Petrology and evolution of the Hercynian Pieria Granitoid Complex (Thessaly, Greece): paleogeographic and geodynamic implications

Kotopouli, C. N.; Pe‐Piper, Georgia; Piper, David J. W.

doi:10.1016/s0024-4937(99)00054-7

Cited by 21 publications

(11 citation statements)

References 40 publications

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“…This trend seems to be compatible with palaeogeographical models, which suggest southward subduction of Palaeotethys lithosphere beneath the marginal fragments of northern Gondwana (Cimmerian blocks) during the Late Palaeozoic (e.g. Ş engör et al 1984; Kotopouli et al 2000). Probably, the northward shift of magmatic activity in the upper plate (Gondwana; Fig.…”

Section: Late Palaeozoic Tectonothermal Eventsupporting

confidence: 84%

Late Carboniferous plutonism within the pre-Alpine basement of the External Hellenides (Kithira, Greece): evidence from U–Pb zircon dating

Xypolias

Dörr

Zulauf

2006

JGS

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In memory of Theodor Doutsos, for his invaluable contribution to the understanding of geology of Greece Abstract: U-Pb zircon dating of three granitic orthogneisses, sampled from Kithira island, SW Greece, provide the first reliable evidence for Carboniferous plutonism within the pre-Alpine basement of the External Hellenides. Concordant zircons from two samples yielded ages at 324 AE 2 Ma and 323 AE3 Ma, whereas the third sample yielded a lower intercept age at 320 AE 1.2 Ma. The concordant ages are interpreted to date the emplacement of the igneous protolith. Ages of inherited zircons of two orthogneisses range from 2.5 to 2.4 Ga, indicating Late Archaean-Early Proterozoic crustal components. In combination with published ages for other Aegean metagranitoids, the new U-Pb ages provide additional evidence of a temporally restricted period of plutonism in the pre-Alpine Aegean region from 325 to 300 Ma. Comparing the post-Neoproterozoic evolution of the investigated basement with that of the Cycladic and Pelagonian basements and of the continental massifs of NE Greece and Turkey, we argue that all these crustal blocks were part of the Gondwana-derived Cimmerian terrane. Based on the spatial and temporal distribution of Late Carboniferous Aegean plutonism, we suggest that this period of magmatic events results from the southward subduction of Palaeotethys beneath the marginal fragments of northern Gondwana.

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Section: Late Palaeozoic Tectonothermal Eventsupporting

confidence: 84%

Late Carboniferous plutonism within the pre-Alpine basement of the External Hellenides (Kithira, Greece): evidence from U–Pb zircon dating

Xypolias

Dörr

Zulauf

2006

JGS

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“…While the granitic plutons are typically calc-alkaline and I-type in character, the volcanic rocks are calc-alkaline, mildly alkaline and shoshonitic; their geochemical characteristics indicate a post-collisional origin with a typical subduction signature (Boztug et al 2009;). These granitoids have geochemical characteristics similar to those of post-collisional or extensional settings (Mitropoulos and Tarney 1992;Kotopouli et al 2000). The major problem in the geodynamic setting of the Aegean region is whether the subduction-related geochemical signatures of the EarlyMiddle Miocene magmatic rocks were associated with inheritance of a lithospheric-mantle source enriched by subduction-metasomatic processes or were caused by a subducting oceanic slab beneath the continental crust of western Turkey.…”

Section: Petrogenetic Considerationsmentioning

confidence: 99%

Petrogenetic evolution of the Early Miocene Alaçamdağ volcano-plutonic complex, northwestern Turkey: implications for the geodynamic framework of the Aegean region

Erkül

2011

Int J Earth Sci (Geol Rundsch)

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Extensional-tectonic processes have generated extensive magmatic activity that produced volcanic/plutonic rocks along an E-W-trending belt across north-western Turkey; this belt includes granites and coeval volcanic rocks of the Alaçamdag volcano-plutonic complex. The petrogenesis of the Early Miocene Alaçamdag granitic and volcanic rocks are here investigated by means of wholerock Sr-Nd isotopic data along with field, petrographic and whole-rock geochemical studies. Geological and geochemical data indicate two distinct granite facies having similar mineral assemblages, their major distinguishing characteristic being the presence or absence of porphyritic texture as defined by K-feldspar megacrysts. I-type Alaçamdag granitic stocks have monzogranitic-granodioritic compositions and contain a number of mafic microgranular enclaves of monzonitic, monzodioritic/monzogabbroic composition. Volcanic rocks occur as intrusions, domes, lava flows, dykes and volcanogenic sedimentary rocks having (first episode) andesitic and dacitic-trachyandesitic, and (second episode) dacitic, rhyolitic and trachytic-trachydacitic compositions. These granitic and volcanic rocks are metaluminous, high-K, and calc-alkaline in character. Chondrite-normalised rare earth element patterns vary only slightly such that all of the igneous rocks of the Alaçamdag have similar REE patterns. Primitive-mantle-normalised multi-element diagrams show that these granitic and volcanic rocks are strongly enriched in LILE and LREE pattern, high ( 87 Sr/ 86 Sr) i and low e Nd(t) ratios suggesting Alaçamdag volcano-plutonic rocks to have been derived from hybrid magma that originated mixing of co-eval lower crustal-derived more felsic magma and enriched subcontinental lithospheric mantle-derived more mafic magmas during extensional processes, and the crustal material was more dominant than the mantle contribution. The Alaçamdag volcano-plutonic complex rocks may form by retreat of the Hellenic/Aegean subduction zone, coinciding with the early stages of back-arc extension that led to extensive metamorphic core-complex formation.

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“…The Variscan Orogen can be traced eastward to the Pelagonian and external domains of the Hellenides (Neubauer and Raumer, 1993; Kotopouli et al ., 2000; Vavassis et al ., 2000; Dornsiepen et al ., 2001), the Cycladic Attica Massif (Ring et al ., 1999a; Engel and Reischmann, 2001; Reischmann et al ., 2001), and the Sakarya Zone of the Pontides (Okay et al ., 1996; Okay and Tuysuz, 1999). Carboniferous deformation, metamorphism and magmatism is generally ascribed to northward subduction of Palaeotethys and subsequent Gondwana–Laurasia collision.…”

Section: Introductionmentioning

confidence: 99%

The Variscan orogeny in Chios (Greece): Carboniferous accretion along a Palaeotethyan active margin

et al. 2003

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New stratigraphic and structural data on the turbiditic succession of Chios (Volissos turbidites) suggest that this clastic wedge formed during the Early Carboniferous. These turbidites, fed long‐distance by erosion of the Variscan orogen, were most likely deposited in a Palaeotethyan remnant‐ocean basin. They were severely deformed and structurally thickened at anchi‐metamorphic conditions before the close of the Palaeozoic. Both contractional and layer‐parallel extensional structures, high strain rates, and broken‐in‐matrix fabrics along thick shear zones may suggest deformation at the toe of an accretionary wedge. Stratigraphic, petrographic and structural data indicate that Chios represents the westernmost part of Palaeotethys which escaped the Carboniferous collision between Gondwana and Laurasia, but received great volumes of terrigenous sediments from the Variscan belt, favouring the growth of a large accretionary prism.

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Petrology and evolution of the Hercynian Pieria Granitoid Complex (Thessaly, Greece): paleogeographic and geodynamic implications

Cited by 21 publications

References 40 publications

Late Carboniferous plutonism within the pre-Alpine basement of the External Hellenides (Kithira, Greece): evidence from U–Pb zircon dating

Late Carboniferous plutonism within the pre-Alpine basement of the External Hellenides (Kithira, Greece): evidence from U–Pb zircon dating

Petrogenetic evolution of the Early Miocene Alaçamdağ volcano-plutonic complex, northwestern Turkey: implications for the geodynamic framework of the Aegean region

The Variscan orogeny in Chios (Greece): Carboniferous accretion along a Palaeotethyan active margin

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