DETERMINARI DE VARSTE POTASIU-ARGON ALE UNOR ROCI
GRANITOIDE DIN UNITATEA RETEZAT-OGRADENA

I. PAVELESCU1, G. POP2, M. SOROIU3, I. ENE2, GH. MARTINIUC2
1Catedra de mineralogie, Facultatea de geologie-geografie, Universitatea Bucuresti
2Ministerul Minelor, Petrolului si Geologiei, Intreprinderea de Metale Rare, Bucuresti
3Institutul de Fizica si Inginerie Nucleara, Bucuresti – Magurele

K-Ar DATING OF SOME GRANITOID ROCKS FROM
THE RETEZAT-OGRADENA UNIT
(Abstract)

The paper presents 10 new K-Ar ages determined for the Mraconia granite and the related vein rocks and 5 new K-Ar ages determined for the Retezat granitoid body. K-Ar ages show that the Mraconia, as well as the Cherbelezu granite were emplaced at latest during the Hercynian orogeny. The vein rocks related to the Mraconia granite range from 72±6 to 153±6 Ma. K-Ar ages obtained for the Retezat granitoid indicate a strong overprint during the Alpine orogeny.