Origin of the tuff parting and associated enrichments of Zr, REY, redox-sensitive and other elements in the Early Miocene coal of the Siniy Utyes Basin, southwestern Primorye, Russia

Nechaev, Victor P.; Dai, Shifeng; Chekryzhov, I. Yu.; Tarasenko, Irina A.; Zinkov, A. V.; Moore, Tim A.

doi:10.1016/j.coal.2021.103913

Cited by 21 publications

(6 citation statements)

References 45 publications

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“…Radiometric dating of volcanogenic zircons in tonstein produces near-concordant ages (Bohor and Triplehorn, 1993;Spears, 2012;Nechaev et al, 2021). Zhang et al (2021) have used radiometric age determinations on zircons in five tonsteins (corresponding to the samples of DS3-1-T, DS6-1-T, DS6-2s-T, DS6-2z-T, and DS7-T) to determine the absolute ages of the Yan'an Formation in the Ordos Basin, which indicates the tonsteins are altered volcanic ash falls.…”

Section: Mineralogical Compositionsmentioning

confidence: 99%

“…In addition, the elevated concentrations of Co, Ni, Cu, and Sr in the studied tonsteins may be sourced by the acidic solutions (Fig. 13), which can also be responsible for leaching of Be, Rb, Cs, Th, U, Nb, Zr, Hf, and REY (Dai et al, 2017;Nechaev et al, 2021). The evidence of above elements released from the parent ash during the alteration process indicates that these elements are not only hosted in resistate minerals, such as zircon and phosphate minerals, but may be contained in volcanic glass or less (Winchester and Floyd, 1977).…”

Section: Leaching Of the Tonsteins Within Coal Seamsmentioning

confidence: 99%

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Mineralogical and geochemical characteristics of tonsteins from the Middle Jurassic Yan'an Formation, Ordos Basin, North China

Zhang

Wang

et al. 2022

International Journal of Coal Geology

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Section: Mineralogical Compositionsmentioning

confidence: 99%

Section: Leaching Of the Tonsteins Within Coal Seamsmentioning

confidence: 99%

Mineralogical and geochemical characteristics of tonsteins from the Middle Jurassic Yan'an Formation, Ordos Basin, North China

Zhang

Wang

et al. 2022

International Journal of Coal Geology

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“…In the process of coal formation, redox conditions also play an important role in the transformation of plant remains into humus and in the precipitation complexation and precipitation of trace elements in humus (Nechaev et al, 2022;Shi et al, 2022). The mercury content in Zhangji mine coal samples is distributed on the vertical cross section, the change trend of Ni/Co ratio is opposite, and similar to that of Mo content, showing a trend of decrease and then increase (Figure 7).…”

Section: Relationship Between Redox Conditions and Mercury Content Di...mentioning

confidence: 99%

Content and distribution of mercury in coal and its relation to depositional environment—A case study on coals from the Shanxi Formation in Huainan Coalfield

et al. 2023

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Mercury in coals might emit into the environment from coal combination, and finally cause environmental pollution. In this paper, 26 coal samples were selected from No. 1 which is coal in the Shanxi Formation of Zhangji and Xinjier mines in the Huainan coalfield. The mineralogical and geochemical components of coal samples were determined by DMA-80 mercury-measuring instrument, XRF, XRD, ICP-MS, and the relationship between the depositional environment of the coal seam and mercury enrichment was analyzed. The results show that the mercury content of coal in the study area ranged from 0.03 to 0.93 μg/g, with an arithmetic means of 0.21 μg/g, higher than the background values of coal in China and the world. The mercury content of Shanxi Formation coal varied among different mines, the arithmetic mean value of mercury in Zhangji coal mine and Xinjier mine coal is 0.35 μg/g and 0.12 μg/g respectively. Due to the complex depositional environment and depositional facies, the distribution of mercury content in the coal seam is quite different. XRD, Microscopic observation and the ratio of (CaO + MgO + Fe2O3)/(SiO2+ Al2O3) and Al2O3/TiO2 show that the main mineral in the depositional environment of this study area is kaolinite, quartz and pyrite, and the depositional facies are intercontinental and sea-land, so the parent rock type belongs to acid bedrock. The Ni/Co, Sr/Ba, and Sr/Cu ratios were used to indicate a weak oxidation-reduction, Marine salt water, and an arid and hot environment. The vertical distribution of mercury in coal and the characteristics of the depositional environment are combined to show that mercury in coal is easily affected by redox conditions, paleosalinity and paleoclimate in the depositional environment. At the same time, mercury accumulation is more easily in the depositional environment dominated by seawater intrusion than in the terrigenous input.

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“…Coal and coal-bearing strata have attracted much attention in recent decades [1][2][3][4] as promising alternative raw sources for rare earth elements (REEs), not only because the REE concentrations in many coals, coal-bearing strata, or coal ashes are equal to or higher than those found in conventional types of REE ores [5,6] but also because the worldwide demand for REEs in recent years has been greater than supply. Among REEs, europium (Eu) is classified as one of the most important critical rare earth elements [7][8][9] that has been widely industrially used.…”

Section: Introductionmentioning

confidence: 99%

Precise Determination of Eu Concentration in Coal and Sedimentary Rock Samples Using High-Resolution Inductively Coupled Plasma Mass Spectrometry (HR-ICP-MS)

Zhao,

Liu,

Jia

et al. 2023

Minerals

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Europium (Eu) in coal and sedimentary rocks has important mineral resource potential as well as being a crucial parameter in geochemical studies that can represent changes in the depositional environment during coal deposition and identify the depositional source region. Therefore, it is essential to realize the precise measurement of Eu in coal as this could be a useful parameter for paleoenvironmental reconstruction studies and the exploration of mineral resources. During inductively coupled plasma mass spectrometry (ICP-MS) analysis, polyatomic ions of Ba may interfere with Eu, causing the observed value to be higher than the actual value. This paper develops a new approach for Eu determination by using a high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS). The mass spectral interference and correction of Eu in the coal and sedimentary rock samples at low, medium, and high resolutions were investigated. The results showed that in the high-resolution mode (resolution = 10,000 amu), the interference of polyatomic ions of Ba could be distinguished from Eu; hence, Eu was determined under this circumstance. Under the optimal experimental circumstances, the detection limit was 0.006 μg/mL, the relative standard deviation was 0.80%–1.22%, and the linear correlation coefficient of the standard curve was over 0.9999. The recoveries of the 103Rh internal standard solution ranged from 94.41% to 100.10%. This method was verified using standard reference materials and selected samples, which demonstrated its high sensitivity, accuracy, and reliability, and a low detection limit, making it appropriate for detecting Eu in samples of coal and sedimentary rocks.

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Origin of the tuff parting and associated enrichments of Zr, REY, redox-sensitive and other elements in the Early Miocene coal of the Siniy Utyes Basin, southwestern Primorye, Russia

Cited by 21 publications

References 45 publications

Mineralogical and geochemical characteristics of tonsteins from the Middle Jurassic Yan'an Formation, Ordos Basin, North China

Mineralogical and geochemical characteristics of tonsteins from the Middle Jurassic Yan'an Formation, Ordos Basin, North China

Content and distribution of mercury in coal and its relation to depositional environment—A case study on coals from the Shanxi Formation in Huainan Coalfield

Precise Determination of Eu Concentration in Coal and Sedimentary Rock Samples Using High-Resolution Inductively Coupled Plasma Mass Spectrometry (HR-ICP-MS)

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