Trace elements in apatite from Gejiu Sn polymetallic district: Implications for petrogenesis, metallogenesis and exploration

Li, Jiang; Chen, Shouyu; Zhao, Yuehua

doi:10.1016/j.oregeorev.2022.104880

Cited by 12 publications

(5 citation statements)

References 62 publications

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“…Further, the increase in F in silicate melt can decrease the solidus temperature to as low as 450~550 • C (4~5 wt.% F) [69,70], which greatly prolongs the duration of magmatic fractionation. Compared with the western district granites (Figure 6c), the high F contents of micas from the eastern district granites and the widespread exposure of fluorite indicate that the eastern district granites are F-rich, which is consistent with the apatite study [71]. These are also consistent with petrographic and field observations, such as the fluorite inclusions in plagioclase and the coexistence of fluorite with cassiterite [12,17].…”

Section: Magma Fractionationsupporting

confidence: 86%

Comparison of Granites from the Eastern and Western Districts of the Gejiu Ore District in South China: Implication for Petrogenesis and Tin Metallogeny

Sun,

Zhang,

et al. 2023

Minerals

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Late Cretaceous granitoids are developed in the eastern and western districts of the Gejiu ore district, but tin deposits mainly occur in the eastern district, and the reasons for the difference in mineralization between the eastern and western districts are still controversial. Considering the main factors controlling granite Sn fertility, the whole-rock geochemical characteristics of granites on both sides are compared. LA-ICP-MS zircon U-Pb analyses of the Gejiu granites yielded two age periods: the early phase from 79.2 to 83.3 Ma and the later phase from 73.8 to 75.6 Ma. The western district granites have higher zircon εHf(t), CaO/Na2O, Ba, and Sr concentrations and lower Rb/Sr ratios than the eastern district granites, indicating that the western district granites have more mantle-derived materials in the source than the eastern district granites. Results of oxygen fugacity show that the western granites have a higher oxygen fugacity condition. More depleted Ba, Sr, P, Eu and Ti characteristics with obviously negative Eu anomalies in the eastern granites also have high Rb/Sr ratios and low Nb/Ta and Zr/Hf ratios, indicating that the eastern granites experienced highly magmatic differentiation, attributed to high volatile F contents that can reduce the viscosity and solidus of magma. Combined with the differences in field observations and structural styles, on the whole, the western district granites have higher oxygen fugacities and lower F contents and magmatic differentiation than those in the eastern district granites, indicating that the western district granites are not conducive to mineralization.

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Section: Magma Fractionationsupporting

confidence: 86%

Comparison of Granites from the Eastern and Western Districts of the Gejiu Ore District in South China: Implication for Petrogenesis and Tin Metallogeny

Sun,

Zhang,

et al. 2023

Minerals

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“…To answer these five questions, a large number of geophysical and geochemical studies related to the Laochang Pb-Zn deposit were conducted (Liao et al, 2014;Guo et al, 2018;Cheng et al, 2019;Zhao et al, 2019;Zhang et al, 2020;Xu et al, 2021;Xu et al, 2022a;Xu et al, 2022b;He et al, 2022;Li et al, 2022;Zhao, 2022;Zhao et al, 2022;Li et al, 2023). Based on the review of these geophysical and geochemical investigations, the above five questions can be answered as follows: 1) Through considering the data of geology, geophysics, geochemistry and remote sensing image interpretation, it is believed that there may be a Yanshanian granite body below the Laochang Pb-Zn deposit.…”

Section: Basic Questions Associated With Establishing Computational M...mentioning

confidence: 99%

Computationally simulating the hydrothermal mineralizing system involved in the Laochang Pb-Zn deposit, Gejiu ore district, Yunnan, China: an example of pore-fluid convection controlled mineralization

Liu,

Zhao

2024

Front. Earth Sci.

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The Laochang Pb-Zn deposit can be typically considered as a hydrothermal mineralizing deposit in the Gejiu ore district. Although extensive studies were conducted to understand the mineralizing system associated with the Laochang Pb-Zn deposit through using the traditional geoscience methods, the mineralizing process involved in this deposit has not been justified in a strictly scientific manner to date. In this article, the hydrothermal mineralizing mechanism of the Laochang Pb-Zn deposit is computationally simulated through using the dual length-scale approach associated with the finite element method (FEM). The related computationally simulating outcomes have revealed the following understanding: 1) the pore-fluid convection provides a continuous source of mineralizing fluid and material for the Laochang Pb-Zn deposit; 2) the convective flow of pore-fluid is the primary dynamic mechanism, which controls the temperature, chemical species and pore-fluid velocity distributions in the Laochang Pb-Zn deposit; 3) the localized structure plays a key role in controlling the localized pore-fluid flow pattern, which can further control the location and grade of the orebody in the Laochang Pb-Zn deposit; 4) the dual length-scale approach associated with the FEM is very useful for dealing with the computational simulation of the hydrothermal mineralizing mechanism involved in the Laochang Pb-Zn deposit.

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“…Li concentrations in natural minerals (plagioclase, quartz, sanidine, pyroxene, amphibole, apatite, titanite, zircon) grown from rhyolitic and granitic melts are typically less than 50 ppm (Berlo et al, 2004;Bachmann et al, 2005;Kent et al, 2007;Cabato et al, 2013;Forni et al, 2016, Forni et al, 2018Rubin et al, 2017;Duan and Jiang, 2018;Ellis et al, 2018;Neukampf et al, 2019;Neukampf et al, 2022;Neukampf et al, 2023;Friedrich et al, 2020;Li et al, 2022). Yet, Li concentrations up to 120 ppm can be found in biotites and zircons from rhyolitic magmas (Forni et al, 2016;Forni et al, 2018;Ellis et al, 2022a), which then represent the Li-richest minerals in felsic volcanic rocks.…”

Section: Mineral Concentrationsmentioning

confidence: 99%

Lithium in felsic magmas: a volcanological perspective

Dupont de Dinechin,

Balcone-Boissard,

Martel

et al. 2023

Front. Earth Sci.

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Volcanic eruptions are unpredictable phenomena that pose a challenge to crisis management, owing to the fact that contrasted eruptive styles (explosive versus effusive) exhibited at the surface depend on unobservable deep processes occurring in the reservoir and the volcanic conduit. Constricting the behaviour of magma during ascent, and the degassing in particular, allows for a clearer understanding of the relationships between petrological and volcano monitoring signals, and hence a better description of the volcanic hazard. To this aim, lithium (Li) has been used to track magmatic and post-eruptive processes, as a geospeedometer for processes operating on short time scales due to its high mobility in silicate melts and crystals. Yet, the accurate use of Li to assess syn- and post-eruptive processes still lack complete dataset. We propose a review of our current knowledge on Li behavior, with an emphasis on felsic (andesitic to rhyolitic) magmas whose explosive behavior during volcanic eruptions is still poorly understood. We present current knowledge regarding the Li concentration and isotopic compositions, intracrystalline diffusion, and crystal-melt-fluid partition coefficients discovered in felsic magmas and primary crystals. We describe difficulties in interpreting Li data to investigate the differentiation, degassing, ascent rate, volatile fluxing, and cooling of magmas. Finally, we suggest future directions for expanding our understanding of Li behavior.

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Trace elements in apatite from Gejiu Sn polymetallic district: Implications for petrogenesis, metallogenesis and exploration

Cited by 12 publications

References 62 publications

Comparison of Granites from the Eastern and Western Districts of the Gejiu Ore District in South China: Implication for Petrogenesis and Tin Metallogeny

Comparison of Granites from the Eastern and Western Districts of the Gejiu Ore District in South China: Implication for Petrogenesis and Tin Metallogeny

Computationally simulating the hydrothermal mineralizing system involved in the Laochang Pb-Zn deposit, Gejiu ore district, Yunnan, China: an example of pore-fluid convection controlled mineralization

Lithium in felsic magmas: a volcanological perspective

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