Early Cretaceous Wulong intermediate-mafic dike swarms in the Liaodong Peninsula: Implications for rapid lithospheric delamination of the North China Craton

Liu, Yan; Wei, Jingsong; Zhang, Daohan; Chen, Jiajie; Zhang, Xinming

doi:10.1016/j.lithos.2020.105473

Cited by 15 publications

(8 citation statements)

References 91 publications

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“…The period of intense Early Cretaceous crust-mantle interaction corresponds very closely to the interval of widespread extension in NE China (e.g. Zhang et al 2010;Xu et al 2013;Ji et al 2019a, b;Liu et al 2020). In fact, most of eastern China, including the eastern North China and Yangtze cratons and SE China, were also characterized by Early Cretaceous extension (e.g.…”

Section: C Early Cretaceous Intense Crust-mantle Interaction Linked To Rollback Of the Palaeo-pacific Flat-subducting Slabmentioning

confidence: 86%

Early Cretaceous crust–mantle interaction linked to rollback of the Palaeo-Pacific flat-subducting slab: constraints from the intermediate–felsic volcanic rocks of the northern Great Xing’an Range, NE China

Jing

Yang

et al. 2021

Geol. Mag.

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Late Mesozoic igneous rocks are important for deciphering the Mesozoic tectonic setting of NE China. In this paper, we present whole-rock geochemical data, zircon U–Pb ages and Lu–Hf isotope data for Early Cretaceous volcanic rocks from the Tulihe area of the northern Great Xing’an Range (GXR), with the aim of evaluating the petrogenesis and genetic relationships of these rocks, inferring crust–mantle interactions and better constraining extension-related geodynamic processes in the GXR. Zircon U–Pb ages indicate that the rhyolites and trachytic volcanic rocks formed during late Early Cretaceous time (c. 130–126 Ma). Geochemically, the highly fractionated I-type rhyolites exhibit high-K calc-alkaline, metaluminous to weakly peraluminous characteristics. They are enriched in light rare earth elements (LREEs) and large-ion lithophile elements (LILEs) but depleted in high-field-strength elements (HFSEs), with their magmatic zircons ϵHf(t) values ranging from +4.1 to +9.0. These features suggest that the rhyolites were derived from the partial melting of a dominantly juvenile, K-rich basaltic lower crust. The trachytic volcanic rocks are high-K calc-alkaline series and exhibit metaluminous characteristics. They have a wide range of zircon ϵHf(t) values (−17.8 to +12.9), indicating that these trachytic volcanic rocks originated from a dominantly lithospheric-mantle source with the involvement of asthenospheric mantle materials, and subsequently underwent extensive assimilation and fractional crystallization processes. Combining our results and the spatiotemporal migration of the late Early Cretaceous magmatic events, we propose that intense Early Cretaceous crust–mantle interaction took place within the northern GXR, and possibly the whole of NE China, and that it was related to the upwelling of asthenospheric mantle induced by rollback of the Palaeo-Pacific flat-subducting slab.

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Section: C Early Cretaceous Intense Crust-mantle Interaction Linked To Rollback Of the Palaeo-pacific Flat-subducting Slabmentioning

confidence: 86%

Early Cretaceous crust–mantle interaction linked to rollback of the Palaeo-Pacific flat-subducting slab: constraints from the intermediate–felsic volcanic rocks of the northern Great Xing’an Range, NE China

Jing

Yang

et al. 2021

Geol. Mag.

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“…The crystallization ages of the alkaline rocks from the Luxi Terrane are in the range of 122-131 Ma, corresponding to the peak time of lithospheric destruction of the NCB (120-130 Ma) [54,55]. In addition, the lithospheric destruction mainly occurred in eastern NCB due to the subduction of the Izanagi plate during the Early Cretaceous [42,[56][57][58][59][60][61][62][63][64][65][66][67][68]. Hence, the subducting Izanagi plate during the Late Mesozoic may have played an important role in the lithospheric destruction of the NCB.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

“…Hence, the subducting Izanagi plate during the Late Mesozoic may have played an important role in the lithospheric destruction of the NCB. The Izanagi plate subducted beneath the NCB during the Jurassic, resulting in the thickening of the lower crust [60][61][62]. Asthenosphere upwelling and partial melting of the lithospheric mantle were caused by the rollback of the subducting Izanagi plate during the Early Cretaceous [59,[62][63][64][65][66].…”

Section: Tectonic Implicationsmentioning

confidence: 99%

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Partial Melting of Lithospheric Mantle and Formation of the Early Cretaceous Alkaline Rocks in the Guandimiao REE Deposit, Luxi Terrane, Eastern China

Qiu

Zhi

et al. 2022

Minerals

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The Luxi Terrane (eastern China) exposes widespread Early Cretaceous alkaline rocks, whereas their petrogenesis remains controversial, including fractional crystallization, partial melting and crustal contamination regime. Here, we present petrology, geochemistry, sphene U-Pb geochronology and trace element data from the syenogranite, quartz syenite and quartz monzonite of the Guandimiao alkaline complex rocks to investigate their petrogenesis. Geochemical data suggest that these alkaline rocks show alkalic and peralkaline characters, and high Ga/Al ratios, SiO2, light rare-earth element (LREE), Zr and Nb, and low MgO, CaO, Eu contents, corresponding to A-type granites. Sphene trace elements in syenogranite and quartz monzonite show obvious fractionation between LREE and heavy rare-earth element (HREE) and high Th/U ratios, indicating a magmatic origin. They yield U-Pb lower intercept ages of 128 ± 2.3 Ma and 127 ± 1.3 Ma, representing the crystallization ages of these alkaline rocks. The negative correlations between CaO, Fe2O3 (Total), MgO, P2O5, TiO2, MnO and the pronounced depletion in Nb, Ta and Ti suggest that the alkaline rocks were formed by fractional crystallization. Additionally, the positive correlation between La/Hf and La, Th and Th/V, Ce/Yb and K2O, and Tb/Yb and Yb suggest that the alkaline melts are generated by partial melting. Such high Rb/Nb, (Th/Nb)N and Nb/Th ratios indicate crustal contamination during the magma emplacement. We, therefore, propose the magma source of the alkaline rocks in the Guandimiao complex originated by partial melting of lithospheric mantle, which experienced fractional crystallization and crustal contamination processes during its emplacement. Such complex alkaline rocks were probably formed in an extensional back-arc setting induced by the retreat of the subducting Izanagi plate.

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“…The NCC is triangular in shape, with the Central Asian Orogenic belt, and the Qinling-Dabie and Sulu high-ultrahigh-pressure metamorphic belts, located to its north, south and east, respectively (Fig. 1a; Zhao et al 2005;Liu et al 2020). The NCC was formed as a result of the collision between eastern and western blocks along the central orogenic belt during the Palaeoproterozoic Era (c. 1.85 Ga; Zhao et al 2005;Zhai & Santosh, 2011), after which the NCC remained relatively stable and formed sedimentary basins and thick sedimentary rocks.…”

Section: Geological Setting and Sample Descriptionsmentioning

confidence: 99%

Petrogenesis of Early Cretaceous adakites from the Liaodong Peninsula: insight into the lithospheric thinning of the North China Craton

Wang

Sun²,

Shen³

et al. 2022

Geol. Mag.

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Lithospheric thinning occurred in the North China Craton (NCC) that resulted in extensive Mesozoic magmatism, which has provided the opportunity to explore the mechanism of the destruction of the NCC. In this study, new zircon U–Pb ages, geochemical and Lu–Hf isotopic data are presented for Early Cretaceous adakitic rocks in the Liaodong Peninsula, with the aim of establishing their origin as well as the thinning mechanism of the NCC. The zircon U–Pb data show that crystallization occurred during 127–120 Ma (i.e. Early Cretaceous). These rocks are characterized by high Sr (294–711 ppm) content and Sr/Y ratio (38.5–108), low Yb (0.54–1.24 ppm) and Y (4.9–16.4 ppm) contents, and with no obvious Eu anomalies, implying that they are adakitic rocks. They are enriched in large-ion lithophile elements (e.g. Ba, K, Pb and Sr) and depleted in high-field-strength elements (e.g. Nb, Ta, P and Ti). These adakitic rocks have negative zircon ϵHf(t) contents (−28.9 to −15.0) with two-stage Hf model ages (TDM2) of 3004–2131 Ma. Based on the geochemical features, such as low TiO2 and MgO contents, and high La/Yb and K2O/Na2O ratios, these adakites originated from the partial melting of thickened eclogitic lower crust. They were in an extensional setting associated with the slab rollback of the Palaeo-Pacific Ocean. In combination with previous studies, as a result of the rapid retracting of the Palaeo-Pacific Ocean during 130–120 Ma, the asthenosphere upwelled and modified the thickened lithospheric mantle, which lost its stability, resulting in the lithospheric delamination and thinning of the NCC.

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Early Cretaceous Wulong intermediate-mafic dike swarms in the Liaodong Peninsula: Implications for rapid lithospheric delamination of the North China Craton

Cited by 15 publications

References 91 publications

Early Cretaceous crust–mantle interaction linked to rollback of the Palaeo-Pacific flat-subducting slab: constraints from the intermediate–felsic volcanic rocks of the northern Great Xing’an Range, NE China

Early Cretaceous crust–mantle interaction linked to rollback of the Palaeo-Pacific flat-subducting slab: constraints from the intermediate–felsic volcanic rocks of the northern Great Xing’an Range, NE China

Partial Melting of Lithospheric Mantle and Formation of the Early Cretaceous Alkaline Rocks in the Guandimiao REE Deposit, Luxi Terrane, Eastern China

Petrogenesis of Early Cretaceous adakites from the Liaodong Peninsula: insight into the lithospheric thinning of the North China Craton

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