Whether short-lived or prolonged duration of multistage combined magmatic and hydrothermal events in the giant Chalukou porphyry Mo deposit, China

Wang, Changming; Zhu, Junjiang; Bagas, Leon; Chen, Qi; Zhang, Zhaochong; Duan, Hongyu; Liu, Lijun

doi:10.1016/j.oregeorev.2021.104576

Cited by 2 publications

(5 citation statements)

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“…Hf isotope data, expressed as values of εHf (Duan et al, 2018;Jin, 2016;Y. Liu, Bagas, et al, 2017;Nie et al, 2011Nie et al, , 2013Wang et al, 2022;Zhao et al, 2021). In this paper, the zircon U-Pb ages of pre- Zircon Hf isotopes can well-constrain the properties of magmatic origins (Griffin et al, 2002).…”

Section: Zircon Hf Isotopesmentioning

confidence: 75%

“…The results of previous determinations of the ages of the different lithological units in the Chalukou district show that the zircon U–Pb ages of pre‐ and post‐mineralization intrusive rocks are 162–172 Ma and142–131 Ma (Duan et al, 2018; Jin, 2016; Z. Z. Li, Qin, et al, 2014; Y. Liu, Bagas, et al, 2017; J. Liu, Mao, Wu, Wang, Luo, & Hu, 2014; Nie et al, 2011, 2013; Wang et al, 2022; C. Zhang & Li, 2017; Zhao et al, 2021). In this paper, the zircon U‐Pb ages of pre‐mineralization monzogranite and post‐mineralization feldspar porphyry are 165 Ma and 134 Ma, which is consistent with the previous results.…”

Section: Discussionmentioning

confidence: 99%

“…At Chalukou, quartz of pre‐mineralization monzogranite shows myrmekitic texture, which indicates the saturation of magmatic volatile phase. Unidirectional solidification textures (USTs) can be seen in the apical part of the ore‐forming fine‐grained porphyry intrusions (Wang et al, 2022; Zhao et al, 2021), which is direct evidence for accumulation of ore‐forming fluid (Lowenstern & Sinclair, 1996). Together with the above research results, we believe that the Chalukou deposit is formed by the continuous exsolution of large amounts of fluid.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies mainly focused on geochronology (Duan et al, 2018; Z. Z. Li, Qin, et al, 2014; J. Liu, Mao, Wu, Wang, Luo, & Hu, 2014; Nie et al, 2011; Wang et al, 2022; C. Zhang & Li, 2017), geochemical characteristics (X. L. Hu, 2015; Z. Z. Li, Qin, et al, 2014; J. Liu et al, 2015) and ore‐forming fluid inclusion (J. Liu, Mao, Wu, Wang, Luo, Hu et al, 2014; Xiong, He, Yao, Cui, Hu, & Chen, 2014; Zhu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…The Chalukou Mo deposit (2.46 Mt at 0.087% Mo) is the largest Mo deposit in NE China. Previous studies mainly focused on geochronology (Duan et al, 2018;Nie et al, 2011;Wang et al, 2022;, geochemical characteristics (X. L. Hu, 2015; Z. Z.…”

mentioning

confidence: 99%

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The key role of volatile‐rich magma in the formation of porphyry molybdenum deposits: A case study of the Chalukou deposit, China

et al. 2023

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Volatile element abundance is a crucial factor triggering mineralization and controlling the enrichment of molybdenum in porphyry deposits. The Chalukou deposit is the largest porphyry Mo deposit in NE China, with an average grade of 0.087% Mo. In this contribution, we present petrology, bulk geochemistry, zircon U–Pb geochronology and Lu–Hf isotopes, and apatite geochemistry for the Chalukou deposit. The intrusive rocks include pre‐mineralization monzogranite, syn‐mineralization quartz porphyry, fine‐grained porphyry and granite porphyry, and post‐mineralization monzogranite and feldspar porphyry. These granitoids are metaluminous to peraluminous, and belong to alkali‐calcic to calc‐alkalic series. Zircon εHf(t) values of granitoids range from +0.2 to +5.7 with corresponding Hf crustal model ages of 805–1170 Ma, indicating a Mesoproterozoic juvenile crustal source modified by mantle‐derived magma. They are characterized by logf(O2) of −16.1 to −9.4, with an average of −12.5, ΔFMQ of +0.8 to +7.9, with an average of +4.5, showing a relatively high oxidation state for the syn‐mineralization magma. The apatites in quartz porphyry have the highest F contents, ranging from 3.61 to 4.62 wt%. At Chalukou, F‐rich magma is conducive to the convection of magma and promotes the efficient separation of differentiation magma, making the magmatic‐hydrothermal fluid circulate many times, eventually resulting in the accumulation of ore‐forming materials on the top of the magma chamber and gradually aggravating mineral enrichment processes.

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