Nickel deposits are typically found as concentrations in lateritic soils or in association with sulfide minerals in ultramafic magmatic rocks. Nickel occurs often with platinum group elements and has geochemi-cal affinities that make it occur with sulfide minerals such as pyrite, chalcopyrite, and pyrrhotite in ultamafic rocks such as komatiites.

Other nickel deposits are found in tropical regions, where lateritic weathering leaches away many elements, leaving just the residual material such as nickel that is not soluble. These deposits, called nickel laterite deposits, are found in parts of Africa including Madagascar and in the Caribbean. In most cases the host rock is ultramafic, but in some examples the tropical weathering is so intense that the nickel and associated metals are concentrated from other host rocks. Gold may also be concentrated in some lateritic weathering profiles.

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The Basic Survival Guide

The Basic Survival Guide

Disasters: Why No ones Really 100 Safe. This is common knowledgethat disaster is everywhere. Its in the streets, its inside your campuses, and it can even be found inside your home. The question is not whether we are safe because no one is really THAT secure anymore but whether we can do something to lessen the odds of ever becoming a victim.

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