Intrusion Related Gold Systems

Intrusive Related Gold Systems (“IRGS”) are today’s “last frontier” for gold exploration. They are the most recent of the major types of gold system to be discovered and defined, and thus appear to have the greatest discovery potential. Definition IRGS deposits are one of three major types of gold deposit,…

Classification of Gold Systems

The Earth’s mineral deposits, as for much of Nature, are a continuum. Geologists attempt to better understand these deposits through classification and interpretation of the variables they can understand, while being aware that there are many more they may never understand. The rationale for classification is to facilitate communication, which…

A Brief Overview of Coal: Part Two – Rank & Uses

Coal rank is effectively a measure of the maturity of coal. The first stage of the coalification of peat forms brown coal, or lignite, followed by subbituminous coal, bituminous coal and finally anthracite. Before discussing each coal rank in a little more detail, it is important to note that there…

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