Geochronology, mantle source composition and geodynamic constraints on the origin of Neoarchean mafic dikes in the Zanhuang Complex, Central Orogenic Belt, North China Craton

Deng, Hao; Kusky, Timothy; Polat, Ali; Wang, Junpeng; Wang, Lu; Fu, Jianmin; Wang, Zhensheng; Yuan, Ye

doi:10.1016/j.lithos.2014.07.011

Cited by 69 publications

(23 citation statements)

References 86 publications

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“…Recently, Kusky and coauthors suggested that crustal growth in the North China Craton occurred in a sequential, clockwise direction through the development of a series of sutures at 2.7 Ga, 2.5 Ga, 2.43 Ga, 2.3 Ga, and 1.9 Ga [ Kusky et al ., ]. A major ~2.5 Ga suture zone constitutes the Central Orogenic Belt, which records final end Archean collision between the N‐S trending late Archean Wutai/Fuping arc and the Eastern Block [ Deng et al ., ]. Basement rocks in the Eastern Block have yielded ages mainly in the range of ~2.6 to 2.5 Ga with subordinate dates at ~2.7 Ga, along with some ~3.8 to 2.8 Ga crustal relics [ Nutman et al ., ; Zhai and Santosh , ; Wan et al ., ; Guo et al ., ].…”

Section: Geological Backgroundmentioning

confidence: 99%

Cyclic formation and stabilization of Archean lithosphere by accretionary orogenesis: Constraints from TTG and potassic granitoids, North China Craton

et al. 2017

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Accretionary orogens are major sites of modern continental growth, yet their role in the development of Archean continental crust remains enigmatic. Diverse granitoid suites from tonalite‐trondhjemite‐granodiorite (TTG) to potassic granitoids appeared during late Archean, representing a period of major continental formation and stabilization. In this study, whole‐rock geochemical and zircon U‐Pb and Lu‐Hf isotopic data are reported for Neoarchean granitoid gneisses from the Northern Liaoning Terrane, northeastern North China Craton (NCC). Older granitoid gneisses (~2592–2537 Ma) define three magmatic zones migrating from southeast to northwest, each showing a common magmatic evolution from high‐pressure TTGs to medium‐/low‐pressure TTGs and potassic granitoids. They have depleted zircon ƐHf(t) of +0.5 to +8.7. Younger ~2529–2503 Ma potassic granitoids and TTGs occur throughout the terrane, which are marked by variable zircon ƐHf(t) of −4.7 to +8.1, and are coeval with regional high‐grade metamorphism. Petrogenetic modeling and changing Sr/Y and (La/Yb)N of the granitoids suggest that the crust experienced episodic thickening and thinning and became progressively evolved through development of potassic granitoids and sedimentary successions. The metavolcanic basement to the granitoids display tholeiitic to calc‐alkaline affinities, together with the top‐to‐the‐northwest thrusting and associated volcanogenic massive sulfide‐type Cu‐Zn deposits, suggesting cyclic crustal formation of Northern Liaoning within an accretionary orogen with a SE‐dipping subduction polarity. Cyclic crustal thickening and thinning is related to tectonic switching from advancing to retreating relations between the downgoing and overriding plate. After ~2530 Ma, this accretionary system accreted to the ancient continental nucleus of NCC (Anshan‐Benxi Terrane), signifying final lithosphere stabilization.

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Section: Geological Backgroundmentioning

confidence: 99%

Cyclic formation and stabilization of Archean lithosphere by accretionary orogenesis: Constraints from TTG and potassic granitoids, North China Craton

et al. 2017

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“…Owing to its robustness and reliability as a geochronometer, zircon has been employed to establish crystallization ages of mafic intrusives, including gabbros and dolerites (e.g. Ring et al, 2002;Deng et al, 2014;Campanha et al, 2015), in cases where relatively uniform age populations are present within the respective rock. Curiously, it must be considered unlikely for zircon to crystallize from a mafic (SiO 2 <52 wt%) melt under temperature conditions prevalent in the crust at the time of emplacement, since zircon requires the precipitating melt to attain unrealistically high Zr contents, in excess of 5000 ppm, for zircon saturation (Boehnke et al, 2013).…”

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confidence: 99%

Zircon in amphibolites from Naxos, Aegean Sea, Greece: origin, significance and tectonic setting

Bolhar

Ring

Ireland

2016

Journal Metamorphic Geology

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We report U–Pb zircon ages of c. 700–550 Ma, 262–220 Ma, 47–38 Ma and 15–14 Ma from amphibolites on Naxos Island in the Aegean extensional province of Greece. The zircon has complex internal structures. Based on cathodoluminescence response, zoning and crosscutting relationships a minimum of four zircon growth stages are identified: inherited core, magmatic core, inner metamorphic (?) rim and an outer metamorphic rim. Trace element compositions of the amphibolites suggest igneous differentiation and crustal assimilation. Zircon solubility as a function of saturation temperatures, Zr content and melt composition indicates that the zircon did not originally crystallize in the mafic bodies but was inherited from felsic precursor rocks, and subsequently assimilated into the mafic intrusives during emplacement. Zircon inheritance is corroborated by the complex, xenocrystic nature of the zircon in one sample. Ages of c. 700–550 Ma and 262–220 Ma are assigned to inherited zircon. Available geochemical data suggest that the 15–14 Ma metamorphic rims grew in situ in the amphibolites, corresponding to a high‐grade metamorphic event at this time. However, the geochemical data cannot conclusively establish if the c. 40 Ma zircon rims also grew in situ, or whether they were inherited along with the xenocrystic cores. Two scenarios for emplacement of the mafic intrusives are discussed: (i) Intrusion during late‐Triassic to Jurassic ocean basin development of the Aegean realm, in which case the 40 Ma zircon rims would have grown in situ, and (ii) emplacement in the Miocene as a result mafic underplating during large‐scale extension. In this case, only the 15–14 Ma metamorphic outer rims would have formed in situ in the amphibolitic host rocks.

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“…Later, they revised the model so that both oceans closed at ~1,880 Ma (Trap et al, ; Trap et al, ). Another group of scholars (Deng et al, ; Deng et al, ; Kusky et al, ; Wang et al, , ; Wang, Cawood, et al, ; Wang, Kusky, et al, ; Wang, Kusky, et al, ) suggested that the WZD belongs to the Fuping arc, and the western part of the CZD (or the Guandu Group) was a ~2.5 Ga tectonic mélange belt and suture between the Eastern Block and the Fuping arc, suggesting an arc–continent collision in the late Neoarchaean. Li, Santosh, Teng, and He (, ) and Tang, Santosh, Tsunogae, and Maruoka (, ) proposed a model in which the Eastern Block and the Zanhuang arc collided at ~2.3 Ga, followed by back‐arc extension and rifting.…”

Section: Discussionmentioning

confidence: 99%

“…The Zanhuang Massif/Complex (Figure ) is located in the central part of NCC (Zhao et al, ) and occupies an area of approximately 3,850 km 2 (Niu, Xu, & Guo, ). Like other Precambrian basement sections in the NCC, the TTG gneisses are predominant, with a few K‐feldspar granite and monzogranite bodies and some supracrustal rocks (metavolcanic and metasedimentary rocks; BGMRHP, ; Deng et al, ; Deng et al, ; Wang et al, ; Wang, Kusky, et al, ; Xiao, Liu, & Chen, ; Yang et al, , ; Yang et al, ). All these rocks are locally unconformably overlain by sedimentary rocks of the Changcheng Group (BGMRHP, ).…”

Section: Geological Backgroundmentioning

confidence: 98%

“…The Archaean Zanhuang Group (sensu stricto) mainly includes paragneiss, amphibolite, and metapelite with local kyanite‐garnet‐bearing felsic gneiss (Xiao, Jiang, et al, ; Xiao, Wu, Zhao, Guo, & Ren, ). The Guandu Group is mainly composed of amphibolite, marble, quartzite, and metapelite with a formation age of ~2.5 Ga or early Palaeoproterozoic (Deng et al, ; Wang et al, ; Yang et al, , ) and underwent greenschist facies to lower amphibolite facies metamorphism at 1.85–1.90 Ga (Trap et al, ; Xiao et al, ). The Gantaohe Group includes a large amount of mafic volcanic‐sedimentary rocks deposited between 2.1–1.9 Ga and has undergone greenschist‐facies metamorphism (BGMRHP, ; Du, Yang, Wyman, Nutman, Lu, Song, Zhao, et al, ; Liu et al, ; Xie et al, ; Yang et al, ).…”

Section: Geological Backgroundmentioning

confidence: 99%

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Zircon U–Pb ages and geochemistry of the late Archaean granitoids in the Zanhuang Complex: Records of an arc–continent collision event at the end of Archaean

Zhang

Wang

et al. 2019

Geological Journal

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The late Archaean witnessed a critical transition of the composition of the continental crust from predominantly sodic tonalite‐trondhjemite‐granodiorites (TTGs) to a combination of TTGs and increasing proportion of potassic calc‐alkaline granitoids. This shift is also well recorded in the Zanhuang Complex located in the central part of the North China Craton (NCC). In this work, we present a detailed geochemical study of these granitoids and subdivide them into four groups, that is, TTGs, sanukitoids, crustal‐sourced granitoids, and hybrid granitoids. The TTGs in the Zanhuang Complex may have formed at a longer and earlier period during ~2.7 to ~2.5 Ga as the first stage. They show typical TTG characteristics, such as high SiO2, Na2O, and Sr/Y and depletion of Nb, Ta, Ti, and HREE. The TTGs are interpreted to have formed in a subduction‐related environment. The other three groups of granitoids formed at a shorter and later stage. The sanukitoid sample shows high MgO and Mg# and other geochemical signatures of typical Archaean sanukitoid affinity, yielding a weighted mean zircon 207Pb/206Pb age of 2,517 ± 5 Ma as the crystallization age. The sanukitoid magma derived from partial melting of a hydrous mantle peridotite source metasomatized by slab‐derived melts or fluids. The crustal‐sourced granitoids, including a new sample (~2,510 Ma) in this work, the Jiandeng granite (~2,490 Ma), and the Huangcha/Wangjiazhuang granite (2,488 to 2,517 Ma) show signatures of a mainly crustal source such as high SiO2 and K2O, low MgO and Mg# values, and weakly peraluminous. The hybrid granitoids represented by the Haozhuang granitoid (2,511 to 2,528 Ma) are characterized by enrichment in both incompatible (LILE and LREE) and compatible (Mg, Ni, and Cr) elements and may have formed by mixing/contamination of multiple magmas or sources. The temporal and spatial distributions of these groups of granitoids indicate that the Zanhuang Complex experienced a subduction–collision event between the Fuping arc and the Eastern Block of the NCC at the end of Archaean.

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Geochronology, mantle source composition and geodynamic constraints on the origin of Neoarchean mafic dikes in the Zanhuang Complex, Central Orogenic Belt, North China Craton

Cited by 69 publications

References 86 publications

Cyclic formation and stabilization of Archean lithosphere by accretionary orogenesis: Constraints from TTG and potassic granitoids, North China Craton

Cyclic formation and stabilization of Archean lithosphere by accretionary orogenesis: Constraints from TTG and potassic granitoids, North China Craton

Zircon in amphibolites from Naxos, Aegean Sea, Greece: origin, significance and tectonic setting

Zircon U–Pb ages and geochemistry of the late Archaean granitoids in the Zanhuang Complex: Records of an arc–continent collision event at the end of Archaean

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