Petrogenesis of Paleo-Mesoproterozoic mafic rocks in the southwestern Yangtze Block of South China: Implications for tectonic evolution and paleogeographic reconstruction

Lu, Gui-Mei; Wang, Wei; Ernst, Richard E.; Söderlund, Ulf; Lan, Zu-Fan; Huang, Si-Fang; Xue, Er-Kun

doi:10.1016/j.precamres.2018.12.019

Cited by 62 publications

(20 citation statements)

References 109 publications

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“…5; Table 1; e.g., Greentree and Li, 2008;Zhao et al, 2010;Chen W T et al, 2013;. Coeval or slightly younger mafic intrusions and A-type granites are also common in the region (e.g., Chen W T et al, 2013;Zhu et al, 2017;Lu et al, 2019), which along with the associated volcanic rocks document extensive late Paleoproterozoic to early Mesoproterozoic magmatism in the southwestern Yangtze Block. grouped these rocks into two major magmatic phases at 1.73-1.71 Ga and 1.69-1.65 Ga, but some minor 1.5-1.3 Ga magmatism also occurred ( Fig.…”

Section: Late Paleoproterozoic To Early Mesoproterozoic Successions Amentioning

confidence: 99%

Nature and Evolution of Pre‐Neoproterozoic Continental Crust in South China: A Review and Tectonic Implications

Kai

Dong

Yao

et al. 2020

Acta Geologica Sinica (Eng)

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South China as an amalgamation of the Yangtze and Cathaysia blocks is composed of Archean to Mesoproterozoic basement overlain by Neoproterozoic and younger cover. Both the constituent Yangtze and Cathaysia blocks contain well‐preserved Neoproterozoic rocks that have been extensively studied in terms of the age and tectonic nature, but less is known about their earlier crustal history due to the incomplete rock record. Recent efforts in investigating the yet survived crustal nature based on isotopic and elemental signatures preserved in igneous and sedimentary rocks have steadily improved our knowledge about the pre‐Neoproterozoic continental crustal evolution in South China. In this paper, we summarize the up‐to‐date pre‐Neoproterozoic records, including petrological, geochronological, geochemical and geophysical data, across South China, and discuss its spatiotemporal patterns of the pre‐Neoproterozoic crust and the relevant tectonic events. While the xenocrystic/inherited and detrital zircon records suggest widespread Archean (mainly ca. 2.5 Ga) crustal components within both the Yangtze and Cathaysia blocks, exposed Archean rocks are only limited to isolated crustal provinces in the Yangtze Block. These Archean rocks are dominated by TTGs (tonalite‐trondhjemite‐granodiorite) with varied ages (3.3–2.5 Ga) and zircon Hf isotopes, indicating a compositionally heterogeneous nature of the Archean Yangtze Block and, by inference, the development of multiple ancient terranes. The early Paleoproterozoic (2.4–2.2 Ga) tectonomagmatic events characterize the western Yangtze Block and are supportive of an east‐west subdivision of the Yangtze basement, whereas the late Paleoproterozoic (2.1–1.7 Ga) orogeneses may have affected a larger area covering both the western and eastern parts of the Yangtze Block, and also the Cathaysia Block. The eastern Yangtze Block with generally northeastward‐younging late Paleoproterozoic magmatism and metamorphism likely experienced a prolonged 2.05–1.75 Ga orogenic process welding the various Archean proto‐continents, consistent with the documentation of a buried late Paleoproterozoic orogenic belt imaged by deep seismic profiling from its central part and of a slightly older ophiolitic mélange in the northern part. The Cathaysia Block was probably involved in a short‐lived 1.9–1.8 Ga orogenic event. The two orogeneses overlapped in time and may have contributed to the cratonization of a possible unified South China, and are referred to be linked with the assembly of the Nuna Supercontinent. The subsequent late Paleoproterozoic to early Mesoproterozoic rift successions and intrusions (1.7–1.5 Ga) in the southwestern Yangtze Block, and the ca. 1.43 Ga rifting in Hainan Island of the Cathaysia Block could be responses to the Nuna break‐up. Late Mesoproterozoic (1.2–1.0 Ga) magmatism of varied age and nature in different localities of the Yangtze Block is reflective of a complex tectonic process in the context of the assembly of the Rodinia Supercontinent. Similar‐aged metamorphism (...

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Section: Late Paleoproterozoic To Early Mesoproterozoic Successions Amentioning

confidence: 99%

Nature and Evolution of Pre‐Neoproterozoic Continental Crust in South China: A Review and Tectonic Implications

Kai

Dong

Yao

et al. 2020

Acta Geologica Sinica (Eng)

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“…Potassic granite refer to K-rich granites in the Archean, other granite include all kinds of granite after Archean. Data sources are as follows: Phan Si Pan Complex (Nam et al, 2003;Lan et al, 2001;Anh et al, 2015; and this study; Dongchuan Area (Chen et al, 2013;Cui et al, 2018;Lu et al, 2019); Houhe Complex (Wu et al, 2012); Yudongzi Complex (Chen et al, 2019;Hui et al, 2017;; Douling Complex (Hu et al, 2013;Wu et al, 2014); Zhongxiang Complex (Wang et al, 2018b;Z. Wang et al, , 2018Zhou et al, 2017Zhou et al, , 2015Zhang et al, 2011); Kongling Complex (Wu et al, 2009;Guo et al, 2018Guo et al, , 2015Han et al, 2018;Jiao et al, 2009;Peng et al, 2009Peng et al, , 2012Xiong et al., 2009;Yin et al, 2013); and Tongbai, Huangtuling, Dongling areas (Sun et al, 2008;Wu et al, 2008;Xiang et al, 2014) .…”

Section: Resultsmentioning

confidence: 89%

Neoarchean and Paleoproterozoic K-rich granites in the Phan Si Pan Complex, north Vietnam: Constraints on the early crustal evolution of the Yangtze Block

Zhao

Cawood

Wang

et al. 2019

Precambrian Research

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Precambrian igneous and metamorphic rocks of the Phan Si Pan Complex, North Vietnam, constitute the southern extension of the Yangtze Block, and provide a valuable record of the early evolution of the continental crust. We present results of U-Pb zircon geochronology and geochemistry for Precambrian granites in this complex to constrain their emplacement age and genesis. Granites from three plutonic bodies yielded ages of 2848 ± 15 Ma, 2768 ± 19 Ma and 1869 ± 30 Ma, which represent newly-recognized late Archean to the disparate terranes and final cratonization of the Yangtze Block overlaps with, and may be related to, assembly of the Nuna supercontinent.

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“…There are two contrasting views of the driving force for supercontinent breakup, involving either the development of encircling subduction zones along the supercontinent margins or by mantle plumes within the supercontinent (Cawood et al, 2016; Ernst et al, 2008; Li et al, 2019). Massive late Paleoproterozoic to early Mesoproterozoic mafic igneous rocks, which were considered to be produced in intracontinental rift setting, are exposed in the southwestern Yangtze Block (e.g., Chen et al, 2013; Liu et al, 2019; Lu et al, 2019; Zhao, Zhou, & Zheng, 2010; Zhao, Zhou, Li, et al, 2010). We conclude that this mafic magmatism is related to the early breakup of the Nuna supercontinent, triggered by mantle plumes within crustal blocks.…”

Section: Discussionmentioning

confidence: 99%

“…However, there is robust geological evidence showing that the Yangtze Block was involved in the assembly and breakup of the Nuna supercontinent. This includes the presence of 2.1 Ga ophiolitic mélange and arc‐related rocks in the northern Yangtze Block (Han et al, 2017; Wu et al, 2012), 2.1–1.85 Ga upper amphibolite to granulite facies metamorphism (with a clockwise P ‐ T path) both in northern and southwestern Yangtze Block (Nam et al, 2003; Sun et al, 2008; Yin et al, 2013), and 1.75–1.5 Ga intracratonic basin sedimentation with associated mafic intrusive rocks in the southwestern Yangtze Block (e.g., Chen et al, 2013; Lu et al, 2019; Wang et al, 2014; Zhao, Zhou, & Zheng, 2010; Zhao, Zhou, Li, et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The ~1.75 Ga Timpton LIP in southern Siberia was interpreted as the product of a mantle plume beneath Siberia (Ernst, Hamilton, et al, 2016; Gladkochub et al, 2010). The Yangtze Block is similarly characterized by synchronous mafic magmatism, including the ~1.87 Ga Kongling dykes in the northern Yangtze Block (Qiu et al, 2020) and the ~1.75 Ga Wuding bimodal igneous event, the 1.70 Ga Tongan gabbro event, the 1.64 Ga Dahongshan intrusions (Lu et al, 2019), and the ~1.5 Ga Zhuqing intrusions and Dongchuan dykes in the southwestern Yangtze Block (Fan et al, 2013) (Figure 14). In addition, synthesis of available geochemical data of mafic rocks from the southwestern Yangtze Block, Siberia, and northern Laurentia indicates similar major element contents (such as low to high TiO 2 content) and interelemental ratios (such as Nb/Y and (La/Yb) N ) (Figure S2).…”

Section: Discussionmentioning

confidence: 99%

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Late Paleoproterozoic to Early Mesoproterozoic Mafic Magmatism in the SW Yangtze Block: Mantle Plumes Associated With Nuna Breakup?

Wang

Cawood

et al. 2020

JGR Solid Earth

Self Cite

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Numerous late Paleoproterozoic to early Mesoproterozoic mafic magmatic rocks are exposed in the southwestern Yangtze Block, corresponding to early breakup of the Nuna supercontinent. Geochronological data reveal three episodes of mafic magmatism at ~1,740, 1,700, and 1,500 Ma. The two older generations have MORB‐like Nb/Ta ratios and superchondritic Nd‐Hf isotopes, indicating that they were likely derived from partial melting of asthenospheric mantle. In contrast, the ~1,500 Ma mafic rocks possess OIB‐like Nb/Ta (16.7–19.1) and Zr/Hf (41.0–45.1) ratios, εNd (t) values (−0.8 to +0.1), and εHf (t) values (−3.3 to +8.4), suggesting that they originated from a mantle plume. These three pulses of mafic magmatic activity in the Yangtze Block have geochemical features (such as TiO2 contents, Nb/Y, and La/Yb values), similar to coeval mafic rocks in Siberia and Laurentia, consistent with detrital zircon provenance studies, which show a spatial linkage of the Yangtze Block with northern Laurentia in the Nuna configuration. Taking all synchronous mafic magmatism into account, a mantle plume beneath southern Siberia was considered to be initiated at ~1,750 Ma forming a broad region of mafic magmatism that extended into the Yangtze Block as well as beneath northern Laurentia and resulted in lithospheric extension. The Yangtze Block was possibly the nearest neighbor to northwestern Siberia at ~1,500 Ma and subsequently drifted from the Nuna supercontinent induced by the ~1,500 Ma Kuonamka mantle plume, heralding a period of limited magmatic activity and tectonic quiescence in the Yangtze Block that extended throughout the remainder of the Mesoproterozoic.

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Petrogenesis of Paleo-Mesoproterozoic mafic rocks in the southwestern Yangtze Block of South China: Implications for tectonic evolution and paleogeographic reconstruction

Cited by 62 publications

References 109 publications

Nature and Evolution of Pre‐Neoproterozoic Continental Crust in South China: A Review and Tectonic Implications

Nature and Evolution of Pre‐Neoproterozoic Continental Crust in South China: A Review and Tectonic Implications

Neoarchean and Paleoproterozoic K-rich granites in the Phan Si Pan Complex, north Vietnam: Constraints on the early crustal evolution of the Yangtze Block

Late Paleoproterozoic to Early Mesoproterozoic Mafic Magmatism in the SW Yangtze Block: Mantle Plumes Associated With Nuna Breakup?

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