Dissolution-recrystallization model

Ascending hydrothermal solution interacts with ore body, resulting to dissolution of minerals and recrystallization. 

The following Gibbs-Kelvin equation is established for the solution saturated with grain with size r (Nielsen 1964) which is given by 

From (4.15) the ratio of solubility of grain with size r (nir) to bulk concentration (m) is 

---

In Dubinina and Lakshtanov s (1997) Type II model, dissolution-precipitation proceeds by the Ostwald ripening after mineral synthesis. Upon completion of mineral synthesis (Type I), the phase B consists of an aggregate of crystals of different grain sizes. The recrystallization of these mineral grains will take place by Ostwald ripening,... 

The electrochemical equipment consisted of a poten-tiostat (PAR, model 173) using a three-electrode system and a fimction generator (PAR, model 175) as programmer for the ORC. Furthermore, a digital Coulomb meter was connected to measure the charge transfer during the ORC, which indicates the degree of metal dissolution and recrystallization of the electrode. 

---