INDIAN GEOGRAPHY

Detailed explanation-1: -In igneous and metamorphic rocks minerals may occur in the cracks, crevices, faults or joints. The smaller occurrences are called Veins and the larger is called Lodes. In most cases, they are formed when minerals in liquid/molten and gaseous forms are forced upward through cavities towards the earth’s surface.

Detailed explanation-2: -Veins are dilated fractures filled with oriented crystal fibers or non-oriented mineral deposits (typically quartz, calcite or carbonates). Veins occur in rocks of all types and metamorphic grades with thickness from less than a millimeter to several meters.

Detailed explanation-3: -There are predominantly two types of occurrences of minerals. The smaller occurrences are called veins and the larger are called lodes. Another type of occurrence is when minerals occur in Beds and layers in Sedimentary rocks.

Detailed explanation-4: -The minerals that can be obtained through veins and lodes are copper and zinc.

Detailed explanation-5: -In the metamorphic rocks and igneous rocks minerals are found in cracks, joints. The small cracks are called veins and large cracks are called lodes. Examples are minerals like tin, copper, zinc, lead etc.