High-pressure metamorphism between the pelagonian Massif and Vardar Ophiolite Belt, Yugoslavia

Majer, Vladimı́r

doi:10.1180/minmag.1983.047.343.03

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…Flysch sedimentation appears to have set in throughout the Vardar zone as now exposed, by the Eocene (Mercier 1966;Rampnoux 1970), but thrusting continued into the Lower Miocene, raising the possibility of hidden sutures. A number of blueschist occurrences are now known in the Vardar zone in Yugoslavia (Majer & Mason 1983) but no details of age or tectonic setting are known to us. In the Almopias zone in Greece, HP-LT assemblages occur in meta-ophiolites structurally above the Pelagonian zone (Braud 1967).…”

Section: Introduction: Geological Evolution Of the Eastern Mediterraneanmentioning

confidence: 99%

Introduction: aspects of the geological evolution of the Eastern Mediterranean

Robertson¹,

Dixon²

1984

498

300

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SUMMARY: We review extensively the evidence and arguments bearing on the nature of Palaeotethys in relation to the age of formation, location and multiplicity of Neotethyan strands and their fate. We conclude that Palaeotethys did not die early but was only finally subducted northwards in the Tertiary along the Vardar-Intra Pontide-East Anatolian suture. Neotethyan strands must have opened into it at all times. The Adriatic promontory remained attached to Africa but rotated anti-clockwise in the mid-Tertiary. The Ponfldes are considered to be Eurasian and the Cimmerides are viewed as a 'collage terrain' formed along an oblique-convergence margin. The south Aegean, Greek and Turkish microcontinental blocks were rifted-off Gondwana in the Triassic but formation of braided Neotethyan oceanic crustal strands was essentially confined to mid-Jurassic in the Hellenides and to the Cretaceous in Turkey.We propose a new model of ophiolite genesis by asymmetrical spreading-ridge collapse in an attempt to explain both arc-like ophiolite chemistry prior to major volcanic arc edifice construction, and the synchroneity of sub-ophiolite metamorphic sole formation with Atlantic opening phases.Jurassic dispersal of Hellenide blocks had little effect in the unexpanded Turkish mosaic, but northwards Cretaceous opening of Tauride Neotethyan strands caused oblique collision deformation in the Pelagonian zone and unresolvable complexity in the Aegean. Late Cretaceous and Tertiary arc-volcanism was related in part to continuing Palaeotethyan subduction, and in part to Neotethyan destruction initiated after ridgecollapse. Diachronous collisions ensued from the Late Cretaceous onwards but significant oceanic tracts must have persisted at least to Mid-Tertiary to satisfy Africa-Eurasia separation constraints determined from Atlantic anomaly fitting. Our favoured plate evolutionary model is presented in 7 sketch-maps.

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Section: Introduction: Geological Evolution Of the Eastern Mediterraneanmentioning

confidence: 99%

Introduction: aspects of the geological evolution of the Eastern Mediterranean

Robertson¹,

Dixon²

1984

498

300

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“…L HP is defined mainly by blue amphibole, white mica and chlorite. Majer and Mason (1983) report also sodic pyroxene related to the high pressure event. Syn-D HP white mica yielded K/Ar ages of ca.…”

Section: Hp Eventmentioning

confidence: 90%

“…2,4). Sodic pyroxene has been found in the boundary zone between EPZ and Vardar/Axios Zone (Majer and Mason 1983).…”

Section: Hp Eventmentioning

confidence: 99%

Τηe Pelagonian Nappe Pile in Northern Greece and Fyrom. Structural Evolution During the Alpine Orogeny: A New Aproach

Κίλιας¹,

Frisch²,

Avgerinas³

et al. 2017

geosociety

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The geometry of kinematics and the deformation history of the Pelagonian nappe pile during the Alpine orogeny have been studied in Northern Greece and FYROM. Deformation was started in Middle-Late Jurassic time and was initially associated with ocean-floor subduction followed by ophiolites obduction, nappe stacking and duplication of the Pelagonian continent. The footwall Pelagonian segment from top to bottom was metamorphosed under greenschist to amphibolit facies conditions and a relative high pressure (T = 450o to 620o C and P = 12,5 to 8 kb). Blueschist facies metamorphic assemblages of Late Jurassic age are immediately developed between both hangingwall and footwall Pelagonian segments. Transgressive Late Jurassic-Early Cretaceous neritic limestones and clastic sediments on the top of the obducted ophiolites are maybe related to extension and basins formation simultaneously with the nappe stacking and metamorphism at the lower structural levels of the Pelagonian nappes. Contractional tectonics and nappe stacking continued during the Albian-Aptian time. Simultaneously retrogression and pressure decreasing taken place at the tectonic lower Pelagonian footwall segment. Low grade mylonitic shear zones, possible related to extension, are developed during Late Cretaceous time simultaneously with basins formation and sedimentation of neritic Late Cretaceous to Paleocene limestones and flysch. Intense shortening and imbrication under semi-ductile to brittle conditions occurred during Paleocene to Eocene time resulting the onset of the dome like formation of the footwall Pelagonian segment. The next stages of deformation from Oligocene to Quaternary are related to brittle extension and the final uplift and configuration of the Pelagonian nappe pile.

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“…In addition, in accordance with the IMA redefinition, ardennite was divided into two mineral species: more common ardennite-(As) and less common ardennite-(V) (Barresi et al, 2007). However, this was not the first analytical confirmation of the existence of the vanadate analogue of ardennite which had been described 20 years earlier by Matsubara and Kato (1987).…”

Section: Ardennite and Related Minerals -Historical Backgroundmentioning

confidence: 99%

“…Ore occurrences at the village of Nežilovo, Pelagonian Massif, North Macedonia, attract the attention of geologists and mineralogists because of the unusual associations of numerous rare and new oxygen-bearing minerals of chalcophile elements (Pb, Zn, Sb, Cu, As). The uniqueness of the forma-tion hosting these occurrences (called "mixed series") is a result of complex multistage metamorphism and metasomatic transformations of different sediments with very diverse and peculiar chemical composition (see Stojanov, 1960Stojanov, , 1967Stojanov, -1968Majer and Mason, 1983;Arsovski and Dumurdzhanov, 1984). An extensive description of the metamorphic conditions in the Pelagonides has been given by Most (2003).…”

Section: Introductionmentioning

confidence: 99%

Ardennite-bearing mineral association related to sulfide-free ores with chalcophile metals at Nežilovo, Pelagonian Massif, North Macedonia

et al. 2021

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Abstract. Among numerous minerals determined at Nežilovo, Pelagonian Massif, North Macedonia, ardennite-(As) has been discovered in two different associations and studied by means of optical microscopy, electron microprobe analysis (EMPA), and single-crystal and powder X-ray diffraction methods. The refractive indices of ardennite-(As) from Nežilovo are α=1.537(2), β=1.579(1) and γ=1.741(1), where γ corresponds to the c direction. The optical axial angle is 2Vx=49(1)∘. EMPA of the investigated samples yields the following empirical formulae: [Mn3.272+Ca0.73]Σ4.00[Al4.18Mg1.24Fe0.29Mn0.193+Zn0.10]Σ6.00(Si4.73Al0.27)Σ5.00(As0.96Si0.03V0.01)Σ1.00O22 [OH5.36(H2O)0.64]Σ6.00 for ardennite-(As) and (K0.95Na0.04Ba0.02)Σ1.01(Al1.44Fe0.303+Mg0.20Mn0.03Ti0.02 Zn0.01)Σ2.00(Si3.21Al0.79O10) (OH1.97O0.03)Σ2.00 for the associated red mica. The unit cell parameters of ardennite-(As) determined by X-ray powder diffraction are a=8.757(2) Å, b=5.836(2) Å, c=18.578(2) Å and V=941.97 Å3. The unit cell parameters of ardennite-(As) were also determined by single-crystal X-ray diffraction and are a=8.760(1) Å, b=5.838(1) Å, c=18.582(2) Å and V=950.30 Å3. Regularities of isomorphism in ardennite-related minerals are discussed. The presence of ardennite-(As) in association with 2M1 and 3T phengite polytypes provides evidence for three separate stages of formation. Conditions at which ardennite-(As) crystallized have been estimated based on compositional features of associated micas.

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High-pressure metamorphism between the pelagonian Massif and Vardar Ophiolite Belt, Yugoslavia

Cited by 10 publications

References 4 publications

Introduction: aspects of the geological evolution of the Eastern Mediterranean

Introduction: aspects of the geological evolution of the Eastern Mediterranean

Τηe Pelagonian Nappe Pile in Northern Greece and Fyrom. Structural Evolution During the Alpine Orogeny: A New Aproach

Ardennite-bearing mineral association related to sulfide-free ores with chalcophile metals at Nežilovo, Pelagonian Massif, North Macedonia

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