NEW EVIDENCES FOR TRIASSIC MORB MAGMATISM IN THE NORTHERN MIRDITA ZONE OPHIOLITES (ALBANIA)

摘要: A succession of mid-ocean ridge basalts (linked at their base to serpentinite slivers) with intercalations chert levels Middle and Late Triassic, as well Early Jurassic ages have recently been found in the Argolis Peninsula, Greece (Bortolotti et al., 2001; 2002a; 2003; Saccani 2004a). This shows same lithostratigraphic tectonic setting Triassic “Volcano- sedimentary Formation” top “Rubik Complex” Mirdita Ophiolitic Nappe Albania 1996; 2002b; 2004). Moreover, ophiolites belongs ophiolitic belt, which extends from Pindos, Vourinos, Othrys Argolis. The “Volcano-sedimentary was previously interpreted by Kodra al. (1993) an Upper sequence, “precede de peu ou accompagne le debut l’ouverture (oceanisation) proprement dite du domaine ophiolitique Mirdita” (p. 66). Bortolotti (1996) confirmed this interpretation (“the sequence can be a product syn-rift, subalkaline magmatism associated thinning continental margin during Triassic”; p. 5). Thus, on bases radiolarian stratigraphy, has retro-dated times Chiari 1996). The aim paper is assess petrology tectono-magmatic significance, respect age formation, complex northern zone, provide new data for more detailed reconstruction events related formation Tethys oceanic basin Dinaric- Hellenic area.