DATA REPOSITORY Table I: U-Pb SHRIMP geochronology data for zircon from diorite A31/7-5.
							Ages (Ma)	
Spot ID	206Pbc (%)	[U] (ppm)	[Th] (ppm)	232Th/238U	206Pb* (ppm)	%discordant	207Pb	±1	206Pb	±1	
							206Pb		238U		
63.1	0.14	532	336	0.65	39.1	-3	514	36	528.1	9.0	
64.1	1.75	182	83	0.47	13.2	13	579	154	514.1	9.3	
77.1	0.46	631	362	0.59	45.3	-9	470	38	515.7	8.8	
79.1	0.69	166	75	0.47	12.0	-14	447	86	517.0	9.1	
81.1	0.01	283	148	0.54	20.7	13	596	44	526.6	9.4	
111.1	0.19	385	244	0.66	26.8	-9	456	49	501.5	8.6	
132.1	0.37	131	60	0.47	9.5	-20	413	68	519.7	9.3	
127.1	0.13	354	102	0.30	25.4	-1	510	42	516.9	9.2	
165.1	-0.01	583	126	0.22	41.7	7	550	31	515.6	8.8	
289.1	0.35	257	111	0.45	17.6	6	522	61	492.5	8.6	
Concordia age (MSWD=1.3): 514.7±7.6 (95% confidence level)	
Xenocrysts										
1.1 (core)	0.00	813	514	0.65	329.3	-1	2462	5	2489.7	36.3	
1.2 (rim)	0.24	682	266	0.40	61.6	110	1350	42	643.2	11.0	
375.2	0.56	238	127	0.55	27.0	-11	710	49	794.3	13.5	

Data processed using SQUID v.1.06 and ISOPLOT v.2.49 (Ludwig, 2001a,b). Pbc and Pb* indicate the common and radiogenic portions, respectively. Error in standard calibration was 1.16% ((not included in above errors but required when comparing data). Ages are corrected for common lead using the measured 204Pb.