Table 1 Comparison of JH and BGSB detrital zircons

From: Contemporaneous mobile- and stagnant-lid tectonics on the Hadean Earth

 

Sc/Yb > 0.1 (n)

U/Nb > 20 (n)

U/Nb > 40 (n)

δ18O > 6.1‰ (n)

JH metasediments

 >3.8 Ga

71% (254)

47% (238)

17% (238)

76% (242)

 <3.8 Ga

88% (109)

74% (89)

36% (89)

64% (103)

BGSB

 >3.8 Ga

18% (17)

26% (19)

5% (19)

40% (20)

 <3.8 Ga

52% (93)

89% (91)

40% (91)

22% (97)

  1. Percentages of CAS-type zircons (Sc/Yb > 0.1, U/Nb > 20 or U/Nb > 40, and δ18O > 6.1‰) grouped by age from the JH (this study) and BGSB13. n indicates the number of zircons analysed.
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