scholarly journals Anomalous abundance and redistribution patterns of rare earth elements in soils of a mining area in Inner Mongolia, China

2016 ◽  
Vol 23 (11) ◽  
pp. 11330-11338 ◽  
Author(s):  
Lingqing Wang ◽  
Tao Liang
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Inner Mongolia ◽  
Mining Area

scholarly journals Trace and Rare Earth Elements, and Sr Isotopic Compositions of Fluorite from the Shihuiyao Rare Metal Deposit, Inner Mongolia: Implication for Its Origin

Minerals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 882
Author(s):  
Zhen-Peng Duan ◽  
Shao-Yong Jiang ◽  
Hui-Min Su ◽  
Xin-You Zhu ◽  
Tao Zou ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Inner Mongolia ◽  
Mining Area ◽  
Rare Metal ◽  
Type I ◽  
Type Ii ◽  
Type Iii ◽  
Hydrothermal Stage ◽  
Magmatic Stage

Abundant fluorites occur in the Shihuiyao rare metal (Nb-Ta-Rb) deposit in Inner Mongolia of NE China, and they can be classified by their occurrence into three types. Type I occurs disseminated in greisen pockets of albitized granite. Type II occurs in the skarn zone between granite and carbonate host rocks, and it can be subdivided into different subtypes according to color, namely dark purple (II-D), magenta (II-M), green (II-G), light purple (II-P), and white (II-W). Type III are the fluorite-bearing veins in the silty mudstones. On the basis of petrography of the fluorites and their high contents of HFSEs (high field strength elements) and LILEs (large ion lithophile elements), strong negative Eu anomalies, and tetrad effects, we suggest that Type I fluorites crystallized in a late-magmatic stage with all the components derived from the granite. The high Y/Ho ratios suggest that the Type II fluorites crystallized in the early- or late-hydrothermal stage. The rare earth elements (REEs) characterized by various Eu anomalies of the Type II fluorites indicate a mixed origin for ore-forming metals from granite-related fluids and limestones, and the oxygen fugacity increased during fluid migration and cooling. Compared to the Type II fluorites, the similar trace element contents of the Type III suggest a similar origin, and remarkable positive Eu anomalies represent a more oxidizing environment. The Sr isotopic composition (87Sr/86Sr)i = 0.710861) of the Type I fluorites may represent that of the granite-derived fluids, whereas the (87Sr/86Sr)i ratios of the Type II (0.710168–0.710380) and Type III (0.709018) fluorites are lower than that of the Type I fluorites but higher than those of the Late Permian-Early Triassic seawater, suggesting a binary mixed Sr source, i.e., granite-derived fluids and marine limestones. Nevertheless, the proportion of limestone-derived Sr in the mixture forming the Type III fluorites is much higher than that of Type II. The rare metal Nb and Ta get into the granite-derived F-rich fluids by complexing with F and precipitate in the form of columbite-group minerals after the Type I fluorites crystallize. Most of Nb and Ta may have deposited as columbite-group minerals during the magmatic stage, resulting in no Nb-Ta mineralization in the hydrothermal stage when the Type II and III fluorites formed. Hence, the Type I fluorites in the Shihuiyao mining area can be used as an important exploration tool for the Nb-Ta mineralization.

scholarly journals Erratum to: Assessing anthropogenic levels, speciation, and potential mobility of rare earth elements (REEs) in ex-tin mining area

2017 ◽  
Vol 24 (17) ◽  
pp. 15207-15207
Author(s):  
Aysha Masood Khan ◽  
Ismail Yusoff ◽  
Nor Kartini Abu Bakar ◽  
Ahmad Farid Abu Bakar ◽  
Yatimah Alias
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mining Area ◽  
Potential Mobility

Petrology, Mineralogy, and Chemistry of Size-Fractioned Fly Ash from the Jungar Power Plant, Inner Mongolia, China, with Emphasis on the Distribution of Rare Earth Elements

2014 ◽  
Vol 28 (2) ◽  
pp. 1502-1514 ◽  
Author(s):  
Shifeng Dai ◽  
Lei Zhao ◽  
James C. Hower ◽  
Michelle N. Johnston ◽  
Weijiao Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Fly Ash ◽  
Power Plant ◽  
Rare Earth Elements ◽  
Inner Mongolia

Study on the Concentrations and Fractionation of Rare Earth Elements in Filtered Water, Suspended Particles and Surface Sediments of the Upper Reaches of the Yellow River of China

2013 ◽  
Vol 448-453 ◽  
pp. 313-316
Author(s):  
Jing Jun Liu ◽  
Hao Yue Xiao ◽  
Ying Liu
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Inner Mongolia ◽  
Surface Sediments ◽  
Yellow River ◽  
Anthropogenic Activities ◽  
Suspended Particles ◽  
The Yellow River ◽  
High Concentration ◽  
High Concentrations

The concentrations and fractionation of 14 rare earth elements (REEs) such as La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in filtered water, suspended particles and surface sediments at 10 sampling sites from Gansu, Ningxia and Inner Mongolia sections of the Yellow River of China were studied by HR-ICP-MS. The results demonstrated that the total concentrations of REEs (REEs) in filtered water varied from 0.017 to 0.079 μg/L and had high concentration at S3 (0.079), S1 (0.070) and S4 (0.063) in Inner Mongolia section, while in suspended particles and surface sediments, the ranges were 148.9-246.8 mg/kg (mean 176.4) and 109.9-252.0 mg/kg (mean 179.9), respectively, and showed high concentration at S9 (246.8), S7 (252.0), S8 (229.8) in Baiyin (Gansu section) and S1 (209.5) in Baotou (Inner Mongolia section). The ratios of L/H, δEu and δCe in suspended particles and surface sediments implied light-REEs enrichment in the water compared with the background value of Chinese soil. And the chondrite-normalized REEs patterns of the suspended particles and surface sediments also showed light REEs enrichment at S1, S7, S8 and S9. The high concentrations of REEs in the Yellow River were probably due to the weathering of soil and anthropogenic activities near the river.

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