REE mobilization, fractionation and precipitation during weathering of basalts

Rare earth and trace element geochemistry of termite mounds in central and northeastern Namibia: Mechanisms for micro-nutrient accumulation

“…The LREE enrichment in PAAS and mounds except for sample MK2 corroborates the theory of LREE accumulation in clayey soils, enriched with alumina and ferric iron (e.g., Allègre and Rousseau, 1984;Taylor and McLennan, 1985;Cullers et al, 1987;Goldstein and Jacobsen, 1988;McLennan, 1989;Prudencio et al, 1993;Vital et al, 1999).…”

Mineral and geochemical characterization of a leptic aluandic soil and a thapto aluandic-ferralsol developed on trachytes in Mount Bambouto (Cameroon volcanic line)

“…The REEs/NASC normalized diagrams are relatively parallel in the TL profile (Fig. 6b), suggesting its lowest fractionation of the REEs compared to the TM profile (Prudencio et al, 1993). The general negative slopes in the TM profile (Fig.…”

Rare earth element patterns in a Chinese stalagmite controlled by sources and scavenging from karst groundwater

“…Mobilization of REY by dissolution and alteration of host minerals in sources under supergenic conditions may result in fractionation (Cullers et al, 1988;Boulange et al, 1990;Prudêncio et al, 1993;Guo et al, 2005). The 87 Sr/ 86 Sr ratios of SJ3 suggest that more than 60% of the Sr in SJ3, not including the top 6 mm of SJ3, was derived from the overlying soil layer (Zhou et al, 2009).…”