Carbonatization

Carbonatization

 

a process of change occurring in rocks leading to the formation of carbonates of calcium, magnesium, iron, and other metals. Basic intrusive and particularly extrusive rocks most frequently undergo carbonatization under the action of hydrothermal solutions rich in carbon dioxide. Cases of strong carbonatization of granodiorites are known to occur in connection with processes causing the formation of gold and lead-zinc ore deposits. The changes that take place in the carbonate rocks themselves should also be included in the carbonatization processes, both in the diagenetic stage and in the subsequent stagesof transformation, particularly in cases of hydrothermal meta-morphism of carbonate rocks related to magmatic intrusions.Sometimes carbonatization of ultrabasic rocks is accompaniedby the formation of talc and fuchsite (chrome mica) and istherefore referred to as platy venitization. In some regions, car-bonatization serves as a prospecting indicator of certain mineraldeposits.

References in periodicals archive ?
Various types of alteration associated with mineralization have occurred in the orefield, including (1) the silicification that is associated with Sb mineralization and generally located in fault zones in the form of quartz veins, radiating quartz, and quartz druse; (2) the carbonatization that is associated with Pb-Zn mineralization in the form of Mn-Fe carbonate veins and also formed the postmineralization calcite; (3) the chlorite alteration that is generally confined to massive and stellated aggregates of chlorite within diabase; (4) the weak sericite alteration that is associated with chlorite alteration and barren quartz; and (5) the clay alteration that developed along the edges of fracture-related crushed zones.
Highlighting the main stages of CC synthesis, it should be noted that the carbonatization of glycidyl ethers can be represented as a chemisorption process described by the following equation:
Locally, garnet crystal exhibit chloritization and carbonatization developed in microfracture.
Finally, a stage of carbonatization affected the rock, with the partial replacement of feldspar by calcite, and a complete fill of previous voids.
After the storage buckets were closed, the air was blown out using argon to prevent oxidation and carbonatization processes.
Underlying the quartz stockwork zone was a series of highly foliated felsic to mafic volcanic sequences showing varying amount of carbonatization and silicification alteration.
Korozja zbrojenia inicjowana przez chlorki lub karbonatyzacje otuliny [Reinforcement corrosion initiated by chloride or carbonatization of concrete covering].
Within the host rocks, hydrothermal mineralization was accompanied by propylitization-sericitization, silicification, carbonatization, pyritization and kaolinitization.
rocks subjected to hydrothermal alteration or carbonatization (Hynes 1980)) and samples from rocks so affected yield spurious results.
The later carbonatization of quartz-depleted episyenites is characterized by high contents of CaO and C[O.sub.2] (Table 3).