Geochronology and geochemistry of basalts from the Karamay ophiolitic melange in West Junggar (NW China): Implications for Devonian-Carboniferous intra-oceanic accretionary tectonics of the southern Altaids

Yang, Gaoxue; Li, Yongjun; Santosh, M.; Yang, Baofeng; Zhang, Bing; Tong, Lili

doi:10.1130/b30650.1

Cited by 111 publications

(57 citation statements)

References 75 publications

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“…The MTDKZD ophiolite belt consists of 572-488 Ma Mayile ophiolitic mélanges Xu et al, 2012), 531-523 Ma Tangbale ophiolitic mélanges (Kwon et al, 1989;Jian et al, 2005) and 423-375 Ma Darbute ophiolite belt and Karamay ophiolitic mélanges in the West Junggar area Gu et al, 2009;Yang et al, 2012cYang et al, , 2013He et al, 2013b), and 417-373 Ma Kalamaili ophiolite belt in the East Junggar (Jian et al, 2005;Tang et al, 2007b;Huang et al, 2012). Occurrences of ophiolitic mélanges in the Barkol-Yiwu area in the eastern segment are only few, excepting an ultramafic-mafic complex in the Daheishan area (Fig.…”

Section: Paleozoic Tectonic Settingmentioning

confidence: 96%

“…6h). Both Gan et al, 2010;(9) Geng et al, 2009;(10) Geng et al, 2011;(11) Gu et al, 2009;(12) Han et al, 2006;(13) Han et al, 2010;(15) He et al, 2013b;(16) Huang et al, 2012;(17) Jian et al, 2005;(18) Kwon et al, 1989;(19) Li et al, 2007;(20) Lin et al, 2007;(21) Liu et al, 2005;(22) Mao et al, 2008;(23) Shen et al, 2011;(24) Su et al, 2006;(25) Su et al, 2008;(26) Su et al, 2012;(27) Tang et al, 2007;(28) Tang Yang et al, 2013;(42) Yang et al, 2009a;(43) Yang et al, 2009b;(44) Yang et al, 2012e;(45) Zhang et al, 2013;(46) Zhu et al, 2013;and (47) Tang et al, 2007. the phenocryst and groundmass oligoclase are strongly sericitized. The phenocryst quartz is ...…”

Section: Geology Of the Zhifang Ophiolitic Mélangesmentioning

confidence: 96%

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Spatial–temporal framework for the closure of the Junggar Ocean in central Asia: New SIMS zircon U–Pb ages of the ophiolitic mélange and collisional igneous rocks in the Zhifang area, East Junggar

Jiang

et al. 2015

Journal of Asian Earth Sciences

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Section: Paleozoic Tectonic Settingmentioning

confidence: 96%

Section: Geology Of the Zhifang Ophiolitic Mélangesmentioning

confidence: 96%

Spatial–temporal framework for the closure of the Junggar Ocean in central Asia: New SIMS zircon U–Pb ages of the ophiolitic mélange and collisional igneous rocks in the Zhifang area, East Junggar

Jiang

et al. 2015

Journal of Asian Earth Sciences

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“…Moreover, Hirano et al (2006) proposed that the small alkaline volcanoes erupt along lithospheric fractures in response to plate flexure White and Duncan (1996), Louisville from Vanderkluysen et al (2014), OIB and MORB compositions are from Sun and McDonough (1989). during subduction. In our previous studies we discussed the occurrences of alkaline basalts hosted by ophiolitic mélanges in the West Junggar and suggested that the plume-related magmatism developed during the evolution of the Junggar ocean as well as paleo-Asian Ocean (Yang et al, 2012b(Yang et al, , 2013(Yang et al, , 2015. Safonova and Santosh (2014) also considered that the OIB-bearing units of the CAOB and the Western Pacific formed in relation to two superplumes: the Asian with age of the Late Neoproterozoic and the Pacific with age of the Cretaceous.…”

Section: Petrogenesis Of Basaltsmentioning

confidence: 99%

“…generally continuous during the development of the paleo-Asian Ocean (Yang et al, 2013(Yang et al, , 2015. During the closure of the paleo-Asian Ocean, relict fragments of oceanic crust and seamounts were preserved as 'ophiolites' in the CAOB accretionary complexes.…”

Section: Geodynamic Implications For the Central Asian Orogenic Beltmentioning

confidence: 99%

“…The vast accretionary complexes of the CAOB contain a significant proportion of more-enriched basalts (Yang et al, 2015), similar in composition to modern-day ocean island basalts (OIB). On the basis of their geochemistry and nature of associated sediments many of these enriched basalts have been interpreted as the accreted remnants of seamounts (e.g., Safonova and Santosh, 2014;Yang et al, 2012aYang et al, , 2012bYang et al, , 2013Yang et al, , 2015. However, since accreted seamounts generally get caught up in ophiolitic mélange belts they have undergone intense deformation, so can easily be misinterpreted as "classic" ophiolitic units (cf.…”

Section: Introductionmentioning

confidence: 99%

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Accreted seamounts in North Tianshan, NW China: Implications for the evolution of the Central Asian Orogenic Belt

Yang

Kerr

et al. 2018

Journal of Asian Earth Sciences

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A B S T R A C T The Carboniferous Bayingou ophiolitic mélange is exposed in the North Tianshan accretionary complex in the southwestern part of the Central Asian Orogenic Belt (CAOB). The mélange is mainly composed of serpentinised ultramafic rocks (including harzburgite, lherzolite, pyroxenite, dunite and peridotite), pillowed and massive basalts, layered gabbros, radiolarian cherts, pelagic limestones, breccias and tuffs, and displays blockin-matrix structures. The blocks of ultramafic rocks, gabbros, basalts, cherts, and limestones are set in a matrix of serpentinised ultramafic rocks, massive basalts and tuffs. The basaltic rocks in the mélange show significant geochemical heterogeneity, and two compositional groups, one ocean island basalt-like, and the other mid-ocean ridge-like, can be distinguished on the basis of their isotopic compositions and immobile trace element contents (such as light rare earth element enrichment in the former, but depletion in the latter). The more-enriched basaltic rocks are interpreted as remnants/fragments of seamounts, derived from a deep mantle reservoir with low degrees (2-3%) of garnet lherzolite mantle melting. The depleted basalts most likely formed by melting of a shallower spinel lherzolite mantle source with ∼15% partial melting. It is probable that both groups owe their origin to melting of a mixture between plume and depleted MORB mantle. The results from this study, when integrated with previous work, indicate that the Junggar Ocean crust (comprising a significant number of seamounts) was likely to have been subducted southward beneath the Yili-Central Tianshan block in the Late Devonian-Early Carboniferous. The seamounts were scraped-off and accreted along with the oceanic crust in an accretionary wedge to form the Bayingou ophiolitic mélange. We present a model for the tectonomagmatic evolution of this portion of the CAOB involving prolonged intra-oceanic subduction with seamount accretion

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Closure Time of the Junggar‐Balkhash Ocean: Constraints From Late Paleozoic Volcano‐Sedimentary Sequences in the Barleik Mountains, West Junggar, NW China

et al. 2017

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The Junggar‐Balkhash Ocean was a major branch of the southern Paleo‐Asian Ocean. The timing of its closure is important for understanding the history of the Central Asian Orogenic Belt. New sedimentological and geochronological data from the Late Paleozoic volcano‐sedimentary sequences in the Barleik Mountains of West Junggar, NW China, help to constrain the closure time of the Junggar‐Balkhash Ocean. Tielieketi Formation (Fm) is dominated by littoral sediments, but its upper glauconite‐bearing sandstone is interpreted to deposit rapidly in a shallow‐water shelf setting. By contrast, Heishantou Fm consists chiefly of volcanic rocks, conformably overlying or in fault contact with Tielieketi Fm. Molaoba Fm is composed of parallel‐stratified fine sandstone and sandy conglomerate with graded bedding, typical of nonmarine, fluvial deposition. This formation unconformably overlies the Tielieketi and Heishantou formations and is conformably covered by Kalagang Fm characterized by a continental bimodal volcanic association. The youngest U‐Pb ages of detrital zircons from sandstones and zircon U‐Pb ages from volcanic rocks suggest that the Tielieketi, Heishantou, Molaoba, and Kalagang formations were deposited during the Famennian‐Tournaisian, Tournaisian‐early Bashkirian, Gzhelian, and Asselian‐Sakmarian, respectively. The absence of upper Bashkirian to Kasimovian was likely caused by tectonic uplifting of the West Junggar terrane. This is compatible with the occurrence of coeval stitching plutons in the West Junggar and adjacent areas. The Junggar‐Balkhash Ocean should be finally closed before the Gzhelian, slightly later or concurrent with that of other ocean domains of the southern Paleo‐Asian Ocean.

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Geochronology and geochemistry of basalts from the Karamay ophiolitic melange in West Junggar (NW China): Implications for Devonian-Carboniferous intra-oceanic accretionary tectonics of the southern Altaids

Cited by 111 publications

References 75 publications

Spatial–temporal framework for the closure of the Junggar Ocean in central Asia: New SIMS zircon U–Pb ages of the ophiolitic mélange and collisional igneous rocks in the Zhifang area, East Junggar

Spatial–temporal framework for the closure of the Junggar Ocean in central Asia: New SIMS zircon U–Pb ages of the ophiolitic mélange and collisional igneous rocks in the Zhifang area, East Junggar

Accreted seamounts in North Tianshan, NW China: Implications for the evolution of the Central Asian Orogenic Belt

Closure Time of the Junggar‐Balkhash Ocean: Constraints From Late Paleozoic Volcano‐Sedimentary Sequences in the Barleik Mountains, West Junggar, NW China

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