Adrian-Iulian PANTIA & Andra-Elena FILIUȚĂ - HEAT SENSITIVE BLUE QUARTZ – THE UNUSUAL OCCURRENCE OF ALBEȘTI, ROMANIA, Carpathian Journal of Earth and Environmental Sciences, February 2021, Vol. 16, No. 1, p. 175 – 186; Doi:10.26471/cjees/2021/016/165

Adrian-Iulian PANTIA, George DINCĂ & Andra-Elena FILIUȚĂ - REVISITING THE CUBIC BLUE CHALCEDONY FROM TRESTIA, MARAMUREȘ COUNTY, ROMANIA, Carpathian Journal of Earth and Environmental Sciences February 2024, Vol. 19, No. 1, p. 5 – 16; DOI:10.26471/cjees/2024/019/275

Large platy symplectitic aggregates composed of corundum and albite appear in quartz veins crosscutting heavily retrogressed eclogites in the Căpățâna Mountains, South Carpathians. They were identified as pseudomorphs after kyanite initially formed in the veins. Protracted circulation of reactive fluids of alkaline composition along the veins produced corundum-forming breakdown of kyanite. Sluggish aluminium silicate – forming reaction between quartz and corundum enabled metastable coexistence of the two incompatible minerals, which were nevertheless found separated by a seam of biotite rather than in direct contact.