Constraining timing and tectonic implications of Neoproterozoic metamorphic event in the Cathaysia Block, South China

Yao, Jinlong; Cawood, Peter A.; Li, Jinyi

doi:10.1016/j.precamres.2017.01.032

Cited by 32 publications

(13 citation statements)

References 28 publications

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“…However, the protolith age of gabbro collected from the same exposure was dated at 879 ± 10 Ma, while the white-colored metamorphic rims of zircons from this gabbro yielded a U-Pb mean age of 438 Ma. This evidence is an example of "the Neoproterozoic protolith (arc-type gabbro) which is metamorphosed into amphibolite in the Silurian" (Yao et al, 2017), the same as the garnet amphibolite in the neighboring Longyou area. It is unusual that Lin et al didn't take into account these important results in their model.…”

Section: Evidence From Magmatic Rocksmentioning

confidence: 85%

“…Lin et al cited the MT-HP-type disthene-bearing schist, with a depth of >35 km, in the northern Wuyi terrane as evidence of plate subduction in the early Paleozoic, but this schist in the Neoproterozoic Mayuan assemblage (Zhao and Cawood, 1999) has been recently dated with a metamorphic age of 860 Ma (Yao et al, 2017). Lin et al also presented the gabbro remnants within the Chencai complex as evidence of plate accretion.…”

Section: Evidence From Magmatic Rocksmentioning

confidence: 99%

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Appalachian-style multi-terrane Wilson cycle model for the assembly of South China: COMMENT

Shu

Meijia

2018

Geology

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Section: Evidence From Magmatic Rocksmentioning

confidence: 85%

Section: Evidence From Magmatic Rocksmentioning

confidence: 99%

Appalachian-style multi-terrane Wilson cycle model for the assembly of South China: COMMENT

Shu

Meijia

2018

Geology

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“…Comparisons of late Mesoproterozoic to early Neoproterozoic sequences in west Hainan, Cathaysia, and Southwest Yangtze. Data for the Shilu Group (d, f) and Shihuiding Formation (b) are from Li et al (2008), Wang et al (2015), Yao, Li, et al (2017), and this study, Wanquan Group (a) are from Yao, Shu, et al (2017) and Kunyang Group (c, e) are from Sun et al (2009) and Li et al (2013b). …”

Section: Discussionmentioning

confidence: 72%

Provenance Record of Late Mesoproterozoic to Early Neoproterozoic Units, West Hainan, South China, and Implications for Rodinia Reconstruction

et al. 2020

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Unraveling the character and source of late Mesoproterozoic‐early Neoproterozoic sedimentary sequences is crucial in constraining Rodinia reconstructions. We carried out an integrated geochemical, zircon U‐Pb geochronological and Lu‐Hf isotopic study of the Shilu Group and the overlying Shihuiding Formation in Hainan, South China. These two successions are chemically mature and dominated by siliceous components. The Shilu Group was mainly derived from felsic arc lithologies whereas the Shihuiding Formation was from recycled sedimentary materials and records a transition from convergent to passive margin settings during the late Mesoproterozoic‐early Neoproterozoic in Hainan. Detrital zircons from the Shilu Group and Shihuiding Formation yield similar age populations, with maximum depositional ages of ~1,100–1,000 Ma and ~900 Ma, respectively. The Shilu Group matches well with the Kunyang Group outcropped in the Yangtze Block in depositional age, detrital zircon age populations and Lu‐Hf isotopic compositions, and geochemical characteristics, whereas the Shihuiding Formation exhibits significantly different detrital age populations from the Wanquan Group in the Cathaysia Block. This indicates that Hainan was linked to the Yangtze Block rather than the Cathaysia Block in the late Mesoproterozoic‐early Neoproterozoic. The Shilu and Kunyang groups have similar detrital age patterns to the late Mesoproterozoic to early Neoproterozoic strata in northwest India and are distinct from their equivalents in west Laurentia, suggesting an external location of Hainan‐Yangtze in Rodinia.

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“…(a) Geological map of China (modified after [46]). (b) Simplified regional map with highlighted regions showing the Early Paleozoic Wuyi-Yunkai orogen; JSF = Jiangshan-Shaoxing fault; HGF = Heyuan-Guangfeng fault; ZDF = Zhenghe-Dapu fault; CNF = Changle-Nanao fault (modified after [30,31,41,47]).…”

Section: Regional Geologymentioning

confidence: 99%

Partial Melting and Crustal Deformation during the Early Paleozoic Wuyi–Yunkai Orogeny: Insights from Zircon U-Pb Geochronology and Structural Analysis of the Fuhuling Migmatites in the Yunkai Region, South China

et al. 2019

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：Migmatites record crucial information about the rheology and tectonothermal evolutionof the deep crust during orogenesis. In the Wuyi–Yunkai orogen in South China, migmatites at Fuhuling record Early Paleozoic high temperatures and associated partial melting. However, the absolute timing and implications for the rheology of the deep crust during orogenesis are poorly constrained. In this contribution, we used spatial analysis of migmatitic leucosomes, structural analysis, and U-Pb geochronology of zircon to elucidate the absolute timing of crustal partial melting, the degree of partial melting, and the role of partial melting on the rheology of the crust during the Wuyi–Yunkai orogeny. Partial melting of the Fuhuling migmatites occurred at c. 440 Ma during Early Paleozoic Wuyi–Yunkai orogenesis. Subsequent lower temperature metamorphism associated with Indosinian movement that caused minor zircon recrystallization was temporally associated with the crystallization of nearby biotite monzogranites, but it did not influence the morphology of the Fuhuling migmatites. The migmatites preserve a morphological transition from metatexite to diatexite with an increasing proportion of leucosome. This transition preserves different structural characteristics that represent the response of the solid framework and melt network to variable melt fractions during partial melting. The large proportion of in situ or in source leucosome in the Fuhuling migmatites suggests that it was a melt-rich crustal horizon during orogenesis, and that a substantial proportion of anatectic melt was retained in the deep crust. The rheological transition documented in the Fuhuling migmatites was caused by changes in the melt fraction, and it is an analogue for the rheological transition characteristics of melt-rich crustal horizons in the Yunkai region during Early Paleozoic Wuyi–Yunkai orogenesis and subsequent orogenic collapse.

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Constraining timing and tectonic implications of Neoproterozoic metamorphic event in the Cathaysia Block, South China

Abstract: The Cathaysia Block of the South China Craton includes a Proterozoic basement that experienced a prolonged Precambrian crustal evolution but to date lacks evidence of

Cited by 32 publications

References 28 publications

Appalachian-style multi-terrane Wilson cycle model for the assembly of South China: COMMENT

Appalachian-style multi-terrane Wilson cycle model for the assembly of South China: COMMENT

Provenance Record of Late Mesoproterozoic to Early Neoproterozoic Units, West Hainan, South China, and Implications for Rodinia Reconstruction

Partial Melting and Crustal Deformation during the Early Paleozoic Wuyi–Yunkai Orogeny: Insights from Zircon U-Pb Geochronology and Structural Analysis of the Fuhuling Migmatites in the Yunkai Region, South China

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