Zircon U-Pb age, geochemistry and geological implications of granitoids in Tuerkubantao, Xinjiang

Shi, Yu; Wang, Yuwang; Wang, Jingbin; Lijuan, Wang; Ding, Ronggui; Chen, Yanfei

doi:10.1007/s12583-013-0360-z

Cited by 4 publications

(4 citation statements)

References 25 publications

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“…The Saur Arc formed by northward subduction, which was an opposite polarity to that of the Chingiz Arc (Chen et al, 2017a(Chen et al, , 2017b. The Chingiz Arc formed in the period 410-430 Ma (Shen et al, 2012), whereas the Saur Arc was active only from 370 Ma (Shi et al, 2013;Wang et al, 2012) to the late Carboniferous. Clearly, the temporal and spatial evolution of the Saur and Chingiz arcs was completely different.…”

Section: The Boundary Between the Chingiz And Saur Arcsmentioning

confidence: 98%

Late Paleozoic Chingiz and Saur Arc Amalgamation in West Junggar (NW China): Implications for Accretionary Tectonics in the Southern Altaids

et al. 2020

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The Saur‐Chingiz Belt (SCB) in northern West Junggar is regarded as the amalgamation zone of the Saur and Chingiz arcs. It contains diagnostic rocks of accretionary origin, providing critical information about the evolution of the southern Paleo‐Asian Ocean. We recognize various lithologies in the SCB, including an ophiolitic mélange, turbidites, conglomerates, rhyolites, breccias, and diorites, and investigate the structures of the Hebukesaier ophiolitic mélange. Kinematic analysis indicates top‐to‐the‐N thrusting. A coarse‐grained gabbro (ca. 490 Ma) and a fine‐grained gabbro (ca. 318 Ma) have normal mid‐ocean ridge basalt (N‐MORB)‐type geochemical signatures, and three groups of pillow basalts exhibit N‐MORB, enriched mid‐ocean ridge basalt (E‐MORB), and ocean island basalts (OIB) fingerprints, respectively. Detrital zircons in tuffs, conglomerates, and turbidites associated with the Hebukesaier mélange display predominant ages of 410–440 Ma, which are consistent with the age of the Chingiz Arc. This suggests that the mafic rocks (ophiolitic components) in the Hebukesaier mélange were generated at a mid‐ocean ridge and were later accreted to the Chingiz Arc, which formed above a southward‐dipping subduction zone that consumed the Paleo‐Asian Ocean. The predominant zircon age peaks of turbidites from the Saur area, north of the Hebukesaier mélange, range from 326 to 360 Ma, which areconsistent with a provenance from the Saur Arc. The distinctive detrital zircons of the Chingiz and Saur arcs indicate that the northern boundary of the Hebukesaier mélange is the tectonic boundary between the Chingiz and Saur arcs. We suggest that Paleo‐Asian Ocean closed before Late Triassic as indicated by a diorite vein (ca. 218 Ma) that intruded the Hebukesaier mélange.

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Section: The Boundary Between the Chingiz And Saur Arcsmentioning

confidence: 98%

Late Paleozoic Chingiz and Saur Arc Amalgamation in West Junggar (NW China): Implications for Accretionary Tectonics in the Southern Altaids

et al. 2020

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“…9c). High-K calc-alkaline Devonian granitoids in the Shaerbulake Terrane were interpreted to be generated in a subduction-related setting (Shi et al, 2013). Because high-K calc-alkaline rocks cannot be formed in island-arc setting, we proposed the Devonian granitoids were formed along an active continental margin.…”

Section: Tectonic Implicationsmentioning

confidence: 92%

Zircon U–Pb geochronology, geochemistry, and Sr–Nd isotopes of the Ural–Alaskan type Tuerkubantao mafic–ultramafic intrusion in southern Altai orogen, China: Petrogenesis and tectonic implications

Deng

Yuan

Zhou

et al. 2015

Journal of Asian Earth Sciences

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“…The lower sub‐formation is a thin‐bedded sandy slate intercalated with mudstone and chert, whereas the upper sub‐formation consists of siltstone intercalated with quartzite and limestone (Wang et al, 2012). The Palaeozoic plutons consist of granites with ages ranging from 415 to 356 Ma, which have the geochemical signature of volcanic arc granites (Shi et al, 2013; Sun et al, 2009; Yuan, Sun, Xiao, et al, 2007).…”

Section: Geological Settingmentioning

confidence: 99%

“…The location of the study is indicated, the ages of plutons and sediments are marked. 1 – Cai et al (2010); 2 – Cai, Sun, Yuan, Zhao, et al (2012)); 3 – Yuan et al (2006); 4 – Cai et al (2011a)); 5 – Shi et al (2013); 6 – Briggs et al (2007); 7 – Sun et al (2008); 8 – Sun et al (2009); 9 – Yuan, Sun, Xiao, et al (2007); 10 – Zhang et al (2006); 11 – Long et al (2007); 12 – Long et al (2010); 13 – Windley et al (2002); 14 – Dong et al (2018); 15 – He et al (2015); 16 – Jiang et al (2010); 17 – Jiang et al (2011); 18 – Wang et al (2006); 19 – Wang et al (2011); 20 – Wong et al (2010); 21 – Zeng, Chen, Wang, and Shan (2007); 22 – Zhang et al (2015); 23 – Sun et al (2018); 24 – Deng et al (2015); 25 – Zhao et al (2009)). The location of Figure 5 is marked [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

Growth of an accretionary complex in the southern Chinese Altai: Insights from the Palaeozoic Kekesentao ophiolitic mélange and surrounding turbidites

et al. 2020

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As a record of oceanic subduction, an accretionary complex plays a key role in the reconstruction of plate tectonic history. The Kekesentao ophiolitic mélange between the Chinese Altai orogen to the north and the Kazakhstan collage to the south played an important role in the subduction–accretion of the Chinese Altai in the Palaeozoic. This article provides new structural field relations, and petrographic, geochemical, and geochronologic data for the Kekesentao ophiolitic mélange, and detrital zircon analyses of turbidites that are imbricated with the mélange. The Kekesentao mélange consists of ultramafic rocks, meta‐gabbros, pillow basalts, cherts, and imbricated trench turbidites, tuffaceous sandstones and quartz schists (ocean plate stratigraphy). The mélange shows a ‘block in matrix’ structure in the field, and the general imbricated dip of the thrust system is to the N‐NE, indicating southward accretion. Pillow basalts and meta‐gabbros have a typical N‐MORB geochemical signature, and the U–Pb zircon age of a meta‐gabbro, interpreted as the age of pre‐subduction oceanic crust, is Early Devonian (399–393 Ma). The upper time limit of accretion of the mélange is constrained by a Late Devonian (361 Ma) intrusive granitic pluton. Detrital zircon ages of surrounding turbidites range from 369 to 3,114 Ma, which is typical of magmatic 540–460 Ma zircons from the Chinese Altai, suggesting that the Chinese Altai arc was the source of zircons in the mélange. The Kekesentao ophiolite was accreted to the accretionary complex before the Late Devonian. Our analysis of structures, ocean plate stratigraphy, and zircon isotopic provenance of the Kekesentao ophiolitic mélange and turbidites provides a robust conclusion that southward growth of the accretionary complex in the Kekesentao area of the Chinese Altai was semi‐continuous from the Early Palaeozoic to Devonian.

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Zircon U-Pb age, geochemistry and geological implications of granitoids in Tuerkubantao, Xinjiang

Cited by 4 publications

References 25 publications

Late Paleozoic Chingiz and Saur Arc Amalgamation in West Junggar (NW China): Implications for Accretionary Tectonics in the Southern Altaids

Late Paleozoic Chingiz and Saur Arc Amalgamation in West Junggar (NW China): Implications for Accretionary Tectonics in the Southern Altaids

Zircon U–Pb geochronology, geochemistry, and Sr–Nd isotopes of the Ural–Alaskan type Tuerkubantao mafic–ultramafic intrusion in southern Altai orogen, China: Petrogenesis and tectonic implications

Growth of an accretionary complex in the southern Chinese Altai: Insights from the Palaeozoic Kekesentao ophiolitic mélange and surrounding turbidites

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