Carpholite, sudoite, and chloritoid in low-grade high-pressure metapelites from Crete and the Peloponnese, Greece

Kinematic reconstructions and magmatic evolution illuminating crustal and mantle dynamics of the eastern Mediterranean region since the late Cretaceous

“…Further west, the Gavrovo-Tripolitza and Ionian platforms started to subduct at the same time after the closure of the Pindos basin (figure 9) [Sotiropoulos et al, 2003;van Hinsbergen et al, 2005b]. The external parts of these carbonate platforms were accreted to the Hellenides, remaining at low pressure while their buried internal parts, comprising their basements, recorded HP-LT metamorphism forming the Phyllite-Quartzite and the Plattenkalk units in Crete and the Peloponnese [Bonneau and Kienast, 1982;Seidel et al, 1982;Theye et al, 1992;Trotet et al, 2006;Jolivet et al, 2010b]. These metamorphic units were then exhumed in the footwall of the top-to-the N Cretan detachment since ~25 Ma, following a cold retrograde path [Jolivet et al, 1996[Jolivet et al, , 2010cRing et al, 2001].…”

“…16-18 kbar, 400-550 °C) affected the basement of the GavrovoTripolitza and the Ionian nappes, thus giving the Phyllite-Quartzite and the Plattenkalk units, respectively (figures 4 and 6) [Bonneau and Kienast, 1982;Seidel et al, 1982;Theye et al, 1992;Jolivet et al, 1996;van Hinsbergen et al, 2005c;Trotet et al, 2006]. Exhumation of these units occurred between 24 and 9 Ma (Ar-Ar crystallization ages on white mica and fission track ages on zircon) in the footwall of the Cretan detachment, which accommodated more than 100 km of displacement (figures 3 and 5) [Jolivet et al, 1996[Jolivet et al, , 2010cRing et al, 2001;van Hinsbergen and Meulenkamp, 2006;Papanikolaou and Royden, 2007;Marsellos et al, 2010].…”

The Nature of Ductile Deformation in the Phyllite-Quartzite Unit (External Hellenides)

“…Metamorphic index minerals in the Plattenkalk unit have only been found in central Crete at the Talea Window and indicate P-T conditions of 7-10 kbar and ca. 350 °C (Theye et al, 1992). Exceptionally in west Crete, an Upper Triassic−Lower Jurassic carbonate sequence, the Tripali unit, lies tectonically between the Plattenkalk and the PQ units.…”

“…1 km (Xypolias et al, 2007). Metamorphic conditions in the PQ unit ( Theye et al (1992), Blumör (1998). Inset: generalized map of the Alpine chain in southeastern Europe (modified after Xypolias et al 2007).…”

“…Theye et al, 1992). Peak P-T conditions have been constrained at 450 ± 30 °C and 13-17 kbar (Theye et al 1992, Blumör 1998 while the age of the metamorphic peak is constrained at 19-24 Ma (K-Ar and 39 Ar-40 Ar on white mica; e.g.…”