Volcanic belts as markers of the Mesozoic-Cenozoic active margin of Eurasia

Kazmin, V. G.; Sbortshikov, I.M.; Ricou, Luc-Emmanuel; Zonenshain, Lev P.; Boulin, J.; Knipper, A. L.

doi:10.1016/0040-1951(86)90195-2

Cited by 160 publications

(67 citation statements)

References 22 publications

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“…The present fission-track data confirm that the lithological units mapped by correspond to separate intrusions emplaced at different crustal levels in two major episodes: early Cretaceous and Palaeocene-Eocene. The early Cretaceous age is consistent with published data proposing a Jurassic and even earlier onset of arc magmatism in the eastern Pontides (Adamia et al 1977;Kazmin et al 1986). Zankl (1962) and Okay (1993) also reported early Cretaceous basaltic rocks in the eastern Pontides.…”

Section: Regional Geodynamic Significancesupporting

confidence: 90%

“…Zankl (1962) and Okay (1993) also reported early Cretaceous basaltic rocks in the eastern Pontides. The early Cretaceous Ç amlıkaya granitoid can be seen as part of pre-Turonian/Cenomanian arc magmatism and a western extension of the Caucasian region (Adamia et al 1977;Kazmin et al 1986). In view of its petrological and geochemical characteristics, it is proposed that the Ç amlıkaya unit is derived from arc magmatism induced by the northward subduction of the _ IzmirAnkara ocean beneath the Eurasian plate.…”

Section: Regional Geodynamic Significancementioning

confidence: 98%

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Titanite and zircon fission-track dating resolves successive igneous episodes in the formation of the composite Kaçkar batholith in the Turkish eastern Pontides

Boztuğ

Jonckheere

Wagner

et al. 2006

Int J Earth Sci (Geol Rundsch)

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The Kaçkar batholith in the Turkish eastern Pontides comprises several intrusive units with distinctive textural, mineralogical and geochemical characteristics. Their titanite and zircon fission-track ages confirm that the different lithodem units result from consecutive igneous episodes, establish their emplacement sequence and, together with geochemical data, help to relate them to their geodynamic context. The Ç amlıkaya granitoid (112.4 ± 1.6 Ma) was emplaced during an immature-arc magmatic episode of early Cretaceous age. The Sırtyayla (57.1 ± 1.2 Ma) and Marselevat (52.9 ± 1.3 Ma) granitoids are late products of a late-Palaeocene mature-arc episode. The Ayder granitoid (46.4 ± 1.0 Ma) is the result of middle-to late-Eocene post-collisional magmatism related to slab break-off. The Halkalıtas¸quartz diorite (43.7 ± 2.3 Ma) and the Gü llü bag monzonite (38.1 ± 0.9 Ma) document a middle-to late-Eocene episode related to post-collisional extension. The data reveal the advantages of dense sampling, spanning a maximum range of elevations. Apart from the increased precision on the mean, redundant sampling allows to shift the basis for interpretation from a priori assumptions to a posteriori numerical criteria when using geochronometers with low to moderate closure temperatures, including apatite, titanite and zircon fission-tracks but also K-Ar (Ar-Ar) biotite, muscovite and K-feldspar.

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Section: Regional Geodynamic Significancesupporting

confidence: 90%

Section: Regional Geodynamic Significancementioning

confidence: 98%

Titanite and zircon fission-track dating resolves successive igneous episodes in the formation of the composite Kaçkar batholith in the Turkish eastern Pontides

Boztuğ

Jonckheere

Wagner

et al. 2006

Int J Earth Sci (Geol Rundsch)

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“…For the first time in Cenozoic history, volcanic belts can be traced continuously from the Rhodope massif to Afghanistan, via the southern Caspian Sea coast (Kazmin et al 1986). Despite this intensive calc-alkaline volcanism to the south of the studied area, no volcanoclastic components were observed throughout the sedimentary column at Aktumsuk and Kaurtakapy.…”

Section: Significance Of Clay Mineralsmentioning

confidence: 98%

The Paleocene-Eocene transition in the marginal northeastern Tethys (Kazakhstan and Uzbekistan)

Bolle¹,

Pardo

Hinrichs

et al. 2000

International Journal of Earth Sciences

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“…The Late-Jurassic igneous activity can be related to the subduction of an ocean located to the north of the main Tethys Ocean. Jurassic magmatic activity is also recorded eastward in the Pontides-Caucasus magmatic arc (Robertson and Dixon 1984;Dercourt et al 1986;Kazim et al 1986;Sengör et al 1993).…”

Section: Jurassic Granitoidsmentioning

confidence: 99%

Characterisation of igneous terranes by zircon dating: implications for UHP occurrences and suture identification in the Central Rhodope, northern Greece

Turpaud

Reischmann

2009

Int J Earth Sci (Geol Rundsch)

103

156

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The occurrence of ultra high pressure (UHP) and high pressure (HP) relicts associated with oceanic material suggests the presence of a suture zone within the Rhodope Massif. Characterisation of the accreted igneous terranes and their relationship with the UHP/eclogite occurrences provide new constraints on the location of this suture. Single-zircon evaporation and sensitive high-resolution ion microprobe dating of orthogneiss protoliths define two groups of intrusion ages: Permo-Carboniferous and Late Jurassic-Early Cretaceous. Structurally, the Late Jurassic gneissic complex overthrust a unit with PermoCarboniferous orthogneisses. A ''melange zone'' marked by mylonites, eclogites, amphibolites, and UHP micaschists separates these two units. We interpret these observations in terms of two distinct igneous terranes, the Thracia (PermoCarboniferous) and Rhodope (Late Jurassic) terranes, separated by the Nestos suture, and assembled during the closure of an oceanic basin of the Tethys. Geochemically, the Late-Jurassic rocks are akin to subduction magmatism, possibly the same subduction that caused the UHP metamorphism of metasediments within the ''melange zone''. Observed UHP-HP relicts are restricted to the tectonic contact zone, suggesting that a single subduction/collison event can explain the occurrences of UHP relicts and eclogites in the Central Rhodope, and that subducted rocks are exhumed only within the Nestos suture.

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Volcanic belts as markers of the Mesozoic-Cenozoic active margin of Eurasia

Cited by 160 publications

References 22 publications

Titanite and zircon fission-track dating resolves successive igneous episodes in the formation of the composite Kaçkar batholith in the Turkish eastern Pontides

Titanite and zircon fission-track dating resolves successive igneous episodes in the formation of the composite Kaçkar batholith in the Turkish eastern Pontides

The Paleocene-Eocene transition in the marginal northeastern Tethys (Kazakhstan and Uzbekistan)

Characterisation of igneous terranes by zircon dating: implications for UHP occurrences and suture identification in the Central Rhodope, northern Greece

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