Experimental partitioning of high field strength and rare earth elements between clinopyroxene and garnet in andesitic to tonalitic systems

Petrogenesis of the Early Eocene adakitic rocks in the Napuri area, southern Lhasa: Partial melting of thickened lower crust during slab break-off and implications for crustal thickening in southern Tibet

“…Moreover, as D REE values increase with atomic numbers, garnet is the only rock-forming mineral that can substantially enhance both (La/Yb) N and (Dy/Yb) N (or (Gd/Yb) N ) of magmas (e.g., Klein et al, 2000). Thus, the positively correlated high (Dy/Yb) N and (La/Yb) N ratios (Fig.…”

Petrogenesis of the early Cretaceous Funiushan granites on the southern margin of the North China Craton: Implications for the Mesozoic geological evolution

“…In addition, they have low (La/Yb) N and Sr/Y ratio, suggesting that their parental magmas were generated under low pressures without garnet residual during the partial melting (e.g. Martin et al, 2005;Klein et al, 2000;Pertermann et al, 2004).…”

“…Data sources for partition coefficients are: Ds. for amphibole, from Xiong (2006) and Klein et al (1997); for clinopyroxene, from Klein et al (2000) and Barth et al (2002); for plagioclase, from Rollinson (1993). Representative calculations are listed for batch melting with residue as 70% amphibole + 10% clinopyroxene + 20% plagioclase(*).…”

Partitioning of Nb and Ta between rutile and felsic melt and the fractionation of Nb/Ta during partial melting of hydrous metabasalt

“…The low TiO 2 (1.2 wt%) and high TiO 2 (2.5 wt%) protoliths produce 0.1-0.58 wt% and 1.2-1.9 wt% rutile, respectively, during partial melting. D Nb and D Ta for garnet-felsic melt (D Nb = 0.04, D Ta = 0.08) and cpx-melt (D Nb = 0.005, D Ta = 0.014) from Klein et al (2000). Chondrite Nb/Ta = 19.9 from Mü nker et al (2003). fraction is lower than $20%, the Nb/Ta ratio increases rapidly with decreasing degree of melting due to increasing H 2 O content in the melt.…”