Ion-adsorption rare earth ores of China

2021 ◽  
pp. 63-68
Author(s):  
E. P. Bugrieva ◽  
A. V. Tarkhanov ◽  
Yu. M. Trubakov
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Layer Structure ◽  
Quantitative Estimation ◽  
Total Content ◽  
Lateritic Soil ◽  
Ion Adsorption ◽  
Material Constitution ◽  
Heavy Lanthanides ◽  
Weathered Layer

Geology and geochemistry of China’s ion-adsorption rare earth ores are discussed. The structure and material constitution of Lognan, Huashan, Guposhan and Heling deposits are compared. The weathered layer structure, as well as the distribution, differentiation and occurrence forms of rare earth elements (REE) in the weathered layer are described. The prospecting indicators and criteria of readily dissociated adsorbed REE ore are identified to find this type ores in the territory of Russia. The weathered layer enclosing ion-adsorption rare earth ore features specific differentiation of REE. General composition of such ores is governed by the composition of the primary rare earth mineralization in mother granites. If granites contain much yttrium and heavy lanthanides, then ion-adsorption rare earth ore contain also much yttrium and heavy lanthanides. Regarding differentiation of REE, yttrium and heavy lanthanides mainly concentrate in the middle, most clayey part of the weathered layer, while cerium accumulates in subsurface lateritic soil. The prime feature of ion-adsorption rare earth ore is the prevalence of readily dissociated REE, which can reach a quantity of 80% and more but not less than a half. The rest REE concentrate in relict rock-forming minerals and accessories. The quantitative estimation of adsorption form of REE is necessary for the geological and economic appraisal of a deposit. It is assumed that the quantity of readily soluble REE should be not less than 0.05–50% of the total content. Russia has many regions with such geotectonic environment. It is required to explore ion-adsorption rare earth ore occurrences in these regions.

scholarly journals Characteristic of rare-earth element distributions in mud volcanic waters

2019 ◽  
Vol 488 (1) ◽  
pp. 71-73 ◽  
Author(s):  
V. V. Ershov ◽  
E. V. Elovskiy ◽  
I. N. Puzich
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Rare Earth Element ◽  
Earth Element ◽  
Total Content ◽  
Element Content ◽  
Rare Earth Element Content ◽  
Mud Volcanoes ◽  
Taman Peninsula ◽  
Heavy Lanthanides

The original results on the distribution of rare-earth elements in the waters of mud volcanoes in Sakhalin Island, Taman Peninsula and Azerbaijan are presented. It has been shown that mud volcanic waters with total content of rare-earth elements less than 0.5 mcg/l are enriched with heavy lanthanides and characterized by a deficiency for Cerium. The Yuzhno-Sakhalinsk mud volcano demonstrates higher rare-earth element content in active griffons according to our study.

scholarly journals Geochemical signatures of rare earth elements and yttrium in the vicinity of an ion-adsorption type deposit: roles of source sediment control

2021 ◽  
Author(s):  
Haiyan Liu ◽  
Huaming Guo ◽  
Olivier Pourret ◽  
Maohan Liu ◽  
Zhen Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ion Adsorption ◽  
Sediment Control

scholarly journals A study of rare earth ion-adsorption clays: The speciation of rare earth elements on kaolinite at basic pH

2020 ◽  
pp. 105920
Author(s):  
Xu Feng ◽  
Oznur Onel ◽  
McAlister Council-Troche ◽  
Aaron Noble ◽  
Roe-Hoan Yoon ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ion Adsorption ◽  
Rare Earth Ion

scholarly journals Rare earth elements in soils of saline agrolandscapes of the Baraba plain

2021 ◽  
Vol 51 (3) ◽  
pp. 5-14
Author(s):  
N. V. Semendyaeva ◽  
A. A. Morozova ◽  
N. I. Dobrotvorskaya ◽  
N. V. Elizarov
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Soil Profile ◽  
Humus Content ◽  
Total Content ◽  
Agricultural Landscapes ◽  
Earth’S Crust ◽  
Depth Study ◽  
Earth's Crust ◽  
Humus Horizons

The total content of rare earth elements in the soil profile of saline agricultural landscapes catena of the Baraba plain within Novosibirsk region was studied. The total content of zirconium, yttrium, scandium, gallium, including lanthanides - cerium, lanthanum and ytterbium was determined. Rare earth elements are extremely poorly analyzed. At present, their influence on plants, organisms of animals and humans is being actively studied, although the maximum permissible and tentatively permissible concentrations for them have not yet been developed. The total content of rare earth elements, determined in the soils of the catena, depends on the granulometric composition and the degree of humus content of the soil horizons. It was revealed that in the studied soils they are mainly contained in the number of clarkes of the earth's crust, with the exception of lanthanum in the humus horizons, where its content is almost 1.5 times (44-48 mg/kg) higher than the clarke in the earth's crust (29 mg/kg), and ytterbium (10 times higher than the clarke). Along the soil profile, an insignificant movement of rare earth elements in both vertical and horizontal directions was noted, which indicates a low mobility of their compounds. Zirconium predominates in the profile of the studied soils from the group of rare earth elements. Its content in the humus horizons of soils of eluvial positions is within the clarke of the earth's crust; variations along the profile are insignificant. Ytterbium is contained in large quantities - from 1.89 to 4.05 mg/kg of soil, which is significantly higher than the clarke of the earth's crust (0.3 mg/kg of soil). The role of lanthanides in the soil -plant - animal - human system requires further in-depth study.

scholarly journals IDENTIFIKASI KEBERADAAN RARE EARTH ELEMENTS TIPE ION ADSORPTION PADA LEMPUNG: SAMPEL DARI MUNTOK DAN LUBUK BESAR, PULAU BANGKA

2021 ◽  
Vol 7 (2) ◽  
pp. 125
Author(s):  
Syafrizal Syafrizal ◽  
Arie Naftali Hawu Hede ◽  
Andy Yahya Al Hakim ◽  
Mutiara Indah Permatasari
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ion Adsorption
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