Review of the Himalayan leucogranites: comparison between the North and South belts, from geochemistry, petrogenesis, and rare-metal mineralization

Zhang, Shuhao

doi:10.1080/00206814.2023.2245847

Cited by 3 publications

(4 citation statements)

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“…Contour maps of RHP average (a) and peak (b) values of the Late Mesozoic Luanchuan plutons from this study and previous studies. Published geochemical data sources: Bao et al (2014), Guo et al (2020), Han et al (2015), He (2015), Li et al (2012), Meng et al (2012), Qi (2014), Qian et al (2022), Tang et al (2021), Wang et al (2019), Xue (2017), Xue et al (2018), Yang, Wang, et al (2012), Yang, Li, and Chen (2012) Yang et al (2019), Zhang (2014), Zhang (2015), Zhang, Cao, et al (2018). …”

Section: Resultsmentioning

confidence: 99%

“…The Luanchuan region, located in the northeastern domain of the East Qinling Orogen (Figure 1b), is composed of the Xiong'er, Guandaokou, Kuanping, Luanchuan and Taowan Groups (Figure 1c) (Xue et al, 2018; Yan, 2004; Zhang, 2014). The major faults in the Luanchuan region consist mainly of the Miaozi and Luanchuan faults as well as their NE‐ and NW‐trending branches (Xue et al, 2018; Yang, Zhang, et al, 2009; Zhang, 2014), which are correlated with intercontinental collision (Dong et al, 2011; Wu & Zheng, 2013; Zhang, 2015). Two major ore fields in the Luanchuan ore district are the Nannihu and Yuku ore fields (Xue et al, 2018; Yang et al, 2019, 2020; Zhang, Cao, et al, 2018), which show close genetic links with the Late Jurassic to Early Cretaceous granitic plutons (Han et al, 2015; Yang et al, 2019; Yang, Mao, et al, 2022; Zhang, 2014).…”

Section: Geological Settingmentioning

confidence: 99%

“…The intrusive rocks in the Luanchuan region formed during two periods: the Proterozoic metagabbro and syenite porphyry, and the Late Jurassic‐Early Cretaceous (Yanshanian) granite, in which the Late Mesozoic granitic plutons are closely correlated with the formation of polymetallic deposits (Xue et al, 2018; Yan, 2004; Zhang, 2014). The Late Jurassic to Early Cretaceous granitic plutons consist mainly of Nannihu, Shangfang, Huangbeiling, Yuku, Shibaogou, and Daping plutons (Qian et al, 2022; Wang et al, 2019; Xue et al, 2018; Yang et al, 2019; Zhang, 2014; Zhang, 2015), whereas the Middle Cretaceous granitic pluton is represented by the Laojunshan pluton (Li et al, 2012; Meng et al, 2012; Qi, 2014; Tang et al, 2021). Most of these Late Mesozoic granitoids are identified as high‐K calc‐alkaline to shoshonite series, characterized by enrichment in light rare earth elements (LREEs) and depletion in heavy rare earth elements (HREEs) (Yang et al, 2019).…”

Section: Geological Settingmentioning

confidence: 99%

“…The 238 U, 235 U, 232 Th and 40 K are natural radionuclides, with the half‐life of 4.468 × 10 9 ( 238 U), 7.038 × 10 8 ( 235 U), 1.41 × 10 10 ( 232 Th), and 1.28 × 10 9 ( 40 K), radioactive heat production mainly results from their decay process (Lu et al, 1981; Ruedas, 2017). During the high degree of crystallization differentiation, the U, Th and K are enriched in granitic magma, with high heat production (Zhang, 2015; Zhang et al, 2007; Zhou et al, 2020). The radioactive heat production rate (RHP) usually refers to the radiogenic heat produced by radioactive decay per unit volume of rock (Rybach & Buntebarth, 1982).…”

Section: Introductionmentioning

confidence: 99%

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High heat production of the Late Mesozoic Luanchuan granites from East Qinling Orogen, China: Implications for petrogenesis and mineral exploration

et al. 2023

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Some of the high heat production granites in the continental crust have been suggested to be linked with I‐, A‐, and partly S‐type granitoids which aided in the formation of associated polymetallic deposits. Here, we investigate the Shibaogou and Laojunshan plutons in the Luanchuan region, East Qinling Orogen, China, and integrate these with published geochemical information to compute the rate of heat production per unit rock mass (RHP value, unit μW/m3). In addition, we also present RHP contour maps of all the Late Mesozoic granitic plutons in the Luanchuan region, with a view to evaluate the link among the high heat production granites, their petrogenesis and mineralization. The RHP values of granitoids in the Luanchuan region vary from 1.7 to 14.44, with the Nannihu pluton showing the highest RHP peak value of 6.04, whereas the Huoshenmiao pluton has the lowest RHP peak value of 2.59. The RHP values have a positive correlation with the degree of magma differentiation, as suggested that the Nannihu pluton is a highly fractionated I‐type granite and the Huoshenmiao pluton is a quartz diorite. This is also consistent with U, Th and K which are incompatible elements that tend to enter the melt during magma evolution. Furthermore, the higher RHP value intrusions (e.g., Nannihu, Daping) show close genetic links with high economic deposits, whilst the plutons with lower RHP values are generally related to small ore deposits. We envisage that the high heat production granites underwent protracted cooling process, which promote the convection and circulation of hydrothermal fluids, so that ore‐forming materials (e.g., Mo, W) can sufficiently accumulate and precipitate as economic mineralization. This also indicates that these granitoids with relatively higher RHP values have a greater metallogenic potential. The RHP contour mapping results show high RHP value domains ranging from 2.68 to 4.82 in the southeast and northeast segments of the Shibaogou pluton, whereas the RHP values of other regions in this pluton vary from 2.14 to 2.68. In contrast, the high RHP value regions mostly occur within the western and eastern parts of the Laojunshan pluton, and range from 4.91 to 6.21. Other regions in the Laojunshan pluton have low RHP values in the range of 2.69–4.91. A few Mo‐W deposits are mostly hosted in the southeastern part of the Shibaogou pluton, implying that these regions with high RHP values might have higher metallogenic potential. The contour mapping of RHP maximum, minimum, average and peak values of all the Mesozoic granitic plutons in the Luanchuan region also show high value zones within and/or at peripheral regions of the Nannihu ore fields and these segments between the Nannihu and Yuku ore fields, which suggest that these zones likely have high potential for Mo‐W exploration.

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