Geochemical and geochronological evidence for a former early Neoproterozoic microcontinent in the South Beishan Orogenic Belt, southernmost Central Asian Orogenic Belt

Yuan, Yue; Zong, Keqing; He, Zhenyu; Klemd, Reiner; Liu, Yongsheng; Hu, Zhaochu; Guo, Jingliang; Zhang, Zeming

doi:10.1016/j.precamres.2015.05.034

Cited by 67 publications

(31 citation statements)

References 85 publications

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“…Results in the literature and those obtained in this study reveal pronounced magmatic activity on a continental margin (most likely Rodinian) that produced the Proterozoic granitic protoliths of the Beishan orthogneisses (Liu et al, 2015;Yuan et al, 2015). From the Paleozoic geological history of the Beishan Orogen, we interpret current data on the Gubaoquan eclogite to show that a first collision occurred between the leading edge of the Dunhuang Block, and the active continental margin of the Mazongshan-Hanshan Block (Huaniushan Arc) with a subduction to the north (Fig.…”

Section: Tectonic Model Setting and Implicationssupporting

confidence: 66%

“…However, the true relationship between these two units is unknown, due to the Quaternary sediment that covers much of the craton, with outcrops limited to the margins of the terrane. Similarities in terms of shared orogenic history suggests that the Dunhuang Block was involved in the Ordovician Beishan orogeny (Zong et al, 2012;He et al, 2014b;Yuan et al, 2015;Zhao et al, 2016, this study).…”

Section: Geological History and Terrane Overview Of The Beishan Orogenmentioning

confidence: 56%

“…Previous studies suggested that the Dunhuang Block and southern Beishan terranes differ from each other, because Archean zircons have not been found in the latter (He et al, 2013;Yuan et al, 2015). Resemblance in meta-igneous zircon populations across these terranes was previously used to separate the Dunhuang Block from southern Beishan terranes (Jiang et al, 2013;He et al, 2014b;He et al, 2015b), which in turn were correlated with Central Tianshan Terranes (He et al, 2015a).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Continental origin of the Gubaoquan eclogite and implications for evolution of the Beishan Orogen, Central Asian Orogenic Belt, NW China

Saktura

Buckman

Nutman

et al. 2017

Lithos

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The Gubaoquan eclogite occurs in the Paleozoic Beishan Orogen of NW China. Previously it has been interpreted as a fragment of subducted oceanic crust that was emplaced as a mélange within continental rocks. Contrary to this, we demonstrate that the Gubaoquan eclogite protolith was a Neoproterozoic basic dyke/sill which intruded into Proterozoic continental rocks. The SHRIMP U-Pb zircon dating of the metamorphic rims of the Gubaoquan eclogite yields an age 466 ± 27 Ma. Subdued heavy rare earth element abundances and lack of negative Eu anomalies of the metamorphic zircon domains confirm that this age represents eclogite facies metamorphism. The host augen orthogneiss has a U-Pb zircon age of 920 ± 14 Ma, representing the timing of crystallization of the granitic protolith. A leucogranitic vein which intrudes the eclogite has a U-Pb zircon age of 424 ± 8.6 Ma. This granitic vein marks the end of high-grade metamorphism in this area. The overcomplication of tectonic history of the Beishan Orogen is partially caused by inconsistent classifications and nomenclature of the same rock units and arbitrary subdivisions of Precambrian blocks as individual microcontinents. In an attempt to resolve this, we propose a simpler model that involves the partial subduction of the northern passive margin of the

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Section: Tectonic Model Setting and Implicationssupporting

confidence: 66%

Section: Geological History and Terrane Overview Of The Beishan Orogenmentioning

confidence: 56%

Section: Accepted Manuscriptmentioning

confidence: 99%

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Continental origin of the Gubaoquan eclogite and implications for evolution of the Beishan Orogen, Central Asian Orogenic Belt, NW China

Saktura

Buckman

Nutman

et al. 2017

Lithos

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“…Recent geochronological studies have demonstrated abundant ca. 0.95–0.90 Ga granitoids in the Yili‐Central Tianshan blocks [e.g., Huang et al ., ; Gao et al ., ; Yuan et al ., ] and the Altyn Tagh‐Qilian‐Quanji blocks [e.g., Song et al ., ; Yu et al ., ; Wang et al ., ] to the north and southeast of the Tarim Craton, respectively. These magmatic events are much younger than typical Grenvillian orogenic events (1.3–1.0 Ga) [e.g., Rivers , ].…”

Section: Geological Setting and Samplesmentioning

confidence: 99%

Mid-Neoproterozoic (ca. 830-800 Ma) metamorphicP-Tpaths link Tarim to the circum-Rodinia subduction-accretion system

Zhu

Wilde

2016

Tectonics

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Long‐lived exterior accretionary orogeny shapes tectonothermal evolution of the peripheral building blocks of supercontinents and leads to considerable crustal growth. However, such accretionary orogeny has only been locally recognized for the Rodinia supercontinent. Here a suite of newly discovered mid‐Neoproterozoic high‐grade metamorphic rocks in the northern Tarim Craton, NW China, are used to test the exterior accretion hypothesis for Rodinia. These rocks occur as dark‐colored mafic and calc‐silicate boudins in impure marbles and mica schists. Geochemical data suggest a protolith of arc‐related basalts metasomatized by Ca‐rich fluids. Mineral assemblages, phase diagram modeling, and mineral compositions for a garnet pyroxenite and a garnet clinopyroxene gneiss reveal upper amphibolite to high‐pressure granulite facies peak metamorphism (660–700°C, 11–12 kbar) following a counterclockwise P‐T path, which is characterized by prograde burial and heating, followed by near‐isothermal burial and retrograde exhumation and cooling. This P‐T path is interpreted to have recorded crustal thickening of an earlier magmatic arc transformed to a fore arc by subduction erosion and subsequent burial along bent isotherms near the subduction channel. All studied samples record ca. 830–800 Ma metamorphic zircon U‐Pb ages, which probably date the early exhumation and cooling according to Ti‐in‐zircon temperatures, zircon rare earth element patterns, and Hf isotopes. This is the first mid‐Neoproterozoic P‐T‐t path in Tarim, and it provides metamorphic evidence for a mid‐Neoproterozoic advancing‐type accretionary orogeny, which is coeval with the initial breakup events of Rodinia and thus links Tarim to the circum‐Rodinia accretion system, supporting the peripheral subduction model.

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“…Previous studies mainly focused on the age and geochemistry of the ophiolites, magmatism, metamorphism and Precambrian rocks (Hu et al, 2006(Hu et al, , 2010Li et al, 2009Li et al, , 2011Mao et al, 2012a, b;Song et al, 2013a, b;Ye et al, 2013;Guo et al, 2014Guo et al, , 2017Yuan et al, 2015;Liu et al, 2015;Yang et al, 2016;He et al, 2018;Wang et al, 2018Wang et al, , 2019Zhao et al, 2018b;, but little attention was paid to the age and provenance of the siliciclastic rocks in the Beishan orogenic belt. This seriously affects our ability to understand the evolution of the Paleo-Asian Ocean and the process of ocean-continent transition.…”

Section: Introductionmentioning

confidence: 99%

The Tectonic Implications of the Hongliuhe‐Xichangjing Ophiolitic Mélanges Belt in the Central Region of the Beishan Orogen, NW China — Constrained by the U‐Pb Ages of Detrital Zircons of the Metasandstones

Jian

Xin

Teng

et al. 2020

Acta Geologica Sinica (Eng)

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The tectonic attributes of different blocks within orogenic belts are of great significance for the study of accretionary processes and the evolution of Earth. The Hongliuhe‐Niujianzi‐Baiyunshan‐Xichangjing ophiolitic mélange belt (HXOMB) is distributed in the heart of the Beishan Orogen, the Shuangyingshan and Minshui‐Hanshan blocks being distributed in the south and north of the HXOMB respectively, and a large number of Early Paleozoic geological units are exposed on the blocks. According to the zircon age populations of the metasandstones in the Baiyunshan area recovered in this paper, when compared with the zircon age populations of the Paleozoic metasandstones reported in the Niujuanzi and Hanshan areas, we found that the metasandstones of the Shuangyingshan Block have age peaks at c. 598 Ma, 742 Ma, 828 Ma, 941 Ma, 990 Ma, 1168Ma, 1636 Ma, 2497 Ma with non‐significant age populations of 1500–1300 Ma, showing a possible affinity with the Tarim Craton; the metasandstones of the Minshui‐Hanshan Block have age peaks at c. 606 Ma, 758 Ma, 914 Ma, 1102 Ma, 1194 Ma, 1304 Ma, 1672 Ma with significant age populations of 1500‐1300 Ma, showing a possible affinity with the Chinese Central Tianshan Block. Therefore, the HXOMB of the Beishan Orogen is of great significance in plate segmentation, which separates the Tarim Craton in the south and the Chinese Central Tianshan Block in the north. Based on the evolutionary process of the Hongliuhe‐Xichangjing ocean in the Beishan Orogen, we believe that break‐up and convergence can be recognized as having occurred twice between the Chinese Central Tianshan Block and the Tarim Craton since the Mesoproterozoic in the Beishan area. This was related firstly to the break‐up of the Columbia Supercontinent and the convergence of the Rodinia Supercontinent, mainly during the Middle Mesoproterozoic to Early Neoproterozoic, and secondly to the opening and closing of the Hongliuhe‐Xichangjing ocean, mainly during the Early Paleozoic.

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Geochemical and geochronological evidence for a former early Neoproterozoic microcontinent in the South Beishan Orogenic Belt, southernmost Central Asian Orogenic Belt

Cited by 67 publications

References 85 publications

Continental origin of the Gubaoquan eclogite and implications for evolution of the Beishan Orogen, Central Asian Orogenic Belt, NW China

Continental origin of the Gubaoquan eclogite and implications for evolution of the Beishan Orogen, Central Asian Orogenic Belt, NW China

Mid-Neoproterozoic (ca. 830-800 Ma) metamorphicP-Tpaths link Tarim to the circum-Rodinia subduction-accretion system

The Tectonic Implications of the Hongliuhe‐Xichangjing Ophiolitic Mélanges Belt in the Central Region of the Beishan Orogen, NW China — Constrained by the U‐Pb Ages of Detrital Zircons of the Metasandstones

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