Zircon U–Pb ages and tectonic implications of Paleozoic plutons in northern West Junggar, North Xinjiang, China

Chen, Jiafu; Han, Bo; Ji, Jianqing; Zhang, Lei; Zhao, Xu; He, Guojian; Wang, Tao

doi:10.1016/j.lithos.2009.11.014

Cited by 245 publications

(182 citation statements)

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“…The northern part of West Junggar, in Sawuer and Shaburt Mountains along the Kazakh border, consists of Devonian to Carboniferous volcanic-arc rocks, which unconformably overlie an Early Paleozoic accretionary complex (Fig. 3;Feng et al, 1989;Chen et al, 2009). The southern part of West Junggar Mountains consists of an association of Ordovician to Carboniferous ophiolitic mélanges and turbidite sequences Zhang et al, 1993).…”

Section: West Junggar Mountainsmentioning

confidence: 99%

Late Paleozoic paleogeographic reconstruction of Western Central Asia based upon paleomagnetic data and its geodynamic implications

Choulet

Chen

Wang

et al. 2011

Journal of Asian Earth Sciences

112

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Section: West Junggar Mountainsmentioning

confidence: 99%

Late Paleozoic paleogeographic reconstruction of Western Central Asia based upon paleomagnetic data and its geodynamic implications

Choulet

Chen

Wang

et al. 2011

Journal of Asian Earth Sciences

112

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“…Preliminary studies have shown that the late Carboniferous may be an important transition period for the tectonic regime in the Junggar area [4]. However, there are at least two opinions about the tectonic setting during this period; post-collisional extension [5,6] and intra-oceanic subduction [7][8][9].…”

mentioning

confidence: 99%

Zircon U-Pb and Hf isotopes of volcanic rocks from the Batamayineishan Formation in the eastern Junggar Basin

Zheng

Griffin

et al. 2010

Chin. Sci. Bull.

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An internal structural study was conducted to investigate U-Pb age, trace elements and Hf isotopes of basaltic zircons from the Batamayineishan Formation. The basalt was obtained from drill well San-Can 1 on the eastern Luliang uplift within the Junggar Basin. Trace element data of zircons show that all samples are magmatic, with similar REE patterns, including positive Ce (δCe=5.06-134), but negative Eu (δEu=0.06-0.55) anomalies and enrichment in heavy rare earth elements. Among 25 grains, the concordant ages were subdivided into three groups; ages of 300.4±1.3 Ma (n=11), 339.2±2.7 Ma (n=3) and 392.0±1.7 Ma (n=8). Three remaining grains were nearly concordant, with 206 Pb/ 238 U ages of 510±7, 488±6 and 453±6 Ma, respectively. The youngest concordant age (i.e., 300.4±1.3 Ma) could be interpreted as the formation age of the studied basaltic rock; this is consistent with the sampling position at the upper part of the Batamayineishan Formation. On the other hand, ages such as Ordovician and early Devonian are consistent with the ages of island-arc volcanic rocks (enrichment in Pb) or ophiolites around the basin. Moreover, the positive ε Hf (t) values of the early and middle Paleozoic zircons (+3.6-+10.5) may suggest that the basement traversed by the studied volcanic rocks may be Paleozoic in age, formed from the residual oceanic crust and island-arc complex. The ε Hf (t) values (+4.2-+17.1) of the late Paleozoic (~300.4 Ma) zircons suggest that the basaltic magmas were derived from partial melting of the asthenospheric mantle or depleted lithospheric mantle. These magmas were slightly contaminated by the existence of early-middle Paleozoic materials. The late Carboniferous basalts represent direct eruption of mantle-derived magmas at the upper crustal level during a post-collisional tectonic setting. We therefore consider that extensive vertical growth of the continental crust to have occurred before the late Carboniferous. Batamayineishan Formation, zircon U-Pb ages, Hf isotopes, continental crust growth, eastern Junggar Basin Citation:Su Y P, Zheng J P, Griffin W L, et al. Zircon U-Pb and Hf isotopes of volcanic rocks from the Batamayineishan Formation in the eastern Junggar Basin.

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“…The Early Carboniferous granite was developed in the Zhaerma, Sawuer, Taerbahatai and Sentasi districts, containing monzodiorite, granodiorite, granodiorite, two long granites and K-feldspar granite. The intrusive species were various from the Late Carboniferous to the Early Permian, and they were mainly K-feldspar granite, along with a large amount of A-type granite that developed in this period（Chen et al, 2004;Geng et al,2009;Chen et al, 2010). …”

Section: Geological Backgroundmentioning

confidence: 99%

Heavy Mineral Characteristics and Their Implication for Provenance of the Middle to Upper Triassic on the Northwest Margin of Junggar Basin, North China

He¹,

Zhang²,

Yao³

et al. 2017

ESR

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Heavy minerals are extremely sensitive indicators of provenance. Applying the methods of heavy mineral combination analysis, content distribution analysis, SPSS statistical component analysis, and correlation analysis, 18 heavy minerals are identified in the northwestern margin of the Junggar Basin (NW Junggar). According to the analysis of the heavy mineral characteristics and coefficients, 4 heavy mineral combinations are developed in the study area: Zircon-tourmaline-monazite-apatite-anatase, rutile-ilmenite-leucoxene-apatite-galenite, hematite-limonite-pyrite, and magnetite-epidote-hornblende. Previous results predicted that source rocks consist of intermediate-acidic magmatite, sedimentary rocks and metamorphic rocks, and intermediate-acidic magmatite is considered to be the main source rock. Furthermore, combined with the geological background of NW Junggar, Qier-Halaalat Mountain, which belongs to the Zaire Mountain front, is shown to be the provenance of the study area. The main sources of sediments are flesh-red granite, grey and greyish-green andesite, andesitic-porphyrite, grey and grayish-black tuff, siltstone, and sandstone of the Lower Carboniferous Tailegula Formation. Additionally, because of the high content of the angular-subangular and subangular-subrounded heavy mineral grains, these heavy minerals are both from near and distal provenance, with most being near-provenance deposits. During the process of provenance propulsion on the margin of the basin, clastics are mixed together and affected by regional dynamic metamorphism, which is probably the main reason for the existence of the metamorphic component.

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Zircon U–Pb ages and tectonic implications of Paleozoic plutons in northern West Junggar, North Xinjiang, China

Cited by 245 publications

References 46 publications

Late Paleozoic paleogeographic reconstruction of Western Central Asia based upon paleomagnetic data and its geodynamic implications

Late Paleozoic paleogeographic reconstruction of Western Central Asia based upon paleomagnetic data and its geodynamic implications

Zircon U-Pb and Hf isotopes of volcanic rocks from the Batamayineishan Formation in the eastern Junggar Basin

Heavy Mineral Characteristics and Their Implication for Provenance of the Middle to Upper Triassic on the Northwest Margin of Junggar Basin, North China

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