, Lecture 3
Key definitions in Economic
Geology
Dr Ben Hayes (School of Geosciences, Wits University)
,Outline and take home messages
1) Definition of an ore
2) Ores and by-products
3) Primary and secondary ores
4) Concentration factor, grade and cut-off grade
5) An introduction to some genetic terms…
6) Dispersed, confined, concordant and discordant ore deposits
7) Reserves and resources
, What is an ore? Bornite
o When the concentration of an inorganic
element is such that it is an economic
proposition to mine the rock for one (or
more elements), the rock is termed an ore
o An ore is a naturally occurring mineral (or
aggregate of minerals) from which a metal
(or metals) may be extracted, treated, or Chrom
beneficiated with profit or expectation of
profit
o Profit is the key term and it varies deposit by
deposit
Key definitions in Economic
Geology
Dr Ben Hayes (School of Geosciences, Wits University)
,Outline and take home messages
1) Definition of an ore
2) Ores and by-products
3) Primary and secondary ores
4) Concentration factor, grade and cut-off grade
5) An introduction to some genetic terms…
6) Dispersed, confined, concordant and discordant ore deposits
7) Reserves and resources
, What is an ore? Bornite
o When the concentration of an inorganic
element is such that it is an economic
proposition to mine the rock for one (or
more elements), the rock is termed an ore
o An ore is a naturally occurring mineral (or
aggregate of minerals) from which a metal
(or metals) may be extracted, treated, or Chrom
beneficiated with profit or expectation of
profit
o Profit is the key term and it varies deposit by
deposit
