wall rock alterations part 1 Economic geology lecture 101 GeologyAspirant

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Wall rock alteration: - • ================ • • Wall rock: - • --..--..--..--..--.. • wall rock is the rock that constitute the wall of an area undergoing geologic activity. • E.g.: - rock along the rock of a volcano • • • Alteration: - • ..--..--..--..--..--.. • Alteration is a complex process of ion exchange whereby some constituents are removed, others are added and still others are merely redistributed. • Alteration phenomena occur in various rock types, but are perhaps more effectively studied when found in igneous masses. • Stock, flows, sills and dikes often provides the local in which progressive clay mineral alteration may take place. • • • Factors that control wall rock alteration: - • ..--..--..--..--..--..--..--..--..--..--..--..--..--..--..--..--.. • Main factors are: - • 1. Nature of wall rock • 2. Composition of the fluid • 3. Concentration, activity and chemical potential of the fluid components, such as H+, CO2, O2, K+, H2S and SO2. • • • Physical effect of alteration: - • ..--..--..--..--..--..--..--..--..--..--..--..--.. • It includes in recrystallization, change in permeability and colour. • The recrystallized area is generally more permeable than the unaltered rock, suggesting that the ores owe their localization to increase permeability. • • • Permeability: - • ..--..--..--..--..--..--.. • Permeable- certain molecules are allowed to pass through it. • Permeability is the measures of the soil’s / rocks ability to permit water to flow through its voids. • • #wall_rock_alteration #rock_alteration #metasomatism #metamorphism • #geology_aspirant #uralitization #saussuritization #chloritizatio #phyllic #sericitic #silication #silication #carbonation #Dolomitization #Greisening #tourmalinization #hematitization #fenitization #chloritization #bleaching • #symplectite • • • • 👉 join us • YouTube • / geologyaspirant • Telegram • https://t.me/GeologyAspirant • Instagram • https://www.instagram.com/geologyaspi... • • Do like and share, if you are new to the channel then please subscribe to our channel and also press the bell icon to get new geology related updates. • Thank you (team geology aspirant)

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