Table 1 Results of 40Ar/39Ar groundmass incremental heating experiments for S0230 samples.

From: Superplume mantle tracked isotopically the length of Africa from the Indian Ocean to the Red Sea

Sample information

Plateau

Inverse isochron

Experiment

Sample

Age ± 2σ (i)

39Ar

(%)

K/Ca

MSWD

n

N

Age ± 2σ (i)

40Ar/36

Ar intercept ± 2σ

a17D17844

MW14DL3-5

6.90 ± 0.02 Ma

72%

0.357

1.35

12

24

6.90 ± 0.02 Ma

287.03 ± 7.33

bVU107-J3_1

MW14DL3-5

6.94 ± 0.03 Ma

73%

0.325

1.87

8

15

6.89 ± 0.04 Ma

316.22 ± 10.88

a17D17979

MW14DL2-3

6.91 ± 0.02 Ma

52%

0.267

3.26

7

24

6.89 ± 0.05 Ma

315.46 ± 31.97

bVU107-J2_1

MW14DL2-3

6.99 ± 0.03 Ma

63%

0.326

2.07

6

15

6.92 ± 0.06 Ma

321.16 ± 15.79

a17D18018

MW14DL2-2

6.97 ± 0.02 Ma

57%

0.173

0.40

11

24

6.97 ± 0.03 Ma

354.12 ± 7.97

bVU107-J1_1

MW14DL2-2

7.26 ± 0.12 Ma

43%

0.168

7.94

4

15

6.87 ± 0.88 Ma

332.07 ± 74.98

  1. Italics are for a rejected age
  2. a200–180 μm; 1 N HCl (60 min); 6 N HCl (60 min); 1 N HNO3 (60 min); 3 N HNO3 (60 min); Mill-Q (60 min)
  3. b355–200 μm; 1 N HNO3 (120 min); Mill-Q (60 min)
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