Neoproterozoic tectonic transition in the South Qinling Belt: New constraints from geochemistry and zircon U–Pb–Hf isotopes of diorites from the Douling Complex

The characteristics of strike-slip faults and their control on hydrocarbon distribution in deep carbonate reservoirs of the central Sichuan Basin

“…From the Late Neoproterozoic to the Cambrian, the paleo-Qinling oceanic crust to the north of the Yangtze Plate was subducted below the Yangtze plate by the influence of the breakup of Rodinia. With an increasing dip in the subduction zone, the dynamic mechanism of the South Qinling Plate changed from a subduction-convergence mechanism to one of retreat-extension (Zhu et al, 2014;2015;Hu et al, 2015;Xiang et al, 2015;Wang et al, 2017;Zhang et al, 2018), forming an interior rifting of the Yangtze Plate due to the tensional setting (Niu et al, 2003;Stein and Stein, 2013). Simultaneously, the western margin of the Yangtze Plate converged to the northern margin of East Gondwana by subduction (Moghadam et al, 2013;Chen et al, 2018), resulting in a transtensional setting within the Yangtze Plate due to slab pull.…”

Geochemical and zircon U-Pb-Hf isotopic study of volcanic rocks from the Yaolinghe Group, South Qinling orogenic belt, China: Constraints on the assembly and breakup of Rodinia

“…750-685 Ma (Fig. 2; Zhang et al, 2004Zhang et al, , 2018Chen et al, 2006;Nie et al, 2019;Wang et al, 2019;Li et al, 2020a).…”

“…The Neoarchean-Paleoproterozoic Douling block was widely intruded by gabbros, diorites and granites of ca. 750-685 Ma (Zhang et al, 2004(Zhang et al, , 2018Chen et al, 2006;Bai et al, 2019;Nie et al, 2019;Wang et al, 2019). The gabbros and diorites belong to the arc-related calc-alkaline series with εNd (t) values ranging from − 3.2 to + 6.0, indicating a magma source derived from the mantle wedge above a 947 ± 14 Ma Huashan ophiolite (Shi et al, 2011) 866-858 Ma I-type granite (Xu et al, 2016) 871 ± 7 Ma calcalkaline mafic dikes et al, 2016) 877 ± 9 Ma I-type granite (Liao et al, 2016) 864 ± 2 Ma gabbro (Liu et al, 2011) 868-858 Ma granitic gneiss (Zhang et al, 2016) 941-884 Ma diorite (Hu et al, 2016) Future Xiaomoling Complex 885 ± 4 diorite (Yan et al, 2014)…”

“…Continental crust 748-714 Ma I-type and S-type granites (Nie et al, 2019) 750-697 Ma I-type diorite (Zhang et al, 2018;Wang et al, 2019) 717-685 Ma I-type granodiorites (Zhang et al, 2004;Chen et al, 2006;Bai et al, 2019) 721-714 Ma meta-granites (Liu and Zhang, 2013) 747-719 Ma meta-rhyolitic tuff (Liu and Zhang, 2013) Vo lc an ic -s ed im en ta ry se qu en ce s in th e Ya ol in gh e, W ud an g, an d Su ix ia n G ro up s 749-728 Ma granite and diorite (Wang et al, 2019) 742-704 Ma granite and diorite (Yang et al, 2012) 716-705 Ma meta-granites (Wang et al, 2017) 750-680 Ma volcanic rocks and sandstone (Table S4) 663-644 Ma A-type granite 651-627 Ma riftrelated gabbro dyke (Zhao and Asimow, 2018) 632 ± 6 Ma troctolite (Xue et al, 2011) 637 ± 4 Ma Lherzolite 633 ± 2 Ma mafic dyke (Qiu et al, 2021) 667 ± 4 Ma A1-type granite (Zhang et al, 2018) 679-651 Ma gabbro dykes (Ling et al, 2008;Zhu et al, 2005)…”

“…1a) and has been considered a segment of the northern margin of the Yangtze craton (Zhang et al, 2001;Ling et al, 2008;Dong et al, 2011a), preserving abundant Neoproterozoic volcanosedimentary strata and magmatic intrusions with ages in the range of ca. 960-600 Ma (Niu et al, 2006;Liu and Zhang, 2013;Zhu et al, 2014;Hu et al, 2016;Wang et al, 2016bWang et al, , 2017Wang et al, , 2019Wang et al, , 2021Zhang et al, 2016Zhang et al, , 2018Dong et al, 2017;Nie et al, 2019;Liu et al, 2022). It is generally accepted that the early Neoproterozoic magmatic rocks were formed in subduction-related settings (Zhu et al, 2014;Hu et al, 2016;Zhang et al, 2016).…”