Figure 3: The result of SIMS U–Pb dating of apatite in DaG 978.
From: Young asteroidal fluid activity revealed by absolute age from apatite in carbonaceous chondrite
(a) Inverse 204Pb/206Pb–207Pb/206Pb isochron diagram. (b) The projected diagram onto the 238U/206Pb–207Pb/206Pb plane of the total Pb/U isochron in the 238U/206Pb–207Pb/206Pb–204Pb/206Pb three-dimension space. All data suggest that the crystallization age of apatite in DaG 978 is 4,450 Myr. The uncertainties for individual analyses are reported as 2 s.d. The 207Pb/206Pb isochron and total Pb/U isochron ages were calculated at the 95% confidence level. MSWD, mean square of weighted deviated.
