Preliminary results of the geological structure and kinematics of deformation in Mt. Tzena (Paikon subzone, Central Macedonia, Greece)

Published: Jan 1, 2001
Paikon subzone Tzena Mt. Tertiary kinematics deformation shear zone metamorphism orogen extension

The Tzena Mt. belongs to the Paikon subzone (Axios zone, Central Macedonia, Greece) and consists of 5 distinguishable lithological units, which are from the lower to the upper the following: the lower unit of gneisses, the marbles unit, the black phyllites, the meta-volcanosedimentary unit and the meta-flysch. These units form a metamorphic sedimentary sequence of Upper Paleozoic to Lower Cretaceous age, while the metarhyolites of the volcanosedimentary unit are of Jurassic age. Kinematic analysis of the deformation in Tzena Mt. suggests that the whole metamorphic sequence has been affected by a strong shearing and mylonitisation in ductile to semi-ductile conditions, trending SW-NE, contemporaneous with a retrograde metamorphism in greenschist facies. Kinematic indicators show sense of movement both top to the SW and NE while a streching lineation, trending SW-NE, defined by preferred orientation of white mica and chlorite remains stable all over the metamorphic sequence. The Upper Cretaceous carbonates of the adjacent to Tzena, Pinovon Mt., have been affected by this deformation as well, and hence the deformation took place in Tertiary times. However, the contact between the lower gneiss unit and the marbles unit constitute a shear zone, in ductile to semi-ductile conditions, trending SW-NE with a sense of shear top to the SW. Thus, the marbles have been moved upon the gneisses along a large shear zone towards SW, during the Tertiary deformation. Correlation between this tertiary SW-NE deformation event in Tzena Mt. with the similar tertiary shear deformation towards SW in Paikon Mt., suggests that Tzena and Paikon Mts. have the same tectonic history in Tertiary times. Analogous Tertiary tectonic events with similar geometry and kinematics of the deformation have already been established for several other areas in Greece (Olympos - Ossa Mts., Rhodope Mt., Cyclades islands etc.) where they have caused the exhumation of metamorphic core complex (Kilias & Mountrakis, 1990, Sokoutis et al., 1993, Kilias, 1995, Dinter, 1998, Kilias et al., 1999). Thus, in relation to these, an exhumation of the Tzena orogen, consisting of the metamorphic sequence, during the Tertiary extensional tectonic process could be very possible.

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BAROZ Ε, ΒΕΒΙΕΝ J., ΙΚΕΝΝΕ Μ., 1987. An example of HP-LT metamorphic rocks from an island-arc: the Paikon series (Innermost Hellenides, Greece). J. Metamorphic Geol., 5, 509-527.
BEBIEN J., PLATEVOET B., MERCIER J., 1994. Geodynamic significance of the Paicon massif in the Hellenides: Contribution of the volcanic rock studies. Bulletin of the Geol. Society of Greece, vol. xxx/1, p. 63-67, 7th Congress, Thessaloniki.
BROWN S., ROBERTSON Α., 1994. New structural evidence from the Mesozoic-early Tertiary Paicon unit, Northern Greece. Bulletin of the Geol. Society of Greece, vol. xxx/1, p. 159-170, 7th Congress, Thessaloniki.
DINTER D., 1998. Late Cenozoic extension of the Alpine collisional orogen, northeastern Greece: Origin of the north Aegean basin. GSA Bulletin, Vol. 110, No. 9, p. 1208-1230.
FERRIERE J., STAIS Α., 1994. Un ou des bassin(s) Tethysien(s) Vardarien(s) au Mesozoique? Bulletin of the Geol. Society of Greece, vol. xxx/1, p. 91-103, 7th Congress, Thessaloniki.
GODFRIAUX I., RICOU L. E., 1991. Le Paicon, une fenêtre tectonique dans les Hellenides Internes (Macédoine, Grece). C. R. Acad. Sci. Paris, t. 313, Serie 2, p. 1479-1484.
HANMER S., PASSCHIER C.W., 1991. Shear - Sense Indicators: A Review. Geol. Survey of Canada, 90-17, p. 72.
KILIAS Α., MOUNTRAKIS D., 1990. Kinematics of the crystalline sequences in the western Rhodope massif. Geol. Rhodopica, 2nd Hell. - Bulg.. Symposium, Thessaloniki, p. 100 - 116.
KILIAS Α., 1995. Tectonic evolution of the Olympus-Ossa Mt.: Emplacement of the blueschists unit in eastern Thessaly and exhumation of Olympus-Ossa carbonate dome as a result of tertiary extension (Central greece). Mineral Wealth 96/1995.
KILIAS Α., FALALAKIS G., MOUNTRAKIS D., 1999. Cretaceous - Tertiary structures and kinematics of the Serbomacedonian metamorphic rocks and their relation to the exhumation of the Hellenic hinterland (Macedonia, Greece). Int. Journal of Earth Sciences, 88, p. 513-531.
MERCIER J., 1966. Etude géologique des zones Internes des Hellenides en Macédoine centralle. Contribution a Γ etude du métamorphisme et de Γ evolution magmatique des zones internes des Hellenides. Thesis, Paris, Ann. Geol. Payw Hell., 20 (1968), Danßec0c, p. 751-779.
MERCIER J., VERGELY P., BEBIEN J., 1975. Les ophiolites helléniques "obductees" au Jurassique supérieur sont-elles les vestiges d' un ocean tethysien ou d' une mer marginale peri-europeene? - CR. somm. Soc. Geol. France, 4, 108-112.
MIGIROS G., GALEOS Α., 1990. Tectonic and stratigraphie significance of the Ano Garefïc ophiolitic rocks, (Northern Greece). Ophiolites, oceanic crustal analognes. Proceedings of the symposium "Troodos 1987". Edited by J. Malpasetal, p. 279-284.
PASSCHIER C.W., TROUW R.A.J., 1996. Micro - Tectonics. Springer - Verlag, New York, 289 p.
RICOU L. E., GODFRIAUX I., 1991. Une coupe a travers les ophiolites et gneiss allocthones entre le massif Pelagonien et la fenêtre du Paikon (Grece du Nord). C. R. Acad. Sci. Paris, t. 313, Serie 2, p. 1595-1601.
RICOU L. E., GODFRIAUX I., 1995. Mise au point sur la fenêtre multiple du Paicon et la structure du Vardar en Grece. C. R. Acad. Sci. Paris, t. 321, Serie 2a, p. 601-608.
SOKOUTIS D., BRUN J.P, VAN DEN DRIESSCHE J., PAVLIDES S., 1993. A major Oligo-Miocene detachment in southern Rhodope controlling north Aegean extension. J. Geological Society, Vol. 150, p. 243-246.
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