Alunitization
Definition
A geological process of acid hydrothermal alteration of volcanic or magmatic rocks rich in feldspars, under the action of ascending solutions charged with sulfuric acid; the act of transforming into alunite. This structural phenomenon leads to the replacement of primary minerals with alunite, quartz, and kaolinite, constituting a valuable indicator in geological prospecting for metalliferous deposits.
Bilingual Equivalents
- Alunitization
- Alunization
Grammatical & Source Details
| Inflection Type | Feminine noun, regular structural plural variations used in scientific reports. |
| Formation | Noun of action derived from the technical verb 'alunitiza' using the functional suffix '-re'. |
| Spelling / Pronunciation | [a.lu.ni.ti.ˈza.re] |
| Source | Glossary of Volcano-Tectonic and Hydrothermal Systems |
Contextual Usage Examples
RO: Studiul petrografic a confirmat o alunitizare intensă a riolitelor din apropierea vechilor hornuri vulcanice.
EN: The petrographic study confirmed an intense alunitization of the rhyolites near the old volcanic vents.
RO: Procesul de alunitizare modifică radical densitatea și porozitatea structurală a rocii gazdă.
EN: The alunitization process radically modifies the density and structural porosity of the host rock.
RO: Cartografierea zonelor cu alunitizare avansată i-a ghidat pe ingineri către descoperirea unui nou filon aurifer.
EN: Mapping the zones with advanced alunitization guided the engineers to the discovery of a new gold vein.
Idioms & Phrases
Zonă de alunitizare / Alunitization zone
RO: Areal geologic delimitat structural unde rocile au suferit o transformare cvasicompletă sub influența vaporilor sulfatici.
EN: A structurally delimited geological area where rocks have undergone an almost complete transformation under the influence of sulfate vapors.
Alunitizare hidrotermală / Hydrothermal alunitization
RO: Fenomen geochimic provocat de circulația soluțiilor fierbinți și acide prin fisurile scoarței terestre.
EN: A geochemical phenomenon caused by the circulation of hot, acidic solutions through the cracks of the Earth's crust.
Intensitate a alunitizării / Intensity of alunitization
RO: Gradul de înlocuire mineralogică a feldspaților originali dintr-o rocă cu agregate noi de alunit.
EN: The degree of mineralogical replacement of the original feldspars in a rock with new aggregates of alunite.
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