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Geology: Recent submissions
Now showing items 161-180 of 412
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(University of Pretoria, 2017)Dismembered and low-grade metamorphosed occurrences of mafic extrusive and intrusive and minor ultramafic rocks, grouped as the Arid unit, similar to those of the Arabian Nubian Shield (ANS), are reported here for the ...
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(Springer, 2017-08)The majority of seismic activity in South Africa is related to extensive mining operations, usually in close proximity to densely populated areas where a relatively weak seismic event could cause damage. Despite a significant ...
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(Japan Association of Mineralogical Sciences , 2012-01)Native osmium from two different placer occurrences (i.e., Ingaringda and Burlakovsky) within the Guli Massif, Maimecha-Kotui Province, was evaluated for mineral compositions that show systematic differences between ...
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(Springer, 2017-10)The problem considered in this study is that of unrealistic ground motion estimates, which arise in the Cornell–McGuire method when the seismic hazard curve is calculated for extremely low annual probabilities of exceedance. ...
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(Springer, 2017-08)The paper presents a new method for empirical assessment of tsunami recurrence parameters, namely the mean tsunami activity rate λT, the Soloviev–Imamura frequency–magnitude power law bT-value, and the coastline-characteristic, ...
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(Elsevier, 2017-08)Faults and other structural features within the mafic-ultramafic layers of the Bushveld Complex have been a major issue mainly for exploration and mine planning. This study employed a new approach in detecting faults with ...
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(Geological Society of South Africa, 2016)We analyzed the changes/improvements of seismic event detection and location accuracy of the South African National Seismograph Network over the last four decades. The effect of three regional velocity models on epicentral ...
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(University of Pretoria, 1987)The stratigraphy , sedimentology and geochemistry of. the upper Transvaal Sequence rocks in the northern portion of the Rooiberg Fragment are researched. The Leeuwpoort Formation of the Pretoria Group was deposited in ...
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(University of Pretoria, 1968)During the refining of steel by basic processes, a multitude of mineralogical reactions take place in the refractories with which the furnace is lined. The reactions are caused by an influx of material from the slag and ...
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(University of Pretoria, 1989)From available records and data of colliery product samples, an area within the Witbank and Highveld coalfields was selected for this study. The petrographic and elemental nature of the coal seams have been derived from ...
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(University of Pretoria, 1984)Low-grade tin deposits occur within the apex of the Bobbejaankop Granite intrusion at the Zaaiplaats Tin Mine. The finegrained hood-facies of the Bobbejaankop Granite, called the Lease Granite, seems to be intrusive ...
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(University of Pretoria, 1983)A mineralogical and geochemical investigation of the country rock around pipe-like ore bodies in the Lease Granite was undertaken to obtain a better understanding of the conditions of formation of the pipes. It was also ...
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(University of Pretoria, 1982)Pocket mineralisation is the name applied to podlike bodies of coarse-grained rock which are the result of alteration of sediments. In some areas pockets are cassiterite bearing, and these pockets have been mined at ...
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(University of Pretoria, 2016)Mount Cameroon is considered the only active volcano along a 1600 km long chain of volcanic complexes called the Cameroon Volcanic Line (CVL). It has erupted seven times during the last 100 years, the most recent was in ...
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(University of Pretoria, 2015)Traditional float and sink analyses are undertaken to determine the washability of coal. Float and sink analyses are costly, require toxic heavy organic liquids and the procedure to wash and dry the float and discard ...
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(University of Pretoria, 2016)Marion Island is a sub-Antarctic island which lies 300 km south of the South West Indian Ridge. The island is extensively affected by two periods of volcanism with the oldest erupting during the Pleistocene and the younger ...
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(Springer, 2016-12)Lateritic soils which have been described as highly weathered tropical or subtropical residual soils were studied with an attempt to establish its suitability or otherwise as sustainable material in building bricks and ...
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(Acoustical Society of America, 2017-03)Two traditional cosmetic clays bear similar names in different local South African languages: vumba (Tshivenda) and ubumba (isiZulu). The wet clays are applied topically for cosmetic purposes by the respective indigenous ...
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(Seismological Society of America, 2012-06)The Aki (1965) maximum likelihood estimate of the Gutenberg–Richter b-value is extended for use in the case of multiple catalogs with different levels of completeness. The most striking feature of this newly derived ...
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(Elsevier, 2016-12)The impacts associated with unconventional oil and gas (UOG) extraction will be cumulative in nature and will most likely occur on a regional scale, highlighting the importance of using strategic decision-making and management ...
Now showing items 161-180 of 412