Veins and lodes
Topic: Mineral Resources of India: Distribution and Conservation · NCERT: Class 10, Ch 5 "Minerals and Energy Resources"
Meaning
Veins and lodes are mineral deposits in the cracks, faults and joints of igneous and metamorphic rocks. Molten or gaseous minerals are pushed up through these openings, then cool and harden. Small deposits are called veins and large ones are called lodes. Tin, copper, zinc and lead mostly come from them. Since they run deep and narrow, they are often worked by underground shaft mines.
Example
The Khetri copper deposits in Jhunjhunu district, Rajasthan, and the lead-zinc deposits of the Aravallis occur as veins and lodes.
Don't confuse with
- Bedded mineral deposits: these lie in flat layers of sedimentary rock (coal, gypsum), not in cracks of hard rock.