Formation mechanism of the lanthanide tetrad effect for a topaz- and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China

A topaz- and amazonite-bearing leucogranite pluton in eastern Xinjiang, NW China and its zoning

“…The increasing trend of the TE 1,3 value indicates progressively intensifying fluid influence up the pluton. Wu et al (2010) have made studies on REE features of individual minerals separated from all five zones of the pluton, and got the results that chondrite-normalized REE patterns of most constituent minerals of the pluton display clear convex tetrad effect similar to their host rocks, and the TE 1,3 values of these minerals also increased from zone-a to zone-d, except that a quartz sample from zone-b and zircon from zone-c exhibit concave tetrad effect. These results have lead them to conclude that REE tetrad features of the constituent minerals such as quartz, plagioclase, zircon, garnet and monazite, are inherited directly from the melt.…”

A cathodoluminescence-assisted LA-ICP-MS study of topaz from different geological settings

“…With respect to the trace element concentrations of topaz in other studies, Ti, V, Cr, Mn, Fe, Cu, Zn, Nb, LREE, HREE, Ta and W showed relevant variations (Leroy et al 2002, Wasim et al 2011, Wu et al 2011, Breiter et al 2013, Agangi et al 2014, 2016, Gauzzi et al 2018.…”

Lanthanide tetrad effect in limestone: a tool to environment analysis of the Ruteh Formation, NW Iran.

“…effect phenomenon are not very clear (Censi et al, 2007;Monecke et al, 2007;Inoue et al, 2009). But, based on recent investigations, some geochemicallybased models such as mineral phases during fractional mineralization, complexes in solutions, fluid-rock interaction, weathering, and hydrothermal alteration have been proposed by many researchers (Pan, 1997;Monecke et al, 2007;Badanina et al, 2010;Feng et al, 2011;Wu et al, 2011;Nardi et al, 2012;Abedini et al, 2017;Rezaei Azizi et al, 2017). Generally, during igneous activities such as fractional mineralization and interaction of rising hydrothermal fluids with rocks along the channelways (faults and/or fractures), and complexing with ligands in hydrothermal systems are distinguished by convex (M-shape) tetrad effect curves in normalized REE distribution patterns (McLennan, 1994;Irber, 1999;Monecke et al, 2007).…”