... following the DZ/T0223- 2001 standard. Accuracy of the analyses was within 1% for the major elements (SiO2, Al2O3, FeO, CaO, MgO, K2O, and Na2O), within 3% for Fe2O3, P2O5, TiO2, and MnO, within 5% for the trace elements and REEs with contents >10 ppm, and within 10% for elements with contents <10 ppm...

... rocks. (A) Na2O + K2O versus SiO2 (total alkali-silica) diagram after Middlemost C D (1994); (B) K2O versus SiO2 diagram after Pecerillo and Taylor (1976); (C) A/NK ver- sus A/CNK diagram [A/NK, molar Al2O3/(Na2O + K2O); A/CNK, molar Al2O3/ (Na2O + K2O + CaO (D) FeOT/(FeOT + MgO) versus SiO2 diagram...

... was performed in the 10-component 222 NCKFMASHTO (Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2-O2) compositional 223 system. MnO was ignored in the model because of its low concentrations (<0.3 wt The 224 following studies describe the activity models selected to define the mineral compositions in 225 Perple_X...

... in the profile diVer from end member schorl as they are relatively more enriched in Al2O3 and SiO2 and depleted in MnO, FeOtot, CaO, Na2O and TiO2, consistent with the diVerence between the fresh and altered rocks (Ferguson 1992). The apparently anomalous TiO2 may be expected as, during biotite breakdown...

... retained 29 elements, 164 comprising eight major elements (presented as oxides: SiO2, TiO2, Al2O3, FeOT, MnO, 165 MgO, CaO, Na2O) and 21 trace elements (Sr, Th, Nb, Ta, Zr, Hf, Y, La, Ce, Pr, Nd, 166 Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu). Subsequently, we discarded clinopyroxene 167 samples with a high...

...) and BHVO-2G (basaltic glass) were measured along with the 135 samples to evaluate the data quality. Repeated analyses of BHVO-2G indicated the 136 precisions for SiO2, TiO2, Al2O3, FeO, MnO, MgO, and CaO were better than ±1.3% 137 (2SD), and for Cr2O3, Na2O, K2O, and P2O5 were better than ±5% (2SD...

... statements on the relative influences of H2O and temperature on melt viscosity of two end-member compositions, a Cordill- eran tonalite (63 wt% SiO2) and a two-mica leucogranite (75 wt% SiO2). These examples were chosen as they represent rocks from the extrema of granitic compositional space, and found...

... preserved in hornblende gabbro. (D) Acicular hornblende gabbro with abundant miarolitic cavities (marked with red arrows). (E) Chalcopyrite (ccp)-bearing miarolitic cavity within hornblende gabbro, denoting a release of ore-forming fluids. TiO2, Al2O3, FeOt, MnO, MgO, CaO, Na2O, and K2O were 20 s on-peak...

... veins and zones have lower CaO (16 26 wt%) and CO2 (10 18 wt%) and higher SiO2, Al2O3, FeO, and TiO2 contents (Table S3). All lithologies show similar light rare earth element (LREE)enrichment patterns, but the veins and zones have higher REE, Th, U, Zr, Hf, and Nb contents than marbles (Fig. S6...

... light microscopy and cathodoluminescence (CL) images prior to U-Pb in the NCKFMASHTO (Na2O-CaO-K2O-FeOMgO-Al2O3-SiO2-H2O-TiO2-O) chemical system using thermocalc v. 3.40 (Powell and of hornblende, plagioclase, quartz, and ilmenite. Some large garnet porphyroblasts are surrounded by plagioclase...

... analyses (oxide wt%) Sample No. Mineral analysis SiO2 TiO2 Al2O3 FeO T MnO MgO CaO Na2O K2O Total D154b Wm S2 45.59 0.28 34.77 2.52 bd 0.71 0.06 1.64 8.49 94.06 Chl S2 25.21 0.11 22.32 18.67 0.20 18.88 bd 0.02 0.06 85.47 Pl Syn-S2 60.25 na 24.51 0.22 na na 6.35 7.68 0.31 99.32 Ep Syn-S2 37.93 0.24 23.94...

... coefficients compared to anhydrous systems. Nabyl et al. (2020) suggested that the partitioning behavior of REEs during immiscibility is influenced by several factors, including the SiO2 content, the aluminum saturation index, and the ratio of (Na2O + K2O)/ (CaO + MgO) in the silicate melt. Only one research...

... and highlighted the necessity of caution when Geological Society of America Bulletin, v. 136, no. XX/XX 7 Yanshen Yang et al. Sample number SiO2 TABLE 2. MAJOR ELEMENTAL COMPOSITIONS OF GARNETS FROM THE SHIZHUSHAN DEPOSIT, SOUTH CHINA TiO2 Al2O3 Cr2O3 FeO MnO MgO CaO Total Si Ti Al Cr Fe Mn Mg Ca Fe2+ Fe3+ Adr...

...), then the dominant mechanism of crystal melt segregation is compaction: Table 1. Chemical compositions of granites used in experiments Oxide, wt% QFP (bulk*) QFP (melt*) &ó OG1 (bulk*) OG1 (melt*) &ó Beauvoir (bulk*) Beauvoir (melt ) SiO2 76.20 65.39&0.54 76.90 65.88&1.28 68.27 62.21 TiO2 0.22 0.10&0.08 0.055 0.05...

...: spectra alone, first-derivative 423 spectra, and several subsets of Cr spectra stratified into groups of roughly equivalent size by 424 SiO2 contents (38-48, 48-51, 51-55, and 55-60 wt% SiO2), TiO2 (0, 0-3, >0, and >3 wt Al2O3 425 (<12, 12-16, and >16wt Fe2O3T (<11, 11-15, and >15wt MgO (<9 and >9 wt CaO...

...-rich (12.2 to 19.7 wt. % MgO) and defines a distinct group plotting in the komatiite field in the Jensen plot (Figure 6 ). These samples are also characterised by high Ni (278 to 596 ppm), Cr (1006 to 2956 ppm), CaO/A12O3 of 0.8 to 1.3, low A12O3 (7.4 to 14.2 wt. %), TiO2 (0.4 to 0.9 wt. %) and K2O...

...) 0.998(T1 T3Si3.012O11)O(OH), the simplified formula is 36 Ca(Sm,REE,Ca)Al2(Fe2+,Al,Fe3Si2O7)(SiO4)O(OH), and the ideal formula is 37 CaSm(Al2Fe2Si2O7)(SiO4)O(OH), which requires (in wt SiO2 30.37, Al2O3 17.18, 38 Sm2O3 29.38, FeO 12.11, CaO 9.45, and H2O 1.52; the total is 100. Allanite-(Sm) is 39...

... 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...

... 0.00 0.00 0.00 0.00 0.00 0.00 0.04 0.02 Al2O3 0.03 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 SiO2 32.29 31.90 42.23 41.63 41.66 42.31 42.26 42.03 30.76 29.85 K2O 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.05 0.01 CaO 59.52 59.48 52.06 51.71 52.05...

... (Watson et al., 2006; Ferry and Watson, 2007). The value of TiO2 was assumed to be 0.7 296 (Chelle-Michou et al., 2014; Buret et al., 2016; Rezeau et al., 2019) for igneous rocks 297 containing titanite and ilmenite. In this study, the SiO2 and TiO2 for the 298 pre-mineralization monzogranite and syn...