Ore Geology and Industrial Minerals: An IntroductionMuch new data and many new ideas have emerged in the area of ore geology and industrial minerals since publication of the second edition of this text in 1987. The overriding philosophy behind this new edition is the inclusion and integration of this new material within the established framework of the text. The third edition is re-presented in the modern double-column format. Non-metallic deposits of industrial and bulk materials are fully covered to meet the changing emphasis of courses in applied geology. In addition, chapter 1 has been considerably enlarged to include a section on mineral economics covering metals, industrial minerals and bulk materials. In this section, the various aspects of economic exploitation of industrial and bulk materials are compared with those of metallic deposits. Other major revisions and additions include a section on fluid inclusions, expansion of the section on wall rock alteration, expansion of the material on isotope studies, and the inclusion of a section on hydraulic fracturing and seismic pumping. |
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Page 5
... concentration of metals has occurred that may by further natural processes be upgraded to the level of ore. The relative importance of ore and industrial minerals There has always been an aura of romance about metallic deposits ...
... concentration of metals has occurred that may by further natural processes be upgraded to the level of ore. The relative importance of ore and industrial minerals There has always been an aura of romance about metallic deposits ...
Page 16
... concentration of a metal in an orebody is called its grade, usually expressed as a percentage or in parts per million (ppm). The process of determining these concentrations is called assaying. Various economic and sometimes political. 16 ...
... concentration of a metal in an orebody is called its grade, usually expressed as a percentage or in parts per million (ppm). The process of determining these concentrations is called assaying. Various economic and sometimes political. 16 ...
Page 17
An Introduction Anthony M. Evans. these concentrations is called assaying. Various economic and sometimes political considerations will determine the lowest grade of ore that can be produced from an orebody; this is termed the cut-off ...
An Introduction Anthony M. Evans. these concentrations is called assaying. Various economic and sometimes political considerations will determine the lowest grade of ore that can be produced from an orebody; this is termed the cut-off ...
Page 24
... concentration (the mineralogical limit) is reached, below which an element no longer forms a distinct physically recoverable mineral phase. 2 / The nature and morphology of the principal types. increasing degree of geological assurance ...
... concentration (the mineralogical limit) is reached, below which an element no longer forms a distinct physically recoverable mineral phase. 2 / The nature and morphology of the principal types. increasing degree of geological assurance ...
Page 25
... Concentration factors Average Average minimum crustal exploitable Concentration abundance (%) grade (%) factor Aluminium 8 30 3.75 Iron 5 25 5 Copper 0.005 0.4 80 Nickel 0.007 0.5 71 Zinc 0.007 4 571 Manganese 0.09 35 389 Tin 0.0002 0.5 ...
... Concentration factors Average Average minimum crustal exploitable Concentration abundance (%) grade (%) factor Aluminium 8 30 3.75 Iron 5 25 5 Copper 0.005 0.4 80 Nickel 0.007 0.5 71 Zinc 0.007 4 571 Manganese 0.09 35 389 Tin 0.0002 0.5 ...
Contents
Part 2 Examples of the more important types of ore deposit | 97 |
Appendix Formulae of some minerals mentioned in the text | 345 |
References | 347 |
Index | 379 |
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Common terms and phrases
Archaean associated Australia baryte basalts base metal basins bauxites belts breccia carbonate carbonatite chalcopyrite Chapter chlorite chromite classification clay Complex concentration contain continental country rocks crust crystallization deposit type deposits occur diamonds dolomite economic environment epigenetic evaporites example facies faults field first flow fluid inclusions fractures genesis geological gold grade grains granites graphite host rocks hydrothermal hydrothermal solutions igneous important industrial minerals intrusions iron formation isotopic kimberlites komatiitic lamproites layers lead limestone magma magnetite manganese mantle massive sulphide deposits metamorphic mining Modified molybdenum nickel oceanic orebodies oxide pegmatites peridotite Phanerozoic placers plutonic porphyry copper deposits Precambrian present produced Proterozoic pyrite pyrrhotite quartz regional rifting sea water sedimentary sediments sericite shales significant silicate skarn sphalerite stockwork stratiform suggested sulphide sulphur tectonic temperature thick tion uranium USSR veins volcanic wall rock alteration Western zone