Isotopic geochemistry, zircon U–Pb ages and Hf isotopes of A-type granites from the Xitian W–Sn deposit, SE China: Constraints on petrogenesis and tectonic significance

Zhou, Yun; Liang, Xinmiao; Wu, Shichong; Cai, Yongfeng; Liang, Xirong; Shao, Tongbin; Wang, Ce; Fu, Jiangang; Jiang, Ying

doi:10.1016/j.jseaes.2015.03.006

Cited by 67 publications

(48 citation statements)

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“…Nearly all of the polymetallic tungsten and tin deposits in South China are associated with Late Mesozoic granites, and are located at the endo-and exo-contacts of granitic intrusions (Mao and Li, 1995;Mao et al, , 1996aMao et al, , 1996bZaw et al, 2007;Yin et al, 2002;Wang et al, 2008;Guo et al, 2011Guo et al, , 2014. The Yanshanian plutons consist predominantly of seriate or porphyritic monzogranites, composed of quartz (25-30%), K-feldspar and plagioclase (25-45%) with a K-feldspar/plagioclase ratio of N 1, and minor biotite (Fu et al, 2004a(Fu et al, , 2004bLi et al, 2004;Zhu et al, 2005;Zhang et al, 2006;Wei et al, 2007;Yao et al, 2007;Yang et al, 2009aYang et al, , 2009bGuo et al, 2011;Zhou et al, 2015). Accessory minerals comprise tantalite, ilmenite, wolframite, cassiterite, molybdenite, apatite, titanite, magnetite, zircon and fluorite.…”

Section: Regional Geologymentioning

confidence: 99%

“…They are fine-grained, with or without porphyritic texture. They are composed of 28-30% quartz, 28-38% K-feldspar, 25-30% plagioclase, 5-12% biotite and minor muscovite (Fu et al, 2009;Zhou et al, 2013Zhou et al, , 2015Fig. 3c-d).…”

Section: Geology Of the Xitian Depositmentioning

confidence: 99%

“…These granites have a smaller size and a smaller content of phenocrysts and a greater content of quartz, muscovite and fluorite than the Indosinian granites. They have previously been dated as 165-147 Ma (Liu et al, 2008a;Fu et al, 2012;Chen et al, 2013;Yao et al, 2013;Zhou et al, 2013Zhou et al, , 2015.…”

Section: Geology Of the Xitian Depositmentioning

confidence: 99%

“…The Xitian Early Yanshanian granites, which are closely related to W-Sn mineralization, show some typical geochemical signatures of an A-type granite (Ma et al, 2004;Zhou et al, 2013Zhou et al, , 2015 (Zhou et al, 2015). Their insitu zircon Ɛ Hf (t) values range from -4.30 to -14.69, and their Ɛ Nd (t) values are -9.2 to -7.3, with corresponding T DM2 ages of 1.72-1.56 Ga (Yao et al, 2013;Zhou et al, 2015;Su et al, 2015).…”

Section: Re Contents and Origin Of Ore Metalsmentioning

confidence: 99%

“…Their insitu zircon Ɛ Hf (t) values range from -4.30 to -14.69, and their Ɛ Nd (t) values are -9.2 to -7.3, with corresponding T DM2 ages of 1.72-1.56 Ga (Yao et al, 2013;Zhou et al, 2015;Su et al, 2015). These characteristics indicate that the early Yanshanian granites have originated from partial melting of metamorphosed rocks in the basement, with some input of a certain amount of mantle-derived materials (Liu et al, 2008a;Yao et al, 2013;Zhou et al, 2013Zhou et al, , 2015.…”

Section: Re Contents and Origin Of Ore Metalsmentioning

confidence: 99%

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Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Liang

Dong

Jiang

et al. 2016

Ore Geology Reviews

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The Xitian tungsten-tin (W-Sn) polymetallic deposit, located in eastern Hunan Province, South China, is a recently explored region containing one of the largest W-Sn deposits in the Nanling W-Sn metallogenic province. The mineral zones in this deposit comprise skarn, greisen, structurally altered rock and quartz-vein types. The deposit is mainly hosted by Devonian dolomitic limestone at the contact with the Xitian granite complex. The Xitian granite complex consists of Indosinian (Late Triassic, and Yanshanian (Late Jurassic-Early Cretaceous, 165-141 Ma) granites. Zircons from two samples of the Xitian granite dated using laser ablationinductively coupled mass spectrometer (LA-ICPMS) U-Pb analysis yielded two ages of 225.6 ± 1.3 Ma and 151.8±1.4 Ma, representing the emplacement ages of two episodic intrusions of the Xitian granite complex. Molybdenites separated from ore-bearing quartz-veins yielded a Re-Os isochron age of 149.7±0.9 Ma, in excellent agreement with a weighted mean age of 150.3±0.5 Ma. Two samples of muscovites from ore-bearing greisens yielded 40 Ar/ 39 Ar plateau ages of 149.5±1.5 Ma and 149.4±1.5 Ma, respectively. These isotopic ages obtained from hydrothermal minerals are slightly younger than the zircon U-Pb age of 151.8±1.4 Ma of the Yanshanian granite in the Xitian area, indicating that the W-Sn mineralization is genetically related to the Late Jurassic magmatism. The Xitian deposit is a good example of the Early Yanshanian regional W-Sn ore-forming event (160-150 Ma) in the Nanling region. The relatively high Re contents (8.7 to 44.0 ppm, average of 30.5 ppm) in molybdenites suggest a mixture of mantle and crustal sources in the genesis of the ore-forming fluids and melts. Based upon previous geochemical studies of Early Yanshanian granite and regional geology, we argue that the Xitian W-Sn polymetallic deposit can be attributed to back-arc lithosphere extension in the region, which was probably triggered by the break-off of the flat-slab of the Palae-Pacific plate beneath the lithosphere.

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Section: Regional Geologymentioning

confidence: 99%

Section: Geology Of the Xitian Depositmentioning

confidence: 99%

Section: Geology Of the Xitian Depositmentioning

confidence: 99%

Section: Re Contents and Origin Of Ore Metalsmentioning

confidence: 99%

Section: Re Contents and Origin Of Ore Metalsmentioning

confidence: 99%

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Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Liang

Dong

Jiang

et al. 2016

Ore Geology Reviews

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Mesozoic multi‐stage W–Sn polymetallic mineralization in the Nanling Range, South China: An example from the Dengfuxian–Xitian ore field

Sun

Algeo

et al. 2018

Geological Journal

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The Dengfuxian and Xitian ore fields, located in the central Nanling Range of South China, are characterized by multi‐stage W–Sn polymetallic mineralization. In this study, whole‐rock and zircon compositions in altered granites from four typical deposits in these ore fields (i.e., Dalong Pb–Zn, Xiangdong W, Gaolong fluorite, and Shaiheling Sn–Pb–Zn) were studied to constrain their fluid chemistry and mineralization history. Compared to unaltered granites at Dengfuxian and Xitian, these fluid‐altered granites are characterized by more variable SiO2 (64.2–78.4%) and lower TiO2 (0.02–0.12%), CaO (0.25–1.2%), and Na2O (0.31–2.6%) concentrations, lower ΣREE (87–156 ppm), and higher Zr/Hf (11.1–31.6) and Y/Ho (31.1–53.4) ratios, suggesting intense F‐rich fluid metasomatism. Zircon cathodoluminescence (CL), transmitted light and back‐scattered electron (BSE) imaging, laser ablation multi‐collector inductively coupled plasma mass spectrometry (LA‐MC‐ICP‐MS) trace‐element analysis, U–Pb dating, and Hf isotopes revealed a sequence of three W–Sn polymetallic mineralization stages: a Triassic stage (~220 Ma), a Jurassic stage (~150 Ma), and a Cretaceous stage (~80 Ma). The Triassic episode was associated with a highly fractionated granitic magma derived from the lower crust and contaminated by basement rocks; the magmatic fluid was affected by a high 176Hf/177Hf component from the ~770‐Ma basement and probably precipitated under high F and high fO2 conditions. The Jurassic episode was related to mantle–crust interaction and resulted in large‐scale W–Sn mineralization at decreased fO2. The Cretaceous episode was marked by Sn mineralization in a lithospheric extensional setting. We infer that basement rocks were the major source of metals for the world‐class W–Sn ore deposits in the Nanling Range of South China. This study also demonstrates that whole‐rock geochemistry of hydrothermally altered granites in combination with Lu–Hf isotopic, U–Pb dating, and trace element analyses of magmatic and hydrothermal zircons can be a useful approach to recognition of multi‐stage magmatic and mineralization processes.

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Genesis and mineralization age of the quartz‐vein‐type scheelite deposits in Eastern Yanbian, Northeast China: Constraints on the regional tectonic setting

Chen

Ren

et al. 2019

Geological Journal

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The Eastern Yanbian area, Northeast China is tectonically located in the easternmost margin of the Xing'an Mongolian Orogenic Belt, which is a key area for providing important evidence of mineral deposits to constrain the tectonic evolution of the Paleo‐Asian Ocean. Five quartz‐vein‐type scheelite deposits have been identified in the eastern Yanbian area. These deposits are hosted within the late Palaeozoic metamorphic and granitic rocks and form under the identical hydrothermal mineralization. Zircon U–Pb ages and whole‐rock geochemistry of the ore‐hosting biotite granite and Sm–Nd ages of scheelite crystals within quartz veins are presented in this paper. Zircon U–Pb dating of the biotite granite yields a weighted mean age of 251.9 ± 2.2 Ma (mean standard weighted deviation (MSWD) = 4), and Sm–Nd dating of scheelite samples yields an isochron age of 251.7 ± 2.9 Ma (MSWD = 0.87), which constrains the scheelite mineralization in Eastern Yanbian to the late Permian. Our results, integrated with published geochronological data, indicate three periods of Phanerozoic W mineralization in Northeast China, (a) Cambrian, (b) late Permian (this work), and (c) Jurassic. Geochemical data reveal that the biotite granite is a calc‐alkaline I‐type granite, and it exhibits enrichment in large‐ion lithophile and light rare earth elements and depletion in high‐field‐strength and heavy rare earth elements (especially in Nb and Ta), consistent with the characteristics of arc magma. The subduction‐related biotite granite intrusion and quartz‐vein‐type scheelite mineralization together indicate that the Paleo‐Asian Ocean had not closed before the late Permian in the Eastern Yanbian area, and its final closure occurred in the Early‐Middle Triassic. The late Permian subduction of the Paleo‐Asian Ocean induced the partial melting of the lower crust, thus forming the magmatic arc activity and related quartz‐vein‐type scheelite mineralization, which clearly justifies the proposed tectonic–metallogenic model.

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Isotopic geochemistry, zircon U–Pb ages and Hf isotopes of A-type granites from the Xitian W–Sn deposit, SE China: Constraints on petrogenesis and tectonic significance

Cited by 67 publications

References 84 publications

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Zircon U–Pb, molybdenite Re–Os and muscovite Ar–Ar isotopic dating of the Xitian W–Sn polymetallic deposit, eastern Hunan Province, South China and its geological significance

Mesozoic multi‐stage W–Sn polymetallic mineralization in the Nanling Range, South China: An example from the Dengfuxian–Xitian ore field

Genesis and mineralization age of the quartz‐vein‐type scheelite deposits in Eastern Yanbian, Northeast China: Constraints on the regional tectonic setting

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