A possible transition from island arc to continental arc magmatism in the eastern Jiangnan Orogen, South China: Insights from a Neoproterozoic (870–860 Ma) gabbroic–dioritic complex near the Fuchuan ophiolite

Cui, Xiang; Zhu, Wenbin; Fitzsimons, I. C. W.; Wang, Xi; Lu, Yingcheng; Wu, Xinhui

doi:10.1016/j.gr.2017.02.012

Cited by 52 publications

(16 citation statements)

References 92 publications

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“…Complex /E.Ghats (Halpin et al, 2005;Saeed, 2009, 2011), and Jiangnan orogen (Cui et al, 2017;Li et al, 2018;Wang et al, 2008c;Yao et al, 2013;Yin et al, 2013). (Gehrels et al, 2006;McQuarrie et al, 2008), (d) Neoproterozoic samples in India (Chattopadhyay et al, 2015;Dharma Rao et al, 2013), (e) Neoproterozoic samples in East Antarctica (Boger et al, 2000;Jacobs et al, 2003;Tsunogae et al, 2015), and (f) Neoproterozoic samples in Western Australia (Ksienzyk et al, 2012).…”

Section: Position Of South China In Rodinia and Gondwanamentioning

confidence: 99%

Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block

Cawood

et al. 2018

Precambrian Research

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Neoproterozoic paleogeography of the South China is dominated by the formation of Rodinia, its break-up, and the subsequent amalgamation of Gondwana. Two negative excursions of the chemical index of alteration (CIA) and the chemical index of weathering (CIW) recorded in the Cryogenian to Ediacaran sedimentary rocks of the Cathaysia Block, South China, indicate two cooling events. In combination with available age constraints, this data suggests correlation with the global Marinoan (ca. 650-635 Ma) and Gaskiers (ca. 579 Ma) glaciations. U-Pb ages of detrital zircons from the Cryogenian to lower Ediacaran strata define two distinctive age peaks at 1056 Ma and 998 Ma, whereas the upper Ediacaran strata show only one age peak at 957 Ma. These data demonstrate Neoproterozoic sedimentary rocks in the Cathaysia Block were derived from a source external to the craton. The predominant late Mesoproterozoic to early Neoproterozoic (1140-870 Ma) detrital zircons were most likely derived from a source dominated by North India and East Antarctica with limited input from Western Australia. Furthermore, ε Hf (t) values of detrital zircons are similar to the coeval detrital zircons from Rayner-Eastern Ghats. The detrital record of the late Cryogenian and Ediacaran strata in the Cathaysia Block suggests that the South China Block was connected to the northern margin of India during the dispersal of Rodinia and the assembly of East Gondwana. Detrital zircons from Cryogenian strata overlying the Jiangnan Orogen are largely in the range 900-700 Ma with scattered Archean and Paleoproterozoic grains. These ages are consistent with derivation from local sources within South China. The timing of accumulation of these units, after collisional assembly of South China, likely accounts for their more restricted provenance with collision generated relief providing both a local source and restricting input from further south within India and/or the rest of Gondwana.

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Section: Position Of South China In Rodinia and Gondwanamentioning

confidence: 99%

Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block

Cawood

et al. 2018

Precambrian Research

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“…Ding et al (2008) obtained a zircon SHRIMP U-Pb date of 848 ± 12 Ma (n = 7, MSWD = 1.9) for a gabbro dike that intruded into the harzburgite of the mélange. Other zircon U-Pb dates of 824 ± 3 Ma (Zhang S B et al, 2012), 840-820 Ma (Zhang C L et al, 2013), 870-830 Ma (Cui et al, 2017), and 831 ± 5 Ma (Sun et al, 2017) were obtained from Fuchuan, Shexian County. All these dates are younger than those from the northeastern Jiangxi ophiolite belt, which is from Xiwan, Dexing City (995 ± 22 Ma and 993 ± 12 Ma, SIMS zircon U-Pb dating on gabbros, Wang X S et al, 2015; 992 ± 25 Ma, LA-ICPMS zircon U-Pb dating for another gabbro sample, Jiang et al, 2017;~1000 Ma, Sun et al, 20171020Ma, Zhang C L et al, 2015and1009 ± 5 Ma, Li Y et al, 2017).…”

Section: Xikou Group and Volcanic Rocks Of The Jingtan Fm On The Soumentioning

confidence: 99%

“…The first phase of rifting might have occurred in the local extensional tectonic background within a wider compressional one; it did not pervasively influence the whole of South China. A plate-rift back-arc basin during 850 Ma to 820 Ma in the north of the Shuangxiwu arc in the eastern Jiangnan Orogen has been identified (Li Z X et al, 2007;Li X H et al, 2008Li X H et al, , 2009Li X H et al, , 2010Zhang Y Z et al, 2013;Cui et al, 2017). When continental collision occurred at 860-820 Ma (Zhou et al, 2002(Zhou et al, , 2006Wang X L et al, 2006Wang X L et al, , 2007Wang X L et al, , 2008Zhao and Cawood, 2012;Cawood et al, 2013;Yin et al, 2013;Zhang Y Z et al, 2013;Yao et al, 2014Yao et al, , 2016Zhao, 2015), multiple-arc-back-arc systems were developed during the assembly of the South China Craton (Li X H et al, 2008;Lyu et al, 2017;Shu et al, 2011Shu et al, , 2019.…”

Section: Strata-tectonic-magmatism Events In the Eastern Jiangnan Orogenmentioning

confidence: 99%

“…Northward subduction, and poly-island arc assemblage ( Fig. 16a; Li Z X et al, 2007;Li X H et al, 2008;Cui et al, 2017) caused the formation of the Jiangnan Orogen during 970-830 Ma (Xue et al, 2010;Wang X S et al, 2015;Zhao, 2015). The earliest closure might have occurred in the northeastern Jiangxi area (ophiolite mélange), followed by the Jiangshang-Shaoxing area and southern Anhui area (Shexian ophiolite mélange) (Li X H et al, 1997;Zhang C L et al, 2015;Guo et al, 2017;Li Y et al, 2017).…”

Section: Strata-tectonic-magmatism Events In the Eastern Jiangnan Orogenmentioning

confidence: 99%

“…The earliest closure might have occurred in the northeastern Jiangxi area (ophiolite mélange), followed by the Jiangshang-Shaoxing area and southern Anhui area (Shexian ophiolite mélange) (Li X H et al, 1997;Zhang C L et al, 2015;Guo et al, 2017;Li Y et al, 2017). At the near end of the formation process of the orogen, the first phase of rifting in the local extensional tectonic background within a whole compressional one began (Li Z X et al, 2007;Li X H et al, 2010;Zhang Y Z et al, 2013;Cui et al, 2017). The approximately 830 Ma cordierite-bearing Jiuling, Xiuning, Xucun, and Shexian intrusive bodies in northern Jiangxi and southern Anhui represent the magmatism of the collision process ( Fig.…”

Section: Strata-tectonic-magmatism Events In the Eastern Jiangnan Orogenmentioning

confidence: 99%

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Rectifying the Neoproterozoic Stratigraphic Framework of Eastern Jiangnan Orogen, Southeast China

Liu

Chen

et al. 2020

Acta Geologica Sinica (Eng)

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Studies on the metamorphic and related magmatic rocks within the Jiangnan Orogen, southern China, are important to understand the formation and evolution of this Neoproterozoic orogen because they can provide evidence for revealing the tectonic evolution of the South China Block. Following on from earlier attempts at stratigraphic correlation and creating a framework for the low‐grade metamorphosed basement, new first‐hand information on the composition and deformation of the East Jiangnan Orogen basement indicates that the sedimentary rocks in the north are composed of the sequential Shangxi Group (Gp) and the overlying Likou Gp, with a clear regional unconformity in between. The Likou Gp includes the Zhentou Formation (Fm.) and the Dengjia Fm., with the previously named Puling Fm. only basalt interbeds within the Dengjia Fm. The Xucun granodiorite pluton of ∼830 Ma intrudes the Shangxi Gp, thereby resulting in a 100 m‐wide hornfels zone within the wall rocks, indicating that the formation of the group occurred earlier than that of the pluton. By contrast, the southern metamorphic rocks of the Xikou Gp and the overlying Jingtan Fm. are flaky, disordered, and strongly deformed. The Jingtan Fm. is roughly equivalent to the Heshangzhen Gp and includes the Zhoujiacun conglomerates in the lower part and a rhyolite in the upper part with interbedded basalt. This assessment of Neoproterozoic stratigraphic sequences and magmatic rocks in the east of the Jiangnan Orogen differs from and rectifies previous studies, emphasizing that explanation of analytical results, particularly geochronology, should be consistent with facts gathered in the field.

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Tectonic Settings of Potassic Igneous Rocks

Müller¹,

Groves²

2018

Potassic Igneous Rocks and Associated Gold-Copper Mineralization

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A possible transition from island arc to continental arc magmatism in the eastern Jiangnan Orogen, South China: Insights from a Neoproterozoic (870–860 Ma) gabbroic–dioritic complex near the Fuchuan ophiolite

Cited by 52 publications

References 92 publications

Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block

Reconstructing Cryogenian to Ediacaran successions and paleogeography of the South China Block

Rectifying the Neoproterozoic Stratigraphic Framework of Eastern Jiangnan Orogen, Southeast China

Tectonic Settings of Potassic Igneous Rocks

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