Middle Neoproterozoic (∼845Ma) continental arc magmatism along the northwest side of the Jiangshan–Shaoxing suture, South China: Geochronology, geochemistry, petrogenesis and tectonic implications

Liu, Zheng; Jiang, Yao-Hui; Wang, Guochang; Ni, Chun-Yu; Qing, Long; Qiao, Zhanfeng

doi:10.1016/j.precamres.2015.07.013

Cited by 28 publications

(7 citation statements)

References 74 publications

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“…The zircons collected from the Shanhou and Jiangshan plutons in Zhejiang Province were dated at ca. 847-842 Ma (Liu et al, 2015), with the Huangshan and Meiling bimodal volcanic rocks in Zhejiang Province forming at 860 ± 9 Ma and 840 ± 5 Ma, respectively (Lyu et al, 2017). New dating results show that the basaltic volcanic suite of the Qingdingshan basicultrabasic rocks formed at ca.…”

Section: Tectonic Implicationsmentioning

confidence: 96%

“…Diagram showing the relationship between the major elements and SiO 2 content for the Jiangshan volcanic rocks. The Jiangshan dioritic rocks (Liu et al, 2015) are also plotted, for comparison. positive calculated ε Nd (t) of 2.85-4.74 (Table 3).…”

Section: Whole-rock Sr-nd Isotopesmentioning

confidence: 99%

“…846 Ma Shanhou pluton, ca. 842 Ma Jiangshan pluton (Liu et al, 2015), ca. 860 Ma Huangshan volcanic rocks, ca.…”

Section: The Ages Of the Ignimbrite Rocksmentioning

confidence: 99%

“…Whole-rock ε Nd (t) vs. zircon ε Hf (t) for the Jiangshan volcanic rocks (after Vervoort et al, 1999). The field of the Shuangxiwu volcanic rocks are after Liu et al (2015), and references therein.…”

Section: Genetic Type Of the Volcanic Rocksmentioning

confidence: 99%

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Geochronology, Geochemistry, Whole Rock Sr‐Nd and Zircon Hf‐O Isotopes of the Early Neoproterozoic Volcanic Rocks in Jiangshan, Eastern Part of the Jiangnan Orogen: Constraints on Petrogenesis and Tectonic Implications

Zhang

Liu

Ding

et al. 2020

Acta Geologica Sinica (Eng)

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This paper presents the results of combined studies of geochronology, geochemistry, whole rock Sr‐Nd and zircon Hf‐O isotopes carried out upon the rhyodacite and ignimbrite of Shangshu village, Shangyu town and Shanghupeng village of Jiangshan City in Zhejiang Province, along the northwestern side of the Jiangshan–Shaoxing suture. SHRIMP zircon U‐Pb dating of samples in the three areas yielded weighted mean 206Pb/238U ages of 842.8 ± 6.9 Ma and 850.0 ± 7.3 Ma, 839 ± 9 Ma and 832.2 ± 8.1 Ma, 828.3 ± 8.5 Ma and 836.9 ± 9.9 Ma, respectively. These ages are older than the volcanic rocks of the Shangshu Formation dated at around 780 Ma distributed in Fuyang City, Hangzhou City, Kaihua County, etc. The volcanic rocks generally have high SiO2 (54.08–76.80 wt%) and Al2O3 (12.40–21.31 wt%), low Fe2O3 (0.68–8.92 wt%), MgO (0.29–2.49 wt%), CaO (0.12–2.86 wt%), TiO2 (0.10–1.59 wt%) and P2O5 (0.01–0.39 wt%), with variable total alkalis (K2O + Na2O =5.42–8.29 wt%). There exists a clear negative correlation between SiO2 and P2O5. The volcanic rocks have A/CNK ratios of 1.03–2.77 and thus are peraluminous. They are characterized by enrichment in LREE, Rb, Ba, Zr, Hf, K, Th, La, U and depletion in Nb, Sr, P, Ti, with distinct LREE and HREE fractionation of (La/Yb)N values of 5.68–11.67, and with a moderate negative Eu anomaly (&Eu=0.58–0.89). Whole‐rock geochemical data shows that the Jiangshan volcanic rocks are possibly I‐type granitic rocks, even though they have some characteristics of A&S‐type granites due to the magma fractional crystallization and water‐rock interaction. Zircon δ18O values are 3.97‰–5.49‰ (average 4.50‰), 2.90‰–5.21‰ (average 4.32‰) for ignimbrite from Shangshu village section, and Shanghupeng village section, respectively. They are slightly lower than the average δ18O values of igneous zircons in equilibrium with mantle magmas (5.3 ± 0.6‰ (2σ)), the lower δ18O value also demonstrating the presence of high temperature water‐rock interactions. The ignimbrite rocks have positive ∊Nd(t) (4.02, 3.37, 3.91, 4.74, 2.85, 4.39, totals from the three areas) and ∊Nd(t) (in‐situ zircon) (4.3–14.6, a weighted mean of 8.4; 6.6–12.7, a weighted mean of 9.0; 8.1–12.0, a weighted mean of 9.5, respectively, from the three areas). In conjunction with the trace element studies, they indicate that the source region of the Jiangshan volcanic rocks was mainly composed of juvenile lower crustal material, mixed with some mantle‐sourced magma. Detailed elemental and isotopic data suggest that the Jiangshan volcanic rocks were formed in a continental arc setting. There is a series of ca. 860–830 Ma volcanic rocks formed in a back‐arc extensional setting in the southern margin of the eastern Jiangnan Orogen, along the northwest side of the Jiangshan–Shaoxing suture. The first stage rift‐related anorogenic magmatism may have occurred as early as ca. 860 Ma in the eastern Jiangnan Orogen.

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Section: Tectonic Implicationsmentioning

confidence: 96%

Section: Whole-rock Sr-nd Isotopesmentioning

confidence: 99%

“…846 Ma Shanhou pluton, ca. 842 Ma Jiangshan pluton (Liu et al, 2015), ca. 860 Ma Huangshan volcanic rocks, ca.…”

Section: The Ages Of the Ignimbrite Rocksmentioning

confidence: 99%

Section: Genetic Type Of the Volcanic Rocksmentioning

confidence: 99%

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Geochronology, Geochemistry, Whole Rock Sr‐Nd and Zircon Hf‐O Isotopes of the Early Neoproterozoic Volcanic Rocks in Jiangshan, Eastern Part of the Jiangnan Orogen: Constraints on Petrogenesis and Tectonic Implications

Zhang

Liu

Ding

et al. 2020

Acta Geologica Sinica (Eng)

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“…16. Cartoons showing the tectonic evolution of the eastern Jiangnan Orogen (synthesized after Liu et al, 2015;Zhao, 2015;Wang X L et al, 2017;Wang G G et al, 2017). Ma, according to the contact relationship with the ~830 Ma Xucun granodiorite.…”

Section: Discussionmentioning

confidence: 99%

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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Petrogenesis of the Late Jurassic peraluminous biotite granites and muscovite-bearing granites in SE China: geochronological, elemental and Sr–Nd–O–Hf isotopic constraints

Jiang

Zhu

2017

Contrib Mineral Petrol

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Middle Neoproterozoic (∼845Ma) continental arc magmatism along the northwest side of the Jiangshan–Shaoxing suture, South China: Geochronology, geochemistry, petrogenesis and tectonic implications

Cited by 28 publications

References 74 publications

Geochronology, Geochemistry, Whole Rock Sr‐Nd and Zircon Hf‐O Isotopes of the Early Neoproterozoic Volcanic Rocks in Jiangshan, Eastern Part of the Jiangnan Orogen: Constraints on Petrogenesis and Tectonic Implications

Geochronology, Geochemistry, Whole Rock Sr‐Nd and Zircon Hf‐O Isotopes of the Early Neoproterozoic Volcanic Rocks in Jiangshan, Eastern Part of the Jiangnan Orogen: Constraints on Petrogenesis and Tectonic Implications

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

Petrogenesis of the Late Jurassic peraluminous biotite granites and muscovite-bearing granites in SE China: geochronological, elemental and Sr–Nd–O–Hf isotopic constraints

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