...) (Na2O C D + K2O CaO) vs. SiO2 (Frost et al., 2001); (C) K2O vs. SiO2 (Rollinson, 1993); and (D) A/NK [molar Al2O3/(Na2O + K2O)] vs. A/CNK [molar Al2O3/ (CaO + Na2O + K2O)] (Maniar and Piccoli, 1989). evaporation to dryness. The material was redissolved in 2 mL 1:1 HNO3 for 8 h at 120 °C. The analysis...

...), and Al2O3 versus SiO2 (Fig. 8D) point to the fractional crystallization of clinopyroxene, hornblende, and plagioclase. In addition, Hf is more compatible in hornblende than Zr, and the increasing Zr/Hf ratios therefore demonstrate the early hornblende fractionation prior to zircon saturation (Fig. 10J...

... at depth, prior to entrainment. The central 2 mm of the vein contains highly aluminous (up to 12.3 wt% Al2O3) and titaniferous (up to 6.2 wt% TiO2) pyroxene with correspondingly low silica (c. 39 wt% SiO2). These values suggest crystallization from an extremely silica-deficient melt. Where the hornblendite...

...-Rock Elemental Geochemistry The major and trace elemental concentrations of the two phases of granitoids in this study are listed in Tables S3 and S4. The ca. 2.5 Ga sanukitoids show relatively low SiO2 of 52.42 72.28 wt% (average 60.93 wt Al2O3 of 14.43 17.06 wt%, high K2O of 1.56 4.32 wt%, Na2O (3.03...

... and Orange Free State . PhD thesis, University of Cape Town , South Africa. Dalton J.A. Presnall D.C. 1998a . The continuum of primary carbonatite–kimberlite melt compositions in equilibrium with lherzolite: data from the system CaO–MgO–Al2O3–SiO2–CO2 at 6GPa . In Carbonatites...

...% for SiO2, <0.2 wt% for all other major oxides except K2O (<0.3 wt and <0.02 wt% for MnO2 and P2O5, while ALS reported analytical error <1.5 wt% for SiO2 and <0.2 wt% for all other major oxides except Al2O3 (<0.4 wt From both laboratories, analyses with unnormalized totals 96.0% and 103.0% were considered...

... to ferrocarbonate recycling Figure 6. (A) MgO versus SiO2, A B (B) CaO versus SiO2, (C) FeOT versus SiO2, (D) TiO2 versus SiO2, and (E) Al2O3 versus SiO2 plots for the Chagangnuoer fer- robasaltic and dacitic samples. The three modeling lines on each plot represent fractional crystallization trends calcu- lated...

... the partial melting of mantle wedge peridotites with input of 20% terrigenous sediments. The Norian diorites have moderate SiO2, relatively high MgO, Cr, and Ni contents, Mg# values of 63 65, high Sr, low Y and Yb contents, relevant high La/Yb ratios, and negligible Eu anomalies, which makes them comparable...

... 39.06 38.87 38.48 39.28 39.70 Cr 2 O 3 na 0.03 0.00 0.00 0.00 0.00 FeO tot 1.68 0.39 0.38 0.42 0.42 0.21 MnO 0.03 0.02 0.00 0.00 0.01 0.00 MgO 1.18 0.26 0.21 0.24 0.23 0.35 CaO 6.01 0.42 0.45 0.41 0.61 0.22 BaO na 0.25 0.19 0.25 0.10 0.02 Na...

.... – amorphous 2) products of experiments (mineral indices): Oxides – oxides with (w/) SiO2, TiO2, Al2O3, FeO, MgO, CaO, Na2O, K2O, S, Cl, Zn, Pb; chl –chlorite; Amf – amphibole; Ep – epidote; Pl – plagioclase; mt – magnetite; Py– pyrite; Sph – sphalerite; Pyr – pyrrhotite; Gln – galena; Spr – sperrylite...

... al. 1954 Cs 2 O Kim and Sanders 1991 
 Kracek 1930 
 Samsonov 1982 
 Charles 1966 BaO Seward et al. 1968a , b )
 Kracek 1930 
 Ol’shanskii 1951 ZrO 2 Ball et al. 1993 
 Butterman and Foster 1967 ZnO Bunting 1930 (a , c ) MnO 2 Singleton et al. 1962...