Table 2.

Mg# and oxygen isotope ratios of individual grains in heterogeneous chondrules.

Chondrule Type-texture	Mg#	minerals	δ18O	unc.a	δ17O	unc.a	Δ17O	unc.a
Session-1: 15 μm beam size
A7	99.1	ol	−5.5	0.1	−8.5	0.3	−5.7	0.3
I-POP	99.0	ol	−5.8	0.1	−9.3	0.3	−6.3	0.3
	99.1	ol	−6.7	0.1	−9.3	0.3	−5.8	0.3
	99.1	ol	−5.2	0.1	−7.9	0.3	−5.2	0.3
	99.2	ol	−10.8	0.1	−13.7	0.3	−8.0	0.3
	99.1	ol	−21.4	2.0†	−23.9	1.9†	−12.8	0.9†
	99.2	LPx	−4.9	0.1	−8.0	0.3	−5.4	0.3
	98.6	HPx	−3.2	0.1	−6.3	0.3	−4.6	0.3
Session-2: 10 μm beam size
B3	99.1	ol	−2.4	0.3	−5.8	0.6	−4.5	0.7
I-POP	99.0	LPx	−5.2	0.3	−8.0	0.6	−5.3	0.7
	99.2	LPx	−4.5	0.3	−7.0	0.6	−4.7	0.7
	99.2	LPx	−3.2	0.3	−5.6	0.6	−4.0	0.7
	99.2	LPx	−3.4	0.3	−6.5	0.6	−4.7	0.7
	99.2	LPx	−3.2	0.3	−5.9	0.6	−4.2	0.7
	99.2	LPx	−3.0	0.3	−5.8	0.6	−4.2	0.7
	99.3	LPx	−4.7	0.3	−7.9	0.6	−5.4	0.7
	99.1	LPx	−3.7	0.3	−6.8	0.6	−4.9	0.7
A8	98.6	ol	−3.4	0.3	−6.6	0.6	−4.9	0.7
I-POP	98.9	ol	−3.3	0.3	−6.7	0.6	−5.0	0.7
	98.9	ol	−3.5	0.3	−6.7	0.6	−4.9	0.7
	98.9	ol	−2.3	0.3	−5.9	0.6	−4.7	0.7
	98.9	ol	−2.6	0.3	−5.5	0.6	−4.1	0.7
	98.9	ol	−2.1	0.3	−5.5	0.6	−4.4	0.7
	98.9	ol	−2.7	0.3	−5.5	0.6	−4.0	0.7
	99.1	LPx	−3.1	0.3	−6.1	0.6	−4.5	0.7
A4	99.5	ol	−4.7	0.3	−7.9	0.5	−5.5	0.6
I-PP	99.3	ol	−4.7	0.3	−7.6	0.5	−5.1	0.6
	99.2	ol	−7.5	0.3	−10.0	0.5	−6.1	0.6
	99.3	ol	−5.0	0.3	−8.0	0.5	−5.4	0.6
	99.4	ol	−5.3	0.3	−8.3	0.5	−5.6	0.6
	99.2	LPx	−7.4	0.3	−10.3	0.5	−6.4	0.6
	99.4	LPx	−5.3	0.3	−8.6	0.5	−5.8	0.6
	98.9	LPx	−6.2	0.3	−9.2	0.5	−6.0	0.6
	99.3	LPx	−5.5	0.3	−9.3	0.5	−6.5	0.6
CIO	99.3	ol	−3.8	0.3	−7.1	0.6	−5.1	0.6
I-GO	99.3	ol	−6.5	0.3	−9.3	0.6	−6.0	0.6
	99.3	ol	−4.2	0.3	−7.5	0.6	−5.3	0.6
	99.3	ol	−5.7	0.3	−8.9	0.6	−5.9	0.6
	99.3	ol	−5.3	0.3	−7.9	0.6	−5.2	0.6
	99.4	ol	−5.5	0.3	−8.7	0.6	−5.8	0.6
	99.4	ol	−5.8	0.3	−8.8	0.6	−5.7	0.6

^aUncertainties of oxygen isotope ratios are the spot-to-spot reproducibility (2SD), as determined by bracketing analyses of SC olivine.

^†2SE of the measurement (see EA4)