A 2.5 Ga fore-arc subduction-accretion complex in the Dengfeng Granite-Greenstone Belt, Southern North China Craton

Deng, Hao; Kusky, Timothy M.; Polat, Ali; Wang, Chen; Wang, Lu; Li, Yunxiu; Wang, Junpeng

doi:10.1016/j.precamres.2016.01.024

Cited by 69 publications

(10 citation statements)

References 137 publications

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“…Forearc basalts formed first by decompression melting of a mantle that had undergone limited metasomatism by slab-derived fluids during the subduction initiation stage 28 , 42 . Continuous intra-oceanic subduction and slab roll-back led to arc maturation, with the generation of typical SSZ magmatic sequences, including an intrusive TTG suite and a high-Mg basalt/diorite (sanukitoid)–IAB–ADR volcanic suite in the western Angou and Dengfeng regions, as well as in other segments of the Central arc system 20 , 44 , 46 (Fig. 6b ).…”

Section: Resultsmentioning

confidence: 99%

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Coexisting divergent and convergent plate boundary assemblages indicate plate tectonics in the Neoarchean

et al. 2022

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The coexistence of divergent (spreading ridge) and convergent (subduction zone) plate boundaries at which lithosphere is respectively generated and destroyed is the hallmark of plate tectonics. Here, we document temporally- and spatially-associated Neoarchean (2.55–2.51 Ga) rock assemblages with mid-ocean ridge and supra-subduction-zone origins from the Angou Complex, southern North China Craton. These assemblages record seafloor spreading and contemporaneous subduction initiation and mature arc magmatism, respectively, analogous to modern divergent and convergent plate boundary processes. Our results provide direct evidence for lateral plate motions in the late Neoarchean, and arguably the operation of plate tectonics, albeit with warmer than average Phanerozoic subduction geotherms. Further, we surmise that plate tectonic processes played an important role in shaping Earth’s surficial environments during the Neoarchean and Paleoproterozoic.

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Section: Resultsmentioning

confidence: 99%

“…6c ), resulting in the Neoarchean ocean plate stratigraphy/ophiolitic mélanges, arc magmatic rocks, and paired metamorphism (Figs. 1 a and 6a ) 18 , 20 , 22 , 46 , 48 . These features are similar to the structural, magmatic, and metamorphic styles observed in Phanerozoic accretionary orogens 49 .…”

Section: Resultsmentioning

confidence: 99%

Coexisting divergent and convergent plate boundary assemblages indicate plate tectonics in the Neoarchean

et al. 2022

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“…Compilations of whole-rock Sm-Nd or zircon Lu-Hf isotopic model ages reveal ~2.7 Ga crustal growth along with crustal reworking at ~2.5 Ga (Wu et al, 2005;Geng et al, 2012;Wang and Liu, 2012). Alternatively, a Neoarchean subduction-related arc setting was advocated for the northern margin of the EB as well as for some of the Neoarchean complexes that have been involved in the Paleoproterozoic TNCO (Liu et al, 2002(Liu et al, , 2004(Liu et al, , 2011aDiwu et al, 2011;Kusky, 2011;Nutman et al, 2011;Wang et al, 2011Wang et al, , 2012aWang et al, , 2013Wang et al, , 2015bWang et al, , 2016Guo et al, 2013Guo et al, , 2015aBai et al, 2014aBai et al, , 2016Deng et al, 2016). In particular, a ~2.6-2.5 Ga intra-oceanic arc was proposed to have formed along northwestern EB, marking a pulse of intense crustal growth within the craton (Wang et al, 2015b).…”

Section: Geological Backgroundmentioning

confidence: 99%

Late Neoarchean crust-mantle geodynamics: Evidence from Pingquan Complex of the Northern Hebei Province, North China Craton

Wang

Liu

Cawood

et al. 2017

Precambrian Research

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A late Neoarchean intra-oceanic arc along the northwestern margin of Eastern Block (EB), North China Craton, provides important insights into the nature of Archean mantle sources and crust-mantle geodynamics. The Pingquan Complex and the entire Northern Hebei Province (NHB) are located in the middle part of the arc, and overlap the northern extent of the Trans-North China Orogen. Zircon U-Pb isotopic age data reveal that the Pingquan Complex consists of ~2537-2515 Ma dioritic gneisses, ~2506-2503 Ma amphibolites, and ~2491 Ma quartz monzodioritic to monzogranitic gneisses, and they show dominantly positive zircon εHf(t) (-0.6-+5.4) that are lower than coeval model depleted mantle values. Geochemical data for the Pingquan rocks and synchronous metabasalts and granitoid gneisses of Huai'an-Xuanhua and Dantazi complexes in the NHB are integrated. Except for the monzogranitic gneisses that were derived from partial melting of juvenile metagreywackes, the other rocks of the Pingquan Complex were derived from a metasomatized lithospheric mantle, and subjected to variable fractionation of clinopyroxene, hornblende and plagioclase, without significant crustal contamination. Moderately depleted zircon εHf(t), and high Sm/Hf and Nb/Ta (mostly of 1.34-3.96 and 15.50-32.58) suggest that the lithospheric mantle was enriched by subducted pelagic sediments metamorphosed to rutile-bearing eclogites before melting. Late Neoarchean crust-mantle geodynamic processes in the NHB are reconstructed. Intra-oceanic subduction initiated offshore of the northwestern margin of the EB at ~2.55 Ga or earlier. Partial melting of slab basalts occurred at ~2542-2499 Ma, with the melts contaminated by mantle wedge materials forming TTGs. Meanwhile, the sub-arc lithospheric mantle was enriched by fluids and melts released from slab basalts and pelagic sediments, and partial 3 melting of this moderately depleted mantle generated ~2537-2503 Ma diorites and basalts. Following final accretion of the arc onto the continental margin of the EB, the slab rollback/breakoff and asthenospheric mantle upwelling triggered partial melting of the metasomatized lithospheric mantle and crustal anatexis, generating ~2491 Ma quartz monzodioritic and monzogranitic rocks. Accordingly, the NHB records Neoarchean crustal growth linked to oceanic subduction and arc-continent accretion, and highlights the importance of resolving the nature of mantle sources and crust-mantle interactions in understanding Archean crustal growth and evolution.

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“…The formation of the Jianping suture zone at 2.53-2.49 Ga is also coeval with the formation of YF-GGB and other suture zones (e.g., Zunhua-Shangyin, Zanzhuang, Dengfeng) in the NCC (Fig. 15b; Kusky, 2011;Wang et al, 2015;Deng et al, 2016;Kusky et al, 2016;Huang et al, 2019;Peng et al, 2020), constraining the timing of the Jining-Jiaoliao microblock collision. Extensive granitoids intruded the metavolcanic rocks (>2.5 Ga) in the YF-GGB, reflecting another NCC crustal growth epoch.…”

Section: Significance For the Evolution Of The North China Cratonmentioning

confidence: 94%

Petrogenesis of the Chaihulanzi Gneiss and its Tectonic Implications for the North China Craton

Xie

Xia

et al. 2021

Acta Geologica Sinica (Eng)

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The Chaihulanzi area in eastern Inner Mongolia is tectonically situated on the northern margin of the North China Craton (NCC). The main Precambrian lithologies of the area have been referred to the Archean Jianping Group meta‐supracrustal sequences. Based on field observations, petrographic, whole‐rock geochemical, and zircon U‐Pb geochronological results, a magmatic origin for the units is proposed. Our results show that the Chaihulanzi gneisses are mainly of granitic, dioritic and granodioritic compositions, and show typical magmatic rock textures and mineral assemblages. The dioritic and granodioritic gneisses show Na‐rich tonalite–trondhjemite–granodiorite (TTG)‐like affinity with zircon U‐Pb dates of ca. 2.57–2.59 Ga, representing a juvenile continental growth for the northeastern NCC. The granitic gneiss is indeed potassic granite and yielded a zircon U‐Pb date of ∼2.50 Ga, which is contemporaneous with the Jining–Jiaoliao microblock collision (2.53–2.49 Ga), implying another crustal growth event. The well‐developed gneissosity in 2.57–2.59 Ga dioritic and granodioritic gneisses together with the 2.5 Ga potassic granite, which crosscuts the gneissosity implies a 2.57–2.50 Ga (mainly 2.53–2.51 Ga) collisional orogeny, probably related to the Jining–Jiaoliao microblock collision. Our new geology and chronological results provide new evidence for the early Precambrian tectonic evolution of the NCC.

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A 2.5 Ga fore-arc subduction-accretion complex in the Dengfeng Granite-Greenstone Belt, Southern North China Craton

Cited by 69 publications

References 137 publications

Coexisting divergent and convergent plate boundary assemblages indicate plate tectonics in the Neoarchean

Coexisting divergent and convergent plate boundary assemblages indicate plate tectonics in the Neoarchean

Late Neoarchean crust-mantle geodynamics: Evidence from Pingquan Complex of the Northern Hebei Province, North China Craton

Petrogenesis of the Chaihulanzi Gneiss and its Tectonic Implications for the North China Craton

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