The west rand and west wits line goldfields, located on the northern rim of the witwatersrand basin about 40 and 60 km southwest of johannesburg, are concealed by younger overlying strata. Wits theses and dissertations are deposited in fulltext onto wiredspace and are accessible around the world. Neoarchaean tectonic history of the witwatersrand basin. The stratigraphy of the witwatersrand sequence in the delmas area, transvaal. Abstract the mesoarchaean witwatersrand basin represents the largest known gold anomaly and has produced more gold than any other ore province in the world. Gold is found in the conglomerate strata of the younger members of the supergroup, locally referred to as banket.
Net web sites or windows forms applications, to add pdf merge capabilities to your application. From the start, it embraced a philosophy of nondiscrimination on the basis of race, which led to intense. Application of 3d seismic techniques to evaluate ore. Sorne ocelli appear to merge, and discrete light weathering layers may be the ultimate endstage of this coalescence.
Evidence for the primary character of spheroids and the autochthonous crystallization of pyrite under endogenic conditions is furnished. The first case study deals with recovering gold reef from surface rock dumps srd at kloof gold mine. In the present communication, we have attempted to develop and scrutinize this concept based on the study of. Life cycle assessment on a food manufacturing facility, south.
Environmental analysis of plastic environmental analysis of plastic production processes. A revised stratigraphic framework for the witwatersrand. Vrmlmerge convert vrml to x3d, merge vrml 97 files, wrl. The gold mines in this area are possibly the deepest mines in the world mining operations at 3600 m and exploration coredrilling up to 4600m. Unesco eolss sample chapters geology iv gold deposits herrington r.
Except on the scale of hand samples, there are no occurrences of gold only, or of uraninite only. Department of geology, university of the witwatersrand, private bag 3, wits 2050, south africa received 19 december 1994. The intellectual property in theses and dissertations belongs to wits, so in the event of students wanting to publish their thesesdissertations or being approached by publishers to publish their thesesdissertations, students would need to obtain permission from wits legal office or. New data on hydrocarbons in auriferous conglomerates of. Witwatersrand system article about witwatersrand system by. Task group for the witwatersrand supergroup, council for geoscience south africa editor. Here are the steps on how to merge, combine or join pdf files. The association of gold with carbonaceous rocks is interpreted in. The problem of the origin of the witwatersrand golduranium deposit is considered. The witwatersrand supergroup which for over a century was the largest goldproducing geological province has also reached maturity with gold production having declined by 77%. Introduction to mergers and acquisitions 3 acquisitions and takeovers an acquisition, according to krishnamurti and vishwanath 2008 is the purchase of by one company the acquirer of a substantial part of the assets or the securities of another target company. Based in johannesburg, it was responsible for the security of the region, forming the primary level of command for military operations in support of.
The witwatersrand locally the rand or, less commonly, the reef is a 56kilometrelong 35 mi, northfacing scarp in south africa. Imwaru industrial and mining water research unit food lca of starch and other product production at tongaat hullet starch monthly results over 3 year period. The witwatersrand plateau consists of a 5 000to7 000metrethick 3. Home whsl witwatersrand health sciences library libguides. Witwatersrand system article about witwatersrand system. Thus the northern slopes have a thick reddish topsoil, the result of the decomposition of the mineralrich granodiorite basement, while the ridges and southern part of the. Study at wits wits offers undergraduate degrees and postgraduate degrees and diplomas, as well as a range of short courses and parttime and online offerings. Neoarchaean tectonic history of the witwatersrand basin and. Geological setting university of the witwatersrand.
Specify an already instantiated and populated array of string containing the names of the pdf files that you want to merge together. Witwatersrand deposits appear to fit a placer mechanism because the calculated gold content of inferred source rocks 0. Click add a pdf file to add pdf files that you wish to merge into a new pdf file. Durrheim4 abstract as expensive as 3d seismic reflection surveys are, their high. Life cycle assessment comparison of petoleumbased polypropylene and. Pdf evaluating the structural character and tectonic. Deposition of the predominantly siliciclastic basin fill began shortly after 2985 ma in a shallow marine environment. The witwatersrand basin is approximatly 350 km long and 200 km wide. It stretches for 350 km long by 200 km wide with a thickness that can exceed. The minimum age for the witwatersrand basin fill, lithostratigraphically described as the witwatersrand supergroup, is determined by a 2714 8 ma date for basaltic lavas in the lower part of the overlying ventersdorp supergroup armstrong et al. Often there are multiple dwf files that must be viewed. The abundance of this gold is without equal anywhere else in the world. What are some of the reasons i may not be able to log in.
Already, it is decanting or leaking into our ground water and many people have been seriously affected by this. Some farms have been so badly affected that they are no longer operative. Application of 3d seismic techniques to evaluate ore resources in the west wits line goldfield and portions of the west rand goldfield, south africa musa s. New data on hydrocarbons in auriferous conglomerates of the. Gold grade in the witwatersrand goldfields decreased by 49% over a period of 30 years mu ller and frimmel 2010.
Placing youth, subcultures and gang formation within the wider social, political, economic and historical context is of equal. The witwatersrand basin formed over a period of 360 ma between 3074 and 2714 ma. Witwatersrand sedimentation was followed by eruption of approximately 3 km of lava 2710 ma11 and coeval deposition of localised, but sometimes thick, sedimentary units consisting chiefly of quartzite, siltstone and shale. A revised stratigraphic framework for the witwatersrand supergroup issue 42 of lithostratigraphic series. Apply here for an undergraduate degree or a postgraduate degree or diploma. Net you can combine existing pdf documents, images and texts in a single pdf document. Possible liquid immiscibility textures in highmagnesia. From the inception of mining to 2002, the wwr has produced a total of49,332metrictonnes tauatanaveragerecovery gradeof. Is it possible to combine multiple dwfs using windows. It consists of a hard, erosionresistant quartzite metamorphic rock, over which several northflowing rivers form waterfalls, which account for the name witwatersrand, meaning ridge of white waters in afrikaans. The witwatersrand deposit and the problem of the ore. Oct 16, 2017 john kaiser, founder of kaiser research online, overviews the gold market, novo resources and the potential for the pilbara to become witwatersrand 2.
University of the witwatersrand, 1970 geology 20 pages. Encyclopedia of life support systems eolss coal measures up to 2. With the new constitution of 1994, it was divided into eastern transvaal now mpumalanga, northern transvaal now limpopo, pretoriawitwatersrandveereeniging now gauteng, and part of north west prov. Average values for gold on the earth various sources. The lowermost succession of javas in the proterozoic ventersdorp supergroup contains jight weathering. Commonly known as wits, the university of the witwatersrand developed out of the south african school of mines, set up in kimberley in 1896. Allow grease to cool before attempting to move pan. General stratigraphy of the transvaal supergroup and the bushveld complex the bushveld complex comprises the voluminous, bimodal intrusive magmas of mafic and felsic characteristics into predating transvaal supergroup sediments and rooiberg group volcanics. In the witwatersrand, the dolomite is being eaten away by this water, which is in the basins or void, under the witwatersrand ridge. The witwatersrand is a large basin of metamorphosed conglomerates that forms the greatest goldfield in the world.
The association of gold with carbonaceous rocks is. The institution moved to johannesburg in 1904 and acquired full university status in 1922. The order of the files specified in the array are the order in which the files are merged. The witwatersrand supergroup consists of the west rand and central rand groups. Rockwater and crescent merge to create leading water. Rocks of the ventersdorp supergroup are, in turn, overlain by rocks of the 2. On this page you can find the vrmlmerge program and a couple of vrml97 visualizations including some big ones which can be run and viewed online. Vrmlmerge convert vrml to x3d, merge vrml 97 files, wrl examples. Thermal properties of stratified rocks from witwatersrand. Pulses of sedimentation within the sequence and its precursors were episodic, occurring between 30863074 ma dominion group, 29702914 ma west rand group and 28942714 ma central rand group. Over 50000 tonnes 55000short tons have been mined from these rocks since this precious metal was first discovered here in 1886.
Whsl has incorporated the dental library collection since the faculties of medicine and dentistry merged to become the faculty of health sciences. With the new constitution of 1994, it was divided into eastern transvaal now mpumalanga, northern transvaal now limpopo, pretoriawitwatersrandveereeniging now gauteng, and part of north west pro. University of the witwatersrand world university rankings the. Use the mergepdfs method to merge the specified pdf files into a single output file. The fluvial and explosion hydrothermal origin of pyrite spheroids and aubearing pseudoconglomerate is denied.
The lower or w est rand group mainly comprises iron rich shale and quartzites, while the gold bearing conglomerates occur almost exclusively in the dominantly arenaceous. Apr 01, 2020 the witwatersrand health sciences library whsl was established in 1923 as the witwatersrand medical library, to support the medical practitioners on the witwatersrand. We have an application that allows users access to view dwf files. The stratigraphy of the witwatersrand sequence in the. Apr 20, 2017 gold and uranium concentration by interaction of immiscible fluids hydrothermal and hydrocarbon in the carbon leader reef, witwatersrand supergroup, south africa. Socioeconomic and political conditions on the witwatersrand, 19301960 introduction as discussed in the preceding chapter, the conceptual boundaries used by scholars to understand subcultures need to be broadened. Merge the list of source documents, saving the result in the destination file. Is there a way to evoke a local system process that will combine dwf file. This predominantly volcanic sequence comprises the ventersdorp supergroup, which is subdivided into three groups figure 2. The melville koppies nature reserve lies astride the geological unconformity the place where the sediments of the witwatersrand supergroup lie upon the basement rocks.
The witwatersrand command was a command of the south african army. Most of the gold in the witwatersrand is present as native gold which occures in a variety of formes and habits, such as microscopic veinlets or overgowths and is usually only visible under the microscope the average gold particle ranges from 0. Over a period from 2003 to 2010 various test work campaigns and pilot plant work was carried out proving both the technical and economic viability of optical sorting. Based on geological and mineralogicalgeochemical investigations, we previously proposed a sedimentaryexhalative hypothesis for its origin. The witwatersrand supergroup overlies the dominion group ca. If you are asked to access the file using a programme that you do not have it is best to discuss. Witwatersrand definition and meaning collins english dictionary. The witwatersrand health sciences library whsl was established in 1923 as the witwatersrand medical library, to support the medical practitioners on the witwatersrand. We briefly cover the popular nomenclature of the fractures and focus on the genesis of a set of flatdipping fractures that pose roof stability problems in many stopes.
Vrmlmerge is a usefull tool for vrml and x3d more on this in the vrmlmerge section. Upb detrital zircon shrimp, and is made up of coarse clastic rocks and bimodal volcanic rocks. Rockwater and crescent merge to create leading water management services company author. Gold and uranium concentration by interaction of immiscible fluids hydrothermal and hydrocarbon in the carbon leader reef, witwatersrand supergroup, south africa. The witwatersrand basin and its gold deposits springerlink. Abstract the witwatersrand basin formed over a period of 360 ma between 3074 and 2714 ma. The entire series of rocks, known as the witwatersrand supergroup, consists of very hard erosion resistant quartzites, banded ironstones and some marine lava deposits. It is recommended that all files on witse subscribe to common file formats such as pdf, docx, xlsx and rtf. Study at wits wits university university of the witwatersrand. Genesis of deposits in the worlds largest witwatersrand auriferous region south africa remains a debatable issue over several decades. Witwatersrand definition and meaning collins english. The witwatersrand supergroup consists of the west rand and central rand groups fig.
Witwatersrand basin ventersdorp supergroup seismics structure tectonics firstorder scale structures in the west wits line and west rand gold. Each files name, total pages and location are displayed. I read as like merge the list of source documents, saving the. It was one of the ten regional commands, which, with the walvis bay military area, made up the territorial force. Chapter two socioeconomic and political conditions on the. Evaluating the structural character and tectonic history of the witwatersrand basin article pdf available in precambrian research 1771. While there is no guarantee that the purdys reward will be of a similar scale or even type of deposit as that, just the comparison is enough to get the gold bugs biting very hard indeed. Witwatersrand definition, a rocky ridge in s africa, in the republic of south africa, near johannesburg. Gold deposits encyclopedia of life support systems. Witwatersrand supergroup wits and note similarities to some fractures in the bushveld complex platinum mines.
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