Diverse and multistage Mo, Au, Ag–Pb–Zn and Cu deposits in the Xiong'er Terrane, East Qinling: From Triassic Cu mineralization

Cao, Mingping; Yao, Jincao; Deng, Xiao‐Hua; Yang, Fulun; Mao, Guangzhou; Mathur, Ryan

doi:10.1016/j.oregeorev.2016.02.014

Cited by 40 publications

(13 citation statements)

References 55 publications

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“…He et al, ; this study); Dashimengou Mo deposit (J. H. Li, ; L. W. Wang, ); Huangshuian Mo deposit (J. Cao et al, ; Huang, Hou, Yang, Li, & Xu, ); Qianfanling Mo deposit (Gao et al, ; Gao, Li, Guo, Cheng, & Liu, ); Zhifang Mo deposit (X. H. Deng et al, ); Dianfang Au deposit (K. F. Tang, ); Shanggong Au deposit (S.M. Li, Qu, Li, Li, & Xu, ; Ren et al, 2006; K. F. Tang, ); and Xianglugou Cu deposit (M. Cao et al, ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 73%

“…The Xiong'ershan area exposes several Mesozoic granitic plutons and hosts numerous Au, Mo, Pb‐Zn‐Ag, and Cu deposits (Figure ), and this region ranks as the third largest gold concentration in China, following the Jiaodong and Xiaoqinling areas (J. Deng, Gong, Wang, Carranza, & Santosh, ; Fan, Hu, Wilde, Yang, & Jin, ; C. M. Wang et al, ). Available geochronological data suggest that the Mesozoic magmatic event and mineralization mainly occurred in two periods: (a) Triassic (255–208 Ma) syenite magmatism represented by the Mogou pluton and several Au, Mo, and Cu deposits (e.g., M. Cao et al, ; X. H. Deng, Chen, Santosh, Yao, & Sun, ; Gao, Mao, Ye, & Li, ; Gao, Ye, Mao, & Li, ; X. He et al, ) and (b) Middle Jurassic to Early Cretaceous (160–110 Ma) granitic magmatism and numerous Au, Mo, and Pb‐Zn‐Ag deposits (e.g., Bao, Sun, Zartman, Yao, & Gao, ; Mao et al, ; K. F. Tang, ; Tian et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies mainly focused on the Middle Jurassic to Early Cretaceous magmatic–hydrothermal events associated with the granitoid intrusions and related polymetallic mineralization (J. Deng, Gong, et al, ; Y. G. Han, Zhang, Pirajno, & Zhang, ; Mao et al, , ), mainly focusing on individual Triassic deposits (M. Cao et al, ) or the petrogenesis of the intrusions such as the Mogou pluton (J. Cao, Ye, Li, Zhang, et al ; X. He et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Triassic alkaline magmatism and mineralization in the Xiong'ershan area, East Qinling, China

et al. 2018

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The Qinling orogenic belt is a complex subduction-accretion-collision orogen that welded the North China Craton and the Yangtze Craton during the final continental collision in the Triassic. The Xiong'ershan area, located in east Qinling, exposes a typical Triassic syenite pluton and several contemporaneous Mo, Au, and Cu deposits. The aegirine-augite syenites and syenites from the Mogou pluton are characterized by alkalic to peralkalic (total alkali Na 2 O + K 2 O = 13.95-14.63 wt.%, CaO = 0.06-2.87 wt.%), and shoshonitic features (K 2 O = 11.86-14.34 wt.%). Zircon LA-ICP-MS U-Pb dating of the aegirine-augite syenite and syenite yield emplacement ages of 232.5 ± 0.6 and 221.8 ± 0.7 Ma, indicating multiple pulses of magmatism. Evidence from zircon Hf isotopes; occurrence of mafic microgranular enclaves; heterogeneous peralkaline composition; and wide ranges of MgO, Ni, and other trace elements suggest that the parental magma was mainly sourced from partial melting of Archean to Paleoproterozoic crustal sources, mixed with juvenile mantle-derived mafic magmas. The Mogou pluton was probably emplaced in the tectonic transition from syn-collision to post-collision settings and accompanying slab break-off process, from the commencement of collision at approximately 245 Ma and post-collisional extension at approximately 210 Ma. Gold, molybdenum, and copper deposits formed during the interval of 255-208 Ma, and the close temporal and spatial relationship between these Triassic polymetallic deposits and the Mogou alkaline pluton invokes a genetic linkage. The heat source for magmatismand related metallogeny is correlated to a hot upwelling asthenospheric mantle that caused partial melting of the Archean to Paleoproterozoic crustal basement, resulting in magma mixing between the two end-members.

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Section: Discussionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Triassic alkaline magmatism and mineralization in the Xiong'ershan area, East Qinling, China

et al. 2018

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Section: Introductionmentioning

confidence: 99%

“…The East Qinling metallogenic belt (EQMB) is one of the most important polymetallic mineral provinces in China (Cao et al, ; Deng, Chen, Yao, Bagas, & Tang, ; Hu et al, ; Mao et al, ; Wang, Cheng, Zhang, Deng, & Xie, ). The Huaxiong Block is a representative mineral district in EQMB that hosts various types of deposits, especially those related to the regional Mesozoic magmatic‐hydrothermal activities, for example, porphyry–skarn Mo–W, epithermal Au, and orogenic Ag–Pb–Zn–Au deposits (Cao et al, ; Chen, Pirajno, Qi, Li, & Wang, ; Chen, Ye, & Wang, ; Fan, Hu, Wilde, Yang, & Jin, ; Han et al, ; Han, Yao, Chen, Deng, & Ding, ; Mao et al, ). The ore genesis, sources of ore‐forming fluid and material, and tectonic evolution of the metallic deposits have been well documented by previous studies (Chen et al, ; Chen, Pirajno, Li, Guo, & Lai, ; Han, Zhang, Pirajno, Wang, & Zhang, ; Li, Carranza, Ni, & Guo, ; Li, Chen, Pirajno, & Ni, ; Tang et al, ; Tian et al, ; Zhang, Ye, Zhou, & Meng, ).…”

Section: Introductionmentioning

confidence: 99%

Formation timing and genesis of Madiu fluorite deposit in East Qinling, China: Constraints from fluid inclusion, geochemistry, and H–O–Sr–Nd isotopes

Pei

Zhang

et al. 2019

Geological Journal

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The Heyu fluorite ore district is newly discovered in the East Qinling metallogenic belt (EQMB), central China. In this district, the large Madiu fluorite deposit contains five Mesozoic granite‐hosted orebodies. The deposit may have formed at shallow depth and occurred as continuous veins controlled by a series of N‐S‐ or NE‐trending, steeply dipping faults. The fluorite mineralization can be divided into two stages (I and II). Fluid inclusions in stage I fluorite homogenized at 132.2°C to 342.5°C (peak at 170°C–210°C) with salinities of 0.18 to 4.43 wt% NaCl equiv, whilst those in stage II fluorite homogenized at 122.2°C to 305.7°C (peak at 130°C–170°C) and salinities of 0.18 to 3.71 wt% NaCl equiv. Raman spectroscopic analysis of the fluid inclusions reveals that they comprise predominantly H2O. The rare earth element (REE) characteristics indicate that the deposit is of hydrothermal origin. The δ18OH2O (−8.8‰ to −0.5‰) and δDH2O (−69.0‰ to −61.9‰) values show a subhorizontal trend, suggesting that the oxygen isotopic compositions were modified by fluid–rock interactions. Fluid inclusion and stable isotopic data suggest that the ore‐forming fluids belong to a meteoric water‐sourced, medium–low temperature, and low salinity NaCl–H2O system. Initial fluorite 87Sr/86Sr ratios (0.708879–0.709682) resemble those of the Heyu batholith. The water–rock reaction, which leached Ca from the host rock and increased the fluid pH, was likely causative to the ore precipitation. Geochemical and mineralization features suggest that the Madiu fluorite deposit is best classified as a fault‐controlled hydrothermal vein‐type fluorite deposit. The Sm–Nd isochron age of 118.9 ± 7.8 Ma and its regional age correlation suggest that the fluorite mineralization occurred under regional extension or lithospheric thinning setting and that the fluorite mineralization was an important component of the Early Cretaceous mineralization event in the EQMB.

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Geochemistry and U–Pb geochronology of K‐bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications

Chu

et al. 2019

Geological Journal

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The Late Ordovician Pingliang Formation in the Guanzhuang section, located in the south‐western Ordos Basin, North China, contains several K‐bentonite layers, which are important for understanding the tectonic evolution of the south‐western Ordos Basin. This study provides new geochemical and SIMS U–Pb geochronological data for the K‐bentonites to establish the Ordovician high‐resolution chronostratigraphic framework for the Ordos Basin and to provide temporal constraints of major volcanic–magmatic activity. K‐bentonites in the succession yield U–Pb zircon ages of 457.6 ± 3.8 Ma and 454.8 ± 3.8 Ma (2σ analytical uncertainty), showing a depositional age in the Sandbian Stage (Late Ordovician). The result is consistent with the biostratigraphic and astrochronologic framework, achieving the intercalibration of different dating methods. The discrimination diagrams of whole‐rock Na2O+K2O against SiO2 and Zr/TiO2 against Nb/Y and Th/Yb against Nb/Yb and Th‐Hf‐Ta indicate that the K‐bentonites have obvious arc affinities. Based on the geological background, we conclude that the K‐bentonites in the south‐western Ordos Basin were mainly deposited during the development of the North Qilian‐North Qinling volcanic arc in the Sandbian.

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Diverse and multistage Mo, Au, Ag–Pb–Zn and Cu deposits in the Xiong'er Terrane, East Qinling: From Triassic Cu mineralization

Cited by 40 publications

References 55 publications

Triassic alkaline magmatism and mineralization in the Xiong'ershan area, East Qinling, China

Triassic alkaline magmatism and mineralization in the Xiong'ershan area, East Qinling, China

Formation timing and genesis of Madiu fluorite deposit in East Qinling, China: Constraints from fluid inclusion, geochemistry, and H–O–Sr–Nd isotopes

Geochemistry and U–Pb geochronology of K‐bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications

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