Footprint of a Late Carboniferous Ice Sheet D.P
https://doi.org/10.1130/G46590.1 Manuscript received 3 June 2019 Revised manuscript received 31 July 2019 Manuscript accepted 7 August 2019 © 2019 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license. Published online 23 September 2019 Scratching the surface: Footprint of a late Carboniferous ice sheet D.P. Le Heron1, P. Dietrich2,3, M.E. Busfield4, C. Kettler1, S. Bermanschläger1 and B. Grasemann1 1 Department für Geodynamik und Sedimentologie, Althanstraße 14, Universität Wien, 1190 Vienna, Austria 2 Department of Geology, University of Johannesburg, Auckland Park Kingsway Campus, Johannesburg 2092, South Africa 3 Géosciences Rennes, UMR6118, Université de Rennes 1, 263 Avenue du Général Leclerc, Bâtiment 15, Campus de Beaulieu, 35042 Rennes Cedex, France 4 Department of Geography and Earth Sciences, Aberystwyth University, Llandinam Building, Aberystwyth SY23 3DB, UK ABSTRACT records deglaciation punctuated by short-term Field observations in conjunction with aerial images from an unmanned aerial vehicle stillstands and minor readvances (Dietrich and were used to create the first map of a glacial unconformity underlying the late Carboniferous Hofmann, 2019). Such basin-margin locali- Dwyka Group of South Africa. Crosscutting relationships reveal that the glacial unconformity ties record glacially striated pavements of two at Oorlogskloof, in which flutes, grooves, and striae were ploughed into unconsolidated sand, types: (1) hard-bedrock pavements, recording formed in a three-phased process charting a periodic shift in the locus of subglacial erosion. the direct abrasion of LPIA ice sheets onto The unconformity formed by a periodically decoupled ice sheet in a probable tidewater set- hard bedrock material (Du Toit, 1954; Visser ting. -
An Hypothesis for the Origin of Kimberlite 51
Mineral. Soc. Amer. Spec. Pap. 3,51-62 (1970). AN HYPOTHESIS FOR THE ORIGIN OF KIMBERLITE IAN D. MACGREGOR Department of Geology, University of California, Davis, California 95616 ABSTRACT Kimberlites are characteristically associated with a suite of mafic and ultramafic xenoliths whose mineralogy indicates an origin within the upper mantle. The phase chemistry of the xenoliths may be reconciled with known experimental data at high pressures, as suites of crystal cumulates, or residual phases, that have formed during the high-pressure fractional crystallization of a mafic magma. The geological association of kimberlites with specificsuites of xenoliths, and the com- parison with experimental data, give support to this cognate hypothesis previously proposed by a number of other authors. Models of the Earth's thermal history indicate that the upper mantle heated up for the first few billions of years after which time it has slowly cooled to its present state. It is postulated that the kimberlites are formed by the closed system fractional crystallization of mafic magmas which have formed by fractional fusion during the early heating of the upper mantle. During the cooling cycle in the last few billions of years, the mafic liquids have cooled through fractional crystal- lization to the ambient mantle temperatures, and changed composition towards a kimberlite. Sequential primary phase assemblages are represented by harzburgite, garnet harzburgite, garnet lherzolite, hypersthene eclogite, eclogite, kyanite eclogite to an olivine-diopside-perovskite rock. Parallel changes in the liquid composition are through picrite, tholeiite, alkali basalt, a diopside-ilmenite composition to kimberlite. INTRODUCTION logical and geophysical characteristics common to the gen- Although kimberlites occupy only a very small propor- eral description included in the following section. -
The Origin and Early Evolution of Dinosaurs
Biol. Rev. (2010), 85, pp. 55–110. 55 doi:10.1111/j.1469-185X.2009.00094.x The origin and early evolution of dinosaurs Max C. Langer1∗,MartinD.Ezcurra2, Jonathas S. Bittencourt1 and Fernando E. Novas2,3 1Departamento de Biologia, FFCLRP, Universidade de S˜ao Paulo; Av. Bandeirantes 3900, Ribeir˜ao Preto-SP, Brazil 2Laboratorio de Anatomia Comparada y Evoluci´on de los Vertebrados, Museo Argentino de Ciencias Naturales ‘‘Bernardino Rivadavia’’, Avda. Angel Gallardo 470, Cdad. de Buenos Aires, Argentina 3CONICET (Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas); Avda. Rivadavia 1917 - Cdad. de Buenos Aires, Argentina (Received 28 November 2008; revised 09 July 2009; accepted 14 July 2009) ABSTRACT The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks (approximately 230 Ma) accumulated over extensional rift basins in southwestern Pangea. The better known of these are Herrerasaurus ischigualastensis, Pisanosaurus mertii, Eoraptor lunensis,andPanphagia protos from the Ischigualasto Formation, Argentina, and Staurikosaurus pricei and Saturnalia tupiniquim from the Santa Maria Formation, Brazil. No uncontroversial dinosaur body fossils are known from older strata, but the Middle Triassic origin of the lineage may be inferred from both the footprint record and its sister-group relation to Ladinian basal dinosauromorphs. These include the typical Marasuchus lilloensis, more basal forms such as Lagerpeton and Dromomeron, as well as silesaurids: a possibly monophyletic group composed of Mid-Late Triassic forms that may represent immediate sister taxa to dinosaurs. The first phylogenetic definition to fit the current understanding of Dinosauria as a node-based taxon solely composed of mutually exclusive Saurischia and Ornithischia was given as ‘‘all descendants of the most recent common ancestor of birds and Triceratops’’. -
A Phylogenetic Analysis of the Basal Ornithischia (Reptilia, Dinosauria)
A PHYLOGENETIC ANALYSIS OF THE BASAL ORNITHISCHIA (REPTILIA, DINOSAURIA) Marc Richard Spencer A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements of the degree of MASTER OF SCIENCE December 2007 Committee: Margaret M. Yacobucci, Advisor Don C. Steinker Daniel M. Pavuk © 2007 Marc Richard Spencer All Rights Reserved iii ABSTRACT Margaret M. Yacobucci, Advisor The placement of Lesothosaurus diagnosticus and the Heterodontosauridae within the Ornithischia has been problematic. Historically, Lesothosaurus has been regarded as a basal ornithischian dinosaur, the sister taxon to the Genasauria. Recent phylogenetic analyses, however, have placed Lesothosaurus as a more derived ornithischian within the Genasauria. The Fabrosauridae, of which Lesothosaurus was considered a member, has never been phylogenetically corroborated and has been considered a paraphyletic assemblage. Prior to recent phylogenetic analyses, the problematic Heterodontosauridae was placed within the Ornithopoda as the sister taxon to the Euornithopoda. The heterodontosaurids have also been considered as the basal member of the Cerapoda (Ornithopoda + Marginocephalia), the sister taxon to the Marginocephalia, and as the sister taxon to the Genasauria. To reevaluate the placement of these taxa, along with other basal ornithischians and more derived subclades, a phylogenetic analysis of 19 taxonomic units, including two outgroup taxa, was performed. Analysis of 97 characters and their associated character states culled, modified, and/or rescored from published literature based on published descriptions, produced four most parsimonious trees. Consistency and retention indices were calculated and a bootstrap analysis was performed to determine the relative support for the resultant phylogeny. The Ornithischia was recovered with Pisanosaurus as its basalmost member. -
What Lies Beneath Table Mountain Or All Models Are Wrong, but Some Are Useful
WHAT LIES BENEATH TABLE MOUNTAIN OR ALL MODELS ARE WRONG, BUT SOME ARE USEFUL Prof Alexander Kisters August 2016 WHAT LIES BENEATH TABLE MOUNTAIN OR ALL MODELS ARE WRONG, BUT SOME ARE USEFUL Inaugural lecture delivered on 2 August 2016 Prof Alexander Kisters Department of Earth Sciences Faculty of Science Stellenbosch University Editor: SU Language Centre Printing: SUN MeDIA ISBN: 978-0-7972-1614-3 Copyright © 2016 Alexander Kisters BIOGRAPHY rofessor Alexander (Alex) Kisters completed his Pgeology undergraduate studies and MSc at the Aachen University of Technology (RWTH) in Germany and obtained a PhD in geology from the University of the Witwatersrand, Johannesburg. Subsequently, he had worked in the mineral exploration industry in South Africa and had held various postdoctoral and lecturer positions at the universities of Aachen, Cologne and the Witwatersrand before joining Stellenbosch University in 1999. Currently, he is appointed at the Department of Earth Sciences, University of Stellenbosch, as a professor in structural geology and tectonics where he teaches under- and postgraduate courses. He has supervised and cosupervised over 50 honours students, 15 MSc studies and 7 PhD studies. Alex has held a National Research Foundation rating for the past 15 years and a B-rating for the last five years. His research focuses on a range of topics related to crustal deformation aimed at integrating field data with regional tectonic models and more generic processes of melt transport and hydrothermal fluid flow in the Earth’s crust. 1 ABSTRACT he geological evolution of the Western Cape remains elusive after over 100 years of research. Based on regional Tfieldwork and correlations, this contribution aims to develop a tectonic model for the deposition and deformation of rocks of the Malmesbury Group, the rocks that underlie much of the Western Cape. -
A Revision of the Upper Triassic Ornithischian Dinosaur Revueltosaurus, with a Description of a New Species
Heckert, A.B" and Lucas, S.O., eds., 2002, Upper Triassic Stratigraphy and Paleontology. New Mexico Museum of Natural History & Science Bulletin No.2 J. 253 A REVISION OF THE UPPER TRIASSIC ORNITHISCHIAN DINOSAUR REVUELTOSAURUS, WITH A DESCRIPTION OF A NEW SPECIES ANDREW B. HECKERT New Mexico Museum of Natural History, 1801 Mountain Road NW, Albuquerque, NM 87104-1375 Abstract-Ornithischian dinosaur body fossils are extremely rare in Triassic rocks worldwide, and to date the majority of such fossils consist of isolated teeth. Revueltosaurus is the most common Upper Triassic ornithischian dinosaur and is known from Chinle Group strata in New Mexico and Arizona. Historically, all large (>1 cm tall) and many small ornithischian dinosaur teeth from the Chinle have been referred to the type species, Revueltosaurus callenderi Hunt. A careful re-examination of the type and referred material of Revueltosaurus callenderi reveals that: (1) R. callenderi is a valid taxon, in spite of cladistic arguments to the contrary; (2) many teeth previously referred to R. callenderi, particularly from the Placerias quarry, instead represent other, more basal, ornithischians; and (3) teeth from the vicinity of St. Johns, Arizona, and Lamy, New Mexico previously referred to R. callenderi pertain to a new spe cies, named Revueltosaurus hunti here. R. hunti is more derived than R. callenderi and is one of the most derived Triassic ornithischians. However, detailed biostratigraphy indicates that R. hunti is older (Adamanian: latest Carnian) than R. callenderi (Revueltian: early-mid Norian). Both taxa have great potential as index taxa of their respective faunachrons and support existing biochronologies based on other tetrapods, megafossil plants, palynostratigraphy, and lithostratigraphy. -
The Role of Fossils in Interpreting the Development of the Karoo Basin
Palaeon!. afr., 33,41-54 (1997) THE ROLE OF FOSSILS IN INTERPRETING THE DEVELOPMENT OF THE KAROO BASIN by P. J. Hancox· & B. S. Rubidge2 IGeology Department, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa 2Bernard Price Institute for Palaeontological Research, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa ABSTRACT The Permo-Carboniferous to Jurassic aged rocks oft1:J.e main Karoo Basin ofSouth Africa are world renowned for the wealth of synapsid reptile and early dinosaur fossils, which have allowed a ten-fold biostratigraphic subdivision ofthe Karoo Supergroup to be erected. The role offossils in interpreting the development of the Karoo Basin is not, however, restricted to biostratigraphic studies. Recent integrated sedimentological and palaeontological studies have helped in more precisely defming a number of problematical formational contacts within the Karoo Supergroup, as well as enhancing palaeoenvironmental reconstructions, and basin development models. KEYWORDS: Karoo Basin, Biostratigraphy, Palaeoenvironment, Basin Development. INTRODUCTION Invertebrate remains are important as indicators of The main Karoo Basin of South Africa preserves a facies genesis, including water temperature and salinity, retro-arc foreland basin fill (Cole 1992) deposited in as age indicators, and for their biostratigraphic potential. front of the actively rising Cape Fold Belt (CFB) in Fossil fish are relatively rare in the Karoo Supergroup, southwestern Gondwana. It is the deepest and but where present are useful indicators of gross stratigraphically most complete of several depositories palaeoenvironments (e.g. Keyser 1966) and also have of Permo-Carboniferous to Jurassic age in southern biostratigraphic potential (Jubb 1973; Bender et al. Africa and reflects changing depositional environments 1991). -
The Stratigraphy and Structure of the Kommadagga Subgroup and Contiguous Rocks
THE STRATIGRAPHY AND STRUCTURE OF THE KOMMADAGGA SUBGROUP AND CONTIGUOUS ROCKS by ROGER SWART B.Sc . (Hons) Thesis presented in fulfilment of the requirements for the degree of Master of Science in the Department of Geology, Rhodes University ,Grahamstown. January 1982 ABSTRACT The Lake Mentz and Kommadagga Subgroups were deposited i n a marine environment and are characterised by a heterogeneous sequence of sediments, which range in grain size from clays to grits . During the first phase of deposition the Kwee~ vlei Shale and Floriskraal Formations were deposited in a prograding shoreline environment, whereas the succeeding Waaipoort Shale Formation is interpreted as represnting a reworked shoreline. The final phase of deposition of the Cape Supergroup was a regressive one in which the Kommadagga Subgroup wa s fo rmed. The coa rs eni ng upward cycle of thi s subgroup represents a deltaic deposit. A significant time gap appears to exist before the deposition of the glacial-marine Dwyka Tillite Formation. Structurally, the area was subjected to deformation by buckle folding at about 250 Ma into a series of folds with southward dipping axial planes. Only one phase of deformation is recognised in the study area . A decrease in pore space, mineral overgrowths,formation of silica and calcite cements and development of aut~igenic minerals such as opal, stilpnomelane; analcite, prehnite, muscovite and various clay minerals are the characteristic diagenetic features of the sediments.The mineralogical evidence suggests that the maximum temperature -
Ecca Group) of South Africa: a Preliminary Review of Palaeoniscoid Fishes and Taphonomy
Records of the Western Australian Museum Supplement No. 57: 175-181 (1999). The Permian Whitehill Formation (Ecca Group) of South Africa: a preliminary review of palaeoniscoid fishes and taphonomy Fiona J. Evans 1 and Patrick A. Bender2 I Department of Zoology, University of Stellenbosch, Private Bag Xl, Matieland, 7602, South Africa; email: [email protected] 2 Museum of the Council for Geoscience, Private Bag Xl12, Pretoria, 0001, South Africa Abstract - The Permian (Artinskian) Whitehill Formation (Ecca Group) in South Africa and southern Namibia was deposited as part of a large stratified inland sea which extended from the southern margins of South Africa, and southern Namibia, northern Namibia (Aba-Huab Formation, Huab Basin) to the Iratl Formation of the Parana Basin in Brazil and parts of Uruguay. A common biota exists between these two continents, namely mesosaurid reptiles, pygocephalomorph crustacea, wood, palaeoniscoid fish and insects. The Whitehill Formation also contains plant stem fragments, palynomorphs, coprolites, a cephalochordate, rare sponge spicules and traces of arthropods and fish. The good preservation, particularly of the palaeoniscoid material, from the Whitehill Formation contrasts strongly with the disarticulated scales and spines from northern Namibia and Brazil. Recent collections in the Whitehill Formation near Calvinia and Louriesfontein (Northern Cape Province) of South Africa have demonstrated the necessity for a review of the palaeoniscoid taxa present in these units. Possible new species have also been collected, including a deep-bodied form. INTRODUCTION The extensive stratified inland sea in which the Whitehill Formation (Ecca Group, Karoo Supergroup; - - - - - Waterford Fm Figure 1) was deposited had limited or no access to ------------ the ocean according to reconstructions by Oelofsen Fort Brown Fm and Araujo (1987) and Pickford (1995). -
Proposed Limestone Quarry on Portion 1Of East of Gous Kraal No. 257
PALAEONTOLOGICAL IMPACT ASSESSMENT: DESKTOP STUDY Proposed limestone quarry on Portion 1 of East of Gous Kraal No. 257, Cacadu District, Eastern Cape John E. Almond PhD (Cantab.) Natura Viva cc, PO Box 12410 Mill Street, Cape Town 8010, RSA natu [email protected] April 2009 1. SUMMARY The proposed new limestone quarry north of Mount Stuart (Steytlerville area, Eastern Cape) will entail shallow excavations into potentially fossil-bearing mudrocks of the Early Permian (278 Ma) Whitehill Formation. The most important fossils likely to be found here include aquatic mesosaurid reptiles, primitive bony fishes and crustaceans. However, the overall impact of the development on palaeontological resources is likely to be minor since unweathered bedrock is unlikely to be exploited and the planned quarrying activities are both small-scale and short-term. Further specialist palaeontological mitigation is therefore not recommended. Should fossil remains be encountered during excavation, however, the material should be safeguarded and SAHRA or a local museum be contacted for advice by the responsible ECO. 2. INTRODUCTION & BRIEF SA Lime (Eastern Cape) (Pty) Ltd are proposing to quarry limestone for agricultural lime on Portion 1 of the farm East of Gous Kraal No. 257, situated c. 25km northwest of Steyllerville in the Eastern Cape (Ikwezi Magesterial Area, Cacadu District). The new quarry will be located on the west side of the R338 and some 3 km north of the hamlet of Mount Stuart (Fig. 1). It will be in operation for about five months and will only involve an area of 150m X 100m. An existing quarry that has been operated by PPC since 1965 is situated on the opposite side of the R338 road.