Geochemistry of Neoarchean mafic volcanic rocks and late mafic dikes in the Zanhuang Complex, Central Orogenic Belt, North China Craton: Implications for geodynamic setting

Deng, Hao; Kusky, Timothy M.; Polat, Ali; Wang, Lu; Wang, Junpeng; Wang, Songjie

doi:10.1016/j.lithos.2013.05.007

Cited by 68 publications

(22 citation statements)

References 93 publications

(171 reference statements)

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“…The orogen-craton-orogen cycle differs from the classic Wilson Cycle in that it starts with an accretionary orogen, evolves into a craton, then is reworked to become an orogen again, whereas the Wilson Cycle starts with a continent, rifts it, and then ends with a continent-continent collision. We here focus on part of that cycle, from 2.7 to 2.5 Ga, which saw a period of rifting of the Eastern Block from a larger continent, formation of a passive margin, then collision of this passive margin with an arc at 2.5 Ga (Kusky and Li 2003;Deng et al 2013;Wang et al 2013). The continent-continent collision happened later, with various groups suggesting soon after 2.5 Ga, at 2.3, 2.1, and at 1.85 Ga.…”

Section: North China Cratonmentioning

confidence: 99%

“…These rocks have been interpreted as a foreland basin sequence by Kusky and Li (2003), Li and Kusky (2007), Wang et al (2013), and Deng et al (2013), and as a rift sequence by Lv et al (2012). This foreland basin sequence is interpreted to be related to an arc-continent collision at ca.…”

Section: Continental Rifting To Passive Margin Stagementioning

confidence: 99%

“…In the southern Zanhuang massif of Taihang Mountain, the basement of the Eastern Block and the overlying passive margin sequence are imbricated together with a tectonic mélange belt, then overthrust by tonalite-trondhjemitegranodiorite (TTG) gneiss of the Western Zanhuang Domain in the COB that represent the plutonic section of the Archean arc that collided with the Eastern Block (Kusky and Li 2003;Deng et al 2013;Wang et al 2013). It is difficult to estimate the original thickness of the passive margin sequence because of the complex structure, but some sections include >500 m of marble, metapelite, and quartzite .…”

Section: Arc-continent Collision Stagementioning

confidence: 99%

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Are Wilson Cycles preserved in Archean cratons? A comparison of the North China and Slave cratons

Kusky

Wang

et al. 2014

Can. J. Earth Sci.

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A review and comparison of the tectonic history of the North China and Slave cratons reveal that the two cratons have many similarities and some significant differences. The similarities rest in the conclusion that both cratons have a history of a Wilson Cycle, having experienced rifting of an old continent in the late Archean, development of a rift to passive margin sequence, collision of this passive margin with arcs within 100-200 Ma of the formation of the passive margin, reversal of subduction polarity, then eventual climactic collision with another arc terrane, microcontinental fragment, or continent. This cycle demonstrates the operation of Paleozoic-style plate tectonics in the late Archean. The main differences lie in the later tectonic evolution. The Slave's post-cratonization history is dominated by subduction dipping away from the interior of the craton, and later incorporation into the interior of a larger continent, whereas the North China Craton has had a long history of subduction beneath the craton, including presently being located above the flat-lying Pacific slab resting in the mantle transition zone, placing it in a broad back-arc setting, with multiple mantle hydration events and collisions along its borders. The hydration enhances melting in the overlying mantle, and leads to melts migrating upwards to thermochemically erode the lithospheric root. This major difference may explain why the relatively small Slave craton preserves its thick Archean lithospheric root, whereas the eastern North China Craton has lost it.Résumé : Une étude comparative de l'historique tectonique des cratons de Chine septentrionale et des Esclaves révèle qu'ils ont plusieurs points en commun mais aussi des différences significatives. Pour ce qui est des similitudes, les deux cratons ont connu un cycle de Wilson, ayant en effet subi la distension d'un ancien continent à l'Archéen tardif, le développement d'une séquence de distension à bordure passive, la collision de cette bordure passive avec des arcs, moins de 100-200 Ma après sa formation, le renversement de la polarité de subduction, puis l'éventuelle collision climacique avec un autre terrane d'arc, un fragment de microcontinent ou un continent. Cela démontre le fonctionnement de la tectonique des plaques, de style Paléozoïque, à l'Archéen tardif. Les différences principales se trouvent dans la suite de l'évolution tectonique. L'historique post-cratonisation du craton des Esclaves est dominé par une subduction dont le pendage s'éloigne de l'intérieur du craton, puis par son incorporation à l'intérieur d'un grand continent. Par contre, le craton de Chine septentrionale a un long historique de subduction sous le craton, incluant le fait qu'il est actuellement situé au-dessus de la dalle couchée à plat du Pacifique, dans la zone de transition du manteau, le plaçant dans un vaste environnement d'arrière-arc, avec de nombreux épisodes d'hydratation et de collisions le long de ses bordures. L'hydratation contribue à la fusion dans le manteau sus-jacent et soutient la ...

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Section: North China Cratonmentioning

confidence: 99%

Section: Continental Rifting To Passive Margin Stagementioning

confidence: 99%

Section: Arc-continent Collision Stagementioning

confidence: 99%

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Are Wilson Cycles preserved in Archean cratons? A comparison of the North China and Slave cratons

Kusky

Wang

et al. 2014

Can. J. Earth Sci.

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“…Furthermore, the positive correlation between TiO 2 and Zr contents (Fig. 11) could suggest that Fe-Ti oxides minerals were not significant mineral phase during fractionation (Ordóñez-Calderón et al 2011;Deng et al 2013).…”

Section: Magma Generationmentioning

confidence: 99%

Geochemical and isotopic evidence for Carboniferous rifting: mafic dykes in the central Sanandaj-Sirjan zone (Dorud-Azna, West Iran)

Shakerardakani¹,

Neubauer²,

Bernroider³

et al. 2017

Geologica Carpathica

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Abstract:In this paper, we present detailed field observations, chronological, geochemical and Sr-Nd isotopic data and discuss the petrogenetic aspects of two types of mafic dykes, of alkaline to subalkaline nature. The alkaline mafic dykes exhibit a cumulate to foliated texture and strike NW-SE, parallel to the main trend of the region. The 40 Ar/ 39 Ar amphibole age of 321.32 ± 0.55 Ma from an alkaline mafic dyke is interpreted as an indication of Carboniferous cooling through ca. 550 °C after intrusion of the dyke into the granitic Galeh-Doz orthogneiss and Amphibolite-Metagabbro units, the latter with Early Carboniferous amphibolite facies grade metamorphism and containing the Dare-Hedavand metagabbro with a similar Carboniferous age. The alkaline and subalkaline mafic dykes can be geochemically categorized into those with light REE-enriched patterns [(La/Yb) N = 8.32-9.28] and others with a rather flat REE pattern [(La/Yb) N = 1.16] and with a negative Nb anomaly. Together, the mafic dykes show oceanic island basalt to MORB geochemical signature, respectively. This is consistent, as well, with the (Tb/Yb) PM ratios. The alkaline mafic dykes were formed within an enriched mantle source at depths of ˃ 90 km, generating a suite of alkaline basalts. In comparison, the subalkaline mafic dykes were formed within more depleted mantle source at depths of ˂ 90 km. The subalkaline mafic dyke is characterized by 87 Sr/ 86 Sr ratio of 0.706 and positive ɛ Nd (t) value of + 0.77, whereas 87 Sr/ 86 Sr ratio of 0.708 and ɛ Nd (t) value of + 1.65 of the alkaline mafic dyke, consistent with the derivation from an enriched mantle source. There is no evidence that the mafic dykes were affected by significant crustal contamination during emplacement. Because of the similar age, the generation of magmas of alkaline mafic dykes and of the Dare-Hedavand metagabbro are assumed to reflect the same process of lithospheric or asthenospheric melting. Carboniferous back-arc rifting is the likely geodynamic setting of mafic dyke generation and emplacement. In contrast, the subalkaline mafic sill is likely related to the emplacement of the Jurassic Darijune gabbro.

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“…This feature is consistent with the fractionation of olivine, pyroxene and plagioclase (e.g., Ordóñez-Calderón et al 2011). In addition, TiO 2 and V abundances increase with increasing Zr contents suggest that Fe-Ti oxides (ilmenite and titanomagnetite) were not significant mineral phases during fractionation (e.g., Ordóñez-Calderón et al 2011;Deng et al 2013). Nevertheless, it is uncertain whether such covariations between the major and trace elements indicate fractional crystallization of basaltic magmas or reflect the nature of magma sources.…”

Section: Magma Sourcementioning

confidence: 99%

Tectonic significance of Triassic mafic rocks in the June Complex, Sanandaj–Sirjan zone, Iran

et al. 2017

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This study concentrates on the petrological and geochemical investigation of mafic rocks embedded within the voluminous Triassic June Complex of the central Sanandaj-Sirjan zone (Iran), which are crucial to reconstruct the geodynamics of the Neotethyan passive margin. The Triassic mafic rocks are alkaline to sub-alkaline basalts, containing 43.36-49.09 wt% SiO 2 , 5.19-20.61 wt% MgO and 0.66-4.59 wt% total alkalis. Based on MgO concentrations, the mafic rocks fall into two groups: cumulates (Mg# = 51.61-58.94) and isotropic basaltic liquids (Mg# = 24.54-42.66). In all samples, the chondrite-normalized REE patterns show enrichment of light REEs with variable (La/Yb) N ratios ranging from 2.48 to 9.00, which confirm their amalgamated OIB-like and E-MORB-like signatures. Enrichment in large-ion lithophile elements and depletion in high field strength elements (HFSE) relative to the primitive mantle further support this interpretation. No samples point to crustal contamination, all having undergone fractionation of olivine ? clinopyroxene ? plagioclase. Nevertheless, elemental data suggest that the substantial variations in (La/Sm) PM and Zr/Nb ratios can be explained by variable degrees of partial melting rather than fractional crystallization from a common parental magma. The high (Nb/Yb) PM ratio in the alkaline mafic rocks points to the mixing of magmas from enriched and depleted mantle sources. Abundant OIB alkaline basalts and rare E-MORB appear to be linked to the drifting stage on the northern passive margin of the Neotethys Ocean.

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Geochemistry of Neoarchean mafic volcanic rocks and late mafic dikes in the Zanhuang Complex, Central Orogenic Belt, North China Craton: Implications for geodynamic setting

Cited by 68 publications

References 93 publications

Are Wilson Cycles preserved in Archean cratons? A comparison of the North China and Slave cratons

Are Wilson Cycles preserved in Archean cratons? A comparison of the North China and Slave cratons

Geochemical and isotopic evidence for Carboniferous rifting: mafic dykes in the central Sanandaj-Sirjan zone (Dorud-Azna, West Iran)

Tectonic significance of Triassic mafic rocks in the June Complex, Sanandaj–Sirjan zone, Iran

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