Cross Orogenic Belts in Central China: Implications for the tectonic and paleogeographic evolution of the East Asian continental collage

Dong, Yunpeng; Sun, Shengsi; Santosh, M.; Sun, Jiaopeng; Zhang, Feifei; Cheng, Bin; Yang, Zhao; Shi, Xiaohui; He, Dengfa; Yang, Lei; Cheng, Chao; Liu, Xiaoming; Xiao-hong, Zhou; Wang, Wei; Qi, Nan

doi:10.1016/j.gr.2022.04.012

Cited by 64 publications

(23 citation statements)

References 589 publications

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“…Located between the Yangtze Block and the Cathaysia Block, the Jiangnan Orogen is an NNE‐ trending belt extending for 1500 km from north‐eastern Guizhou Province to northern Jiangxi Province and southern Anhui Province (Figure 1a) (Shu et al, 1995, Shu, 2012, Shu et al, 2019; Charvet et al, 1996; Zhao & Cawood, 1999; Zhou et al, 2004; Wang et al, 2007; Wang, Wyman, et al, 2010; Dong et al, 2012; Zhang & Wang, 2019; Dong et al, 2021, 2022). The oldest metamorphic basement rocks in the Yangtze Block are exposed in the Kongling and Yudongzi area, including 3.4–3.2 Ga and 2.9–2.8 Ga TTG gneisses and 3.2 Ga migmatites (Gao, Jie, et al, 2011; Hui et al, 2017; Hui et al, 2019; Li et al, 2014; Qiu et al, 2000; Zhang et al, 2006; Zheng et al, 2006).…”

Section: Geological Background and Samplingmentioning

confidence: 99%

Geochronology and geochemistry of basalts from the Yingchuan Formation, eastern Jiangnan Orogen: Implications for the Neoproterozoic tectonic evolution of the South China Block

Chen

Wang

et al. 2023

Geological Journal

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The Neoproterozoic magmatism along the Jiangnan Orogen preserves significant information for understanding the tectonic evolution of the South China Block (SCB). We conducted a systematic zircon U–Pb geochronological and whole‐rock geochemical study on the basalts from the Yingchuan Formation in the eastern Jiangnan Orogen, SCB. The basalts yielded a weighted mean 206Pb/238U age of 817 ± 13 Ma, enriched in Rb, Th, U, LREE and HFSE (e.g., Zr and Ti). The basalts have positive εNd(t) (+1.9 to +2.1) and high (87Sr/86Sr)i (0.69853–0.70737), indicating a slightly depleted mantle source. The high La/Nb (2.14–2.35) and La/Ta (28.6–33.3) ratios indicate a lithospheric mantle source for the basalts. Their high Ba/Yb (7.85–44.3) and Th/Yb (0.59–0.74) ratios and high absolute Nb contents (7.64–11.6 ug/g) indicate that the lithospheric mantle source has been metasomatized by melts and fluids derived from a subducted slab. The basalts are characterized by (La/Yb) N ratios (3.0–3.5) and Sm/Nd ratios (0.24–0.26), comparable to intra‐continental back arc basin basalts (BABBs). Their Ta/Yb (0.14–0.16) and Th/Yb (0.59–0.74) ratios are similar to those of Okinawa Trough basalts and contemporary mafic rocks formed in the back‐arc basin in the Jiangnan Orogen. Combined with their source features, we propose that the basalts were formed in a back‐arc basin setting. The identification of BABBs from the Yingchuan Formation shows that there were Neoproterozoic back‐arc basins in the south‐eastern Yangtze Block, indicating that the final assembly between the Yangtze and Cathaysia blocks did not occur before ca. 817 Ma.

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Section: Geological Background and Samplingmentioning

confidence: 99%

Geochronology and geochemistry of basalts from the Yingchuan Formation, eastern Jiangnan Orogen: Implications for the Neoproterozoic tectonic evolution of the South China Block

Chen

Wang

et al. 2023

Geological Journal

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“…It is bordered by the southern margin of the North China Plate to the north, and the northern margin of the Yangtze Plate to the south, while the northeastern front of the Tibetan Plateau lines its western border (Figure 1). The West Qinling region has experienced the formation and evolution stages of the Neoarchean–Paleoproterozoic Precambrian basement, the Neoproterozoic–Palaeozoic tectonic plate evolution, as well as the evolution process of the intracontinental orogenic stage since the Mesozoic, which have resulted in the current tectonic framework (Dong et al, 2011; Dong, Shi, et al, 2022; Dong, Sun, et al, 2022; Wei, Wang, Hu, et al, 2022; Wei, Wang, Mei, et al, 2022; Zhang et al, 1997, 2004). During the early–middle Palaeozoic Era, the Shangdan Suture Zone was formed by the northward subduction and collision of the South Qinling Ocean basin (Kröner et al, 1993; Mattauer et al, 1985; Meng & Zhang, 2000).…”

Section: Geological Settingmentioning

confidence: 99%

Trace elements of sulfides in the Dengjiashan Pb–Zn deposit from West Qinling, China: Implications for mineralization conditions and genesis

et al. 2023

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Dengjiashan is a large‐scale Pb–Zn deposit discovered in the western part of the Xicheng ore field within the West Qinling metallogenic belt. Information regarding the distribution and occurrence of trace elements in ore minerals and mineralization, as well as the genesis of this deposit, remains scarce. Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) analysis and elemental mapping were used to determine the distribution and occurrence of trace elements in the sulfide minerals of the Dengjiashan deposit, as well as delineate the process of its genesis. Our results showed that the trace elements enriched in the different sulfides were significantly different. Sphalerite is the main carrier mineral of the scattered elements Cd, Ge and Ga. Based on the trace element content and ratio, principal component analysis and colour of the sphalerite and pyrite, the deposit likely formed in a medium‐temperature environment. The comparative analysis of trace elements from multiple deposits of different origins, combined with the geological characteristics and distribution of sulfide trace elements, suggests that Dengjiashan is a sedimentary exhalative (SEDEX)‐type deposit. As the metallogenic process had a closer relationship to medium‐low temperature hot brine and later tectonic metamorphic hydrothermal fluid, than with magmatic hydrothermal fluid, the deposit is likely of non‐magmatic SEDEX–hot brine superimposed transition origin. This study provides additional insight on the distribution of trace elements in the sulfide minerals of the Dengjiashan deposit, as well as the processes that led to its formation, and may further facilitate ongoing and future key metal prospecting and exploration efforts.

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“…The trails of the Proto‐Tethys Ocean in East Asia are represented by ophiolitic mélanges distributed along the Qilian, Northern Kunlun and Northern Qinling Orogens in the Central China Orogenic Belt (CCOB) between the Northern and Southern China continental blocks (Figure 1a; Dong et al, 2021; Zhang, 1988). The Qinling Orogen in the eastern CCOB, separating the North China Block (NCB) from South China Block (NCB) with different geology, geography, environment, ecology, economy and culture (Dong et al, 2022), was constructed through multiple subduction and collision that finally sutured the NCB and SCB along the Shangdan and Mianlue sutures which mark the Proto‐Tethys and Paleo‐Tethys, respectively (Dong et al, 1999, 2021; Dong & Santosh, 2016; Dong, Zhang, Neubauer, et al, 2011; Hu et al, 2018, 2020; Li et al, 1996; Meng et al, 2019; Xu et al, 2002; Zhang et al, 1995, 2001). During past decades, detailed investigations have revealed the Shangdan Suture and the Erlangping Suture in the Northern Qinling Orogen (Figure 1a; Dong et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Ordovician tectonic transition from passive margin into peripheral foreland in the southern Ordos: A diagnostic insight into the closure of Erlangping Ocean between the North Qinling Arc and North China Block

et al. 2022

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Achieving a reliable closure time of a back-arc ocean is an essential aspect in studies on detailed tectonic processes of an active continental margin and arc-continent collision. This is particularly the case for the northern Qinling Orogen, which records the accretion of the North Qinling Arc (NQA) onto the North China Block (NCB) after the Erlangping back-arc ocean closure. Sedimentological, petrological and geochronological signatures from the Ordovician successions in the southern Ordos reveal a tectonic transition from passive continental margin to peripheral foreland in the southern NCB at the beginning of Katian. Sedimentological and geochronological investigations reveal an abrupt shift of accelerating basin subsidence and deepening at the earliest Katian, separating ca. 300-m-thick shallow-marine carbonate shelf assemblages from overlying ca. 2000-m-thick deep-water carbonate slope and turbidite associations. Zircon age spectra of the Katian turbidites are characterized by early-Palaeozoic and Neoproterozoic age clusters, which are different from those of the Middle Ordovician quartz arenites sourced merely from the NCB basement. Instead, these age patterns match well with those of the coeval successions in the northern NQA, indicating a spatially linked abyssal deposystem. Stratigraphic architecture deciphers a typical foreland basin geometry, involving, from south to north, northward-propagating turbiditic wedge, northward-backstepping carbonate slope and progressively shoaling carbonate platform, embodying foredeep, forebulge and backbulge, respectively. These characteristics of basin-fill evolution reflect the northward migration of the flexural wave as a dynamic response to the northward expansion of the thickened NQA thrust wedge. Together with the other geological and geochronological data, our new insights indicate a southward subduction polarity of the Erlangping back-arc oceanic crust followed by its termination at ca. 450 Ma, which was earlier than that of the main Proto-Tethyan Shangdan Ocean between

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Cross Orogenic Belts in Central China: Implications for the tectonic and paleogeographic evolution of the East Asian continental collage

Cited by 64 publications

References 589 publications

Geochronology and geochemistry of basalts from the Yingchuan Formation, eastern Jiangnan Orogen: Implications for the Neoproterozoic tectonic evolution of the South China Block

Geochronology and geochemistry of basalts from the Yingchuan Formation, eastern Jiangnan Orogen: Implications for the Neoproterozoic tectonic evolution of the South China Block

Trace elements of sulfides in the Dengjiashan Pb–Zn deposit from West Qinling, China: Implications for mineralization conditions and genesis

Ordovician tectonic transition from passive margin into peripheral foreland in the southern Ordos: A diagnostic insight into the closure of Erlangping Ocean between the North Qinling Arc and North China Block

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