Hydrothermal Alteration 1


Hydrothermal Alteration 1 : When hydrothermal water (hot water) moves through rocks beneath the surface, chemical reactions between the water and the rocks occur. These chemical reactions change (or alter) the rocks by destroying original minerals and depositing new minerals. Hydrothermally altered rocks commonly have white, yellow, orange or red colouration and may be softer than unaltered rocks
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