Why are metallic minerals found in igneous rocks?

Well Siya, metallic minerals are found in all three major type of rocks-IGNEOUS (ultramafic through felsic), SEDIMENTARY (most iron ore, placer gold), & METAMORPHIC (Rampura Agicha lead-zinc deposits) or most aluminium as residual concentration due to weathering. . read more

Non-metallic minerals are found everywhere and there is no bias for non-metallic minerals to be more abundant in sedimentary rocks compared to any other type. There are also plenty of cases where sedimentary rocks are mined for metal ores. read more

Rock and Mineral Kits. Minerals of Newfoundland and Labrador. Metallic Minerals; Metallic Minerals. Newfoundland and Labrador has a varied selection of metallic minerals. The following is a small representation of this selection. They depict the quality of collectible metallic minerals available in Newfoundland and Labrador. read more

Most "mother lode type deposits are found in "hard" rock, as opposed to sedimentary rock. So in essence the difference is mode of formation. Non-metallic minerals can form a lower temperatures as well as high temperatures, but hydrothermal deposits require much higher temperatures and pressures. read more