Progress in Earth and Planetary Science

Table 2 Pb isotopic data of zirconolite in NWA 4485 obtained by NanoSIMS

From: NanoSIMS and EPMA dating of lunar zirconolite

Spot #	²⁰⁴Pb/²⁰⁶Pb	1σ (%)	²⁰⁷Pb/²⁰⁶Pb	1σ (%)	²⁰⁷Pb^/²⁰⁶Pb^	1σ (%)	²⁰⁴Pb/²⁰⁶Pb Age	± (1σ) (Ma)
1	0.000003	44	0.53863	0.23	0.53861	0.23	4350.5	3.4
2	0.000014	24	0.53722	0.23	0.53714	0.23	4346.5	3.4

²⁰⁷Pb^*/²⁰⁶Pb^* ratios are ²⁰⁴Pb-corrected for terrestrial common Pb

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