Large-ion lithophile elements delivered by saline fluids to the sub-arc mantle

Kawamoto, Tatsuhiko; Mibe, Kenji; Bureau, Hélène; Reguer, Solenn; Mocuta, Cristian; Kubsky, Stefan; Thiaudière, Dominique; Ono, Shigeaki; Kogiso, Tetsu

doi:10.1186/1880-5981-66-61

Earth, Planets and Space

Table 1 Composition of starting materials, experimental conditions, and experimental summary

From: Large-ion lithophile elements delivered by saline fluids to the sub-arc mantle

	Experiment name
	HGR	B	BB	BA	Jd	137	137C	137D	137E	137G
Starting material		HGR	HGR	HGR		Jd	Jd	Jd	Jd	Jd
Fluid		Water	Water	5 M (Na, K)Cl		Water	2.5 M NaCl	2. 5 M NaCl	5 M NaCl	5 M NaCl
wt.% (Na, K)Cl		0	0	25.0		0	12.7	12.7	22.6	22.6
Temperature (°C)		730	730	760		770	830	830	810	820
Pressure (GPa)		0.36	1	0.84		0.47	0.32	0.43	0.62	1.29
Homogenization temperature (°C)		330	150	245		308	403	365	330	168
Fluid density (g/cm³)		0.641	0.917	1.017		0.695	0.693	0.765	0.911	1.062
Anhydrous glass density (g/cm³)		2.337	2.337	2.334		2.461	2.449	2.449	2.453	2.451
Weight fraction of melt H₂O		0.077	0.119	0.112		0.069	0.066	0.07	0.072	0.064
Melt density (g/cm³)		1.941	1.973	2.038		2.095	2.097	2.122	2.188	2.261
Density ratio melt/fluid		3.029	2.151	2.005		3.013	3.024	2.775	2.402	2.13
$D_{Pb}^{fluid / melt}$ ± 1σ		0.065 ± 0.014	0.213 ± 0.009	2.576 ± 0.060		0.187 ± 0.026	0.593 ± 0.047	0.544 ± 0.033	1.033 ± 0.129	1.396 ± 0.133
$D_{Rb}^{fluid / melt}$ ± 1σ		0.039 ± 0.002	0.315 ± 0.006	1.343 ± 0.033		0.124 ± 0.007	1.450 ± 0.027	1.394 ± 0.063	1.923 ± 0.022	1.889 ± 0.099
$D_{Sr}^{fluid / melt}$ ± 1σ		0.021 ± 0.010	0.105 ± 0.015	0.533 ± 0.032		0.004 ± 0.001	0.029 ± 0.002	0.048 ± 0.007	0.095 ± 0.004	0.238 ± 0.009
	Starting glass	Quenched glass	Quenched glass	Not available	Starting glass	Not available	Quenched glass	Quenched glass	Quenched glass	Quenched glass
wt.% SiO₂	77.00	76.21	76.03		56.32		56.58	55.34	58.83	59.19
wt.% Al₂O₃	13.74	15.92	15.22		28.29		28.42	29.51	27.00	26.82
wt.% Na₂O	3.87	3.48	3.44		15.39		15.00	15.15	14.17	13.99
wt.% K₂O	5.39	4.39	5.31
Raw total	98.39	86.90	87.74		99.28		87.56	90.46	84.31	84.47
ASI	1.13	1.52	1.33		1.12		1.15	1.18	1.15	1.17
CIPW norm	Qz33.9Ab32.7	Qz39.2Ab29.4	Qz35.7Ab29.1		Ab57.8Ne39.2		Ab60.0Ne36.3	Ab56.7Ne38.7	Ab68.5Ne27.8	Ab70.0Ne26.2
CIPW norm	Or31.9C1.5	Or26.0C5.4	Or31.4C3.8		C3.0		C3.7	C4.6	C3.7	C3.8

Qz, quartz; Ab, albite; Or, orthoclase; C, corundum; Ne, nepheline; ASI, Al₂O₃/(Na₂O + K₂O) in moles. Density of aqueous fluids and pressure were calculated by equations of state of H₂O (Haar et al. 1984) or saline solutions (Zhang and Frantz 1987). H₂O concentrations in the melts were estimated by Moore et al. (1998). Anhydrous glass and hydrous melt densities were calculated by Bottinga and Weil (1970) and McBirney (1984), and Bureau and Keppler (1999), respectively. Major element compositions were recalculated to 100 total oxides. Raw total oxides were lower than 100 mainly due to H₂O abundances in quenched glasses.

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