Eclogites associated with high-grade blueschists in the Cyclades archipelago, Greece: A review
Okrusch, Martin; Bröcker, Michael
European Journal of Mineralogy Volume 2 Number 4 (1990), p. 451 - 478
published: Aug 31, 1990
manuscript accepted: Mar 28, 1990
manuscript received: Dec 5, 1989
ArtNo. ESP147050204002, Price: 29.00 €
Abstract The lowermost group of units of the Attic-Cycladic crystalline complex is formed by a stacked sequence of thrust sheets composed of a Permo-Mesozoic sequence of marbles, metapelites, acid and basic metavolcanites underlain by remnants of a pre-Alpidic crystalline basement. The complex underwent a high-pressure metamorphism in Eocene times and was affected by a Oligo-/Miocene medium-pressure overprint under greenschist to amphibolite fades conditions. The high-pressure assemblages, best preserved on the islands of Sifnos and Syros conform to the transition from the epidote-blueschist to the eclogite facies with temperatures of about 450-500 °C and pressures in the range between 12 and 20 kbar. The high-pressure event is inferred to be related to the northward directed subduction of the Apulian microplate beneath the Eurasian continent.