scholarly journals Geochemical characteristics of rare earth elements (REEs) in the paddy soil and rice (Oryza sativa L.) system of Kočani Field, Republic of Macedonia

Geoderma ◽  
2012 ◽  
Vol 183-184 ◽  
pp. 1-11 ◽  
Author(s):  
Nastja Rogan Šmuc ◽  
Tadej Dolenec ◽  
Todor Serafimovski ◽  
Matej Dolenec ◽  
Petra Vrhovnik
Keyword(s):  
Oryza Sativa ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Paddy Soil ◽  
Oryza Sativa L ◽  
Geochemical Characteristics ◽  
Republic Of Macedonia ◽  
L System ◽  
Kočani Field

Geochemical characteristics of rare earth elements in the surface sediments from the Spratly Islands of China

2017 ◽  
Vol 114 (2) ◽  
pp. 1103-1109 ◽  
Author(s):  
Jingxi Li ◽  
Chengjun Sun ◽  
Li Zheng ◽  
Xiaofei Yin ◽  
Junhui Chen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Surface Sediments ◽  
Geochemical Characteristics ◽  
Spratly Islands

Cadmium accumulation and bioavailability in paddy soil under different water regimes for different growth stages of rice (Oryza sativa L.)

2019 ◽  
Vol 440 (1-2) ◽  
pp. 327-339 ◽  
Author(s):  
Tao Tian ◽  
Hang Zhou ◽  
Jiaofeng Gu ◽  
Runyu Jia ◽  
Hongcheng Li ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Paddy Soil ◽  
Oryza Sativa L ◽  
Cadmium Accumulation ◽  
Growth Stages ◽  
Water Regimes ◽  
Different Growth Stages

The geochemical characteristics of aqueous rare-earth elements in shallow karst groundwater in Guiyang City, China

2011 ◽  
Vol 30 (1) ◽  
pp. 114-124 ◽  
Author(s):  
Shouyang He ◽  
Lijun Zhu ◽  
Ruidong Yang ◽  
Zheng Shen ◽  
Xiaohong Yu
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Geochemical Characteristics ◽  
Karst Groundwater ◽  
Guiyang City

Fractionation of rare-earth elements during magmatic differentiation and weathering of calc-alkaline granites in southern Myanmar

2016 ◽  
Vol 80 (1) ◽  
pp. 77-102 ◽  
Author(s):  
Kenzo Sanematsu ◽  
Terumi Ejima ◽  
Yoshiaki Kon ◽  
Takayuki Manaka ◽  
Khin Zaw ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Rare Earth Element ◽  
Earth Element ◽  
Geochemical Characteristics ◽  
Magmatic Differentiation ◽  
Calc Alkaline ◽  
Mineral Assemblages ◽  
Weathering Resistance

AbstractGeochemical characteristics and rare-earth element (REE)-bearing minerals of calc-alkaline granites in southern Myanmar were investigated to identify the minerals controlling fractionation between light and heavyREE(LREE and HREE) during magmatic differentiation and weathering. The granites were classified on the basis of the mineral assemblages into two contrasting groups: allanite-(Ce)- and/or titanite-bearing granites; and more HREE-enriched granites characterized by hydrothermal minerals including synchysite(Y), parisite-(Ce), bastnäsite-(Ce), xenotime-(Y), monazite-(Ce), Y-Ca silicate, waimirite-(Y) and fluorite. This suggests that allanite-(Ce) and titanite are not stable in differentiated magma and HREE are eventually preferentially incorporated into the hydrothermal minerals. The occurrence of theREE-bearing minerals is constrained by the degree of magmatic differentiation and the boundary of two contrasting granite groups is indicated by SiO2contents of ∼74 wt.% or Rb/Sr ratios of ∼3–8. Fractionation between LREE and HREE during weathering of the granites is influenced by weathering resistance of theREE-bearing minerals, i.e. allanite-(Ce), titanite, theREEfluorocarbonates and waimirite-(Y) are probably more susceptible to weathering, whereas zircon, monazite-(Ce) and xenotime-(Y) are resistant to weathering. Ion-exchangeableREEin weathered granites tend to be depleted in HREE relative to the whole-rock compositions, suggesting that HREE are more strongly adsorbed on weathering products or that HREE remain in residual minerals.

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