Archean-Paleoproterozoic crustal evolution of the Ordos Block in the North China Craton: Constraints from zircon U–Pb geochronology and Hf isotopes for gneissic granitoids of the basement

Zhang, Chengli; Diwu, Chunrong; Kröner, Alfred; Sun, Yong; Luo, Jing; Li, Qiuli; Gou, Longlong; Lin, Hongbing; Wei, Xinshan; Zhao, Jun‐Hong

doi:10.1016/j.precamres.2015.06.001

Cited by 85 publications

(19 citation statements)

References 115 publications

(164 reference statements)

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“…In contrast, the ages in this range have not been reported from the Yinshan Domain north of the Khondalite Belt. Therefore, the Khondalite Belt has been interpreted as the forearc of the Ordos Terrane, which represents the upper plate in the collision with the Yinshan Terrane, and the Yinshan Terrane as part of the lower plate subducting south or southeast (present co‐ordinates) at an active convergent plate margin (Figure a,b; Gou et al., ), which is consistent with the Hf model ages that require a juvenile input to the magmatism in the basement of the Ordos Basin (Zhang et al., ).…”

Section: Discussionsupporting

confidence: 75%

“…Younger Phanerozoic sedimentary rocks cover the older Precambrian basement (Hu et al., ; Yang, Li, & Ma, ). Recent borehole data have shown that the basement is dominated by Paleoproterozoic paragneisses, orthogneisses, and granitoids, and there is evidence from zircon Hf isotope compositions of Neoarchean crust in the source of some of these rocks (Hu et al., ; Wan, Xu, et al., ; Zhang et al., ). Recent studies have demonstrated that the rocks of the Khondalite Belt extend further south than previously thought onto the Ordos Block (Figure a; Gou et al., ; Wang et al., , ).…”

Section: Geological Settingmentioning

confidence: 99%

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Ultrahigh‐temperature metamorphism in the Helanshan complex of the Khondalite Belt, North China Craton: Petrology and phase equilibria of spinel‐bearing pelitic granulites

Gou

Liu

et al. 2018

Journal Metamorphic Geology

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To better understand the formation of ultrahigh‐temperature (UHT) metamorphic rocks, we present a detailed petrological study of the recently discovered spinel‐bearing garnet–sillimanite granulites in the Helanshan complex of the Khondalite Belt in the North China Craton. In calculated P–T pseudosections, isopleths of grossular content in the peak assemblage field of garnet+K‐feldspar+sillimanite+spinel+ilmenite+quartz+melt suggest that the metamorphic peak occurred at ∼960–1,030°C and 6.3–7.3 kbar. Using ternary feldspar thermometry, a minimum temperature limit of the peak metamorphic conditions is calculated to be ∼910–955°C at 6.5 kbar, with a weighted mean of ∼940°C. Thus, all these results point to a very steep geothermal gradient well into the UHT field. In addition, a clockwise P–T evolution is determined, which involves pre‐Tmax decompression followed by nearly isobaric cooling. Based on these newly discovered UHT pelitic granulites, which do not contain index minerals typically considered diagnostic of UHT metamorphism, and the high‐P pelitic granulites exposed in the Helanshan and Qianlishan complexes, we propose that the Khondalite Belt is an ultrahot metamorphic orogen formed by collision between the Yinshan and Ordos Terranes. The style of this continental collision was rather different from Phanerozoic collisions, but was similar to the two‐sided hot collision model during the Proterozoic. Two‐sided hot collision involves shallow slab breakoff during collision, which leads to extension and the development of a wide plateau‐like orogen, which is underlain by melt‐bearing mantle that maintains a hot environment at the collision zone.

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Section: Discussionsupporting

confidence: 75%

Section: Geological Settingmentioning

confidence: 99%

Ultrahigh‐temperature metamorphism in the Helanshan complex of the Khondalite Belt, North China Craton: Petrology and phase equilibria of spinel‐bearing pelitic granulites

Gou

Liu

et al. 2018

Journal Metamorphic Geology

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“…The NCC preserves ancient crustal relicts with ages of 3.8–3.1 Ga (Wan et al, ), containing rocks as old as ~3.85 Ga (Song et al, ). Numerous Neoarchean TTG gneisses, greenstones, and metamorphic supracrustal rocks recorded protolith crystallization ages of 27–2.8 and 2.4–2.6 Ga, and the former is considered as a major period of juvenile crustal growth (Diwu, Sun, Guo, Wang, & Liu, ; Liu, Yang, Santosh, & Aulbach, ; Xu & Zhang, and references therein; Zhang et al, ; Zhao & Zhai, ). The 2.4‐ to 2.6‐Ga rocks make up most of the Precambrian basement of the NCC (Zhao & Zhai, ).…”

Section: Discussionmentioning

confidence: 99%

“…(a) Precambrian rocks in the NCC. Data are from Diwu et al (2008Diwu et al ( , 2011Diwu et al ( , 2014, Wang (2007, 2010), Guan, Sun, Wilde, Zhou, and Zhai (2002), Kröner et al (2006), Liu et al (1992); Liu, Wang, et al (2009), Liu, Yang, Santosh, Aulbach, Zhou, et al (2015, Song et al (1996), Wang, Lu, Wang, and Chen (2013), Zhang et al (2015Zhang et al ( , 2012, Zhao et al (2008), Zhao, Cawood, Wilde, and Sum (2002), Zheng, Griffin, et al (2006), Zheng, Griffin, O'Reilly, and Lu (2004). (b) Precambrian rocks in the SCC.…”

Section: Implications For the Ancient Basement Evolutionmentioning

confidence: 99%

Basement evolution of the Sulu orogenic belt: Constraints on zircon U–Pb ages and trace elements from the Weihai gneisses

Lei

Xiang

2019

Geological Journal

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Early Paleoproterozoic rocks occur sporadically in the Sulu ultrahigh‐pressure (UHP) belt. The tectonic affinity and evolution of these rocks are still disputed. Two magmatic events (Early Paleoproterozoic and Neoproterozoic) and two metamorphic events (Late Paleoproterozoic and Triassic) were revealed by the zircon U–Pb ages and trace elements from the Weihai gneisses, which provide a key clue to understand the evolution of the Sulu orogen. The Early Paleoproterozoic zircons occur as residual zircons or zircon‐inherited cores in the two gneisses. They generally show oscillation zoning and enriched HREE patterns. The weighted mean age of the upper intercept age of these zircons is ~2.46 Ga, suggesting that the protolith of the ancient gneisses formed at ~2.46 Ga. The Late Paleoproterozoic zircons occur as metamorphic zircon core or mantle domains in the two gneisses and a quartzite. They generally show planar zoning or no zoning, with relative lower Th/U ratios. These zircons yield metamorphic ages of 1.8–1.84 Ga, which are consistent with the age of the Paleoproterozoic ultrahigh‐temperature metamorphism of the northern Sulu orogenic belt. The Neoproterozoic zircons occur as magmatic cores or mantles in the zircon grains of the two gneisses and their wall rocks. They show typical oscillatory zoning and enriched HREE patterns, yielding magmatic ages of ca. 740–787 Ma. The Neoproterozoic igneous rocks are the dominant basement rocks in the Sulu orogenic belt. Triassic UHP metamorphism has been well studied in the Sulu orogenic belt. Two Triassic age groups were also recognized here: 228–229 and 208 Ma, respectively. The Triassic zircons occur as metamorphic rims of the two ancient gneisses and their wall rocks. These two age ranges correspond to the time of subduction and exhumation of the the South China Craton (SCC) during the Triassic orogeny. This study provides solid evidence that the Weihai ancient gneisses have a strong affinity with the Yangtze Block. The protoliths of them are Paleoproterozoic (ca. 2.46 Ga) magmatic rocks. They were subsequently suffered from ca. 1.8‐ to 1.84‐Ga metamorphism, new crustal materials overgrowth during ca. 740‐ to 787‐Ma magmatism, and then experienced Triassic continental deep subduction and exhumation process to build the Sulu orogenic belt.

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“…The Ordos Block is supposed to be an Archean or Paleoproterozoic terrane (e.g. Gong et al, 2014;Wang et al, 2014;Tang et al, 2014;Hu et al, 2014;Zhang et al, 2015), mostly covered by Mesozoic-Cenozoic sedimentary rocks (Wan et al, 2013), while the Yinshan Block contains extensive exposures of Neoarchean rocks, with a main bimodal lithological assemblage of TTG and greenstone (Jian et al, 2005(Jian et al, , 2012Chen, 2007;Ma et al, 2013a,b;Zhang et al, 2014) and a structural style indicative of anti-clockwise metamorphic pressuretemperature-time paths (Zhao et al, 1999a(Zhao et al, ,b, 2003(Zhao et al, , 2012Zhao, 2009).…”

Section: Geological Setting and Samplingmentioning

confidence: 99%

The Neoarchean ultramafic–mafic complex in the Yinshan Block, North China Craton: Magmatic monitor of development of Archean lithospheric mantle

Wang

Guo

Huang

et al. 2015

Precambrian Research

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Archean-Paleoproterozoic crustal evolution of the Ordos Block in the North China Craton: Constraints from zircon U–Pb geochronology and Hf isotopes for gneissic granitoids of the basement

Cited by 85 publications

References 115 publications

Ultrahigh‐temperature metamorphism in the Helanshan complex of the Khondalite Belt, North China Craton: Petrology and phase equilibria of spinel‐bearing pelitic granulites

Ultrahigh‐temperature metamorphism in the Helanshan complex of the Khondalite Belt, North China Craton: Petrology and phase equilibria of spinel‐bearing pelitic granulites

Basement evolution of the Sulu orogenic belt: Constraints on zircon U–Pb ages and trace elements from the Weihai gneisses

The Neoarchean ultramafic–mafic complex in the Yinshan Block, North China Craton: Magmatic monitor of development of Archean lithospheric mantle

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