| Citation: |
Shao-qing Huang, Shu-zheng Ning, Jian-qiang Zhang, Li Zhang, Kang Liu, 2021. REE characteristics of the coal in the Erlian Basin, Inner Mongolia, China, and its economic value, China Geology, 4, 256-265. doi: 10.31035/cg2021001
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REE characteristics of the coal in the Erlian Basin, Inner Mongolia, China, and its economic value
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Abstract
The rare earth elements (REE) content of the coal in the Erlian Basin was determined by inductively coupled plasma mass spectrometry (ICP-MS), and it turns out that the REE content from different geological age shows a significant difference: The REE content of the coal in the Jurassic Alatanheli Group is from 152.05×10−6 to 1416.21×10−6, with an average value of 397.31×10−6, and the relative concentration factor shows enriched; the REE content of the coal in Early Cretaceous Baiyanhua Group is from 20.65×10−6 to 102.53×10−6, the mean value is 49.06×10−6, and the relative concentration factor shows normally. The REE distribution patterns samples in Jurassic and Cretaceous shows the difference: The REE pattern in Jurassic coal mainly manifests as H-type distribution, with the Y, Lu positive anomaly, it is speculated that the fluid carried REE ions into the coal-bearing basin, and the heavy REE gather in the coal due to the different chemical properties of each REE. The REE occurrence mode is presumed to be mainly organic. Flat type is the REE main distribution pattern in Cretaceous coal. The REE patterns in clastic rocks of the roof, parting and floor of coal seam are similar to the REE patterns in the coal and the most possible reason is that the REE main source is from the clastic rock. It showed that the coal of the Early Jurassic, especially of Amugulen coalfield has resource value.
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References
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Shao-qing Huang, Shu-zheng Ning, Jian-qiang Zhang, Li Zhang, Kang Liu, 2021. REE characteristics of the coal in the Erlian Basin, Inner Mongolia, China, and its economic value, China Geology, 4, 256-265. doi: 10.31035/cg2021001
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Figure 1.
Geological background of the Erlian Basin and sampling points distribution.
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Figure 2.
REE concentration coefficient of the coal in the Erlian Basin. a‒Cretaceous coal; b‒Jurassic coal.
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Figure 3.
REE distribution of the coal in the Erlian Basin. a‒REE distribution in the Early Cretaceous coal; b‒REE distribution in the Jurassic coal; c‒REE vertical distribution of the coal in the Baiyanhua No.2 Coalfield; d‒REE vertical distribution of the coal in Amugulen.
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Figure 4.
REE distribution patterns of coal-seam, roof, and floor in the Erlian Basin, China. a‒distribution patterns of the REE average value of the world’s coal, Jurassic coal, and Early Cretaceous coal in Erlian Basin; b‒REE distribution patterns of the coal in Amugulen; c‒REE distribution patterns of the Early Cretaceous coal; d‒REE distribution patterns of the coal, roof, and floor, dirt band in the Baiyinhua coalfield.
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Figure 5.
REE correlation parameter of the Amugulen coal in the Erlian Basin, China.