Auxiliary Material for Paper 2006gc001503

Oxygen-isotope and trace element constraints on the origins of silica-rich melts in the subarc mantle

J. M. Eiler
Division of Geological and Planetary Sciences, California Institute of Technology, MC 100-23, Pasadena, California 91125, USA (eiler@gps.caltech.edu)

P. Schiano
Departement des Sciences de la Terra (UMR 6524 “Magmas et Volcans”), Université Blaise Pascal, 5 Rue Kessler, F-63038 Clermont-Ferrand Cedex, France

J. W. Valley and N. T. Kita
Department of Geology, University of Wisconsin, Madison, Wisconsin 53706, USA

E. M. Stolper
Division of Geological and Planetary Sciences, California Institute of Technology, MC 100-23, Pasadena, California 91125, USA

Eiler, J. M., P. Schiano, J. W. Valley, N. T. Kita, and E. M. Stolper (2007), Oxygen-isotope and trace element constraints on the origins of silica-rich melts in the subarc mantle, Geochem. Geophys. Geosyst., 8, Q09012, doi:10.1029/2006GC001503
	
Introduction

These auxiliary materials consist of two sections: (1) the methods of standardization and raw data for ion microprobe analyses of oxygen isotope ratios in minerals and glasses examined in this study and (2) the distribution coefficients and source compositions used in trace element models.  Section 1 is accompanied by tables providing:  the major element and oxygen-isotope compositions of standards (Table S1); individual analyses of all oxygen-isotope standards used in this study (Table S2); new measurements of the major element compositions of Batan glass inclusions (Table S3); and raw measurements of all standard and sample materials in sample B3N, presented in the format commonly used to report oxygen isotope data from the University of Wisconsin ion microprobe laboratory ("WiscSIMS"; Table S4).  Section 2 is accompanied by tables providing:  trace element compositions of model sources (Table S5); distribution coefficients used in models of eclogite melting (Table S6); distribution coefficients used in models of eclogite-fluid partitioning (Table S7); and distribution coefficients used in models of depleted-peridotite melting (Table S8). 

1. 2006gc001503-txts01.txt:  Text containing two sections: (1) a description of the algorithm used to standardize ion microprobe measurements of oxygen isotope ratio and (2) a comparative review of distribution coefficients used in trace element models presented in this study.

2.  2006gc001503-ts01.txt (Table S1):  Table summarizing the major element and oxygen-isotope compositions of materials used to standardize ion-microprobe analyses presented in this study.
	2.1 Name of the standard
	2.2 Chemical formula of each standard, based on electron microprobe analyses
	2.3 Oxygen isotope composition, in units of per mil vs. the SMOW standard, of each standard.

3. 2006gc001503-ts02.txt (Table S2):  Individual SIMS analyses of delta-18-O in oxygen isotope standards, organized by sample holder and standard.
	3.1 Raw measured delta-18-O value; the averages of these values for any given standard are used to calculate the "IMF" (instrumental mass fractionation) for that standard.
	3.2 One standard deviation of measured delta-18-O value, based on internal statistics of the ion probe analysis.

4. 2006gc001503-ts03.txt (Table S3):  Electron microprobe analyses of major and minor element compositions of glass inclusions in Batan xenoliths.
	4.1 Inclusion number
	4.2 Weight per cent SiO2
	4.3 Weight per cent Al2O3
	4.4 Weight per cent CaO
	4.5 Weight per cent Na2O
	4.6 Weight per cent K2O
	4.7 Weight per cent FeO
	4.8 Weight per cent MgO
	4.9 Weight per cent P2O5
	4.10 Weight per cent TiO2
	4.11 Weight per cent MnO
	4.12 Weight per cent Cr2O3
	4.13 Parts per million S
	4.14 Parts per million Cl

Note the bottom two rows of each column give the average and standard deviation of all analyses for each element.

5. 2006gc001503-ts04.txt (Table S4):  Oxygen isotope analyses of sample and standard materials mounted together in sample B3N, reported in the "WiscSIMS" format.
	5.1 Analysis number, as recorded in U. Wisc. Lab book.
	5.2 Sample mount
	5.3 Comment (identity of sample)
	5.4 Beam size (either 5 or 10 micron)
	5.5 Raw delta-18-O, in per mil vs. SMOW
	5.6 1 standard deviation, internal error
	5.7 Corrected delta-18-O, based on comparison with standards.  See Auxiliary Material text for details.

6. 2006gc001503-ts05.txt (Table S5): Trace element compositions of assumed model sources.
	6.1 Element
	6.2 Parts per million in altered basalt, based on data from Bach et al. 2003.
	6.3 Parts per million in depleted mantle, based on data from Workman and Hart, 2005.
	6.4 Parts per million in primitive mantle, based on data from McDonough and Sun, 1995.

7. 2006gc001503-ts06.txt (Table S6): Distribution coefficients between bulk eclogite and silicate melt.
	7.1 Element
	7.2 Measured values from Klemme et al., 2002.
	7.3 Measured values from Xiong, 2006.
	7.4 Measured values from Xiong, 2006, including 1 % rutile in residue.
	7.5 Measured values from Kessel et al., 2005.  Note these experiments are for super-critical fluid, not melt.
	7.6 Estimated values from Salters et al., 2002.
	7.7 Estimated values from Kelemen et al., 2003b.
	7.8 Estimated values from Kelemen et al., 2003b, including 1 % rutile in residue.

8. 2006gc001503-ts07.txt (Table S7): Distribution coefficients between bulk eclogite or peridotite and aqueous fluid. 
	8.1 Element
	8.2 Data for eclogite at 2 GPa from Brenan et al., 1995a,b.
	8.3 Data for eclogite at 4 GPa from Kessel et al., 1995b.
	8.4 Data for eclogite at 4 GPa from Kessel et al., 1995b, including 1 % rutile in residue.
	8.5 Data for eclogite at 5 GPa from Stalder et al., 1998, including 1 % rutile in residue.
	8.6 Data for eclogite at 6 GPa from Kessel et al., 2005b.
	8.7 Data for peridotite at 2-3 GPa from Ayers et al., 1997.

9. 2006gc001503-ts08.txt (Table S8): Distribution coefficients between bulk ultra-depleted peridotite and silicate melt, based on mineral/melt D's given in Eiler et al. [2005].
	9.1 Element.
	9.2 Peridotite/melt distribution coefficient.