Assertion: ancient zircon | /r/HasAspect | th/u
Facets:
value: between 0.8
type: TEMPORAL
value: between 0.4
type: TEMPORAL
Source sentences:
text: This dichotomy is also expressed in measured Th/U ratios because altered zircons have Th/U between 1.5 and 3, whereas ancient well-behaved zircons have Th/U between 0.4 and 0.8 (Supplementary Data 4), consistent with terrestrial igneous zircons20, unaltered lunar zircons (Fig. 4), and Martian zircons analyzed by ID-TIMS41, which have Th/U between 0.6 and 0.7.