Rare Earth Element Concentrations, Speciation, and Fractionation along Groundwater Flow Paths: The Carrizo Sand (Texas) and Upper Floridan Aquifers

2005 ◽  
pp. 223-251 ◽  
Author(s):  
Jianwu Tang ◽  
Karen H. Johannesson
Keyword(s):  
Rare Earth ◽  
Groundwater Flow ◽  
Rare Earth Element ◽  
Earth Element ◽  
Flow Paths ◽  
Element Concentrations

Spatial variations in dissolved rare earth element concentrations in the East China Sea water column

2018 ◽  
Vol 205 ◽  
pp. 1-15 ◽  
Author(s):  
Le Duc Luong ◽  
Ryuichi Shinjo ◽  
Nguyen Hoang ◽  
Renat B. Shakirov ◽  
Nadezhda Syrbu
Keyword(s):  
Rare Earth ◽  
Water Column ◽  
East China Sea ◽  
Rare Earth Element ◽  
Earth Element ◽  
Sea Water ◽  
Spatial Variations ◽  
East China ◽  
The East China Sea ◽  
Element Concentrations

Rare earth element concentrations for the Mobile-Alabama River systems

2007 ◽  
pp. 195-207
Author(s):  
E. Y. Graham ◽  
W. B. Lyons ◽  
K. A. Welch ◽  
T. Jones ◽  
J. C. Bonzongo
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
River Systems ◽  
Element Concentrations

Evaluation of several phosphate amendments on rare earth element concentrations in rice plant and soil solution by X-ray diffraction

Chemosphere ◽  
2019 ◽  
Vol 236 ◽  
pp. 124322 ◽  
Author(s):  
Shulan Jin ◽  
Zhongjun Hu ◽  
Yizong Huang ◽  
Ying Hu ◽  
Huahua Pan
Keyword(s):  
Rare Earth ◽  
Soil Solution ◽  
Rare Earth Element ◽  
Rice Plant ◽  
Earth Element ◽  
X Ray Diffraction ◽  
X Ray ◽  
Element Concentrations

scholarly journals Petrogenesis of Heavy Rare Earth Element Enriched Rhyolite: Source and Magmatic Evolution of the Round Top Laccolith, Trans-Pecos, Texas

Minerals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 423 ◽  
Author(s):  
Brent Elliott
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Geochemical Evolution ◽  
Magmatic Differentiation ◽  
Magmatic System ◽  
Heavy Rare Earth ◽  
Heavy Rare Earth Element ◽  
Element Concentrations ◽  
Stage Crystallization

The Round Top rhyolite located in Trans-Pecos Texas is enriched in Be, F, Li, Nb, Rb, Sn, Th, U, Y, Zr, and rare earth elements (REEs). REE-bearing minerals are mainly ubiquitous nano-scale accessory phases throughout the groundmass, incorporated in synchysite-group minerals, xenotime-(Y), Y- and Ce-rich fluorite, and zircon. The rhyolite is peraluminous, high-silica, alkaline (not peralkaline), with elevated heavy rare earth element concentrations and anonymously negative Eu values. Pervasive spongy groundmass and recrystallization textures are consistent with the elevated and remobilized Zr, Th, and Y + HREE (heavy rare earth element) concentrations and a high field strength element (HFSE) soluble, sub-alkalic, F-rich, magmatic system. REE-bearing minerals are present as late-magmatic, interstitial phases and attributed with closed-system, post-magmatic, hydrothermal alteration. Petrogenetic modeling provides scenarios that explain the geochemical evolution and REE complexing behavior in evolved rhyolite magmas, and determines possible source compositions and evolution. Trace element models suggest a system typical of having extensive magmatic differentiation. The resulting rhyolite magma is indicative of a silica-rich magmatic system enriched in H2O, Li, and/or F that could be considered transitional between pure silicate melt and hydrothermal fluid, where fluorine-ligand complexing was prevalent through late magmatic cooling and crystallization processes. Thorough differentiation and high fluorine activity contributed to the late stage crystallization of REE-bearing minerals in the Round Top rhyolite.

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