Geological and geochemical characteristics of the Jiaoxi deposit in the western Bangong-Nujiang metallogenic belt, Tibet

Yong, Wang; Wang, Liqiang; Yang, Fan; Shen, Li; Danzhen, Wangxiu; Zheng, Shao-Hui; Gao, Teng

doi:10.18654/1000-0569/2019.03.07

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…New He isotope data show that geothermal fields on the Gar and Menshi-Kailas segments, as well as the Langjiu geothermal field off the KKF, are characterized by degassing of crustal fluids (Figures 2 and 3a). As mentioned in the Introduction, previous studies (Hoke et al, 2000;Klemperer et al, 2013Klemperer et al, , 2022Zhao et al, 2002) identified mantle He degassing at Menshi and Langjiu (Figure 1). Notably, those samples with mantle He inputs (3.5%-28% at Menshi and 2.1%-3.1% at Langjiu) were collected in the 1990s, while the post-2015 samples (i.e., 2021 and 2022 at Menshi and Langjiu (this study); 2015 and 2019 at Langjiu (Sun et al, 2023)) collectively provide unambiguous evidence for crustal degassing (Figure S1 in Supporting Information S1).…”

Section: Regional 3 He/ 4 He Variability and Possible Temporal Changesmentioning

confidence: 71%

Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike‐Slip Faulting

Zhang,

Xie,

Liu

et al. 2024

Geophysical Research Letters

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The Karakoram fault (KKF) is an important strike‐slip boundary for accommodating deformation following the India‐Asia collision. However, whether the deformation is confined to the crust or whether it extends into the mantle remains highly debated. Here, we show that the KKF is overwhelmingly dominated by crustal degassing related to a 4He‐ and CO2‐rich fluid reservoir (for example, He contents up to ∼1.0–1.6 vol.%; 3He/4He = 0.027 ± 0.013 RA (1σ, n = 47); CO2/N2 up to 3.7–57.8). Crustal‐scale active deformation driven by strike‐slip faulting could mobilize 4He and CO2 from the fault zone rocks, which subsequently accumulate in the hydrothermal system. The KKF may have limited fluid connections to the mantle, and if any, the accumulated crustal fluids would efficiently dilute the uprising mantle fluids. In both cases, crustal deformation is evidently the first‐order response to strike‐slip faulting.

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Section: Regional 3 He/ 4 He Variability and Possible Temporal Changesmentioning

confidence: 71%

Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike‐Slip Faulting

Zhang,

Xie,

Liu

et al. 2024

Geophysical Research Letters

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“…However, Xu et al (2017) and Xu et al (2020) believe that the Jiagang deposit is a greisen-type tungsten deposit, based on widely developed greisen alteration and the occurrence characteristics of ore veins. The Jiaoxi W deposit is a typical quartz-vein type tungsten deposit (Wang et al, 2018b;Wang et al, 2018c;Wang et al, 2019e). The wolframite-bearing quartz veins are hosted in the monzonitic granite and surrounding country rocks of both of these deposits.…”

Section: Quartz-vein Tungsten (Molybdenite) Depositsmentioning

confidence: 99%

Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

et al. 2023

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The Bangong–Nujiang metallogenic belt consists of scattered Tethyan oceanic blocks, mainly distributed underneath the margins of the Qiangtang and Lhasa terranes in central Tibet. A new world-class metallogenic belt has been reported in this region recently, based on the geological mapping and ore deposit prospecting over the last two decades. It currently comprises inferred resources of 30 Mt Cu and 500 t Au, together with several Cr–Ni, Fe, and W (Mo) resources, forming a significant potential area for future mineral exploration. These metals are mainly hosted in porphyry copper, skarn copper, skarn iron, orogenic gold, quartz-vein tungsten, and ophitic chromite deposits. The mineral deposits in the Bangong–Nujiang metallogenic belt have been widely recognized in different localities, including the southern edge of the southern Qiangtang block, part of the north Lhasa block, and even part of the central Lhasa block, indicating they were formed in variable geological settings, from the initial opening, subduction, and collision to the extension of the Bangong–Nujiang Ocean. Specifically, five major tectonic events contributed to mineralization, including the stage 1 (240–165 Ma) initial opening of the Bangong–Nujiang Ocean, stage 2 (165–145 Ma) oceanic subduction, stage 3 (145–100 Ma) close of the ocean, stage 4 (100–65 Ma) continent–continent collisional orogenesis, and stage 5 (65–0 Ma) post-orogenesis. At stage 1, Cr–Ni deposits were formed during the initial opening of the ocean; porphyry–epithermal Cu (Au), skarn Fe, and minor orogenic Au deposits were formed at stage 2 and stage 3; a younger pulse of a few porphyry–skarn Cu ± Mo and orogenic Au deposits were formed during stage 4; finally, W(Mo) deposits were generated in stage 5. In general, porphyry Cu systems, orogenic Au, and skarn Cu polymetallic deposits that occurred in the subduction and post-collision settings related W(Mo) deposits have the most potential for future exploration. An in-depth investigation of several scientific problems, such as addressing the tectonic setting, magmatism, and metallogeny of this region and genetic linkage of these deposit preservations to plateau uplift, is essential for the future success of exploration in the Bangong–Nujiang metallogenic belt.

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The first intra-oceanic island-arc porphyry Cu (Au) deposit in the western Bangong-Nujiang suture zone: Evidence from the Saidengnan Cu (Au) deposit

et al. 2022

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Geological and geochemical characteristics of the Jiaoxi deposit in the western Bangong-Nujiang metallogenic belt, Tibet

Cited by 6 publications

References 19 publications

Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike‐Slip Faulting

Hydrothermal Degassing Through the Karakoram Fault, Western Tibet: Insights Into Active Deformation Driven by Continental Strike‐Slip Faulting

Metallogeny in the Bangong–Nujiang belt, central Tibet, China: A review

The first intra-oceanic island-arc porphyry Cu (Au) deposit in the western Bangong-Nujiang suture zone: Evidence from the Saidengnan Cu (Au) deposit

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