How much molybdenum is typically present in copper porphyry deposits?

In copper porphyry deposits, the molybdenum content is relatively low, typically ranging between 0.005 and 0.05 percent.1

While these deposits are very large, molybdenum is generally recovered from them as a byproduct or coproduct of copper mining. In contrast, primary molybdenum deposits—which account for approximately 40 percent of global production—contain higher concentrations, typically between 0.1 and 0.5 percent molybdenum.12