A new paradigm, reversion to mean, or something in between The iron ore price is something of a proxy for the price of other metals. Exhibit One below1 shows the iron ore price (China Import fines 62% Fe) in USD since 1982. The exponential increase in price from 2008 to…
Introduction Banded Iron Formation (“BIF – pronounced Biff”) is the most important source of iron ore today. It occurs on all continents and iron content can be monumental. Here in Australia, the Hamersley Range in the West is thought to have initially contained 100 trillion tonnes of iron. This is…
What Equivalent grade is the term used where mineralisation that is comprised of several metals of economic value is converted to a single metal. Typically the minor metals are converted by formula and added to the grade of the major metal. The formula can vary but is often only based…
A number of companies report broad intersections of significant mineralisation and then state that this includes a narrow high grade intersection, but with no further information. For example: 20 metres at 8g/t 1 gold including one metre at 140g/t gold2 . Intersections are reported this way because a broad, good grade is more…
About Grade Many investors see grade as being an important factor when looking for an investment in the copper sector. While grade may be important for small complex deposits, it is emphatically not the most important factor with porphyry deposits. Porphyry deposits have several characteristics that make them attractive investments for…