Table 6. Ion microprobe U-Th-Pb analytical data for zircons from Khadarta mafic granulite sample 03132
Grain	238U	232Th	Th/U	f204	238U/206Pb	207Pb/206Pb 	238U/206Pb age	207Pb/206Pb age	
Area	(ppm)	(ppm)		(%)		(±1s)		(±1s)	(Ma)	(±1s)	(Ma)	(±1s)	
*1.1	4049	184	0.10	0.05	12.916	0.196	0.05632	0.00033	480.8	7.0	465	13	
*1.2	2115	214	0.20	0.10	12.817	0.219	0.05769	0.00059	484.3	8.0	518	22	
*2.1	1014	90	0.34	0.09	11.793	0.179	0.05658	0.00080	524.7	7.7	475	31	
*2.2	232	26	3.85	0.12	14.159	0.273	0.03937	0.00638	440.8	8.2	---	---	
3.1	2764	377	0.13	0.14	11.995	0.184	0.05727	0.00038	516.2	7.6	502	14	
*4.1	1272	93	0.34	0.08	13.578	0.201	0.05445	0.00087	458.2	6.5	390	36	
*4.2	1297	104	0.24	0.08	12.959	0.192	0.05774	0.00061	479.2	6.8	520	23	
9.1	1497	119	0.25	0.08	12.378	0.185	0.05679	0.00062	500.9	7.2	484	24	
*9.2	1321	115	0.31	0.09	11.688	0.181	0.05723	0.00065	529.3	7.9	501	25	
22.1	2159	165	0.13	0.08	12.291	0.181	0.05679	0.00050	504.2	7.1	483	20	
27.1	1286	119	0.30	0.10	12.026	0.179	0.05702	0.00069	515.0	7.3	492	26	
28.1	2018	145	0.08	0.07	12.169	0.191	0.05709	0.00050	509.1	7.7	495	19	
28.2	1186	103	0.13	0.09	12.403	0.191	0.05699	0.00042	499.9	7.4	491	16	
27.2	1038	103	0.07	0.10	12.327	0.199	0.05762	0.00040	502.8	7.8	515	15	
Notes: f204 is the proportion of common 206Pb in measured 206Pb, as determined by measured 204Pb. Isotope ratios and ages are corrected for common Pb. Uncertainties in 238U/206Pb ratios and ages do not include uncertainty (1s) of 0.54%, arising from calibration against the reference standard. Analyses marked with asterisks were not included in calculating the mean age for the sample.