High-alumina basalts from the Bogda Mountains suggest an arc setting for Chinese Northern Tianshan during the Late Carboniferous

Xie, Wenchun; Xu, Yi–Gang; Chen, Yi-Bing; Luo, Zhaohui; Hong, Lu-Bing; Ma, Liang; Liu, Haiquan

doi:10.1016/j.lithos.2016.04.005

Cited by 52 publications

(32 citation statements)

References 108 publications

(191 reference statements)

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“…3). The trachyte ignimbrites were dated to be 315 ± 2 Ma and 319 ± 3 Ma by SHRIMP technique (Xie et al, 2016b), which are interpreted as the eruption age of the volcanics of the Liushugou Formation.…”

Section: Geochronology and Petrology Of The Felsic Volcanicsmentioning

confidence: 99%

“…The operating conditions for feldspar are: 15 kV accelerating voltage, 20 nA beam current and 1 μm beam diameter. Details of these analytical methods were described by Xie et al (2016b).…”

Section: Analytical Techniquesmentioning

confidence: 99%

“…We model the fractionation history of the HAB using MELTS (Ghiorso and Sack, 1995). Variable pressures and oxygen fugacity with constant water content of 1.95 wt% and a starting composition TC-27 (Xie et al, 2016b) with the highest ε Nd(t) value of +7.4 are used in the modeling. The modeling results indicate that the lower pressure and/or higher oxygen fugacity could extend the fractional crystallization of the HAB more closely to rhyolite composition, but cannot generate the melts with major element compositions identical to the Bogda felsic volcanics (Fig.…”

Section: Fractional Crystallization Of Coexisted High-al Basaltmentioning

confidence: 99%

“…These features indicate that magma mingling between the HAB and rhyolite has also played an important role in the evolution of the Bogda intermediate ignimbrites. Xie et al (2016b). "QFM" is the abbreviation of the quartz-fayalite-magnetite oxygen buffer.…”

Section: Extensive Magma Mingling and Feldspar Fractionation Processesmentioning

confidence: 99%

“…The assimilation-fractional crystallization (AFC) modeling by DePaolo (1981) is applied to constrain the fractionation process. The HAB sample TC-27 (Xie et al, 2016b) with the highest ε Nd(t) and δEu = 1 and the rhyolite sample DST-05 with the highest Zr concentration and low ε Nd(t) are selected as two end-members (Table 3). The results show that the intermediate ignimbrites could be well produced by AFC modeling from a single starting composition with different r values (the ratio of the assimilation rate to the fractional crystallization rate; Fig.…”

Section: Extensive Magma Mingling and Feldspar Fractionation Processesmentioning

confidence: 99%

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Petrogenesis and geodynamic implications of the Late Carboniferous felsic volcanics in the Bogda belt, Chinese Northern Tianshan

Xie

Luo

et al. 2016

Gondwana Research

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Section: Geochronology and Petrology Of The Felsic Volcanicsmentioning

confidence: 99%

“…The operating conditions for feldspar are: 15 kV accelerating voltage, 20 nA beam current and 1 μm beam diameter. Details of these analytical methods were described by Xie et al (2016b).…”

Section: Analytical Techniquesmentioning

confidence: 99%

Section: Fractional Crystallization Of Coexisted High-al Basaltmentioning

confidence: 99%

Section: Extensive Magma Mingling and Feldspar Fractionation Processesmentioning

confidence: 99%

Section: Extensive Magma Mingling and Feldspar Fractionation Processesmentioning

confidence: 99%

See 3 more Smart Citations

Petrogenesis and geodynamic implications of the Late Carboniferous felsic volcanics in the Bogda belt, Chinese Northern Tianshan

Xie

Luo

et al. 2016

Gondwana Research

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Whole‐rock geochemistry and zircon Hf isotope of Late Carboniferous–Triassic sediments in the Bogda region, NW China: Clues for provenance and tectonic setting

Wang

et al. 2018

Geological Journal

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Detailed petrological, whole‐rock geochemical, and zircon Hf isotopic researches were conducted on the Late Carboniferous–Triassic sedimentary rocks in the Bogda region to evaluate the effects of weathering, sorting, and alteration, as well as to understand their provenance and tectonic setting. These rocks show variable major element compositions, but most are generally similar to post‐Archean Australian shales. The relatively narrow range of TiO2–Zr variation and good correlation between Th/Sc and Zr/Sc signify no obvious sorting and recycling of the sedimentary rocks. The relatively high index of compositional variability (0.8–3.1) and low chemical index of alteration values (44.4–76.4) of the sedimentary rocks indicate that they are immature and probably undergo weak to moderate chemical weathering. In the chondrite‐normalized diagrams, almost all the samples are distinguished by moderately enriched light rare earth element and flat heavy rare earth element patterns with negative Eu anomalies (Eu/Eu* = 0.5–0.8). In conjunction with their Th/Sc, Zr/Sc, La/Th, Zr/Al2O3, TiO2/Zr, Co/Th, and La/Sc ratios, we infer that the major sources of these sedimentary rocks were the intermediate–acidic igneous rocks from the North Tianshan and Yili–Central Tianshan. Combining the orientation of the Bogda region in the Palaeozoic that was roughly perpendicular to the Tianshan and/or East Junggar orogens with the sedimentologic, petrologic, and tectonic researches, we suggest that the Bogda region was a rift basin that occurs at high angles to the orogenic belt. On the other hand, the zircons from these sediments have minor Precambrian grains (<0.2%), positive εHf(t) values (mostly +7.1–+15.0) and young 2‐stage Hf model ages (major peak <1,000 Ma), suggesting that a juvenile continental crust exists as the basement of the Junggar Basin.

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Petrography, geochemistry, and geochronology of Lower Jurassic sedimentary rocks from the Northern Tianshan (West Bogda area), Northwest China: Implications for provenance and tectonic evolution

Tao

Wang

et al. 2018

Geological Journal

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The Bogda Mountains, situated in the southern part of the Central Asian Orogenic Belt (CAOB), is an important intraplate orogenic belt for studying the Mesozoic tectonic evolution mechanism of the CAOB. The detailed palaeogeographic evolution process of the Bogda area during Early Jurassic times remains poorly understood. The sandstone petrography, sedimentary rock geochemistry, and detrital zircon U–Pb geochronology were integrated to research the provenance of the Lower Jurassic Badaowan and Sangonghe formations clastic rocks from the northern flank of the Bogda Mountains and further constrain the palaeogeographic evolution of Bogda Mountains. The petrological and geochemical data in this study indicate that the Lower Jurassic sediments were derived from a felsic source area. Compared with the Badaowan Formation, the source rocks for the Sangonghe Formation show more mafic characteristics. U–Pb age patterns of the Badaowan Formation have multiple age groups, and most of the zircon ages are concentrated in the Carboniferous and Late Permian–Early Triassic ages. The Late Permian–Early Triassic age group disappears in the U–Pb age spectrum of the Sangonghe Formation, and every peak age is 20–50 Ma younger than those of the Badaowan Formation. Combined with the compiled sedimentary facies and paleocurrent data, the felsic‐intermediate volcanic rocks and granitoid intrusions in the Harlik arc and the east of the Jueluotage belt were the predominant sources of the Badaowan Formation, and then the dominant source changed to the bimodal volcanic rocks in the Eastern Bogda Mountains during the Sangonghe Formation deposition period. Early Mesozoic palaeogeographic evolution of the Northern Tianshan belt is speculated: (1) the paleotopography of the Jueluotage belt had a differential uplift along its strike, transforming from high in the west during Triassic times to high in the east during early Early Jurassic times and (2) the Eastern Bogda Mountains initiated uplift during late Early Jurassic times.

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High-alumina basalts from the Bogda Mountains suggest an arc setting for Chinese Northern Tianshan during the Late Carboniferous

Cited by 52 publications

References 108 publications

Petrogenesis and geodynamic implications of the Late Carboniferous felsic volcanics in the Bogda belt, Chinese Northern Tianshan

Petrogenesis and geodynamic implications of the Late Carboniferous felsic volcanics in the Bogda belt, Chinese Northern Tianshan

Whole‐rock geochemistry and zircon Hf isotope of Late Carboniferous–Triassic sediments in the Bogda region, NW China: Clues for provenance and tectonic setting

Petrography, geochemistry, and geochronology of Lower Jurassic sedimentary rocks from the Northern Tianshan (West Bogda area), Northwest China: Implications for provenance and tectonic evolution

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