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Define mineral and mode of occurence! |
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Answer» ★Mode of occurrence of minerals:◆From igneous and metamorphic rocks: They are usually formed when minerals in liquid/molten and gaseous forms are forced upwards through cavities towards the earth’s surface. Ex: tin, copper etc.◆By sedimentary rocks: In these rocks, minerals occur in beds or layers. Ex. Coal, iron ore etc.◆through decomposition of surface rocks: Decomposition of surface rocks and removal of soluble constituents leaves a residual mass of weathered material which contains ores. Ex. Bauxite.◆by alluvial deposits: These minerals are found in sands of valley floors and the base of hills. These deposits are called placer deposits. They generally contain those minerals which are not corroded by water. Examples; gold, silver, etc. The naturally occurring compounds of elements are known as Mineral. |
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