Zircon U–Pb geochronology, geochemistry, and Sr–Nd isotopes of the Ural–Alaskan type Tuerkubantao mafic–ultramafic intrusion in southern Altai orogen, China: Petrogenesis and tectonic implications

Deng, Yu-Feng; Yuan, Feng; Zhou, Taofa; White, Noel C.; Zhang, Dayu; Guo, Xuji; Zhang, Ruofei; Zhao, Bingbing

doi:10.1016/j.jseaes.2015.05.007

Cited by 14 publications

(3 citation statements)

References 138 publications

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“…18a, b). The negligible influence on the mantle by carbonatite can also be evidenced by the absence of calcite disseminations in the Shangzhung intrusion, unlike some intrusions that have been affected by carbonatite, such as those Alaskan-type ultramafic or mafic intrusions in arc settings with calcite disseminations/a calcium-rich signature (Eyuboglu et al 2010; Deng et al 2015 a ; Teng, Yang & Santosh, 2015), which is also consistent with their alkaline signature other than calc-alkaline affinity (Fig. 10a, b).…”

Section: Discussionmentioning

confidence: 99%

The Early Cretaceous Shangzhuang layered mafic intrusion and its bearing on decratonization of the North China Craton

2017

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The North China Craton (NCC) is one of the classic examples of decratonization through extensive lithospheric destruction during Mesozoic time. Among the various pulses of magmatism associated with cratonic erosion are the rare mafic intrusions in the Yanshan Belt. Here we investigate the Shangzhuang layered intrusion belonging to this suite, which is characterized by compositional layering with troctolite, noritic gabbro and gabbro/gabbroic anorthosite/gabbrodiorite from the bottom to top. The different lithologies of this intrusion exhibit close field relationships, similar chemical patterns and overall identical Lu–Hf isotopes indicating a co-magmatic nature. The fine-grained gabbros occurring near the margin of the intrusion display U–Pb ages similar to those of the other rocks and are considered to represent the composition of the parent magma, characterized by Fe, Mg and Ti enrichment. The magma was sourced from low-degree partial melting of spinel lherzolite sub-continental lithospheric mantle, which had been enriched by crust–mantle interaction and metasomatic fluids derived from the Mongolian oceanic slab subduction beneath the NCC during Late Palaeozoic time. In addition, limited asthenospheric or deeper-mantle materials were also locally mixed with the enriched mantle as the final source component. Our zircon U–Pb data constrain the emplacement age of this intrusion as c. 128–123 Ma in Early Cretaceous time, and correlates with the regional extensional tectonics between c. 135 and 115 Ma in the eastern and central NCC. Mantle upwelling associated with this event resulted in the thermal and chemical erosion of the lithospheric mantle, and emplacement of the parent magma of this layered intrusion.

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Section: Discussionmentioning

confidence: 99%

The Early Cretaceous Shangzhuang layered mafic intrusion and its bearing on decratonization of the North China Craton

2017

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“…The South Chinese Altai terrane is composed of the Middle Devonian fossil‐bearing metasedimentary rocks (Li et al., 2017; Song, Xiao, Chen, et al., 2020; Wang et al., 2012) and several Late Devonian ultramafic‐mafic blocks (Deng et al., 2015; Wang et al., 2012), and they are intruded by the earliest Carboniferous granitic plutons (Wang et al., 2012). The metasedimentary rocks have a typical block‐in‐matrix structure and are interpreted as an accretionary complex of the Devonian active continental margin of the South Chinese Altai terrane (Song, Xiao, Chen, et al., 2020; Wang et al., 2012).…”

Section: Geological Settingmentioning

confidence: 99%

“…As the southwestern accretionary margin of the consolidated Siberian continent, the Neoproterozoic–Late Paleozoic Altai terranes were accreted to the Siberian continent during Ediacaran–Devonian, and they are composed of four major units, including Gorny Altai subduction‐accretionary complexes, Rudny Altai island arcs, Altai‐Mongolian continental arcs and Kalba‐Narym passive margin deposits (Buslov et al., 2004; Kuibida et al., 2016; Safonova, 2014; Windley et al., 2007). The Late Paleozoic northward subduction of the Irtysh‐Zaisan Ocean produced a series of magmatic arcs and arc‐related basins in the South Chinese Altai terrane on the southern margin of the Altai‐Mongolian terrane (Buslov et al., 2004; Deng et al., 2015; Safonova et al., 2012, 2018; Sun et al., 2008; Wang et al., 2006; Yuan et al., 2007). The subduction was probably terminated in the Late Devonian, followed by Late Devonian–Early Carboniferous passive margin deposits in the Kalba‐Narym terrane (Buslov et al., 2004; Safonova, 2014) and an Early Carboniferous magmatic quiescence in the southern margin of the Altai terranes (Tong et al., 2014; Wang et al., 2006).…”

Section: Geological Settingmentioning

confidence: 99%

The Serpukhovian–Bashkirian Amalgamation of Laurussia and the Siberian Continent and Implications for Assembly of Pangea

Han

Liao

et al. 2022

Tectonics

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The final assembly of Pangea is thought to be marked by the Siberia‐Laurussia amalgamation during the Late Carboniferous–Permian, but there are large uncertainties on the timing of the amalgamation in the previous paleogeographic reconstructions because there are no high‐quality Carboniferous–Permian paleomagnetic data available from the Siberian continent. The Zharma‐Saur area in the junction between the Siberia‐Laurussia amalgamation, involving the Zharma‐Saur arc on the northern margin of the Kazakhstan microcontinent, the South Chinese Altai terrane in the southern margin of the Siberian continent and the Irtysh‐Zaisan suture in between, can provide crucial geological constraints for the assembly of Pangea. In the Zharma‐Saur arc, the Tournaisian–Visean marine sequences are interbedded with thick pillow lavas, which were formed during southward subduction of the Irtysh‐Zaisan Ocean and unconformably covered by the Moscovian terrestrial bimodal volcanic associations and sedimentary successions, in which the basalts are columnar‐jointed in structure and the sandstones also contain the detritus derived from the South Chinese Altai terrane. The Serpukhovian–Bashkirian unconformity was coeval with the transition from the Tournaisian–Visean calc‐alkaline to the Moscovian–Early Permian high alkaline and bimodal volcanism. These dramatic changes in sedimentary environments, provenances and volcanism together indicate the Siberia‐Laurussia amalgamation during the Serpukhovian–Bashkirian and this event was almost simultaneous with the Laurussia‐Gondwana collision and the welding of Laurussia with the Kazakhstan microcontinent, but slightly earlier than the Laurussia‐Tarim collision. Therefore, the final assembly of Pangea could be completed in the Late Carboniferous.

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Tectonics of the Central Asian Orogenic Belt and its Pacific analogues

Xiao

Kusky

Safonova

et al. 2015

Journal of Asian Earth Sciences

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Zircon U–Pb geochronology, geochemistry, and Sr–Nd isotopes of the Ural–Alaskan type Tuerkubantao mafic–ultramafic intrusion in southern Altai orogen, China: Petrogenesis and tectonic implications

Cited by 14 publications

References 138 publications

The Early Cretaceous Shangzhuang layered mafic intrusion and its bearing on decratonization of the North China Craton

The Early Cretaceous Shangzhuang layered mafic intrusion and its bearing on decratonization of the North China Craton

The Serpukhovian–Bashkirian Amalgamation of Laurussia and the Siberian Continent and Implications for Assembly of Pangea

Tectonics of the Central Asian Orogenic Belt and its Pacific analogues

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