Hercynian post-collisional magmatism in the context of Paleozoic magmatic evolution of the Tien Shan orogenic belt

Seltmann, Reimar; Konopelko, Dmitry; Biske, Georgy; Диваев, Ф. К.; Сергеев, С. А.

doi:10.1016/j.jseaes.2010.08.016

Cited by 267 publications

(183 citation statements)

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“…Traditionally, the western Tien Shan (post-Soviet states) is divided into three tectonic units: the North Tien Shan (NTS), Middle Tien Shan (MTS) and South Tien Shan (STS) units (e.g. Biske et al, 2013;De Grave et al, 2012Glorie et al, 2010Glorie et al, , 2011bSeltmann et al, 2011) (Fig. 2).…”

Section: Geological Settingmentioning

confidence: 99%

“…3). The MTS basement is mainly composed of Precambrian crust, covered with early-middle Paleozoic sediments and intercalations of late Paleozoic granitoids (De Grave et al, 2013;Konopelko et al, 2007;Seltmann et al, 2011). The STS represents a late Paleozoic accretionary complex, related to the collision of paleo-Kazakhstan with Tarim during the late Paleozoic (Glorie et et al, 2011).…”

Section: Geological Settingmentioning

confidence: 99%

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Late-Paleozoic emplacement and Meso-Cenozoic reactivation of the southern Kazakhstan granitoid basement

et al. 2015

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International audienceThe Ili-Balkhash Basin in southeastern Kazakhstan is located at the junction of the actively deforming mountain ranges of western Junggar and the Tien Shan, and is therefore part of the southwestern Central Asian Orogenic Belt. The basement of the Ili-Balkhash area consists of an assemblage of mainly Precambrian microcontinental fragments, magmatic arcs and accretionary complexes. Eight magmatic basement samples (granitoids and tuffs) from the Ili-Balkhash area were dated with zircon U-Pb LA-ICP-MS and yield Carboniferous to late Permian (~ 350-260 Ma) crystallization ages. These ages are interpreted as reflecting the transition from subduction to (post-) collisional magmatism, related to the closure of the Junggar-Balkhash Ocean during the Carboniferous – early Permian and hence, to the final late Paleozoic accretion history of the ancestral Central Asian Orogenic Belt. Apatite fission track (AFT) dating of 14 basement samples (gneiss, granitoids and volcanic tuffs) mainly provides Cretaceous cooling ages. Thermal history modeling based on the AFT data reveals that several intracontinental tectonic reactivation episodes affected the studied basement during the late Mesozoic and Cenozoic. Late Mesozoic reactivation and associated basement exhumation is interpreted as distant effects of the Cimmerian collisions at the southern Eurasian margin and possibly of the Mongol-Okhotsk Orogeny in SE Siberia during the Jurassic – Cretaceous. Following tectonic stability during the Palaeogene, inherited basement structures were reactivated during the Neogene (constrained by Miocene AFT ages of ~ 17–10 Ma). This late Cenozoic reactivation is interpreted as the far-field response of the India-Eurasia collision and reflects the onset of modern mountain building and denudation in southeast Kazakhstan, which seems to be at least partially controlled by the inherited basement architecture

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Late-Paleozoic emplacement and Meso-Cenozoic reactivation of the southern Kazakhstan granitoid basement

et al. 2015

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“…The South Tien Shan, separated from the Middle Tien Shan by the South Tien Shan Suture (¼Turkestan Suture, characterized by Early Ordovician -Early Carboniferous ophiolites; Kurenkov & Aristov 1995;Gao et al 1998;Chen et al 1999), is a Late Palaeozoic-age, fold-and-thrust belt formed during the closure of the Turkestan Ocean (¼Central Tien Shan Ocean; Zonenshain et al 1990;Kheraskova et al 2010;Seltmann et al 2011;McCann et al 2013). The direction of subduction vergence of the Central Tien Shan Ocean is uncertain, and both northerly directed (e.g.…”

mentioning

confidence: 99%

“…In its western part, the South Tien Shan can be subdivided into several units from west to east (Konopelko et al 2007(Konopelko et al , 2017: the Kyzylkum, Gissar, and Alai (¼Alay) segments west of the Talas -Fergana Fault; and the Kokshal segment to the east. Lithologically they are all similar, comprising Ordovician -mid-Carboniferous pelagic sediments, partly associated with intraplate volcanics, and thick carbonate platforms (mainly Late Devonian -Early Carboniferous in age) which are best developed in the latter two segments (Biske & Seltmann 2010;Seltmann et al 2011). Post-collisional intrusions east and west of the Talas -Fergana Fault are dated as Early Permian (e.g.…”

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Geological evolution of Central Asian Basins and the western Tien Shan Range

Brunet

Sobel

McCann³

2017

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The geological evolution of Central Asia commenced with the evolution of a complex Precambrian–Palaeozoic orogen. Cimmerian blocks were then accreted to the southern margin during the Mesozoic, leading to tectonic reactivation of older structures and discrete episodes of basin formation. The Indian and Arabian blocks collided with Asia during the Cenozoic, leading to renewed structural reactivation, intracontinental deformation and basin development. This complex evolution resulted in the present-day setting of an elongated Tien Shan range flanked by large Mesozoic–Cenozoic sedimentary basins with smaller intramontane basins distributed within the range. The aim of this volume is to present multidisciplinary results and reviews from research groups in Europe and Central Asia that focus on the western part of the Tien Shan and some of the large sedimentary basins in that area. These works elucidate the Late Palaeozoic–Cenozoic tectono-sedimentary evolution of the area. Emphasis is placed on the collision of terranes and/or continents and the ensuing fault reactivation; the impact of changes in climate on the sedimentation is also examined.

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Cenozoic deformation and exhumation history of the Central Kyrgyz Tien Shan

et al. 2014

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New low-temperature thermochronological data from 80 samples in eastern Kyrgyzstan are combined with previously published data from 61 samples to constrain exhumation in a number of mountain ranges in the Central Kyrgyz Tien Shan. All sampled ranges are found to have a broadly consistent Cenozoic exhumation history, characterized by initially low cooling rates (<1°C/Myr) followed by a series of increases in exhumation that occurred diachronously across the region in the late Cenozoic that are interpreted to record the onset of deformation in different mountain ranges. Combined with geological estimates for the onset of proximal deformation, our data suggest that the Central Kyrgyz Tien Shan started deforming in the late Oligocene-early Miocene, leading to the development of several, widely spaced mountain ranges separated by large intermontane basins. Subsequently, more ranges have been constructed in response to significant shortening increases across the Central Kyrgyz Tien Shan, notably in the late Miocene. The order of range construction is interpreted to reflect variations in the susceptibility of inherited structures to reactivation. Reactivated structures are also shown to have significance along strike variations in fault vergence and displacement, which have influenced the development and growth of individual mountain ranges. Moreover, the timing of deformation allows the former extent of many intermontane basins that have since been partitioned to be inferred; this can be linked to the highly time-transgressive onset of late Cenozoic coarse clastic sedimentation.

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Hercynian post-collisional magmatism in the context of Paleozoic magmatic evolution of the Tien Shan orogenic belt

Cited by 267 publications

References 29 publications

Late-Paleozoic emplacement and Meso-Cenozoic reactivation of the southern Kazakhstan granitoid basement

Late-Paleozoic emplacement and Meso-Cenozoic reactivation of the southern Kazakhstan granitoid basement

Geological evolution of Central Asian Basins and the western Tien Shan Range

Cenozoic deformation and exhumation history of the Central Kyrgyz Tien Shan

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