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 |
From inside the book
Results 1-5 of 85
Page 17
... grade copper on the London Metal Exchange for 1950 to 1994, both 1000 expressed in constant 1985 U.S. 1950 1960 1970 1980 1990 dollars. 1 200 this metal is not determined so much by industrial demand as by fashion and sentiment—two ...
... grade copper on the London Metal Exchange for 1950 to 1994, both 1000 expressed in constant 1985 U.S. 1950 1960 1970 1980 1990 dollars. 1 200 this metal is not determined so much by industrial demand as by fashion and sentiment—two ...
Page 18
... grade zinc in New York for 1950 to 1994, _ -1 T l_ 1 _ T' expressed in constant 1985 0.8. 1950 1960 1970 1980 1990 dollars. 2 200 — " _ I I 2000 —- I I >- I | 1600 — , \ 600 ' I I 3 ,' 500 C e 1200 - 1 N l9 1 g — , I Production 400 Q I ...
... grade zinc in New York for 1950 to 1994, _ -1 T l_ 1 _ T' expressed in constant 1985 0.8. 1950 1960 1970 1980 1990 dollars. 2 200 — " _ I I 2000 —- I I >- I | 1600 — , \ 600 ' I I 3 ,' 500 C e 1200 - 1 N l9 1 g — , I Production 400 Q I ...
Page 20
... grade. The 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 ...
... grade. The 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 ...
Page 21
... grading possible from the plant and the petrography of the pebbles. As another example, limestone has a wide variety of ... grade. Thus, nickel is recovered far more readily from sulphide than from silicate ores, and sulphide ores can be ...
... grading possible from the plant and the petrography of the pebbles. As another example, limestone has a wide variety of ... grade. Thus, nickel is recovered far more readily from sulphide than from silicate ores, and sulphide ores can be ...
Page 22
... grade. Large, low grade deposits that occur at, or near, the surface can be worked by cheap open pit methods (Fig. 2.8) whilst thin tabular vein deposits will necessitate more expensive underground methods of extraction, although ...
... grade. Large, low grade deposits that occur at, or near, the surface can be worked by cheap open pit methods (Fig. 2.8) whilst thin tabular vein deposits will necessitate more expensive underground methods of extraction, although ...
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