Table 1 Results for the three-stage model applied to zircon Z2

From: Record of low-temperature aqueous alteration of Martian zircon during the late Amazonian

 

Th/Uorig= 0.5 and ɸUE = 2

Th/Uorig= 0.5 and ɸUE = 5

Th/Uorig = 1 and ɸUE = 2

Th/Uorig = 1 and ɸUE = 5

Domain

Age of alteration (Ma)

Age of alteration (Ma)

Age of alteration (Ma)

Age of alteration (Ma)

Z2_1

314

139

209

88

Z2_2

67

27

21

9

Z2_3

261

112

174

73

Z2_14

312

131

150

61

Z2_15

181

74

121

49

Avg. alteration age

227

97

135

56

  1. Th/Uorig stands for the pre-alteration Th/U of the zircon and ɸUE is the uranium enrichment factor of the zircon due to alteration