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Browsing ETD imports by Issue Date
Now showing items 1-20 of 176
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(University of Pretoria, 1936)No abstract
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(University of Pretoria, 1941)This thesis is based on nearly three years work on the manganese fields of Postmasburg. During this period the writer was able to study in detail every corner of the fields, and make detailed maps of every manganiferous ...
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(University of Pretoria, 1943)
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(University of Pretoria, 1945)
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(University of Pretoria, 1950)No abstract
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(University of Pretoria, 1953)
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(University of Pretoria, 1955)The conclusion is upheld that the two zones of quartzite xenoliths in the area represent detached fragments of the Magaliesberg horizon separated from the floor of the Bushveld Igneous Complex by the intrusion of the latter. ...
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(University of Pretoria, 1956)The geological succession in the northwestern portion of the Orange Free State Gold-fields, as disclosed by twenty-one bore-holes, is described. Special attention is paid to the Rainbow Reefs, occurring in the strata between ...
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(University of Pretoria, 1956)Tin-deposits in the Bushveld granophyre are typically developed on the farm Stavoren 470 in the Potgietersrus District of Transvaal. A study on zircons suggests a similar origin for the Bushveld granite and the Bushveld ...
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(University of Pretoria, 1956)
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(University of Pretoria, 1957)Die doel van die ondersoek was om gegewens in te samel omtrent die dolerietvoorkomste van die Pilanesberg, wat in ·die verlede baie min aandag geniet het. 'n Gebied van vyftig vierkantmyl, in die noordelike Pilanesberg, ...
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(University of Pretoria, 1961)Unweathered specimens of rocks or the Lower Griquatown Stage, as well as of the associated amphibole asbestos, have only become available for investigation during the course of the past ten years. Detailed microscopic, ...
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(University of Pretoria, 1962)During the field-seasons of 1960 and 1961 an area of 60 square miles was mapped in the vicinity of Kennedy's Vale~ District Lydenburge so acquired is presented on the map. The information The Dwars River Fragment, a mass ...
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(University of Pretoria, 1963)No abstract
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(University of Pretoria, 1964)Die horingfels en die kwartsiet van die boonste gedeelte van die Etage Magaliesberg suid van Burgersfort in Oos- Transvaal het baie aandag geniet in hierdie ondersoek. Die gesteentes was veral aan kontakmetamorfose onderworpe ...
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(University of Pretoria, 1964)Resonansieverstrooiing deur die eerste opgewekte toestande van 1 39La, 20 3Tl en 198Hg is met behulp van dietermiese metode bestudeer. In die eerste hoofstuk van hierdie proefskrif is die teorie vir elektromagnetiese ...
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(University of Pretoria, 1965)The subject matter of this treatise is based on observations of the deposits of manganese ore at the mines Hotazel, Devon, Langdon, Smartt, Adams, Mamatwan and Black Rock which are all in the Kalahario This area is referred ...
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(University of Pretoria, 1965)In section A a short description is given of the minerals encountered in 129 polished section3 of conglomerate from the Dominion Reefs Mine. These include: (a) The radio-active ninerals: Thorian uraninite, thorite, monazite, ...
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The transition between the main and the upper zone of the bushveld complex, in the Western Transvaal (University of Pretoria, 1965)The concept which incorporates the term "unit" is suggested for the grouping of the mafic rocks of the Bushveld Igneous Complex. Each unit has definite boundaries. The upper surface of an anorthosite band forms such a ...
Now showing items 1-20 of 176