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 ?
The alteration assemblage includes beresitization, potash feldspathization, chloritization, and carbonatization, occurring as bands in the ore-bearing faults and pervasive alteration of nearby wall rocks.
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.
Genivar is carrying out an environmental study and a feasibility study for the surface installations, Ambuck Associates is leading the feasibility study and doing mine design for the study, AMEC is leading the tailings facility study, Bumigeme is handling the concentration and carbonatization plant study, and Acme Metallurgical Ltd.
Underlying the quartz stockwork zone was a series of highly foliated felsic to mafic volcanic sequences showing varying amount of carbonatization and silicification alteration.
Common features like, the high content of gold in the ores, the presence of a low-sulfur mineralization, presence of arsenopyrite, alteration processes characterized by chloritization and carbonatization, Hg, Cu, Ag impurities in gold and Ni-Co minerals.
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.
Four distinct alteration types are recognized: albitization, potassic alteration, carbonatization, and silicification.
Alteration includes silicification, sericitization, carbonatization and sulphide mineralization.