40 Ar/39/Ar dating and cooling history of the Pangeon granitoids, Rhodope Massif (Eastern Macedonia, Greece)

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Published: Jan 1, 2001
DOI: https://doi.org/10.12681/bgsg.17116
Keywords:
Rhodope massif Pangeon granitoids 40Ar/39Ar dating cooling history
G. ELEFTHERIADIS
University of Thessaloniki, Dept. of Mineralogy-Petrology-EconomicGeology
W. FRANK
Universitôt Wien, Institut for Geologie, Geochronologisches Labor
K. PETRAKAKIS
Universitôt Wien, Institut fór Petrologie
Abstract

The Pangeon granitoids are distinguished into two pétrographie types with sharp contacts: (a) heterogranular, medium- to coarse-grained, hornblende+biotite- bearing porphyritic tonalités and granodiorites (PTG), and, (b) equigranular, medium-grained, biotite±muscovite-bearing granodiorites and granites (MGG). Dark-coloured, medium-grained monzodioritic enclaves occur in PTG rocks. Hornblende 40Ar/39Ar spectra from the PTG rocks yielded cooling ages of 21.7±0.5 Ma to 18.8±0.6 Ma. With the exception one sample, the corresponding hornblende ages from enclaves coincide well with the above ages. The age of 21.7±0.5 Ma is considered as the lower limit for the PTG rocks emplacement. Muscoviteplateau ages of c. 15.7±0.5 Ma and total gas biotite ages of 15.2±0.4 Ma to 13.8±0.5 Ma from the studied rocks, constrain the cooling history of the Pangeon granitoids (with some local variations) in the range 430 - 300Ί C.

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  • Petrology
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References
DE LA ROCHE, H, LETERRIER, J., GRAND CLAUDE, P.& MARCHAL, M. (1980): A classification of volcanic and plutonic rocks using R - R diagrams and major element analyses - its relationships and current nomenclature. Chem. Geol., 29, 183-210.
DINTER, D.A. & ROYDEN, L. (1993): Late Cenozoic extension in northeastern Greece: Strymon Valley detachment and Rhodope metamorphic core complex. Geology, 21, 45-48.
DINTER, D.A., MACFARLANE, Α., HAMES, W., ISACHSEN, C, BOWRING, S. & ROYDEN, L. (1995): UPb and 40Ar/39Ar geochronology of the Symvolon granodiorite: Implications for the thermal and structural evolution of the Rhodope metamorphic core complex, northeastern Greece. Tectonics, 14, 886-908.
ELEFTHERIADIS, G., FRANK, W. & PETRAKAKIS, K. (1999): 40Ar/39Ar geochronology of the Pangeon granitoids, Rhodope Unit (northern Greece). Beih. z. Eur. J. Mineral., 11, 62.
ERDMANNSDOERFFER, O.H. (1920): Über metamorphe Gesteine in Mazedonien. Sitzungsber. Preuss. Akad. Wiss- Mitt, aus der Sitzung der phys.-math. KL, 32, 576-583, Berlin.
HARRE, W., KOCKEL, F., KREUZER, H., LENZ, H., MUELLER, P. & WALTHER, H.W. (1968): Über Rejuvenationen im Serbo-Madzedonischen Massiv (Deutung radiometrischer Altersbestimmungen). 23rd Int. Geol. Cong., 6, 223-236.
HARRISON, T. M. (1981): Diffusion of 40Ar in hornblende: Contrib. Mineral. Petrol, 78, 324 - 331.
HEJL, E., WEINGARTNER, H., VAVLIAKIS, E. & PSILOVIKOS, A. (1998): Macrorelief features and fissiontrack thermochronology of the Rila-Rhodope massif (eastern Macedonia, Greece). Ζ. Geomorph. Ν.F., 42, 517-530.
KYRIAKOPOULOS, G. Κ., MAGGANAS, C. Α., NORELLI, P., BIGAZZI, G., DEL MORO, A. & KOKKINAKIS A. (1997): Thermochronological evolution of Symvolon and Pangeon plutons and their country rocks, Kavala area, Ν. Greece: an apatite fission track analysis. Ν. Jb. Miner. Mh., 519-529.
MEYER, W. (1968): Zur Altersstellung des Plutonismus im Südteil der Rila-Rhodope-Masse (Nordgriechenland). Geologica et Paleontologica, 2, 173-192.
OSSWALD, K. (1938): Geologische Geschichte von Griechisch-Nordmazedonien. Denkschr. Geol. Landesanst. Griechenland, 3, 142 p, Athen.
PAPANIKOLAOU, D. & PANAGOPOULOS, A. (1981): On the structural style of Southern Rhodope, Greece. Geol. Balcanica. 11,3, 13-22.
SCHENCK, P.-F. (1970): Geologie des westlichen Pangaion in Griechisch-Ostmakedonien. Beih. Geol. Jb., 88, 81-132.
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