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  • IOM3
    Bohmke reef: platinum-group element mineralization associated with C1d chromitite of the Great Dyke, Zimbabwe

    By S. J. Parry, D. M. Evans, D. L. Buchanan

    The reef is a PGE-enriched sulphidic zone, stratigraphically associated with and overlapping the C1d chromitite layer, that was formed by magmatic processes at the 1e-1d subunit boundary. Two distinct

    Apr 1, 1996

  • IOM3
    Electrochemical removal of lead from aluminium using fused salts

    By F. Tailoka, G. Zhao

    Pb is an unwanted impurity in Al for which there is no established method of removal. As it interacts strongly with alkali metals, separation was achieved by adding Na or K to molten Al at 953-1 003 K

    Apr 1, 1995

  • IOM3
    Preliminary modelling of groundwater inflows at Gays River mine, Nova Scotia, Canada

    By R. Macleod, G. G. Bursey, T. R. C. Aston, J. E. Gale

    In 1991 the problems of water inflow at the mine were addressed by a three-phase study. A three-dimensional finite-element computer code, CFEST (Coupled Fluid, Energy and Solute Transport), was used t

    Jan 12, 1993

  • IOM3
    Extraction of rare earths and thorium from monazite by chlorination with carbon tetrachloride

    By G. Adachi, K. Machida, T. Ozaki, K. Murase

    The chlorination rate with CCl4 was unexpectedly slower than carbochlorination using chlorine under the same reaction conditions. Chlorination with CCl4 was topochemical and the amount of monazite rea

    Jun 18, 1905

  • IOM3
    Removal of copper from magnetite concentrates by chlorination

    Two concentrates from Palabora, in South Africa, containing 0.056-0.068% undesirable Cu and 0.8 or 2.2% Ti, were chlorinated with air:chlorine ratios of 10:1, 15:1 and 20:1 at temperatures between 1 2

    Jun 21, 1905

  • IOM3
    The suppression of dust in coal-mines of Great Britain -thirty-second report to the committee on the control of atmospheric conditions and spontaneous combustion in mines-

    By J. Ivon Graham, T. D. Jones

    This paper presents methods in use in British coal-mines for the suppression of dust. While the effect of present-day treatment will not be apparent for several years, in pits in South Wales, concentr

    Jan 1, 1947

  • IOM3
    New generalised model of observed ore value distributions

    By H. S. Sichel, W. J. Kleingeld, C. E. Dohm

    A model of ore value distributions is presented that is the culmination of a statistical approach rather than simply a model that has been successfully applied to the evaluation of ore reserves. Detai

    Aug 1, 1995

  • IOM3
    Effect of charge moistening on alkali roasting of chromium oxide

    By A. K. Tripathy, P. K. Pattnayak, H. S. Ray

    The effects of water addition on the solid-state reaction between Cr2O3 and Na2CO3 at low temperatures (up to 873 K) were investigated to determine its possible influence on the reaction rate and the

    Jun 19, 1905

  • IOM3
    Automated gold search and applications in process mineralogy

    By L. J. Cabri, J. M. D. Wilson, R Lastra

    An image analysis program can search for gold minerals in polished sections by scanning about 100 x 100 back-scattered electron images at a magnification of x400, allowing gold grains as small as 1 mi

    Jun 21, 1905

  • IOM3
    Origin of brine inflows at Boulby potash mine, Cleveland, England

    By M. A. Leosson, S. H. Bottrell, R. J. Newton

    Sylvite at Boulby is mined 1 140 m beneath the sea and the mine suffers from the influx of water. This is of two kinds: persistent flows originating in the Sherwood Sandstone aquifer and entering the

    Jun 18, 1905

  • IOM3
    Potential for epithermal gold mineralization in east and central Sutherland, Scotland: indications from River Brora headwaters

    By J. Crummy, I. K. Anderson, A. J. Hall, R. S. Haszeldine

    Bedrock gold mineralisation has been located in association with an extensive float train 25 km west of known alluvial gold. It is in the form of open, matrix-supported breccias comprising pyritic qua

    Jun 19, 1905

  • IOM3
    Analaysis and management of financial risks arising from ground conditions

    By I. L. Whyte

    apparent density and drag coefficient of porous ores on

    Apr 1, 1995

  • IOM3
    Extraction of yttrium from a Brazilian xenotime concentrate by sulphation and water-leaching

    By T. Ogasawara, J. P. Barbosa, A. J. Monhemius, F. T. Da Silvia

    A thermodynamic analysis of the sulphation of rare-earth phosphates and the water-leaching of rare-earth sulphates was used to guide experimental work on the sulphation and leaching of concentrates fr

    Jun 19, 1905

  • IOM3
    Freeze-sampling method of collecting drainage sediments for gold exploration

    By J. S. Coats, G. E. Patts, N. Hughes

    Conventional sampling methods are known to suffer from the variable loss of fine gold by elutriation. Freeze sampling yields representative and quantitative data that, when combined with information o

    Jan 1, 1991

  • IOM3
    Design methods for controlled blasting

    By O. Dojcar

    Equations for calculating the parameters of controlled blasting (burden and spacing of boreholes and weight of the bottom charge) are derived and analysed on the basis of empirical values and made mor

    Dec 1, 1996

  • IOM3
    Residual coal mining subsidence - some facts

    By C R. Ferrari

    Residual subsidence is generally accepted as being about 5% of the total subsidence occurring within 12 months of all mining finishing. This paper looks at five case studies from different parts of th

    Jan 7, 1997

  • IOM3
    Thermodynamics of oxygen in liquid copper, lead and copper-lead alloys

    By J. H. E. Jeffes, K. T. Jacob

    Solid oxide galvanic cells, of the type: Pt,Ni-NiO | Solid electrolyte | O(metal),Cermet,Pt, were used to measure the activity coefficient of oxygen in liquid Cu at 1 100 and 1 300°C and in Pb at 1 10

    Dec 1, 1971

  • IOM3
    Risk management for mining projects

    By T Atkinson, A Cobb, R AJIington

    Risk management is concerned with the whole spectrum of financial, geological, engineering, legal, governmental, social and occasionally ethnic issues, concerned with mining projects. The inherent ris

    Jan 5, 1996

  • IOM3
    Application of physical modelling and particle flow analysis to evaluate ore-pass design

    By M. J. Beus, B. Stewart, S. Iverson

    Ore-pass hazards are a significant safety problem in US underground metal mines. From 1975 to 1995, nearly 75% of injuries during pulling or freeing of ore-pass chutes were related to falls of broken

    Jun 19, 1905

  • IOM3
    Bioleaching of iron-stained sands

    By A. F. Neil, A. S. Bahaj, P. Watkins, P. M. Hyslop, C. E. Kirby, P. A. B. James

    The results of initial work indicate that for 3 of the 5 quarry sands bioleaching reduces the iron oxide content to a commercially acceptable 0.035 wt% Fe20 3, although the time taken to achieve this

    Jun 18, 1905