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Table 2 Summary of the starting material used, of experimental conditions, and of run products in order of abundance

From: Melting carbonated epidote eclogites: carbonatites from subducting slabs

Run

Geometry

Bulk

P (GPa)

T (°C)

Duration (h)

H2O (wt.%)

CO2 (wt.%)

CO2/H2O (wt.%)

Carbonate st. mat. (wt.%)

Volatile source

Run products

SPT1∙

Double capsule

59-3

3.7

750

159

2.85

6.98

2.4

OAD

cpx + gar + law + mgs + dol + cs ± epi

SPT1-8

Double capsule

80-3

3.7

750

159

2.85

6.98

2.4

OAD

cpx + gar + mgs + dol + ky + cs

SPT2∙

Double capsule

59-3

3.8

775

146

2.85

6.98

2.4

OAD

cpx + gar + epi + dol + mgs + ky + cs

SPT2-8

Double capsule

80-3

3.8

775

146

2.85

6.98

2.4

OAD

cpx + gar + mgs + dol + ky + cs

EFSP2∙

Double capsule

59-3

3.8

800

110

2.85

6.98

2.4

OAD

cpx + gar + epi + dol + mgs + ky + cs

EFSP1

Double capsule

80-3

3.8

800

110

2.85

6.98

2.4

OAD

cpx + gar + Mg-cc + ky + cs

EFSP3∙

Double capsule

59-3

3.8

900

92

2.85

6.98

2.4

OAD

cpx + gar + Mg-cc + glass + quench-cc + ky + cs

EFSP4

Double capsule

80-3

3.8

900

92

2.85

6.98

2.4

OAD

cpx + gar + Mg-cc + ky + cs + quench-cc + quench-sil

SPT3∙

Double capsule

59-3

3.8

1000

121

2.85

6.98

2.4

OAD

cpx + gar + glass + Mg-cc + ky + cs

SPT3-8

Double capsule

80-3

3.8

1000

121

2.85

6.98

2.4

OAD

cpx + gar + Mg-cc + ky + glass + cs

SPT7∙

Single capsule

59-3-ccb

3.8

900

175

0.38

4.84

12.7

11

cc + br

cpx + gar + Mg-cc + epi + cs + quench-cc ± ky

FB6∙

Single capsule

59-3-ccb

4.0

870

144

0.38

4.84

12.7

11

cc + br

cpx + gar + arg + quench-cc + ky + cs

SPT5∙

Single capsule

59-3-ccb

4.2

900

105

0.38

4.84

12.7

11

cc + br

cpx + gar + arg + dol + quench-cc + glass + ky + cs

SPT6∙

Single capsule

59-3-ccb

4.2

850

316

0.38

4.84

12.7

11

cc + br

cpx + gar + arg + ky + cs

SPT4∙

Single capsule

59-3-ccb

4.6

700

264

0.38

4.84

12.7

11

cc + br

cpx + gar + law + dol + cs

SPT9∙

Sandwich

59-3-ccb-CA

4.2

850

86

3.7

10

2.7

26.7

Al(OH)3 + cc + br

cpx + gar + arg + dol + ky + cs + quench drops

SPT8∙

Sandwich

59-3-ccb-CA

4.2

900

234

3.7

10

2.7

26.7

Al(OH)3 + cc + br

cpx + gar + quench-cc + glass + arg + Mg-cc + ky + cs

SPT10∙

Sandwich

59-3-ccb-CB

4.2

900

185

0.4

13.5

33.8

31

Al(OH)3 + cc + br

cpx + gar + quench-cc + glass + arg + Mg-cc + ky + cs

  1. Run indicates experiments also discussed in Poli (2015). Geometry: double capsule indicates synthesis experiments performed at vapor saturation, buffered at HM in the outer capsule; single capsule stands for experiments in single Au capsule, with an amount of volatiles adjusted to stabilize hydrous phases and carbonates only (see the “Methods” section); sandwich is for experiments in a single Au capsule, where a layer of carbonates is placed in between two layers of gels. H2O, CO2, and CO2/H2O are the total weight proportions and ratios of volatiles in the bulk composition. Carbonate st. mat. is the total amount of carbonate in the starting material, in weight proportions. Bulk: bulk composition of starting materials; 59-3 and 59-3-ccb: see Table 1; 59-3-ccb-CA: composition 59-3 with addition of a layer of Ca, Mg, Fe, and Na carbonates, simulating the liquid produced at 4.2 GPa, 900 °C (see Tables 3, 4, 5, 6, 7, and 8), and a layer of Al(OH)3 + SiO2, producing kyanite + H2O at run conditions. Volatile sources - OAD oxalic acid dihydrate, cc calcite, br brucite. Run products - arg aragonite, cs coesite, cpx omphacite, dol dolomite, epi epidote, gar garnet, glass silicate glass, ky kyanite, law lawsonite, Mg-cc (Mg,Fe)-calcite, mgs magnesite, quench-cc Ca-rich carbonate in dendritic, feathery, or lobed/fingered morphology; it includes individual grains of Na-carbonate