Tethyan margins in space and time

Stampfli, Gérard M.; Marcoux, Jean; Baud, Aymon

doi:10.1016/0031-0182(91)90142-e

Cited by 414 publications

(215 citation statements)

References 57 publications

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“…7, 8). The diachronous Palaeo-Tethys opening in Silurian-Early Devonian times is viewed as a back-arc opening along the Gondwana margin (Stampfli et al 1991;Stampfli 2000). Faunistic assemblages (Schönlaub 1997a(Schönlaub , 1997bSchönlaub 1993;Schönlaub and Histon 2000) and palaeomagnetic data (Bachtadse et al 1995;Schätz et al 1997;Tait et al 1998;Torsvik and Eide 1998) support the migration of the Hun superterrane towards Laurussia.…”

Section: Scenario Of Peri-gondwanan Evolution: a Conclusionmentioning

confidence: 99%

Organization of pre-Variscan basement areas at the north-Gondwanan margin

et al. 2001

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Section: Scenario Of Peri-gondwanan Evolution: a Conclusionmentioning

confidence: 99%

Organization of pre-Variscan basement areas at the north-Gondwanan margin

et al. 2001

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“…Late Palaeozoic (Permian) rifting of the future Neotethys Ocean has formed ribbon continental fragments in Iran that broke away from the northern margin of Gondwana (e.g., Berberian and King 1981;Ş engör 1990;Stampfli et al 1991;Stampfli and Borel 2002;Mohajjel et al 2003;Ghasemi and Talbot 2006;Agard et al 2011;Richards 2015) although relationships to Triassic terrane accretion to the north of Central Iran remains partly unclear (Buchs et al 2013;Zanchi et al 2015). This contribution deals with the Sanandaj-Sirjan zone (SSZ; Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Late Carboniferous-Permian rifting of the Neotethys Ocean was followed by a phase of pronounced subsidence and shallow marine and basinal sedimentation in Permian through Triassic time (e.g., Stampfli et al 1991Stampfli et al , 2001Besse et al 1998;Mohajjel and Fergusson 2014;Hassanzadeh and Wernicke 2016). Hassanzadeh and Wernicke (2016) recently considered the SSZ as an archetype of passive continental margin subsequently, during Jurassic, transformed into an active continental margin.…”

Section: Introductionmentioning

confidence: 99%

Tectonic significance of Triassic mafic rocks in the June Complex, Sanandaj–Sirjan zone, Iran

et al. 2017

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This study concentrates on the petrological and geochemical investigation of mafic rocks embedded within the voluminous Triassic June Complex of the central Sanandaj-Sirjan zone (Iran), which are crucial to reconstruct the geodynamics of the Neotethyan passive margin. The Triassic mafic rocks are alkaline to sub-alkaline basalts, containing 43.36-49.09 wt% SiO 2 , 5.19-20.61 wt% MgO and 0.66-4.59 wt% total alkalis. Based on MgO concentrations, the mafic rocks fall into two groups: cumulates (Mg# = 51.61-58.94) and isotropic basaltic liquids (Mg# = 24.54-42.66). In all samples, the chondrite-normalized REE patterns show enrichment of light REEs with variable (La/Yb) N ratios ranging from 2.48 to 9.00, which confirm their amalgamated OIB-like and E-MORB-like signatures. Enrichment in large-ion lithophile elements and depletion in high field strength elements (HFSE) relative to the primitive mantle further support this interpretation. No samples point to crustal contamination, all having undergone fractionation of olivine ? clinopyroxene ? plagioclase. Nevertheless, elemental data suggest that the substantial variations in (La/Sm) PM and Zr/Nb ratios can be explained by variable degrees of partial melting rather than fractional crystallization from a common parental magma. The high (Nb/Yb) PM ratio in the alkaline mafic rocks points to the mixing of magmas from enriched and depleted mantle sources. Abundant OIB alkaline basalts and rare E-MORB appear to be linked to the drifting stage on the northern passive margin of the Neotethys Ocean.

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“…The Alpine Mediterranean mountain system results from subduction and partial obduction of former Mesozoic ocean basins during the collision of Africa, Europe and a number of smaller intervening microplates (Dewey et al 1973;Boccaletti et al 1974;Stampfli et al 1991;Ricou 1994). One of the major remaining questions on this mountain system concerns the Balkan region where north-to east-(eastern Alps, Carpathians) and south-to west-vergent (Dinarides, Hellenides) belts merge and diverge around continental fragments (Burchfiel 1980) previously considered to be ancient microcontinents (Kober 1928) trapped within the Alpine orogenic belt (Fig.…”

Section: Introductionmentioning

confidence: 99%

Thermotectonic evolution of an extensional dome: the Cenozoic Osogovo?Lisets core complex (Kraishte zone, western Bulgaria)

Kounov

Seward

Bernoulli

et al. 2004

Int J Earth Sci (Geol Rundsch)

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The Kraishte region of Bulgaria is located at the junction of the Balkanides and Hellenides-Dinarides tectonic belts. Fission-track analysis on both apatites and zircons documents the Cenozoic exhumation of a Precambrian basement bounded by low-angle detachments. Late Eocene-Oligocene extension began prior to 47 Ma and was dominantly in a top-to-the-southwest direction, confirmed by the sense of younging of apatite and zircon ages. This crustal extension controlled the formation of half-graben sedimentary basins on the hanging walls of the detachments. Thermal modelling of these hanging wall units provides evidence for heat transfer across the detachments from a relatively warm rising footwall. From 32 to 29 Ma, pervasive magmatic activity resulted in the emplacement of rhyolitic to dacitic subvolcanic bodies and dykes, along with intrusion of the Osogovo granite. The results give evidence for extension in the southern Balkan older than, and separated from, the Miocene to Quaternary Aegean extension. This might reflect transtension during northeastward extrusion and rotation of continental fragments around the western boundary of Moesia. Eocene-Oligocene extension seems to have been controlled by the distribution of earlier thickening all around the Carpatho-Balkanic orocline, which is reflected by the Cretaceous emplacement of the Morava Nappe in the Kraishte.

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Tethyan margins in space and time

Cited by 414 publications

References 57 publications

Organization of pre-Variscan basement areas at the north-Gondwanan margin

Organization of pre-Variscan basement areas at the north-Gondwanan margin

Tectonic significance of Triassic mafic rocks in the June Complex, Sanandaj–Sirjan zone, Iran

Thermotectonic evolution of an extensional dome: the Cenozoic Osogovo?Lisets core complex (Kraishte zone, western Bulgaria)

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