The geochemical evolution of syncollisional magmatism and the implications for significant magmatic-hydrothermal lead–zinc mineralization (Gangdese, Tibet)

Zhou, Jian; Yang, Zhen; Hou, Zhiyuan; Liu, Yingchao; Zhao, Xi; Zhang, Xiong; Zhao, Miao; Ma, Weiqiang

doi:10.1016/j.lithos.2017.07.004

Cited by 20 publications

(23 citation statements)

References 70 publications

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“…However, several Pb–Zn deposits such as Luobuzhen (Sun et al, ), Nuocang (Jiang et al, ), Dajiacuo, and Chazi (Gao, ) have recently been discovered in the middle segment of the southern Lhasa terrane (Figure b). Skarn is the major type of mineralization, with a small amount of breccia pipe, vein‐type, and manto deposits (Zheng, Sun, et al, ; Zhou et al, ). The Pb–Zn mineralization mainly occurred at ca.…”

Section: Regional Geologymentioning

confidence: 99%

“…The Pb–Zn mineralization mainly occurred at ca. 65–50 Ma; the Pb–Zn mineralization is generally granite‐related in origin and shows genetic links to ancient continental crust materials (Table ; Hou et al, ; Zheng, Sun, et al, ; Fu et al, ; Zhou et al, ).…”

Section: Regional Geologymentioning

confidence: 99%

“…The Cu–Mo mineralization occurred in a post‐collisional setting (~25–0 Ma) is mainly distributed in the southern Lhasa terrane (Hou & Cook, ; Hu et al, ; Li et al, ; Qu, Hou, Zaw, & Li, ; Sun et al, ; Wang, Richards, Hou, & Yang, ; Yang, Lu, Hou, & Chang, ; Zheng et al, , ), whereas Pb–Zn mineralization is dominantly located in the central Lhasa terrane, which developed at ca. 65–50 Ma (Fei et al, ; Fu et al, ; Hou et al, ; Zhao et al, ; Zheng et al, ; Zhou et al, ). The Pb–Zn mineralization in the central Lhasa terrane is mainly associated with felsic intrusions (Fu et al, ; Hou et al, ; Zheng, Sun, et al, ; Zhou et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…65–50 Ma (Fei et al, ; Fu et al, ; Hou et al, ; Zhao et al, ; Zheng et al, ; Zhou et al, ). The Pb–Zn mineralization in the central Lhasa terrane is mainly associated with felsic intrusions (Fu et al, ; Hou et al, ; Zheng, Sun, et al, ; Zhou et al, ). However, the genetic types of the felsic intrusions are still debated; Fu et al () proposed that they are S‐type granites, while Zhou et al () argued that they are I‐type granites.…”

Section: Introductionmentioning

confidence: 99%

“…The Pb–Zn mineralization in the central Lhasa terrane is mainly associated with felsic intrusions (Fu et al, ; Hou et al, ; Zheng, Sun, et al, ; Zhou et al, ). However, the genetic types of the felsic intrusions are still debated; Fu et al () proposed that they are S‐type granites, while Zhou et al () argued that they are I‐type granites. The Pb–Zn–(Ag) mineralization in the central Lhasa terrane shows genetic links to ancient continental crust materials (Fu et al, ; Zheng, Sun, et al, ); recent Hf isotopic mapping shows that the middle segment of the southern Lhasa terrane (Figure b) is also an ancient block (Hou et al, ), but it has not attracted adequate attention for prospecting of intrusions‐related Pb–Zn deposits in this region.…”

Section: Introductionmentioning

confidence: 99%

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Zircon U–Pb dating, geochemistry, and Sr–Nd–Pb–Hf isotopes of the subvolcanic intrusion from Beina Pb–Zn–(Ag) deposit in the southern Lhasa terrane, Tibet: Implications for petrogenesis and mineralization

et al. 2018

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The Beina Pb–Zn–(Ag) deposit is a newly discovered deposit situated in the southern Lhasa terrane, Tibet. LA‐ICP‐MS U–Pb dating for the ore‐bearing rhyolite porphyry indicates that it was emplaced at 64.6 Ma. The Beina rhyolite porphyry displays high SiO2 (74.31–76.52 wt%), K2O + Na2O (6.99–8.05 wt%), and A/CNK (0.97–1.33), similar to the peraluminous S‐type granites related to Pb–Zn–(Ag) mineralization in the central Lhasa terrane. The Beina rhyolite porphyry is strongly depleted in Nb, Ta, Ti, P, Sr, and Ba, enriched in Rb, K, Th, U, and Pb, enriched in light rare earth elements (LREEs), slightly depleted in heavy rare earth elements (HREEs) (LaN/YbN = 6.52–9.28), and has moderate negative Eu anomalies (δEu = 0.38–0.48), showing an arc affinity. It also shows high CaO/Na2O ratios (0.21–0.73), low Rb/Ba (0.30–0.46), and Rb/Sr ratios (1.17–4.01), indicating that it was mainly derived from partial melting of a clay‐poor, plagioclase‐rich metapsammitic source. The samples have relatively high 87Sr/86Sr(i) (0.7084–0.7092) and Pb isotopes (206Pb/204Pb = 18.61–18.74, 207Pb/204Pb = 15.65–15.68, 208Pb/204Pb = 38.99–39.14) and low εNd(t) (−8.6 to −7.2) and εHf(t) (−8.6 to −4.8) values, yielding ancient two‐stage Nd model ages (1,459–1,569 Ma) and two‐stage Hf model ages (1,433–1,684 Ma), respectively. The Beina rhyolite porphyry was formed at relatively high temperatures (average 817°C) according to zircon saturation thermometer. These results reveal that Beina rhyolite porphyry was generated by partial melting of ancient crustal materials (dominated by metapsammite) heated by mantle‐derived magma during rollback of the Neo‐Tethyan oceanic slab. In addition, our research suggests that both I‐ and S‐type granites related to Pb–Zn mineralization are believed to exist in the Lhasa terrane. Similar to the central Lhasa terrane, the middle segment of the southern Lhasa terrane (83°E–87°E) is also an ancient block, large‐scaled silicic volcanic rocks of the Linzizong Group, and coeval plutons are widely exposed and several Pb–Zn deposits have recently been discovered in the Nuocang–Chazi area. All these facts indicate that there is a great potential for prospecting of intrusions‐related Pb–Zn deposits in the middle segment of the southern Lhasa terrane.

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Section: Regional Geologymentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zircon U–Pb dating, geochemistry, and Sr–Nd–Pb–Hf isotopes of the subvolcanic intrusion from Beina Pb–Zn–(Ag) deposit in the southern Lhasa terrane, Tibet: Implications for petrogenesis and mineralization

et al. 2018

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Sulphur and lead isotopic compositions of the Pb–Zn polymetallic deposits in the Linzizong volcanic area, Gangdese belt, Tibet: Implications for variation characteristics of ore‐forming material sources and exploration targeting

et al. 2019

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Relatively little attention has been given to variations in ore-forming metal sources of Pb-Zn polymetallic deposits hosted in or near the Linzizong volcanic rocks from the eastern to western Gangdese belt. Based on the S and Pb isotopic data of typical Pb-Zn polymetallic deposits from the eastern to western Gangdese, the oreforming sources are discerned. The δ 34 S V-CDT values of the typical Pb-Zn polymetallic deposits in the Gangdese metallogenic belt have a relatively large range of −11.6‰ to 6.0‰, different from those of the porphyry Cu ± Mo ± Au deposits (mainly vary from −2.0‰ to 1.0‰) in the Gangdese metallogenic belt, indicating that the sulphur in the ore-forming fluid of Pb-Zn polymetallic deposits was dominantly of magmatic origin, but also influenced by strata nearby. The Nuocang and Beina deposits in the western Gangdese have a predominantly upper crustal source of Pb (average values: 207 Pb/ 204 Pb = 15.705, 208 Pb/ 204 Pb = 39.102), while the Narusongduo and Dexin deposits in the central Gangdese and the Leqingla and Xingaguo deposits in the eastern Gangdese are characterized by a mixed source in which Pb was derived from both the subducted slab and the ancient Lhasa basement. From the eastern to western Gangdese, Pb isotopic data show a gradually increasing scale of crustal materials from the Lhasa terrane basement. Combined with the geochemical data of the ore-relatedintrusions and Linzizong volcanic rocks from the six deposits, or nearby, we proposed that the heterogeneity of Lhasa terrane crust resulted in more ancient Lhasa basement components contributing to ore-forming sources from the eastern to western Gangdese. Moreover, relatively higher contents of Au, Ag elements could be identified in the Linzizong volcanic rocks of the western Gangdese than those of in the central and eastern Gangdese. Therefore, in addition to finding the cryptoexplosive breccia, epithermal, skarn, hydrothermal vein-type Pb-Zn polymetallic deposits, there is exploration potential for epithermal Au-Ag deposits associated with the Linzizong volcanic rocks, western Gangdese. KEYWORDS lead isotope, Linzizong volcanic area, Pb-Zn polymetallic deposits, sulphur isotope, western Gangdese

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Mineralogy and whole-rock geochemistry of the Oligocene Barail Group of rocks of Belt of Schuppen, Northeast India: Implications for tectono-provenance and paleo-weathering

Gogoi,

Dong,

Borgohain

et al. 2024

Acta Geochim

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The geochemical evolution of syncollisional magmatism and the implications for significant magmatic-hydrothermal lead–zinc mineralization (Gangdese, Tibet)

Cited by 20 publications

References 70 publications

Zircon U–Pb dating, geochemistry, and Sr–Nd–Pb–Hf isotopes of the subvolcanic intrusion from Beina Pb–Zn–(Ag) deposit in the southern Lhasa terrane, Tibet: Implications for petrogenesis and mineralization

Zircon U–Pb dating, geochemistry, and Sr–Nd–Pb–Hf isotopes of the subvolcanic intrusion from Beina Pb–Zn–(Ag) deposit in the southern Lhasa terrane, Tibet: Implications for petrogenesis and mineralization

Sulphur and lead isotopic compositions of the Pb–Zn polymetallic deposits in the Linzizong volcanic area, Gangdese belt, Tibet: Implications for variation characteristics of ore‐forming material sources and exploration targeting

Mineralogy and whole-rock geochemistry of the Oligocene Barail Group of rocks of Belt of Schuppen, Northeast India: Implications for tectono-provenance and paleo-weathering

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