Precambrian

Linnemann, Ulf; Romer, Rolf L.; Pin, Christian; Aleksandrowski, Paweł; Buła, Zbigniew; Geisler, Thorstein; Kachlík, Václav; Krzemińska, Ewa; Mazur, Stanisław; Motuza, Gediminas; Murphy, J. Brendan; Nance, R. Damian; Pisarevsky, Sergei A.; Schulz, B.; Ulrich, Jens; Wiszniewska, Janina; Żaba, Jerzy; Zeh, Armin

doi:10.1144/cev1p.2

Cited by 14 publications

(8 citation statements)

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“…They consist of ophiolites and island arc-related gneiss and intrusions accreted to the northern edge of the West African craton during the climax of the Pan-African orogeny (ca. 850-540 Ma) (Kröner and Stern 2004;D'Lemos et al 2006;Linnemann et al 2008;Timmerman 2008;El Hadi et al 2010;Hefferan et al 2014;Soulaimani et al 2014). During the Ediacaran, at the end of the Pan-African orogeny, the Anti-Atlas experienced post-orogenic collapse resulting in tilted basement blocks and continental basins filled by the Upper Ediacaran volcaniclastic series of the Ouarzazate Group (Gasquet et al 2008;Soulaimani et al 2014).…”

Section: Figmentioning

confidence: 99%

Post-Variscan evolution of the Anti-Atlas belt of Morocco constrained from low-temperature geochronology

Gouiza

Charton

Bertotti

et al. 2016

Int J Earth Sci (Geol Rundsch)

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Section: Figmentioning

confidence: 99%

Post-Variscan evolution of the Anti-Atlas belt of Morocco constrained from low-temperature geochronology

Gouiza

Charton

Bertotti

et al. 2016

Int J Earth Sci (Geol Rundsch)

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“…Variscan massifs in Phanerozoic Europe vary in size, amount and extent of rifts and the Cenozoic volcanism (Figure ). The Bohemian Massif (BM) represents the easternmost and the most prominent relic of the Late Paleozoic collisional belt of the Variscides in central Europe [ Franke , ; Linnemann et al ., ]. The BM unit assemblage was created during the Variscan cycle resulting from the collision of two major continents–Gondwana to the south and Laurentia‐Baltica to the north [ Matte , ].…”

Section: Tectonic Backgroundmentioning

confidence: 99%

Cenozoic volcanism in the Bohemian Massif in the context of P‐ and S‐velocity high‐resolution teleseismic tomography of the upper mantle

Plomerová

Munzarová

Vecsey

et al. 2016

Geochem Geophys Geosyst

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New high-resolution tomographic models of P-and S-wave isotropic-velocity perturbations for the Bohemian upper mantle are estimated from carefully preprocessed travel-time residuals of teleseismic P, PKP and S waves recorded during the BOHEMA passive seismic experiment. The new data resolve anomalies with scale lengths 30-50 km. The models address whether a small mantle plume in the western Bohemian Massif is responsible for this geodynamically active region in central Europe, as expressed in recurrent earthquake swarms. Velocity-perturbations of the P-and S-wave models show similar features, though their resolutions are different. No model resolves a narrow subvertical low-velocity anomaly, which would validate the ''baby-plume'' concept. The new tomographic inferences complement previous studies of the upper mantle beneath the Bohemian Massif, in a broader context of the European Cenozoic Rift System (ECRIS) and of other Variscan Massifs in Europe. The low-velocity perturbations beneath the Eger Rift, observed in about 200km-broad zone, agree with shear-velocity models from full-waveform inversion, which also did not identify a mantle plume beneath the ECRIS. Boundaries between mantle domains of three tectonic units that comprise the region, determined from studies of seismic anisotropy, represent weak zones in the otherwise rigid continental mantle lithosphere. In the past, such zones could have channeled upwelling of hot mantle material, which on its way could have modified the mantle domain boundaries and locally thinned the lithosphere.

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“…). The Late Neoproterozoic and Early Palaeozoic basement development in both Alpine Tethys margins is characterized by discrete age clusters, which correlate with orogenic cycles overprinting inherited Archaean and Proterozoic events (Linnemann et al ., ).…”

Section: The Basement Of the Alps A Source Of Detrital Zirconsmentioning

confidence: 97%

Tracing Alpine sediment sources through laser ablation U–Pb dating and Hf‐isotopes of detrital zircons

2013

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Alpine provenance studies based on conventional methods such as sandstone framework grain and heavy mineral analyses are now enhanced by improved techniques in laser ablation inductively coupled plasma mass spectrometry detrital zircon analysis. Although the conventional methods appear to have reached their limits of resolution in palaeogeographic problems, laser ablation inductively coupled plasma mass spectrometry U–Pb dating of detrital zircons adds the time dimension to the provenance analysis. Hafnium‐isotope ratios measured on dated zircons give further information on the origin of the magmas in which the detrital zircons have grown. This study reports detrital zircon U–Pb dating and Hf‐isotope results from sandstone formations related to rifting, drifting and subduction settings at different stages of the Alpine Tethys development. This study is a first evaluation of the correlation between U–Pb age and isotopic features of detrital zircons aimed at describing source terranes in different palaeogeographic domains in the Alpine Tethys area. Pan‐African/Cadomian (Ediacaran–Ordovician), Variscan (Middle Devonian–Carboniferous) and Post‐Variscan (Permian) detrital zircon populations are present in nearly all palaeogeographic settings, but in varying amounts. Single Mesoproterozoic and Palaeoproterozoic detrital zircons are found as minor populations. When comparing the northern and southern margins of the Alpine Tethys, the southern margin detrital sources are characterized mostly by a decreased occurrence or by the absence of Silurian–Devonian zircons. A major distinction between northern (Helvetic, North and Middle Penninic domains) and southern (Austro‐Alpine and South Alpine domains) detrital sources is the occurrence of Triassic zircons at the southern Alpine Tethys margin during rifting and subduction stage sedimentation. Hafnium‐isotope ratios measured on uppermost Permian–Triassic zircons from the South Alpine domain suggest a continental crust derivation of the hosting magmas, as expected in a continental rift environment. In the late stage of Alpine convergence (Late Cretaceous–Palaeogene), the Permian–Triassic zircons are reworked into basins situated on the northern Alpine Tethys margin.

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Precambrian

Cited by 14 publications

References 0 publications

Post-Variscan evolution of the Anti-Atlas belt of Morocco constrained from low-temperature geochronology

Post-Variscan evolution of the Anti-Atlas belt of Morocco constrained from low-temperature geochronology

Cenozoic volcanism in the Bohemian Massif in the context of P‐ and S‐velocity high‐resolution teleseismic tomography of the upper mantle

Tracing Alpine sediment sources through laser ablation U–Pb dating and Hf‐isotopes of detrital zircons

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