Question

Describe the various forms in which minerals occur ?

Answer 1

three types of formations in which mineral occurs 1) veins and lodes in igneous and metamorphic rocks mineral may occurs in the cracks, crevices, faults or joints.
2) beds or layers in sedimentary rocks, mineral occurs in bed or layers
3) placer deposits certain minerals occurs as alluvial deposits in sands

Answer 2

Answer:

Minerals occur in following ways:

• Igneous & Metamorphic                                                                  

       Minerals may occur in the cracks, crevices, faults or joints. The smaller

       occurrences are called veins or lodes.                    

       Ex: Tin, copper, etc.

• Sedimentary Rocks:                                                                                    

       In these rocks, minerals occur in bed or layers. They have been formed

       as a result of deposition, accumulation and concentration in horizontal

       strata.                                                        

        Ex: Potash Salt, Gypsum.

• Decomposition of Surface Rocks:                                                        

        The decomposition of surface rocks, and the removal of soluble

        constituents, leaving a residual mass of weathered material containing

        ores.                                                                                    

        Ex: Bauxite.

• Alluvial Deposits:                                                                                      

        These minerals are found in the sands of valley floors and the base of

        hills . These deposits contain minerals that are not eroded by water.

        They are also known as placer deposits.

        Ex: Gold, Platinum, Tin and Silver.

• Ocean Waters.                                                                                          

        Contain vast quantities of minerals. Most of the minerals in ocean

        water are too widely diffused to be of economic importance.                              

        Ex: Magnesium, Bromine, etc.