Behavior of REE and other trace and major elements during weathering of granitic rocks, Évora, Portugal

Geochemistry of Hydrothermal Alteration in Volcanic Rocks

“…(Sturchio et al, 1986;De Groot & Baker, 1992;Gouveia et al, 1993;van der Weijden & van der Weijden, 1995;Condie et al, 1995;Dill et al,1997Dill et al, , 2000Galán et al, 1998Galán et al, , 2007Pandarinath et al, 2008, among others). Terakado & Fujitani (1998) studied the REE and other trace elements in silicastones, alunites and related rocks in order to examine the behaviour of trace elements in the acidic hydrothermal alteration of silicic volcanic rocks.…”

Regularities of La distribution in humic psammozem profile of Transbaikalia and soil-root layer microzones of maize during the vegetation period

“…The accumulation of the ion-exchangeable, acid-and water-soluble La forms in the microzones of soil-root layer is significantly caused by organic matter secreted by roots into the environment, such as amino acids, aromatic and aliphatic acids, carbohydrates, styrols, enzymes, cell substances. The root secrets form the conditions in the soil under which destroy the mineral structure, change the content of compounds, increase the cation exchange capacity thus stimulating the transition of some amount into mobiles forms (Aide et al, 1999;Gouveia et al, 1993). It's necessary to note the contribution of the root suction force elements in the increase of mobile forms concentration.…”

“…In a humid climate top soils are depleted in REE compared to the parent material (Perelomov, 2007). It was found that the REE relocate from the upper acid horizons to the deeper horizons and deposit in the secondary minerals, Mn-and P-containing concretions (Gouveia et al, 1993;Aide et al, 1999;Perelomov, 2007). The behavior of lanthanides in soil depends on organic matter containing different negative charge groups sorbing REE cations.…”

Geochemistry of the sediment-hosted disseminated gold deposits in Southwestern Guizhou Province, China /

“…However, literature supporting REE mobility during hydrothermal processes has been rapidly expanding in the last two decades (Nesbitt, 1979;Alderton et al, 1980;Humpheris, 1984;Marsh, 1991;Bao, 1992;Williams-Jones and Wood, 1992;Gouveia et al, 1993;Mongelli, 1993;Prudencio et al, 1993 Van der Weijden andVan der Weijden, 1995).…”