Petrogenesis of Early Cretaceous adakitic granodiorite: Implication for a crust thickening event within the Cathaysia Block, South China

Sun, Liguang; Zhao, Kui-Dong; Chen, Peirong; Chen, Weifeng; Sun, Tao; Shen, Wangqiang; Guo-long, Huang

doi:10.1007/s11430-016-5200-y

Cited by 8 publications

(2 citation statements)

References 84 publications

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“…(a) diagram Sr/Y versus Y for discriminating high and normal Sr/Y rocks (after Castillo, 2006), (b) diagrams MgO versus SiO 2 , (c) Cr versus SiO 2 and (d) Ni versus SiO 2 for discriminating different petrogenesis of high Sr/Y rocks. Fields of subducted slab, delaminated lower crust and thick lower crust are after Sun et al (2017), Wang et al (2006), and references therein. Data for orogenic thickened lower crust‐derived high Sr/Y magmatic rocks are after Chung et al (2003), Hou et al (2004), and Wang et al (2005); Data for intraplate lower crust‐derived high Sr/Y magmatic rocks are after Ma et al (2015) and references therein; Data for the Triassic felsic rocks in the NNCC are after Han et al (2004), Jiang et al (2007), S. H. Zhang, Zhao, Song, et al (2009), X. H. Zhang, Zhang, Wilde, Yang, and Chen (2010), Zhang et al (2011), Liu et al (2011), X. H. Zhang, Yuan, et al (2012), Z. Zhang, Zhang, et al (2012), Cao et al (2013), Ye et al (2014), S. H. Zhang, Zhao, Davis, et al (2014), Z. Zhang, Zhang, Shao, et al (2014), Wang et al (2015), S. H. Zhang, Zhao, et al (2016), Qiao et al (2017), Wang et al (2017), Ji, Zhang, Han, Yu, and Chen (2017), and references therein…”

Section: Discussionmentioning

confidence: 99%

Early‐Middle Triassic high Sr/Y granites in the northern margin of the North China Craton: Petrogenesis and tectonic implications

2022

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Handling Editor: E. Bozkurt Radiometric dating results and geochemical and isotopic data obtained in this study for two granitic plutons in the northern margin of the North China Craton (NNCC) provide important information on the tectonic environment of the North China Craton (NCC) in the Early to Middle Triassic. The two plutons, Wanlongchang and Baiyanaobao, were dated being formed at 247 Ma (our previous study) and 237 Ma (this study), respectively. These two granites are characterized by low initial 87 Sr/ 86 Sr ratios (0.7055-0.7073), ε Nd (t) values (À9.9 to À15.0), and zircon ε Hf (t) values (À8.7 to À27.0), suggesting their magmas originated from ancient lower crust. Both granites display high Sr/Y ratios (most >30) and (La/Yb) N (most >30), but low Cr (8.31-40.9 ppm), Ni (3.59-13.8 ppm), MgO (0.12-1.17%) contents, and low Mg # values (26-39), which suggests that the melts that formed the two granites were derived from thickened lower crust. When elemental concentration data and compiled Sr/Y ratios in the previous works are evaluated, it is revealed that many Early-Middle Triassic felsic rocks in this region have high Sr/Y ratios characters. Combining tectonomagmatic investigations, we further proposed that the Early-Middle Triassic crustal thickening may have resulted from the collision between the NCC and the South Mongolia Terranes after the final closure of the Palaeo-Asian Ocean.

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Section: Discussionmentioning

confidence: 99%

Early‐Middle Triassic high Sr/Y granites in the northern margin of the North China Craton: Petrogenesis and tectonic implications

2022

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“…At approximately 100 Ma, the global plate underwent an important reorganization event, the paleo‐Pacific plate was also affected, and the direction of subduction to the Eurasian plate suddenly changed from NW to NNW (e.g. Sun et al, 2017; Ye, Mei, Shi, Camanni, et al, 2018). Consequently, the continental margin changed its tectonic regime from long‐lasting orthogonal convergence to transpression (e.g.…”

Section: Interpretation Of Seismic Reflections: Mesozoic Convergent S...mentioning

confidence: 99%

Interactions between pre‐existing structures and rift faults: Implications for basin geometry in the northern South China Sea

Guan,

Huang,

Liu

et al. 2023

Basin Research

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The northern South China Sea (SCS) margin evolved from the Mesozoic convergent to Cenozoic divergent continental margin, and thus, it developed on a heterogeneous crystalline basement with inherited Mesozoic structures. Pre‐existing structures and their interactions with rift faults have historically not been described or interpreted in the intensely stretched Baiyun sub‐basin. Large‐scale 3D seismic reflection data allow us to identify four types of Mesozoic tectonic fabrics within the basement and explain their genesis: (1) Thin, isolated and north‐dipping seismic reflections 1, interpreted as thrust faults representing orogenic processes. Tilted thick seismic reflections 2 are formed by reactivation of seismic reflections 1 during post‐orogenic extension, which are all related to the NW‐ward subduction of the palaeo‐Pacific plate. (2) Thin, isolated and shallowly dipping seismic reflections 3 and low‐amplitude, semi‐transparent and chaotic seismic reflections 4 represent the low‐angle thrust system and the associated nappe units, which are related to the shift from NW‐ to NNW‐ward subduction of the paleo‐Pacific plate. Subsequently, we investigate the structural interaction between Mesozoic intra‐basement and Cenozoic rift structures. Syn‐rift, post‐rift and long‐term faults are developed in Cenozoic strata, and quantitative statistical and qualitative analyses revealed two main types of structural interactions between them and underlying intra‐basement structures: (1) Rift faults develop with inheritance of intra‐basement structures, including fully and partially inherited faults. (2) Rift faults modify intra‐basement structures, although they are controlled by intra‐basement structures at an earlier stage. Finally, our results reveal the control of pre‐existing structures on the geometry of the Baiyun sub‐basin, especially the selective reactivation of NE‐trending shear zones (SR2), which are influenced by the regional stress field and the width and dip of the shear zones.

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The sedimentary record of the Sanshui Basin: Implication to the Late Cretaceous tectonic evolution in the northern margin of South China Sea

2023

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Petrogenesis of Early Cretaceous adakitic granodiorite: Implication for a crust thickening event within the Cathaysia Block, South China

Cited by 8 publications

References 84 publications

Early‐Middle Triassic high Sr/Y granites in the northern margin of the North China Craton: Petrogenesis and tectonic implications

Early‐Middle Triassic high Sr/Y granites in the northern margin of the North China Craton: Petrogenesis and tectonic implications

Interactions between pre‐existing structures and rift faults: Implications for basin geometry in the northern South China Sea

The sedimentary record of the Sanshui Basin: Implication to the Late Cretaceous tectonic evolution in the northern margin of South China Sea

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