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

Xu, Xing; Jiang, Neng; Li, Xian‐Hua; Wu, Chu; Qu, Xun; Zhou, Gang; Dong, Lingqing

doi:10.1016/j.jseaes.2015.06.017

Cited by 70 publications

(42 citation statements)

References 129 publications

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“…Most of the granite in the NTS region was intruded during the Carboniferous to Permian (e.g. Sun et al, ; Xu et al, ), and the only Triassic granite occurs in the Harlik mountains, as reported by Greene, Carroll, Wartes, Graham, and Wooden () (Figure ).…”

Section: Geological Settingmentioning

confidence: 76%

“…The Bogda mountains mainly consist of Carboniferous to Permian calcalkaline volcanic rocks (Chen, Shu, Santosh, & Zhao, ; Gao et al, , ; Jin, Liu, Zhu, & Zhao, ; Shu et al, ; Tang et al, ; Wang, Wu, et al, ; Wartes, Carroll, & Greene, ; Zhang, Li, Nie, Tian, & Shi, ). Ordovician‐Carboniferous volcanics are widely distributed in the Harlik mountains (Sun et al, ; Xu et al, ; Ma, Shu, & Meert, ) (Figure ). Middle Jurassic (ca.…”

Section: Geological Settingmentioning

confidence: 99%

“…This age group probably indicates the erosion of a source area containing zircon grains with Early Triassic ages. In the NTS, Early Triassic (252–229 Ma) igneous intrusions were reported in the Harlik mountains, north‐east of the Turpan‐Hami basin (Greene et al, ; Xu et al, ), as well as in the eastern CTS (246–233 Ma) to the south (Li et al, ; Zhang et al, ). Some early Mesozoic granitoids (246–233 Ma) also occur in the Beishan area and in central Inner Mongolia, which are located far to the east (see Wang, Tong, et al () for a review).…”

Section: Interpretation Of Provenance Changesmentioning

confidence: 99%

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Detrital zircon geochronology analysis of the Late Mesozoic deposition in the Turpan‐Hami basin: Implications for the uplift history of the Eastern Tian Shan, north‐western China

et al. 2019

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Analysing the provenance changes of synorogenic sediments in the Turpan‐Hami basin by detrital zircon geochronology is an efficient tool to examine the uplift and erosion history of the easternmost Tian Shan. We present detrital zircon U‐Pb analysis from nine samples that were collected within marginal lacustrine Middle‐Late Jurassic and aeolian‐fluvial Early Cretaceous strata in the basin. Middle‐Early Jurassic (159–172 Ma) zircons deriving from the southern Junggar dominated the Middle Jurassic sample from the western Turpan‐Hami basin, whereas Permian‐Carboniferous (270–330 Ma) zircons from the Bogda mountains were dominant in the Late Jurassic to Early Cretaceous samples. Devonian‐Silurian (400–420 Ma) and Triassic (235–259 Ma) zircons from the Jueluotage and Harlik mountains constituted the subordinate age groups in the Late Jurassic and Early Cretaceous samples from the eastern basin respectively. These provenance transitions provide evidence for uplift of the Bogda mountains in the Late Jurassic and the Harlik mountains since the Early Cretaceous.

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Section: Geological Settingmentioning

confidence: 76%

Section: Geological Settingmentioning

confidence: 99%

Section: Interpretation Of Provenance Changesmentioning

confidence: 99%

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Detrital zircon geochronology analysis of the Late Mesozoic deposition in the Turpan‐Hami basin: Implications for the uplift history of the Eastern Tian Shan, north‐western China

et al. 2019

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“…The Zhaheba–Aermantai Fault divides the East Junggar Block into two small blocks, namely, the Dulate arc to the north and the Yemaquan arc to the south (Xiao et al, ; Xu, Jiang et al, ). The stratigraphic succession of the East Junggar Block comprises a Devonian to Early Carboniferous marine volcanic–sedimentary sequence, a Late Carboniferous to Permian continental volcanic–sedimentary sequence, Mesozoic coal‐bearing sedimentary rocks, and Cenozoic sediments (Xu, Li et al, ; Zhang et al, ).…”

Section: Geological Settingmentioning

confidence: 99%

Zircon U–Pb geochronology and geochemistry of Devonian plagiogranites in the Kuerti area of southern Chinese Altay, northwest China: Petrogenesis and tectonic evolution of late Paleozoic ophiolites

et al. 2017

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This study presents zircon U–Pb geochronology with major, trace, rare earth element and Sr–Nd isotope geochemistry for plagiogranite dyke swarms occurring within the gabbro unit of the lower part of the Kuerti ophiolite in southern Chinese Altay, Northwest China. These intrusive plagiogranites cut across the metamorphic zone consisting of amphibolites that are related to hydrothermal alteration and shearing of gabbros. LA‐ICP‐MS zircon U–Pb dating of 2 plagiogranite samples yields approximately 390 Ma age of origin. They are geochemically characterized by relatively high SiO2 and Na2O, low K2O, TiO2, and Al2O3 contents, with marked enrichment in light rare earth elements and depletion in Nb, Ta, and Ti. They have slightly higher initial 87Sr/86Sr ratios (0.7040 to 0.7049), lower εNd(t) values (+3.6 to +6.3), and higher Th contents (2.84–11.9 ppm) than those (0.7034 to 0.7048, +7.2 to +10.3, and 0.04 to 1.79) of closely associated amphibolites. Geological and geochemical attributes suggest that the plagiogranites were generated by the anatexis of hydrated and hydrothermally altered amphibolites and minor sediments from oceanic crust during shearing at low pressure (<0.1 GPa) and temperature (<850 °C) conditions in a suprasubduction zone setting. The ridge subduction at approximately 390 Ma caused the upwelling of the hot asthenosphere and triggered the spreading of the Kuerti back‐arc basin, followed by the formation of the plagiogranites in the Kuerti ophiolite.

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“…The asynchronous subduction or scissors‐type closure contributed to the various geodynamic settings during the Late Palaeozoic and also prolonged the subduction and accretionary process. The geodynamic evolution of the Keramaili oceanic basin not only resulted in a diachronous Carboniferous strata from east to west in the Junggar area (S. Han et al, ; D. Li et al, ; Su et al, ; Xu et al, ), but also indicates that subduction of the Paleo‐Asian oceanic basin and the accretion‐collision of multi‐island arcs was the dominant geodynamic process during the Late Palaeozoic.…”

Section: Discussionmentioning

confidence: 99%

Geochemistry, Petrology, and U–Pb dating of high‐K volcanic rocks in wells WC‐1 and Y‐2 from the northern Junggar Basin, northwestern China: Implications for the closure of the Keramaili oceanic basin during the Carboniferous

et al. 2018

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Carboniferous volcanic rocks are widely distributed in the Junggar Basin and may provide a unique insight into the tectonic history of this basin. In this paper, we focus on the tectonic evolution of the northern Junggar Basin (NJB) using geochronological and geochemical data to establish the diachronous closure model for the Keramaili oceanic basin. The Lower Carboniferous strata in the eastern part (well WC‐1) and the Upper Carboniferous strata in the western part (well Y‐2) of the NJB are composed of a mix of compositional and rock‐type forms. These volcanic rocks are mostly high‐K assemblages characterized by high K (1.73–6.48%), high alkali (Na2O + K2O = 5.04–7.45%), and low TiO2 (0.57–1.06%). They also exhibit various REE concentrations (68.44–168.19 ppm), an enrichment of LREE (LaN/YbN = 4.54–8.09), and small negative Eu anomalies (δEu = 0.74–0.90). The depletion of HFSE and relevant tectonic setting discrimination diagrams demonstrate that these two volcanic associations were formed in a subduction‐related environment. The data also indicate that the high‐K volcanic rocks are derived from a mix of melted subducted sediments and mantle metasomatized by silica‐rich fluids. Although these two sets of volcanic rocks formed in Early and Late Carboniferous, the similar petrographic and geochemical natures suggest similar magma source and tectonic setting. Along with different regional tectonic settings in the NJB during the Carboniferous, we propose an asynchronous subduction of Keramaili oceanic basin, resulting in the inconsistent temporal and spatial distribution of Upper Carboniferous volcanic rocks in the NJB.

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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

Cited by 70 publications

References 129 publications

Detrital zircon geochronology analysis of the Late Mesozoic deposition in the Turpan‐Hami basin: Implications for the uplift history of the Eastern Tian Shan, north‐western China

Detrital zircon geochronology analysis of the Late Mesozoic deposition in the Turpan‐Hami basin: Implications for the uplift history of the Eastern Tian Shan, north‐western China

Zircon U–Pb geochronology and geochemistry of Devonian plagiogranites in the Kuerti area of southern Chinese Altay, northwest China: Petrogenesis and tectonic evolution of late Paleozoic ophiolites

Geochemistry, Petrology, and U–Pb dating of high‐K volcanic rocks in wells WC‐1 and Y‐2 from the northern Junggar Basin, northwestern China: Implications for the closure of the Keramaili oceanic basin during the Carboniferous

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