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Answer:
Mineral ores commonly occur in the following two formations:
1. **Veins:** These are fissures or fractures in rocks filled with mineral deposits. The minerals are precipitated from hydrothermal fluids that move through these cracks. Examples include quartz veins containing gold or silver.
2. **Lodes:** These are large, continuous masses of mineral ore that form within host rocks. Lodes often develop from magma intrusions or volcanic activity and can be extensive. Examples include copper lodes and iron lodes.
Explanation:
igenrous or magmatic in which minerals crystallize from a melt