Table 1 Summary of geochronology and thermochronology ages

From: Exhumation and tectonic history of inaccessible subglacial interior East Antarctica from thermochronology on glacial erratics

Sample

Zircon U-Pb age (Ma) (±1σ)

AFT age (Ma) (±1σ)

Mean Length Std. Dev. (µm)

Mean AHe aged (Ma) (±1σ)

Group 1a

    

10LWB-4.5c

1848 ± 13

406 ± 20

12.6 (1.7)

220 ± 146

10LWB-4.1c

1865 ± 9

479 ± 21

13.4 (1.2)

382 ± 23

10LWA-8.1c

2015 ± 12

376 ± 13

12.1 (1.9)

152 ± 5

Group 2b

    

10LWA-11.1c

1213 ± 14

131 ± 4

13.3 (2.0)

86 ± 9

10MSA-2.3c

1410 ± 10

151 ± 6

13.6 (2.0)

–

10LWB-4.3c

1448 ± 5

80 ± 6

13.0 (2.3)

68 ±  26

10MSA-3.5c

1508 ± 12

101 ± 5

13.7 (1.8)

101 ± 17

  1. aCrystallization ages 1.8–2 Ga, upper crustal rapid cooling events in the Cambro-Ordovician (ca. 500 Ma) and mid-Cretaceous (ca. 125–90  Ma).
  2. bCrystallization ages 1.2–1.5 Ga, upper crustal rapid cooling events in the Jurassic and mid-Cretaceous (ca. 100 Ma).
  3. cLocations: LW Lonewolf Nunataks, MS Mt Sirius.
  4. dApatite (U-Th)/He mean ages and uncertainties are calculated using the method of Ault et al.62.
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