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首页> 外文期刊>Energy & fuels >Geochemical Characteristics of Rare-Metal, Rare-Scattered, and Rare-Earth Elements and Minerals in the Late Permian Coals from the Moxinpo Mine, Chongqing, China
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Geochemical Characteristics of Rare-Metal, Rare-Scattered, and Rare-Earth Elements and Minerals in the Late Permian Coals from the Moxinpo Mine, Chongqing, China

机译：重庆墨新坡矿区晚二叠世煤中稀土，稀土，稀土元素和矿物的地球化学特征

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摘要

The rare-metal, rare-scattered (dispersed), and rare-earth elements (TREs) and minerals of the K2 coal from the Moxinpo mine, Chongqing, were analyzed using inductively coupled plasma mass spectrometry and scanning electron microscopy (SEM) with energy-dispersive X-ray spectrometry, respectively. In addition, three-fold geochemical classification of TREs (Li-Be-Rb(Cs)-Sr-Ge-Se-Tl, Zr(HO-Nb(Ta)-Ga(In)-Te-Re-Cd, and REY-Sc) was used to determine the vertical distribution. Compared to world bituminous coals, the K2 coal is enriched in Li, Be, Zr, Nb, Hf, Ta, Ga, Se, Cd, In, Te, Re, Sc, and REY elements (except Eu and Tm), especially in Zr, Nb, Ta, Se, Re, and Sc (5 times). Compared with the upper continental crust, the K2 coal is enriched with REY, and the fractionation of individual light-REY is higher than that of heavy-REY except for few cases. The value of delta Eu showed a well-pronounced negative anomaly and that of delta Ce showed a slightly negative anomaly, which indicate that the K2 coal-seam was intermittently affected by seawater. Minerals in the K2 coal are mainly represented by kaolinite, pyrite, and quartz, while rutile, bastnasite, and xenotime were observed under SEM. The migration, enrichment, and occurrence of TREs in coal are determined by many factors, such as terrigenous rocks, coal-forming microfacies, and paleo vegetation. The correlation analysis showed that rare-metal and rare-earth elements in K2 coal mainly occur in aluminosilicate minerals due to their high correlation coefficients with SiO2 and Al2O3; traces of rare-earth elements mainly occur in bastnasite and xenotime; and rare-scattered elements (Ge, Se, Cd, In, and Te) are hosted in sulfide minerals (pyrite).
机译：利用电感耦合等离子体质谱和扫描电子显微镜（SEM）对重庆墨新坡矿区K2煤的稀有金属，稀有（分散）和稀土元素（TRE）和矿物进行了分析。 -分散X射线光谱法。此外，TREs（Li-Be-Rb（Cs）-Sr-Ge-Se-Tl，Zr（HO-Nb（Ta）-Ga（In）-Te-Re-Cd和REY）的三重地球化学分类-Sc）来确定垂直分布。与世界烟煤相比，K2煤富含Li，Be，Zr，Nb，Hf，Ta，Ga，Se，Cd，In，Te，Re，Sc和REY元素（Eu和Tm除外），尤其是Zr，Nb，Ta，Se，Re和Sc中的元素（> 5倍），与上地壳相比，K2煤富含REY，并且各个轻度的分馏-REY除少数情况外均高于重型REY，δEu值表现出明显的负异常，δCe值表现出轻微的负异常，表明K2煤层受到间歇性影响。 K2煤中的矿物质主要以高岭石，黄铁矿和石英为代表，而在SEM上观察到金红石，贝纳石和氙矿的存在，TRE在煤中的迁移，富集和发生是由许多因素决定的，例如的陆相岩石，成煤的微相和古植被。相关分析表明，K2煤中的稀土金属和稀土元素主要存在于铝硅酸盐矿物中，这是由于它们与SiO2和Al2O3的相关系数较高。痕量的稀土元素主要存在于镁橄榄石和异种生物中。稀有元素（Ge，Se，Cd，In和Te）位于硫化物矿物（黄铁矿）中。

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  • 来源
    《Energy & fuels》 |2018年第3期|3138-3151|共14页
  • 作者

    Qin Shenjun; Gao Kang; Sun Yuzhuang; Wang Jinxi; Zhao Cunliang; Li Shenyong; Lu Qngfeng;

  • 作者单位

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

    Hebei Univ Engn, Key Lab Resource Explorat Res Hebei Prov, Handan 056038, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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