Evolving magma sources during continental lithospheric extension: Insights from the Liaonan metamorphic core complex, eastern North China craton

Ji, Mo; Liu, Junlai; Hu, Ling; Shen, Liang; Huimei, Guan

doi:10.1016/j.tecto.2015.01.023

Cited by 37 publications

(9 citation statements)

References 75 publications

(135 reference statements)

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“…1) backarc extension caused by the subduction of the paleo-Pacific plate (Li YJ et al, 2020;Ji M et al, 2015;Liu JL et al, 2013;Chen Y et al, 2014;Zheng JP & Dai HK, 2018;Zhu G et al, 2012); 2) foundering of the lower crust and/or the mantle lithosphere (Gao S et al, 2004;Lin W & Wang QC, 2006;Lin W & Wei W, 2020); 3) post-orogenic collapse (Coney & Harms, 1984;Darby et al, 2004;Davis et al, 2002;Wang T et al, 2011;Zheng YD et al, 1988;Zheng YD & Wang T, 2005;Huet et al, 2011;Jolivet et al, 2013;Lister et al, 1984) and 4) mantle plume upwelling (Xu YG, 2001).…”

Section: Slab Rollback As a Mechanism Of MCC Formationmentioning

confidence: 99%

“…Three peaks of magmatism occurred in the Triassic, Jurassic, and Early Cretaceous (Figure 1c). MCCs are widely distributed in the NCC (Figure 1a), from the Hohhot MCC (Davis et al, 2002;Lin W & Wang QC, 2006) in the northwest to the Yunmeng Mountain MCC (Chen Y et al, 2014;Davis et al, 2002;Lin W & Wang QC, 2006;Zheng YD et al, 1988) in the central NCC, to the eastern Yiwulu Mountain (Waziyu) MCC (Darby et al, 2004;Zhang BL et al, 2012) and southern Liaoning MCC (Ji M et al, 2015;Liu JL et al, 2005 in the east, and the Xiaoqinling MCC (Li YJ et al, 2020;Lin W & Wei W, 2020;Zhang JJ & Zheng YD, 1999) in the south margin. It is noteworthy that MCCs in the NCC have the following common characteristics: (i) they have similar activity times (135-These characteristics suggest that the formation of MCCs may be controlled by a common largescale tectonic stress and linked to the change of thermal state of the lithosphere.…”

Section: Introductionmentioning

confidence: 99%

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Numerical modeling of metamorphic core complex formation: Implications for the destruction of the North China Craton

Ma¹,

Lü²,

Yang³

et al. 2022

Earth and Planetary Physics

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Widespread magmatism, metamorphic core complexes (MCCs), and significant lithospheric thinning occurred during the Mesozoic in the North China Craton (NCC). It has been suggested that the coeval exhumation of MCCs with uniform NW-SE shear senses and magmatism probably result from the decratonization event during the paleo-Pacific Plate retreat. Here we use 2-D finite element thermo-mechanical numerical models to investigate critical parameters controlling the formation of MCCs under far-field extensional stress. We observe three endmember deformation modes: MCC mode, symmetric-dome mode, and pure-shear mode. The MCC mode requires Moho temperature ≥ 700 °C and extensional strain rate ≥ 5×10 -16 s -1 , implying that the lithosphere had already been thinned when the MCC was formed in the Mesozoic. Combining with the widespread MCCs with the same NW-SE extension direction in the NCC, we suggest that MCCs are surface expressions of both large-scale extension and craton destruction and that rollback of the paleo-Pacific slab might be the common driving force.

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Section: Slab Rollback As a Mechanism Of MCC Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical modeling of metamorphic core complex formation: Implications for the destruction of the North China Craton

Ma¹,

Lü²,

Yang³

et al. 2022

Earth and Planetary Physics

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“…This hypothesis is mostly based on the observation that HMAs and adakitic lavas exclusively occur in hot subduction zones in the modern Earth (Defant & Drummond, 1990;Yogodzinski et al, 1995;Grove et al, 2002;Tatsumi, 2006), where a hightemperature regime leads to slab melting and transport of significant quantities of water into the mantle wedge. In this study we have shown that the early Cretaceous HMAs and adakitic rocks from the NCC formed in an intraplate extensional environment accompanied by the development of MCCs, low-angle normal faults and fault-bounded extensional basins Ji et al, 2015). Archean TTGs and sanukitoids are actually rather ambiguous as a subduction marker (Moyen, 2011), as they can be produced in tectonic environments unrelated to plate boundaries, such as the progressive maturation of an oceanic plateau above a longlived mantle plume (e.g.…”

Section: Formation Of Archean Continental Crustmentioning

confidence: 85%

“…Dacite SHY16, which has the highest SiO 2 (69Á3 wt %), as well as Guiyunhua dacite-trachydacite from the nearby Pulandian basin ( Fig. 1; Ji et al, 2015) are defined as low-Mg adakitic dacites in this study, based on their low MgO (<1Á2 wt %), Mg# (<41), Ni (<7 ppm) and Cr (<20 ppm). The remaining two dacite samples (SHY14 and SHY15), defined as high-Mg adakitic dacites in this study, have moderate MgO (2Á0-3Á1 wt %) but higher Mg# (>51), Ni ($53 ppm) and Cr ($112 ppm) than the low-Mg adakitic dacites and experimental melts equilibrated with basaltic rocks at 1-4 GPa (Rapp et al, 1999;Qian & Hermann, 2013).…”

Section: Adakitic Dacitesmentioning

confidence: 97%

Coexisting Early Cretaceous High-Mg Andesites and Adakitic Rocks in the North China Craton: the Role of Water in Intraplate Magmatism and Cratonic Destruction

Zheng

et al. 2016

J. Petrology

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High-Mg andesites (HMAs) and adakitic rocks are purported to occur exclusively in subduction zones in the modern Earth. In the North China Craton, early Cretaceous HMAs and adakitic dacites were erupted in a continental setting, apparently unrelated to subduction given their location distal (>1000 km) to the trench at that time. Here we report petrological, mineralogical and geochemical data for these rocks with the aim of constraining their petrogenesis and elucidating the role of water in intraplate magmatism and cratonic destruction. The HMAs can be subdivided into olivine (Ol-)HMAs and clinopyroxene (Cpx-)HMAs. The former have high MgO (>9Á8 wt %) and Mg# (>71), with rare high-Fo (up to 91) olivine phenocrysts, corresponding to (near-)primary magmas that equilibrated with mantle peridotite. The latter have moderate MgO (7Á8-8Á8 wt %) and Mg# (mostly <70) and low-Fo (mostly < 83) olivine phenocrysts. The Cpx-HMAs are interpreted as magmas differentiated from the Ol-HMAs by olivine-dominated fractionation at lower-crust levels. P-T-X H2O estimations show that the primary HMAs are melts of shallow (1Á1-1Á2 GPa), hot ($1250 C) and wet (H 2 O > 3 wt %) lithospheric mantle. The coexisting adakitic dacites are hydrous (H 2 O ! 5 wt %) magmas with high SiO 2 (>63 wt %), Sr/Y ratios (!39) and Yb SN (source-normalized), low (Sm/Yb) SN , and negligible Eu anomalies. They also have unradiogenic whole-rock Nd [e Nd (t) ¼ -19 to -9] and zircon Hf [e Hf (t) ¼ -23 to -21] isotopic compositions consistent with derivation by melting of ancient lower crust at depths < 40 km. Melting may have been induced by heating and addition of H 2 O from underplated HMAs. Mixing between Cpx-HMAs and low-Mg adakitic dacites in magma chambers produced high-Mg adakitic rocks. The petrogenetic model presented here explains the occurrence of intraplate HMAs and adakitic magmas elsewhere in the North China Craton. The P-T-X H2O conditions inferred for HMA generation imply that the subcontinental lithospheric mantle beneath the craton was hot and hydrous in the early Cretaceous, which may have triggered the destruction of the cratonic root. The occurrence of young HMAs and adakitic rocks in an intraplate extensional environment also casts doubts on the common use of a similar igneous rock association as an indicator of subduction processes in Archean time.

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“…It has been suggested that the peak of lithosphere thinning in the eastern NCC occurred during the Early Cretaceous, accompanied by asthenosphere upwelling, extensive magmatism, and crust extension (Wu et al 2005; Zhang et al 2014). Various mechanisms have been proposed to explain the lithosphere thinning in the Early Cretaceous, such as a thermo-chemical erosion model (Xu et al 2004), delamination of the lower crust and lithospheric mantle (Gao et al 2004; Wu et al 2005), and tectonic extension (Liu et al 2013; Ji et al 2015). The driving force of lithosphere thinning during this period was suggested to be the rollback of the Pacific plate (Li & Li, 2007; Jiang et al 2009; Kiminami & Imaoka, 2013), which subducted at the end of the Early Jurassic or the beginning of the Middle Jurassic (~180 Ma) (Jiang et al 2010; Ma et al 2014).…”

Section: Geological Backgroundmentioning

confidence: 99%

Uplift history of the Jiaodong Peninsula, eastern North China Craton: implications for lithosphere thinning and gold mineralization

et al. 2017

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The link between lithosphere thinning and formation of world-class gold deposits is well established in the Jiaodong Peninsula within the eastern North China Craton (NCC). However, the timing of initiation and duration of the lithospheric thinning process as well as the depth of formation of the mineralization remain uncertain. Since these parameters are fundamental to formulate exploration strategies, in this study we perform fission track (FT) analysis on zircon and apatite grains in Late Mesozoic granitoid samples from the Jiaodong Peninsula and provide new constraints for the mode and duration of lithospheric evolution and mineralization depth. The zircon FT ages range from 64.3 to 90.9 Ma and those of apatite show a range of 32.8–50.9 Ma. The data collectively display age peaks at ~60–80 and ~30–50 Ma. Reverse modelling of the apatite FT results indicates rapid crustal uplift during ~30–80 Ma in the Jiaodong Peninsula. This period coincides with the timing of maximal sedimentation in the neighboring basins and voluminous basaltic eruptions in the eastern NCC. We suggest that the Jiaodong Peninsula has experienced two stages of crust uplift in the Late Cretaceous and Paleogene as a consequence of the continuing lithosphere thinning, together with the surrounding basins, forming the horst–graben system in the eastern NCC. The Late Mesozoic granitoids are the main wall rocks for gold deposits in Jiaodong, and thus the crust denudation history gathered from the FT data suggest that the gold mineralization formed at depths of c. 6–11 km.

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Evolving magma sources during continental lithospheric extension: Insights from the Liaonan metamorphic core complex, eastern North China craton

Cited by 37 publications

References 75 publications

Numerical modeling of metamorphic core complex formation: Implications for the destruction of the North China Craton

Numerical modeling of metamorphic core complex formation: Implications for the destruction of the North China Craton

Coexisting Early Cretaceous High-Mg Andesites and Adakitic Rocks in the North China Craton: the Role of Water in Intraplate Magmatism and Cratonic Destruction

Uplift history of the Jiaodong Peninsula, eastern North China Craton: implications for lithosphere thinning and gold mineralization

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