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Geochemical exploration for gold in tropical soils: four contrasting case studies from West Africa
By E. O. Afreh, R. J. Bowell, E. Hanssen, D. Pohl, S. Abe, R. K. Yao, N. d'A. Laffoley
In the largely preserved laterite profiles at Syama mine, in the savanna region of southern Mali, element geochemistry in the mottled-clay horizon and below can be related directly back to the protoli
Apr 1, 1996
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New possibilities for magnetohydrostatic separation of particles
By Bakker J. de, P. A. Leest, W. L. Dalmijn, H. J. Glass
The test facility at the Delft University of Technology, in the Netherlands, was characterised. Advantages include the possibility of separating particles with high but different densities up to 9 g/c
Jun 18, 1905
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Geology and stable isotope study of Arthrath mafic intrusion and Ni-Cu mineralization, northeast Scotland
By R. L. F. Kay, T. A. Fletcher, A. J. Boyce, C. M. Rice
Paper presented at Mineralisation in the Caledonides, the Mike Gallagher memorial meeting held in Edinburgh, 27-28 June 1996. The synorogenic, mafic Ordovician intrusion comprises orthopyroxene-rich x
Jun 19, 1905
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A review of diesed emission monitoring and control technology
By I S. Lowndes, K. Moloney
Diesel powered equipment is currently used extensively in mining and tunnelling operations around the world due to its mobility, flexibility and through selective application to enhance productivity.
Jan 10, 1996
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Underground void visualization and volume calculation by a low-cost, laser-based surveying technique
By K. D. Russ, A. J. Beer
Non-contact systems for measuring underground voids have used theodolites, reflective or non-reflective laser methods and sonar techniques. An effective but cheaper alternative is based on use of a Wi
Jun 21, 1905
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Prediction of mine tailings delta profiles
By P. H. Morris
The profile of a delta formed by fine-grained mineral processing wastes, disposed of as aqueous slurries by subaerial deposition from a pipeline, has a significant bearing on the volume that is availa
Apr 1, 1996
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Mathematical model of the dense-medium drum
By P. J. Baguley
The model has been developed on the basis of the observation that the partitioning behaviour of a particle is related to its calculated terminal velocity. It utilises a theoretical calculation of the
Jun 18, 1905
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Exploration and origin of stratigraphically controlled platinium-group element mineralization in crustal sequence ultramafics, Shetland ophiolite complex
By R. A. Lord, H. M. Prichard
Paper presented at Mineralisation in the Caledonides, the Mike Gallagher memorial meeting held in Edinburgh, 27-28 June 1996. The complex exemplifies a class of olivine-rich, platiniferous ophiolite c
Jun 19, 1905
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Strata-bound pyritic copper mineralization on a fore-arc setting in northwestern India: a Proterozoic Besshi-type deposit
By A. D. Mukherjee, H. N. Bhattacharya
Middle Proterozoic sulphide ore mineralisation occurs in isolated blocks of the NE-SW trending Delhi fold belt composed of Delhi Supergroup rocks. The Ajari-Basantgarh-Pipela belt forms part of the lo
Jun 19, 1905
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In-situ ground stress measurements and their effect on the design of Pergau hydroelectric project, Malaysia
By R. Patel, D. R. Taylor, P. M. Varley
In-situ measurements of ground stress were made from surface boreholes, using overcoring and hydrofracturing techniques, to obtain data for the detailed design of the underground works at Pergau. Unex
Jun 19, 1905
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Landform replication in quarrying
By R. Allington, G. Walton
The approach has been applied with success to the restoration of chalk workings in southern England, and research and trials relating to restoration blasting and the replication of limestone dale land
Aug 1, 1994
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Development of platinum-group minerals in laterites - initial comparison of organic and inorganic controls
By A. P. Gize, J. F. W. Bowles, D. J. Vaughan, S. J. Norris
Paper presented at the IAGOD international symposium on mineralization related to mafic and ultramafic rocks held in Orleans, France, 1-3 September 1993. Geological evidence from tropical laterites in
Apr 1, 1994
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Vapour pressure-temperature relation for sulphur up to the critical point
By E. H. Baker
Vapour pressures of sulphur have been measured over the temperature range 340-1039°C by means of boiling-point measurements, an internally heated pressure vessel being employed with argon as the press
Dec 1, 1971
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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
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Highwall mining: practical estimates of coal-seam strength and the design of slender pillars
To maximise recovery by highwall mining, pillars must be designed which are long, slender and of relatively low width-to-height ratios. The strength of pillars with width/height less than 2 depends pr
Jun 21, 1905
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Geology and genesis of Lago volcaniclastic-hosted Zn-Pb deposit, northwest Spain
By L. Villa, O. Suarez, D. Arias, L. G. Corretge
The deposit comprises two vertical, lenticular bodies emplaced in the allochthonous block of a Variscan thrust. Epigenetic mineralisation occurs as replacement of carbonated volcaniclastic rocks of Ca
Jun 19, 1905
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Kinetics of reduction of metal values from fayalite-based slags - part 2: modelling of idealized slag-cleaning conditions
By B. S. Terry, C. L. Harris
Reduction kinetics from slags containing CuO(0.5), ZnO, PbO, NiO and SnO into a Cu-based metal phase were subjected to computer simulation using a previously developed model for the kinetics of metal-
Aug 1, 1995
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Processes for reducing zinc from slags using on iron-carbon melt
The reduction of zinc from slags by a molten, carbon-saturated bath was examined in a laboratory study under conditions of continuous slag feeding. The results show that it is possible to reduce the b
Jul 1, 1991
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An energy-based approach to blast design
By D. W. Taylor, I. W. Farmer, N. Mojtabai
Rittinger's and Bond's descriptions of rock crushing relate the energy input required to fracture rock and the surface energy required to form new fractures to the change in specific surface area of f
Jun 19, 1905
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Alluvial gold dredging: a case study of effects on groundwater turbidity
By H. R. Thorpe
A floating gold dredge operating in coarse alluvial gravels of the Grey River on the west coast of the South Island, New Zealand, generated high concentrations of clay and colloidal particles in the d
Jun 19, 1905