Petrogenesis of the early Paleozoic strongly peraluminous granites in the Western South China Block and its tectonic implications

Peng, Touping; Wu, Fan; Zhao, Guochun; Peng, Bingxia; Xia, Xiaoping; Mao, Yongsheng

doi:10.1016/j.jseaes.2014.11.022

Cited by 30 publications

(16 citation statements)

References 135 publications

(282 reference statements)

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“…7a, the obvious negative correlation of Sr and Ba contents (omitted) vs. SiO contents, then the strongly depleted Eu (Fig. 5a), indicated the significant fractionation of the plagioclase and K-feldspar during magma evolution (Rollinson 1993;Peng et al 2015). Furthermore, SiO 2 contents have a positive correlation with Y concentrations in some typical arc lavas (Rohrlach and Loucks 2005).…”

Section: Petrogenesis Of the Granitesmentioning

confidence: 97%

U-Pb zircon geochronology, geochemistry, and Sr-Nd-Pb-Hf isotopic composition of the Late Cretaceous monzogranite from the north of the Yidun Arc, Tibetan Plateau Eastern, SW China: petrogenesis and tectonic implication

et al. 2018

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The Yidun Arc belt, a Triassic volcanic arc, was the result of Late Triassic large-scale subduction orogenic process of Paleo-Tethys and exposed the voluminous intermediate-acid intrusions during Mesozoic. In this paper, we mainly present petrography and petrology, major and trace element, Sr-Nd-Pb-Hf isotopic compositions, and zircon U-Pb ages for the monzogranites from the Queer Mountains area at the northern of Yidun Arc. The Queer Mountains monzogranites were emplaced at 93.6 ± 0.9 Ma (MSWD = 6.8, n = 34, 2σ), revealing that the monzogranites are the products of magmatism during the period of Late Cretaceous (BYanshanian^). The monzogranites have high SiO 2 , Al 2 O 3 , and K 2 O contents and enrichment in light rare earth elements (LREEs) and large-ion lithophile elements (LILEs) but depleted in high field strength elements contents (HFSEs), with relatively high variable (La/Yb) N values (1.38-11.79) and evidently negative Eu anomalies (Eu/Eu* = 0.07-0.35). The samples have high initial 87 Sr/ 86 Sr (0.708421-0.715698), with negative ε Nd (t) (− 0.53 to − 3.57) and ε Hf (t) (− 0.4 to − 3.2) values, and the Nd and Hf of two-stage model ages are 1.

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Section: Petrogenesis Of the Granitesmentioning

confidence: 97%

U-Pb zircon geochronology, geochemistry, and Sr-Nd-Pb-Hf isotopic composition of the Late Cretaceous monzogranite from the north of the Yidun Arc, Tibetan Plateau Eastern, SW China: petrogenesis and tectonic implication

et al. 2018

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“…According to previous studies, granites and granitic gneisses dated from the Late Ordovician to the Early Devonian are considered the significant products of early Paleozoic magmatism in the SCB [37][38][39]44,[100][101][102]. The early Paleozoic Wuyi-Yunkai orogeny in the SCB was the first extensive tectonothermal event since the Neoproterozoic break-up of the Rodinia supercontinent, roughly synchronized with the Caledonian orogeny in Europe [1,103,104].…”

Section: Tectonic Implicationsmentioning

confidence: 99%

“…Therefore, it should have been generated in the same tectonic setting. However, it is controversial whether the tectonic setting of the early Paleozoic magmatic rocks (especially 460-400 Ma) in the South China Plate was syn-collisional [43,113] or post-collisional [26,27,37,39,44,100,101]. As shown in Figure 9, Jilongjie granites plot in the field of syn-collisional to post-collisional granites.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

Geochronology and Petrogenesis of the Early Paleozoic Jilongjie Granites in the Central South China Block: Implication for Post-Kinematic Lithospheric Delamination

He,

Wang,

Sui

et al. 2023

Minerals

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Controversy over the geodynamic interpretation of the early Paleozoic granites in the South China Block constrains understanding of tectonic–magmatic evolution. In this paper, we present zircon U-Pb age, Hf isotope, and major and trace element data of the early Paleozoic granites in the Jilongjie region, south-central Hunan Province. A sample that yielded a weighted average 206Pb/238U age of 425 ± 3 Ma falls into the post-collisional granite field in the classification discriminant of magmatic rocks. Geochemical features indicate that the Jilongjie pluton is a shoshonitic metaluminous rock. The Jilongjie pluton’s chondrite-normalized rare earth element patterns exhibit a slight enrichment of light rare earth elements (LREEs) relative to heavy rare earth elements (HREEs) with (La/Yb)N ratios of 15.1–23.7 and weak Eu anomalies (Eu/Eu* = 0.68–0.78). Zircon Hf isotope results show εHf(t) ranging from −9.94 to −0.69. Jilongjie granite’s parent magma originated from a mixing of crust-derived felsic and mantle-derived mafic magmas, which then underwent fractional crystallization during its ascent. Jilongjie granite was generated through a post-collisional extensional setting associated with delamination of the thickened lithosphere.

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“…4c, d). The peraluminous characteristics of granitic rocks are generally related to the involvement of crustal contamination or the participation of sedimentary materials in the source area (Peng et al, 2015;Bucholz and Spencer, 2019). We preclude the influence of crustal contamination, because there is no apparent linear relationship between the ε Nd (t) and whole-rock SiO 2 values (Fig.…”

Section: Porphyritic Monzogranitesmentioning

confidence: 99%

Petrogenesis and Geodynamic Implications of Early Cretaceous (∼130 Ma) Magmatism in the Baingoin Batholith, Central Tibet: Products of Subducting Slab Rollback

Tang

Wang

et al. 2022

Acta Geologica Sinica (Eng)

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The Baingoin batholith is one of the largest granitic plutons in the North Lhasa terrane. Its petrogenesis and tectonic setting have been studied for decades, but remain controversial. Here we report data on geochronology, geochemistry and isotopes of Early Cretaceous granitoids within the Baingoin batholith, which provide more evidence to uncover its petrogenesis and regional geodynamic processes. The Early Cretaceous magmatism yields ages of 134.4–132.0 Ma and can be divided into I‐type, S‐type and highly fractionated granites. The I‐ and S‐type granites exhibit medium SiO2, high K2O/Na2O with negative εNd(t) and εHf(t) values, whereas, the albite granites have very high SiO2 (79.04%–80.40%), very low K2O/N2O, negative εNd(t) and a large variation in εHf(t). Our new data indicate that these granitoids are derived from unbalanced melting in a heterogeneous source area. The granodiorites involved had a hybrid origin from partial melting of basalt‐derived and Al‐rich rocks in the crust, the porphyritic monzogranites being derived from partial melting of pelitic rocks. The albite granites crystallized from residual melt separated from K‐rich magma within the ‘mush’ process and underwent fractionation of K‐feldspar. We believe that the Early Cretaceous magmatism formed in an extensional setting produced by the initial and continuous rollback of a northward‐subducting slab of the NTO.

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Petrogenesis of the early Paleozoic strongly peraluminous granites in the Western South China Block and its tectonic implications

Cited by 30 publications

References 135 publications

U-Pb zircon geochronology, geochemistry, and Sr-Nd-Pb-Hf isotopic composition of the Late Cretaceous monzogranite from the north of the Yidun Arc, Tibetan Plateau Eastern, SW China: petrogenesis and tectonic implication

U-Pb zircon geochronology, geochemistry, and Sr-Nd-Pb-Hf isotopic composition of the Late Cretaceous monzogranite from the north of the Yidun Arc, Tibetan Plateau Eastern, SW China: petrogenesis and tectonic implication

Geochronology and Petrogenesis of the Early Paleozoic Jilongjie Granites in the Central South China Block: Implication for Post-Kinematic Lithospheric Delamination

Petrogenesis and Geodynamic Implications of Early Cretaceous (∼130 Ma) Magmatism in the Baingoin Batholith, Central Tibet: Products of Subducting Slab Rollback

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