A synthesis of iron deposits in the eastern Tianshan, NW China

Zheng, Jianping

doi:10.1016/j.gsf.2019.11.014

Cited by 15 publications

(11 citation statements)

References 61 publications

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“…Implications for the regional Fe-Cu mineralization Regionally, there are many Fe and Fe-Cu deposits developed in the Aqishan-Yamansu belt, including the Hongyuntan, Bailingshan, Ma for the Fe mineralization from the Hongyuntan deposit. For the Bailingshan deposit, amphibole in the iron ore yielded a 40 Ar/ 39 Ar plateau age of 302.6 ± 2.4 Ma(Zheng, 2020), which is broadly similar to the U-Pb intercept age of hydrothermal titanite (306.6 ± 3.6 Ma; our unpublished data). Pyrite Re-Os dating of the Shuangfengshan and Shaquanzi deposits yielded ages of 294.5 ± 7.2 Ma and 295.2 ± 7.3 Ma, respectively…”

supporting

confidence: 69%

“…Our high-precision ages in the Duotoushan deposit coincide with the above hydrothermal Fe-Cu ore-forming events in the Aqishan-Yamansu belt (Figure 12). eralization is mainly coexisted with hydrous alteration (Hou et al, 2014;Jiang et al, 2018;Zhang, Chen, Peng, et al, 2018;Zheng, 2020). In comprehensive consideration of the above characteristics, we proposed that a large-scale Fe-Cu mineralization developed in the Aqishan-Yamansu metallogenic belt during the Late Carboniferous to Early Permian (ca.…”

Section: Constraints For Ore-forming Conditionsmentioning

confidence: 99%

“…Because of experienced a long period of oceanic plate subduction, accretionary orogen, and subsequent collisions during the Ordovician to Permian, the Eastern Tianshan is widespread hosted by Palaeozoic plutonic and volcaniclastic rocks (Mao et al, 2005; Safonova, 2017; Xiao & Santosh, 2014). Numerous porphyry Cu/Mo deposits, orogenic Au deposits, magmatic Cu‐Ni sulfide deposits, skarn‐type Pb‐Zn deposits, and magmatic‐hydrothermal related Fe–Cu deposits formed in this metallogenic province during the Late Palaeozoic (Han et al, 2014; Wang et al, 2014; Zhang et al, 2014; Zhang, Chen, Peng, et al, 2018; Zhao, Han, Lu, Liang, & Jourdan, 2020; Zheng, 2020). Three sets of nearly E‐W‐trending fault systems divided the region into four tectonic units, forming the Dananhu‐Tousuquan island arc belt, Kanggur shear zone, Aqishan‐Yamansu belt, and Central Tianshan Block from north to south (Figure 1; Mao et al, 2005; Xiao & Santosh, 2014).…”

Section: Regional Geologymentioning

confidence: 99%

“…Besides, titanite is an ideal geochronological tracer since it has a strong affinity for U and high closure temperatures for Pb diffusion (Cherniak, 1993; Kohn, 2017). In recent years, titanite U–Pb dating has been successfully used to date magmatic, metamorphic and hydrothermal events (Li et al, 2021; Morley & Arboit, 2019; Papapavlou et al, 2017; Scibiorski et al, 2019; Xiao et al, 2020; Zheng, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Using titanite to constrain geochronology and physicochemical conditions of hydrothermal mineralization events: A case study of the Duotoushan Fe–Cu deposit, Eastern Tianshan, NW China

Zhang

Chen

2022

Geological Journal

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As a common Ca‐ and Ti‐ bearing silicate mineral in many types of hydrothermal deposits, titanite usually contains high concentrations of trace elements. Its mineral chemistry and U–Pb isotope can reveal the physicochemical conditions and geochronology of the ore‐forming systems. In this contribution, we present a detailed study on titanite which precipitated during the Fe mineralization in the Duotoushan deposit. Due to coexistence with hydrothermal minerals, low Th/U ratios (0.02–0.3), and depletion in rare earth elements (REE), all the studied titanites are classified into a hydrothermal group. The negative correlation between [REE3+ + (Al, Fe)3+] and [Ca2+ + Ti4+] indicates that REE mainly entered the lattice of titanite via the mechanism of substitution. In addition, titanite grains are characterized by HREE, Zr, and Nb enrichments with LREE depletion, suggesting that the complexation of F− at neutral to alkaline pH conditions may have caused the fractionation of REE. At Duotoushan, the titanite grains coexist with quartz, epidote, amphibole, and magnetite, and exhibit positive Eu anomalies (δEu = 1.04–1.31) but lack Ce anomalies, indicating that ore‐forming fluids may have been derived from a relatively low oxygen fugacity and high fH2O environment. Titanite yielded an in‐situ U–Pb lower‐intercept age of 307.2 ± 4.8 Ma (MSWD = 0.97), consistent with the syn‐ore amphibole 40Ar‐39Ar plateau age (305 ± 6 Ma). Since the mineralization ages are obviously younger than country rocks, the previous syn‐sedimentary ore‐forming model for Duotoushan Fe–Cu mineralization can be excluded. Integrating the characteristics from ore deposit geology, periods of mineralization events, and spatial–temporal distribution of magmatism, we proposed that the Duotoushan Fe–Cu mineralization event may be linked with a hidden granite in its orefield.

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supporting

confidence: 69%

Section: Constraints For Ore-forming Conditionsmentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Using titanite to constrain geochronology and physicochemical conditions of hydrothermal mineralization events: A case study of the Duotoushan Fe–Cu deposit, Eastern Tianshan, NW China

Zhang

Chen

2022

Geological Journal

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“…The Altay Prefecture belongs to the polymetallic metallogenic belt, and deposits of Fe, Pb, Zn, Cu and other metals have been found in the region (Yu and Zheng 2019;Zheng 2020). Of the 118 discovered deposits in Xinjiang, Altay Prefecture accounts for 84 species, of which 49 species have proven reserves, accounting for 62.20 % of the proven deposits in Xinjiang.…”

Section: Study Areamentioning

confidence: 99%

Distribution of Potential Ecological Risks and Sensitivity in Altay Prefecture, Xinjiang, Northwest China

Meng

Zhao

et al. 2022

Preprint

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Restricted by factors such as regional climate and natural geographical location, the Altay Prefecture of Xinjiang has a very fragile ecological environment. As a strategic reserve area of non-ferrous metals in China, the mineral resources are very rich, while the Western Development Strategy and "Belt and Road" strategy would cause a certain degree of harm to the regional ecological environment. In order to assess the vulnerability of regional ecological environment, 41 soil sampling points were arranged in Altay Prefecture, and the spatial distribution map of heavy metals in soil was drawn. Among them, the content of Cu and Zn exceeded the soil background value most seriously, accounting for 28.73% and 19.37% respectively. The improved potential pollution risk index method was used to evaluate the risk of heavy metal pollution in the soil environment of Altay Prefecture. The results showed that the area of low risk areas in Altay Prefecture was the largest, accounting for 34.06%. The total area of high-risk and very high risk areas accounts for 24.98%, about 1/4 of the total area. Finally, based on multi-index factors such as topography, precipitation, soil type, soil media, vegetation types, lithology, geological disasters, heavy metal pollution, a comprehensive evaluation system of ecological environment sensitivity was constructed. The ecological environment sensitivity in Altay Prefecture was divided into four levels, and the proportion of each level area from high to low was: medium sensitive area (59.74%)＞low sensitive area (18.79%)＞high sensitive area (12.09%)＞extremely sensitive area (9.38%). Accurate assessment of the pollution risk of heavy metals and the vulnerability of ecological environment is crucial, which will provide scientific basis and theoretical support for the decision-making of relevant government agencies in Altay Prefecture.

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Carboniferous magmatic activity in the Aqishan–Caixiashan polymetallic ore cluster, eastern Tianshan, NW China: implications for tectonic evolution and regional metallogeny

Hu,

Wang,

Wei

et al. 2024

Int J Earth Sci (Geol Rundsch)

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A synthesis of iron deposits in the eastern Tianshan, NW China

Cited by 15 publications

References 61 publications

Using titanite to constrain geochronology and physicochemical conditions of hydrothermal mineralization events: A case study of the Duotoushan Fe–Cu deposit, Eastern Tianshan, NW China

Using titanite to constrain geochronology and physicochemical conditions of hydrothermal mineralization events: A case study of the Duotoushan Fe–Cu deposit, Eastern Tianshan, NW China

Distribution of Potential Ecological Risks and Sensitivity in Altay Prefecture, Xinjiang, Northwest China

Carboniferous magmatic activity in the Aqishan–Caixiashan polymetallic ore cluster, eastern Tianshan, NW China: implications for tectonic evolution and regional metallogeny

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