4. Deposits
Molybdenum deposits are fairly widely distributed around the world. They span a broad range of geological eras, from the Precambrian through the Tertiary, and vary in origin. Most of the major mined deposits have low grades, below 0.5% Mo. The molybdenum content of the Earth's crust is approximately 1.5 g/t.
4.1 Porphyry deposits
Porphyry deposits account for the world’s largest resources (95%). Sulfides, including molybdenite, occur there as disseminated grains and in stockworks composed of quartz veinlets within fractured or brecciated granitic intrusive rocks, as well as in igneous or sedimentary rocks. The mineralized bodies are generally circular or oval in plan view, with very steep dips at the edges. Depending on the case, and considering the genesis...
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Deposits
Reserves
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