An Introduction to Economic Geology and Its Environmental ImpactAs it has grown in length and level through successive edtions, the same author's Introduction to Ore Geology (now Ore Geology and Industrial Minerals) has left behind its original audience: first- and second -ear students. This new textbook, designed to fill that niche , was written specifically for introductory courses. Introduction to Economic Geology and Its Environmental Impact covers oil, coal, water and nuclear fuels, as well as economically important ores and bulk minerals. In keeping with current concerns and constraints, particular attention is paid to the impact of mining and drilling on the environment |
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Page 20
... 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 ...
... 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 ...
Page 23
... . A shaft pillar is also left unmined. (After Barnes, 1988, Ures and Minerals, Open University Press, with permission.) Table 2.3 Concentration factors. abundance I%) grade 1%) factor Aluminium. MINERAL ECONOMICS /23.
... . A shaft pillar is also left unmined. (After Barnes, 1988, Ures and Minerals, Open University Press, with permission.) Table 2.3 Concentration factors. abundance I%) grade 1%) factor Aluminium. MINERAL ECONOMICS /23.
Page 25
... Concentration Fig. 8.32:: Map showing the locations of the places mentioned. Table 2.3 Concentration factors. abundance I%) grade 1%) 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 ...
... Concentration Fig. 8.32:: Map showing the locations of the places mentioned. Table 2.3 Concentration factors. abundance I%) grade 1%) 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 ...
Page 33
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Page 34
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Contents
1 | |
Part 2 Examples of the More Important Types of Ore Deposit | 83 |
Part 3 Mineralization in Time and Space | 319 |
Index | 353 |
Other editions - View all
An Introduction to Economic Geology and Its Environmental Impact Anthony M. Evans No preview available - 2009 |
An Introduction to Economic Geology and Its Environmental Impact Anthony M. Evans No preview available - 1997 |
Common terms and phrases
acid aquifers Archaean areas associated Australia banded iron formation baryte basins beds Bushveld Complex carbonate carbonatite chalcopyrite chemical chromite clay coal Complex concentration contain continental country rocks crust crystals deposit type deposits occur dolomite economic environment evaporites example exploitation facies faults fields first fluid fracturing Geology geothermal gold grade grains granites ground water heavy minerals host rocks hydrothermal igneous important industrial minerals intrusions iron formation isotopic kimberlite komatiitic lamproites layers lead limestone magma magnetite manganese massive sulphide deposits material metamorphic mining molybdenum nickel oceanic orebodies oxide pegmatites peridotite Phanerozoic phosphate plutonic porphyry copper deposits Precambrian precipitation present processes production Proterozoic pyrite quartz region reserves sand sandstone Section sedimentary sediments shale significant silicate skarn stockwork stratiform sulphide sulphur surface temperature thick tion tonnage ultrabasic uranium usually veins volcanic wall rock alteration water table zone