Late Permian appinite–granite complex from northwestern Liaoning, North China Craton: Petrogenesis and tectonic implications

Zhang, Xiaohui; Xue, Feng; Yuan, Lingling; Ma, Yonghui; Wilde, Simon A.

doi:10.1016/j.lithos.2012.09.002

Cited by 60 publications

(18 citation statements)

References 107 publications

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“…Results for trace elements show that the hornblende gabbros are characterized by selective enrichment of LILEs and LREEs, and depletion in high‐field‐strength elements and HREEs, showing E‐MORB‐like REE patterns and trace element spider diagrams (Figure ). Such geochemical characteristics can be ascribed either to a MORB‐like magmatic source enriched by slab‐derived hydrous fluids under volcanic arc conditions or to partial melting of an enriched mantle source that had been enriched in LILEs and LREEs by slab‐derived hydrous fluids or melts prior to magma generation (Zhang et al, ). Isotopic data for the early Carboniferous hornblende gabbros, including positive ε Hf (t) values of +1.34 to +8.97 and a range of T DM1 model ages from 595 to 902 Ma (Figure ; Table S3), suggest that the primitive magmatic source materials consisted of newly formed MORB and/or enriched lithospheric mantle materials.…”

Section: Discussionmentioning

confidence: 99%

Late Devonian to early Carboniferous magmatism in the western Songliao–Xilinhot block, Northeast China: Implications for eastward subduction of the Nenjiang oceanic lithosphere

Liu

Qin

et al. 2020

Geological Journal

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The timing and direction of narrowing and closure of the Nenjiang Ocean (NJO) by plate subduction remain poorly constrained. This paper presents geochemical, isotopic, and geochronological results for Late Devonian to early Carboniferous intrusive rocks in the western Songliao–Xilinhot block to constrain the evolution of subduction in the NJO region. The Late Devonian syenogranites and monzogranites formed at 366–360 Ma and are classified as A‐type granites. The wide range of εHf(t) values (−17.62 to +8.13) and TDM2 ages (789–2,208 Ma) of the syenogranites indicate that the primary magma was derived from partial melting of multiple sources, including both young accreted continental crust and old lower crust rocks. The early Carboniferous granitic mylonites formed at 342 Ma and are I‐type granites. Their high SiO2 and K2O contents, εHf(t) values of +6.61 to +9.86, and young TDM2 ages of 675 to 857 Ma suggest a preexisting juvenile crustal material source region. The early Carboniferous hornblende gabbros formed at 334 Ma and are part of an appinite suite. The gabbros have low silica and high MgO contents, E‐MORB‐like trace element features, εHf(t) values of +1.34 to +8.97, and young TDM1 ages of 595 to 902 Ma, which together suggest a primitive magmatic source including juvenile MORB and/or enriched lithospheric mantle. Magmatism in the western Songliao–Xilinhot block formed a late Palaeozoic magmatic arc stretching along the eastern Hegenshan–Heihe suture. A new model of the evolution of subduction in the NJO region and associated coeval magmatic events is proposed that includes westward subduction of NJO oceanic crust during the Late Devonian at 366–360 Ma, bidirectional subduction during the early Carboniferous at ~342 Ma, and break‐off/delamination of the eastward subducting slab at ~334 Ma.

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Section: Discussionmentioning

confidence: 99%

Late Devonian to early Carboniferous magmatism in the western Songliao–Xilinhot block, Northeast China: Implications for eastward subduction of the Nenjiang oceanic lithosphere

Liu

Qin

et al. 2020

Geological Journal

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“…Hence, the Triassic period is a key to decipher the tectonic transition and the evolution of Central-Eastern Asia. However, as only a few sedimentary and magmatic rocks are exposed as well as their low degree of investigation, the Triassic tectonic evolution of CentralEastern Asia is still poorly understood and remains controversial (IMBGMR, 1991;Chen et al, 2000;Li et al, 2007;X. Zhang et al, 2012;Li et al, 2014).…”

Section: Geodynamic Implications On the Triassic Tectonics Of Centralmentioning

confidence: 99%

“…Zhang et al, 2012;Li et al, 2014). Some authors considered that the Triassic was a late-to post-orogenic period with respect to the CAOB, with syn-to post-orogenic magmatic intrusions (Chen et al, 2000;X. Zhang et al, 2012) and foreland-style non-marine arid climate deposits (Hendrix et al, 1996;Johnson et al, 2008).…”

Section: Geodynamic Implications On the Triassic Tectonics Of Centralmentioning

confidence: 99%

“…It is worth noting that a Late Triassic Metamorphic Core Complex (MCC) has been identified in the Sunidzuoqi area, and that several Late Triassic extension-related granitic and syenitic plutons occurred along the northern margin of the NCB (Fig. 8b; Wang et al, 2004;Davis et al, 2004;X. Zhang et al, 2012).…”

Section: Geodynamic Implications On the Triassic Tectonics Of Centralmentioning

confidence: 99%

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A new Triassic shortening-extrusion tectonic model for Central-Eastern Asia: Structural, geochronological and paleomagnetic investigations in the Xilamulun Fault (North China)

Zhao

Faure

Chen

et al. 2015

Earth and Planetary Science Letters

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International audienceAt the northern margin of the North China Block (NCB), the Xilamulun Fault (XMF) is a key belt to decipher the tectonic evolution of Central-Eastern Asia, as it records the Paleozoic final closure of the Paleo-Asian Ocean, and localizes a Late Triassic intracontinental deformation. In this study, structural analysis, 40Ar–39Ar dating, and paleomagnetic studies were performed to investigate the kinematics of the XMF and to further discuss its Triassic geodynamic significance in the Central-Eastern Asia framework after the Paleozoic Central Asian Orogenic evolution. The structural analyses reveal two phases of ductile deformation. The first one (D1), which displays N-verging and E–W trending folds, is related to the Early Paleozoic collisional event between the NCB and the Songliao–Hunshandake Block (SHB). The second phase (D2) displays a high-angle foliation and a pervasive sub-horizontal E–W stretching lineation with kinematic criteria indicative of dextral strike–slip shearing. The 40Ar–39Ar dating on mylonitic granite places the main shearing event around 227–209 Ma. This D2 shearing is coeval with that of the dextral strike–slip Bayan Obo–Chifeng Fault (BCF) and the Chicheng–Fengning–Longhua Fault to the south, which together constitute a dextral shearing fault system on the northern margin of the NCB during the Late Triassic. The paleomagnetic study performed on the Middle Permian Guangxingyuan pluton, located between the XMF and BCF, documents a local clockwise rotation of this pluton with respect to the NCB and SHB. Our multidisciplinary study suggests an NNW–SSE shortening and strike–slip shearing dominated tectonic setting on the northern margin of the NCB during the Late Triassic. Combining the contemporaneous dextral strike–slip movements of the XMF and BCF in northern China and the sinistral strike–slip movement of East Gobi Fault (EGF) in southeastern Mongolia with the large-scale tectonic framework, a Late Triassic NNW–SSE shortening-eastward extrusion tectonic model for Central-Eastern Asia is firstly proposed. The NNW–SSE shortening results in the eastward extrusion of the continental wedge bounded by the BCF and EGF, which is accommodated by the different kinematic patterns of the southern (XMF and BCF) and northwestern (EGF) bounding faults. This shortening-extrusion tectonic framework is tentatively interpreted as the result of the far field forces associated with three Late Triassic lithosphere-scale convergences in East Asia: i) northward intracontinental subduction between the NCB and South China Block, ii) collision of the Qiangtang Block with the Qaidam Block, and iii) southward subduction of the Mongol–Okhotsk Ocean beneath the Mongolia Block

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“…In summary, the origins of the magmas rich in ore-forming fluids in the Bilihe gold district were related to dehydration partial melting of subducted oceanic crust → partial melting of depleted mantle → partial melting of lower crust → partial melting of old upper crust (e.g., Zhang et al, 2009bZhang et al, , 2012Zhang et al, , 2014. The dehydration partial…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Permian magmatic sequences of the Bilihe gold deposit in central Inner Mongolia, China: Petrogenesis and tectonic significance

Liu

Fengjun

2015

Lithos

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Late Permian appinite–granite complex from northwestern Liaoning, North China Craton: Petrogenesis and tectonic implications

Cited by 60 publications

References 107 publications

Late Devonian to early Carboniferous magmatism in the western Songliao–Xilinhot block, Northeast China: Implications for eastward subduction of the Nenjiang oceanic lithosphere

Late Devonian to early Carboniferous magmatism in the western Songliao–Xilinhot block, Northeast China: Implications for eastward subduction of the Nenjiang oceanic lithosphere

A new Triassic shortening-extrusion tectonic model for Central-Eastern Asia: Structural, geochronological and paleomagnetic investigations in the Xilamulun Fault (North China)

Permian magmatic sequences of the Bilihe gold deposit in central Inner Mongolia, China: Petrogenesis and tectonic significance

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