Table 1.

Summary of ages for Gujba chondrite using different chronometers.

Method	Materials	Initial	Anchor	Age U-correctede	Reference
U-Pb	Chondrule	–	–	4561.68 ± 0.51	1
Mn-Cr	Chondrule/metal	53Mn/55Mn   (3.18 ± 0.52) × 10−6	D’Orbignya   (3.24 ± 0.04) × 10−6   4563.37 ± 0.25	4563.3 ± 0.9	2
			LEW86010b   (1.25 ± 0.07) × 10−6   4557.53 ± 0.25	4562.5 ± 1.1
I-Xe	Chondrule	129I/127I   (1.16 ± 0.02) × 10−4	Shallowaterc   (1.072 ± 0.02) × 10−4   4562.3 ± 0.8	4563.2 ± 1.3	3
Hf-W	Metal	ε182W   −2.97 ± 0.16	CAId   4567.30 ± 0.16	4562.2 ± 2.4	4

^aGlavin et al. (2004); Brennecka and Wadhwa (2012).

^bLugmair and Shukolyukov (1998); Amelin (2008).

^cBrazzle et al. (1999); Gilmour et al. (2009).

^dConnelly et al. (2012).

^eCorrected using ²³⁸U/²³⁵U = 137.786 ± 0.013.

References: (1) Krot et al. (2005); (2) Yamashita et al. (2010); (3) Gilmour et al. (2009); (4) Kleine et al. (2005).