Critical element (Nb-Ta-Zr-Hf-REE-Ga-Th-U) mineralization in Late Triassic coals from the Gaosheng Mine, Sichuan Basin, southwestern China: Coupled effects of products of sediment-source-region erosion and acidic water infiltration

Zhou, Mingxuan; Dai, Shifeng; Wang, Xibo; Zhao, Laishi; Nechaev, Victor P.; French, David; Graham, Ian T.; Zheng, Jintian; Wang, Yan; Dong, Mengjun

doi:10.1016/j.coal.2022.104101

Cited by 18 publications

(3 citation statements)

References 134 publications

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“…Coals influenced by mafic volcanic ash input or by the input of detrital materials from mafic rocks in sediment-source regions are generally rich in transition elements or metals (e.g., V, Cr, Co, and Ni). − Zhao et al calculated the Al 2 O 3 /TiO 2 ratios of samples from the Datanhao mine and found that a small number of samples are located in the mafic field, which likely explains the association of Co with Ni, and V with Cr in Figure .…”

Section: Results and Discussionmentioning

confidence: 99%

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Xu,

Li,

Zhu

et al. 2023

ACS Omega

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Modes of occurrence of elements in coal are important because they can be used not only to understand the origin of inorganic components in coal but also to determine the impact on the environment and human health and the deposition process of coal seams as well. Statistical analysis is one of the commonly used indirect methods used to analyze the modes of occurrence of elements in coal, among which hierarchical clustering is widely used. However, hierarchical clustering may lead to misleading results due to its limitation that it focuses on the clusters of elements rather than a single element. To tackle this issue, we use the first part of a well-known Bayesian network structure learning algorithm, i.e., Peter−Clark (PC) algorithm, to explore the relationships of the coal elemental data and then infer modes of occurrence of elements in coal. A data set containing 95 Late Paleozoic coal samples from the Datanhao and Adaohai mines in Inner Mongolia, China, is used for the performance evaluation. Analytical results show that many instructive and surprising insights can be concluded from the first part of the PC algorithm. Compared with the hierarchical clustering algorithm, the first part of the PC algorithm demonstrates superiority in analyzing the modes of occurrence of elements in coal.

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Section: Results and Discussionmentioning

confidence: 99%

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Xu,

Li,

Zhu

et al. 2023

ACS Omega

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“…Due to its high sensitivity, low detection limit, and broad linear range, inductively coupled plasma mass spectrometry (ICP-MS) has become one of the most competitive and promising methods for trace and ultratrace REE analysis in geological materials [7,[23][24][25] and is widely used in trace element testing compared to other analytical techniques like neutron activation analysis [26][27][28][29][30], X-ray fluorescence spectrometry [31][32][33], laser-induced breakdown spectrometry [34][35][36][37], atomic absorption spectroscopy [38][39][40][41], and inductively coupled plasma atomic emission spectrometry [42][43][44][45]. There have been many reports of concentrations of trace elements in coals that were successfully determined by ICP-MS [46][47][48][49][50][51][52]. However, the determination of Eu by ICP-MS is often interfered with due to the overlapping of M + , MO + , and MOH + ions [53][54][55], especially the polyatomic ions BaO and BaOH formed by Ba [20,22,56,57].…”

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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“…Coal-hosted critical metal elements are an important direction in the study of coal geology and mineral deposits. In recent years, researchers from the United States [7,8], Europe [9][10][11], Russia [12,13], South Africa [14] and China [15][16][17][18] have all conducted research in this field and achieved a set of high-level research results. The Qinshui coalfield is an important lean coal and anthracite base in Shanxi Province, and it is also one of the most important areas for coalbed methane exploration and exploitation.…”

Section: Introductionmentioning

confidence: 99%

Geochemical Characteristics of Critical Metal Elements in the No. 9 Coal Seam from the Xinyuan Mine, Northern Qinshui Coalfield, Shanxi Province, China

Zhang

Wang

et al. 2023

Minerals

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As one of the main fossil fuels globally, coal can be enriched with a variety of critical metal elements in specific geological conditions. This paper investigates the mineral compositions and concentrations of major and minor element oxides and trace elements in the No. 9 coal from the Xinyuan mine of the northern Qinshui coalfield, China, and discusses the modes of occurrence and enrichment mechanisms of critical metal elements such as Li, Ga, Th and REY. The mineral compositions of the No. 9 coal are primarily represented by clay minerals and quartz, with a small amount of calcite, siderite, anatase, etc. The major element oxides in the No. 9 coal are dominated by SiO2 and Al2O3. Compared with world hard coal, the No. 9 coal of the Xinyuan mine is rich in Li (CC = 8.00) and Th, slightly enriched with Pb, Sc, Ga, Y, La, Ce, Tb, Dy, Er, Yb and Hg, and depleted in Mn, Co, Ni, Rb, Cs and Tl. The critical metal elements such as Li, Ga, Th and REY that enriched No. 9 coal mainly occur in aluminum silicates. The genetic type of the critical metal elements in the No. 9 coal from the Xinyuan mine is source rock-controlled type. The critical metal minerals and solutions from the source area were transported to the study area by the action of water. Due to the change of swamp water conditions, the critical metal elements were combined with clay minerals and enriched the coal.

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Critical element (Nb-Ta-Zr-Hf-REE-Ga-Th-U) mineralization in Late Triassic coals from the Gaosheng Mine, Sichuan Basin, southwestern China: Coupled effects of products of sediment-source-region erosion and acidic water infiltration

Cited by 18 publications

References 134 publications

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

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

Geochemical Characteristics of Critical Metal Elements in the No. 9 Coal Seam from the Xinyuan Mine, Northern Qinshui Coalfield, Shanxi Province, China

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